Abhiteja Achanta, Multi-Class Text Sentiment Analysis, August 2020 ( Yichen Qin, Liwei Chen)
The goal of sentiment analysis is to extract human emotions from text. This project applies various machine learning algorithms to predict sentiment of reviewer from his textual review on Amazon food products. Metrics such as accuracy of prediction and precision/recall are presented to gauge the success of these different algorithms. Main purpose of this project is to introduce and apply different feature engineering techniques to convert text to numeric data and see how different Machine learning and Deep Learning algorithms perform with this data.
Jeevisha Anandani, Recommender System, August 2020 (Peng Wang, Michael Thompson)
This project compares two approaches to build a movie recommender system. First one implements Bayesian Network by learning the Conditional Probability Distributions from the data. Bayesian Networks belong to a class of algorithms known as probabilistic graphical models. This Bayesian network is then used to predict ratings. It uses Maximum Likelihood Estimation to estimate the conditional probability distributions. The other approach of Collaborative Filtering (Matrix Factorization) is applied to view the recommendations and the results as compared with the prior approach. Alternating Least Squares algorithm was implemented to predict user ratings using PySpark.
Vidhi Bansal, Bike Rental Prediction Analysis, August 2020 (Yan Yu, Dungang Liu)
Bike sharing systems are a means of renting bicycles where the process of obtaining membership, rental, and bike return is automated via a network of kiosk locations throughout a city. Currently, there are over 500 bike-sharing programs around the world. Such systems usually aim to reduce congestion, noise, and air pollution by providing free/affordable access to bicycles for short-distance trips in an urban area as opposed to motorized vehicles. The data generated by these systems makes them attractive for researchers because the duration of travel, departure location, arrival location, and time elapsed is explicitly recorded. Bike sharing systems therefore function as a sensor network, which can be used for studying mobility in a city. The ability to predict the number of hourly users can allow the entities (businesses/governments) that oversee these systems to manage them in a more efficient and cost-effective manner. Our goal is to use and optimize Machine Learning models that effectively predict the number of ride-sharing bikes using available information about that time/day.
Rahul Bhasin, An Analysis of UC Center for Business Analytics Project Feedbacks using NLP, August 2020, (Mike Fry, Andrew Harrison)
The University of Cincinnati Center for Business Analytics helps its corporate clients solve business problems by developing analytical solutions utilizing data mining techniques and popular analytics tools. It supports its member firms through a variety of options like contracted projects, capstone projects, and case studies. For case studies, the client firms outline the business problem, provide datasets for graduate students to analyze, and upon completion of case study projects both clients and students submit feedback forms. These feedback forms contain opinions about the BANA 7095 course (Graduate Case Studies in Business Analytics) on aspects that they liked about the project and aspects that can be improved. The scope of our analysis is to delve into the provided feedback to analyze the satisfaction level of students and gauge emotions using a lexicon approach. Additionally, we aim to identify key topics and critical issues using Latent Dirichlet Association (LDA) and Non-Negative Matrix Factorization (NMF) algorithms, capturing context using Word2Vec Word Embeddings and understanding the association between review words using n-grams. This analysis reveals important insights about case study projects which can be used to improve students’ and member firms’ future project experiences.
Puneet Bhatia, Refreshing Student Transfer and DFW Dashboards, August 2020 (Michael Fry, Brad Miller)
In my summer internship at the Office of Institutional Research at the University of Cincinnati my project is to refresh the Student Transfer Dashboard with 2018 and 2019 student data and DFW Dashboard with the Spring 2020 cohort data. The process involves fetching data from the Catalyst Reporting Tool (CaRT) using queries and then creating the required input file for Tableau dashboard through data manipulation using SAS. The final step is to make the required reporting changes in Tableau to make it consistent with the new data.
Nikhila Nayana Bobba, News classification into fake or real news, August 2020 (Yichen Qin, Liwei Chen)
Text Classification a supervised machine learning task used to automatically classify the text documents into one or more defined categories. The classifier basically uses a labelled dataset to train a classifier. Fake news is not only being used to influence politics and promote advertising but also has become a method to stir up and intensify social conflict. Stories that are untrue intentionally mislead readers and cause growing mistrust among people. I have used a text classification to classify news into two bins: true and fake.
Vallabh Reddy Burla, APPAREL IMAGE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORKS, August 2020, (Dungang Liu, Yan Yu)
Motivation: The internet has only been getting more expansive. And this expanse brings unstructured data, like images. These are difficult to organize because the subjects in an image are not readily interpretable by machines. But deep learning innovation has picked up momentum and it is much easier to build models which are able to make sense of image data and classify their contents.
Problem Statement: Classify images from 10 apparel categories. The dataset used is the Fashion MNIST dataset by Zalando Research which consists of 28x28 grayscale images of apparel. The train set contains 60,000 labeled images and the test set contains 10,000.
Approach: I used Convolutional Neural Networks (CNN). They are effective because the Convolutions work with images directly and learn to look for patterns in the input. Deeper convolutions look for more complex patterns. My final model has 3 convolutional, 3 dropout, 1 max pooling, 1 flatten and 1 output layer. There are 100 neurons in each of the convolutional layers and 10 neurons in the output layer, one for each category of output. I trained the network for 20 epochs with a learning rate of 0.0001.
Results: The final training accuracy is 94.53% and testing accuracy is 92.52%.
Conclusions: CNN can make highly accurate predictions for this dataset with a small network. The deeper networks I built with a much higher number of neurons or layers fared worse than the smaller network.
Xingchen Chen, Direct Mail Campaign Geography Optimization, August 2020, (Peng Wang, Farhad Rahbardar)
This capstone is part of the work project I participate in during my internship in Axcess Financial.
The main goals of this project are: 1, to find insights and relationship between current Direct Mail geographic distribution vs Trade area and DM driven concentration, to check how current direct mail distribution works, and 2, to make recommendation to optimize mail distribution.
Major steps here include, 1, identified 3 concentration areas: trade area (where 75% of new customers come from), direct mail driven customer concentration area (where 75% of new direct mail driven customers come from), and mail concentration area (where we drop 75% of direct mails), 2, checked 3 how those 3 concentration areas related, compared the campaign performance of overlap vs. non-overlap areas and identified opportunity areas to improve direct mail efficiency, and 3, made recommendations based on the comparison of performance.
Customer data and direct mail data pulled from internal snowflake database using structure query language. Summary statistics and interactive dashboards were created in Tableau to get insights on characteristics of 3 concentration areas and see how overlap and mismatch areas distributed. Result of this project shows that majority of those 3 concentration areas overlaps and current direct mail distribution works well, but room for improvement exists. Recommendations are made based on what we found as well.
Zhuo Chen, Insurance Wholesalers Activities Analysis, August 2020, (Michael Fry, Harlan Wahrman)
The objective of this project is to enhance future sales of a life insurance product which is sold through banks to individual customers. The models use the past records of wholesalers’ activities and bank representatives’ sales performance related to this product. The distribution and wholesaling team will use the development of this project to optimize the wholesaling strategy and guide wholesalers’ daily activities. Moreover, due to the COVID-19 pandemic, bank representatives’ meeting preference with wholesalers has changed from in-person to online media. This change challenges the data scientist to find the most effective activities during pandemic and to provide recommendations to wholesalers. Market-mix modeling (MMM) and unsupervised learning are used to evaluate the different activities’ impact on sales performance, especially in 2Q 2020 due to challenges caused by the pandemic. Business recommendations are provided to optimize the wholesalers’ activities and the life insurance company’s business strategy.
Himanshu Chhabra, Uber & Lyft Price Prediction, August 2020, (Yan Yu, Dungang Liu)
Ridesharing services are companies that match drivers of private vehicles to those seeking local taxicab-like transportation. Ridesharing services are available mostly in large cities in many countries. Some of the biggest names in the industry are Uber, which exists in 58 countries and whose name is almost synonymous with ridesharing services, and Lyft, which covers many American cities. Uber and Lyft both are American multinational ride-hailing companies offering services that include peer-to-peer ridesharing, ride service hailing, and a micro-mobility system with electric bikes and scooters. Their platforms can be accessed via websites and mobile apps. In California, Uber is so dominant that it is a public utility, and operates under the jurisdiction of the California Public Utilities Commission. Ridesharing systems generate a lot of data that can be used for studying mobility in a city. The ability to predict the peak time of the day and the day of the week can allow the businesses to manage them in a more efficient and cost-effective manner. Our goal is to use and optimize Machine Learning models that effectively predict the price using the available information about that time/day and the weather conditions.
Vincent Chiang, Heart Disease Prediction using Various Factors and Determination of Key Factors Leading to Heart Disease, August 2020 (Leonardo Lozano, Yan Yu)
Heart Disease is a major issue within the United States with millions of people affected as well as being the number one cause of death in the United States. As such, there is a demand for predictive models that take health data and determine if there is a high probability of a person having heart disease. In this paper, attempts were made to formulate high accuracy predictive models using classification trees, random forest and boosting as well as to improve upon the models and their default parameters.
Kevin Dalton, A modern Bayesian workflow approach to actuarial non-life rate-making in R with the brms package, August 2020, (Michael Thompson, Peng Wang)
Bayesian Generalized Linear Models are currently not used extensively in the insurance industry despite their discussion in the actuarial literature. We model a typical automobile claims dataset using a modern Bayesian data analysis workflow to illustrate and develop this workflow in an actuarial setting. Using the brms package we generate the parameters of a theoretical policy premium based on policyholder characteristics and explore the use of zero-inflated count distributions in a generalized linear multilevel model context.
Manoj Kumar Eega, Identifying Credit Card Fraud using Machine Learning, August 2020, (Yan Yu, Dungang Liu)
It is important that credit card companies can recognize fraudulent credit card transactions so that customers are not charged for items that they did not purchase. Even though the percent of a fraudulent transaction is very low in proportion to the total transactions, fraud transactions can hamper the consumer sentiment. This will be a damaging thing to the company, as the customer might not use the card later, and for the country, because a huge negative sentiment will put the consumption based economies at risk. So, we decided to use our skills to build a model that can accurately classify fraud transactions. I found this problem particularly interesting because the problem at hand has a huge class imbalance. It is a challenge to address this issue and simultaneously build models that have good recall and accuracy. So, we want to use all the techniques available to address the class imbalance and build the best model that has the highest predictive capability. I am addressing a real-world problem with real-world data. All transaction monitoring companies such as credit card companies, banks, insurance companies, etc. can make use of this project.
Emily Fischer, COVID-19 Impact on Strength Training, August 2020 (Leonardo Lozano, Alex Wolfe)
The purpose of this study is to determine the impacts of the SARS-CoV-2 pandemic on the strength of a weightlifter. This was an observational study. The data was reviewed for the time period of 1/1/2020 to 6/22/2020 and included 60 workouts prior to the gyms closing, 50 at-home exercises, and 3 workouts back at the gym after the gyms reopened (this data was excluded as there were not enough data points to form a trend). Without the appropriate equipment available for at home workouts, the user saw decreases in strength in bench press (-4.35%), bent over row (-5.71%), deadlift (-11.21%), overhead press (-2.78%), and squat(-10%) which appears to be due to a reduction in overall sets per week. The user saw increases in strength in bicep curl (+3.17%), chest dips (+5.4%), and incline bench press (+4.36%). This is likely due to a low discrepancy between pre-COVID and during the gym closure. With SARS-CoV-2 virus continuing to spread in the United States, the likelihood of gyms to close and/or the risk profile to attend gyms will continue to be high. The solution to this ongoing challenge was to create an advanced simulation to quickly generate effective workouts. The final simulation generated allows the user to select their preferred exercises, goal (power/strength/endurance), reps, and sets and then validate if they would likely complete the workout within the selected time constraint. This will be an easier method to create workouts and to continue to motivate the user throughout these uncertain times.
Himaja Gaddam, Analysis of Household Electric Power Consumption, August 2020, (Yichen Qin, Dungang Liu)
The energy sector has been an important driver of industrial growth over the past century, providing fuel to power the rest of the economy. Many things in our life starting from lighting our rooms to operating a heavy machinery runs on electricity. Nowadays all the countries are concerned about providing sufficient energy to the consumers as well as optimizing the total demand of energy consumed. Since a significant part of that energy is consumed by household sector, the optimal consumption of the energy at home is of great importance. To better regulate the production of energy it is important to understand the energy needs of this sector which can be done by analyzing the past energy consumption data. This report presents the analysis of electric power consumption data of a household collected every minute for 4 years. The given data is analyzed by aggregating the data over hour. Different models are trained on the aggregated training datasets using the approaches VAR and LSTM.
Rasesh Garg, Movie Recommender System, August 2020 (Michael Fry, Peng Wang)
Recommender systems are a crucial aspect of digital businesses today. Whether one is shopping on Amazon, watching a movie on Netflix, or listening to songs on Spotify, one wants to have personalized recommendations that can save them the hassle of searching through an overwhelming number of choices. A sound recommendation system helps companies enhance the user experience and engage with their customers, resulting in higher revenues for the company. This project explores building a Movie Recommender system using the historical data of the user movie ratings. It uses two popular approaches for this – content-based filtering and collaborative filtering. While content-based filtering is agnostic to users and based only on the content of the movie, collaborative filtering is more personalized and considers the historic user ratings. This project report describes these approaches, the mathematics behind them, and the results obtained using a real-life public data set.
Saket Kumar Garodia, Sentiment Trend Analysis on Twitter data to analyze Insurance Risk, August 2020, (Michael Fry, Naziya Rehman)
Usually, any insurance company has a few questions to answer before insuring any product. What are the products it should insure? What should the premium be of the products it wants to insure? What is the risk that it is taking in insuring the products? These questions are important for any insurance company since companies in the insurance industry faces many uncertainties and therefore a detailed analysis is useful and can save considerable money.
In the era of artificial intelligence, social media can be leveraged to answer a lot of questions for insurance companies. People show their appreciation as well as frustration towards a product through social media. If there is a way to understand the sentiments expressed about a product, it can be very useful.
This project analyzes the tweets to understand their sentiment over time. This analysis will help Great American Insurance in their underwriting decisions.
Anjali Gautam, Prioritization of Calls, August 2020, (Michael Fry, Siddharth Krishnamurthi)
For a Collections Team in a bank, contacting customers via calls is one of the key methods to collect a debt. The team is also required to consider various components associated with this method such as the amount of debt, the number of missed payments, available calling agents, and more. Since all customers are not equally risky in terms of loss of debt associated with them, calling all of them with equal priority is not effective, and therefore prioritizing customers is important. To utilize calling customers efficiently it is of significance to assign a priority to customers leveraging information of the customer with the bank. In this project, I have explored account balances, information on missed payments, and probability score (based on the probability of customer missing more payments in future) of customer accounts to define priorities from different approaches. These priorities will be used by the bank to focus collection efforts via calls efficiently. Additionally, I have built a framework for KPI tracking which will be used to assess the working of defined priorities in the future.
Harshal Goswami, Movie Recommender System, August 2020, (Yan Yu, Liwei Chen)
As the data in every business is increasing, need to extract meaningful information from gamut of data is both a time saver and requirement for better decision making. Same is true for online entertainment platform like Netflix, Amazon Prime, Spotify and many others. Recommender systems are in forefront to solve this problem. These systems collect information from the users to improve the future suggestions. This paper aims to describe the implementation of a movie recommender system via Content based, Collaborative filtering and Hybrid algorithms using python.
Prakhar Goyal, Digit Classification Model, August 2020, (Dungang Liu, Yan Yu)
The main objective of this capstone project is to classify a given image of a handwritten digit into one of 10 classes representing integer values from 0 to 9, inclusively.
This model is part of a collaborative project, the other part being to create an object detection model. The aim of the two parts is to design a system that can detect and recognize Vehicle Number plates. Once the license plate is detected, it would undergo processing, and the text data can easily be edited, searched, indexed and retrieved.
I have tested 2 different machine learning models(SVM and CNN) to find the best model for the classification task. The best model for handwritten digit classification is SVM with an accuracy score of 99.35% on the test dataset and taking one-third time to train the hyperparameters in comparison to CNN.
Srujana Guduru, Netflix Movie Recommendation System using Collaborative Filtering, August 2020 (Yichen Qin, Dungang Liu)
We love Netflix for the movie recommendations it does. Movie or content recommendation is very important for Netflix as engaging users more and more brings them more revenue. But dealing with human preferences or interests is extremely challenging. As they say, in many cases a subscriber may visit Netflix without knowing what exactly to watch. If he did not find any interesting movie in his recommendations, there is a high chance of the subscriber leaving the site. To avoid this, recommendation is highly used to increase the customer engagement on Netflix. Each subscriber is nuanced in what brings them joy and how that varies based on the context they are set in. Moreover, tastes and preferences of customers might change over time which further complicates the recommendation process. In this project, we focused on collaborative filtering where the behavior of a group of users is used to make recommendations to other users. Recommendation is based on the preference of other similar users. We used Surprise library, a Python scikit library for analyzing recommender systems that deal with explicit rating data. Recommendation models are built on the Netflix data using the ready-to-use prediction algorithms of Surprise library- Surprise BaselineOnly, Surprise KNN Baseline with user-user similarity, Surprise KNN Baseline with Movie-Movie similarity, Singular Value Decomposition (SVD) and Singular Value Decomposition ++ (SVD++). The best recommendation model obtained is Singular value decomposition (SVD) using SGD and 5 factors with Test RMSE of 1.131933.
Praveen Guntaka, Sentiment Analysis, August 2020, (Dungang Liu, Liwei Chen)
In this digital era understanding, polarities within a text statement had emerged to be an important factor for the businesses, as they can extract the extent of customer satisfaction or even a suggestion on their product. But, humanly it is impossible to perform this. Sentiment Analysis is the classification of human emotions like positive, negative and neutral on a text sentence. It is a text analysis method to determine the polarity within the text, a whole document, a sentence, or a paragraph.
Our end goal is to build a model to predict the polarity or sentiment of a review, for that we will start with text cleaning and perform exploratory data analysis to understand the data better and then proceed to topic modeling where we try to cluster these reviews into their potential topics, once we get the topics clustered we then move onto the important segment, that is sentiment analysis, where we try to fetch polarity of each sentence (review). Our final model will be built with the help of machine learning algorithm and then we will evaluate our model with evaluation measures like accuracy, precisions, recall, etc.
At the end of this project we must be in position to predict the polarity of a review for a company, as we are going build a process, the same application can be used for different datasets(with some minute changes) to get sentiments out of it.
Hardik Gupta, Music Genre Classification (Spotify Dataset), August 2020, (Dungang Liu, Liwei Chen)
A dataset of 32,833 songs with 12 audio features for each of the songs provided by Spotify was analyzed to determine whether these audio features could be used to classify songs into 6 different genres. Genre classification is an important task for any online music streaming service. Amongst the 3 data mining techniques i.e. Linear Discriminant Analysis, Decision Trees, and Random Forest used Random Forest gave us the best classification rate of 49.34% improving random chance by more than 3 folds.
Results indicate that genres like Rap and EDM are the easiest to classify as Rap songs are high on speechiness and EDM tracks are high on tempo and energy.
Shubham Gupta, Text Analytics: Predicting product recommendation by customers based on the reviews, August 2020, (Leonardo Lozano, Peng Wang)
People usually purchase online products after looking at how much star rating it has and after shortlisting the product, they usually read several text reviews written by other customers who have purchased this product. E-commerce companies build recommendation engines to market specific products to a customer which have been purchased (and liked) by similar customers. While deciding whether a customer liked a product or not (to decide whether to recommend it to similar customers), star rating given by customer can be easily utilized. But the star rating may not capture the entire sentiment of a customer about a product. Also, studies have shown that customers trust the content in written review over a ‘5-star-fake’ review (which might be written by the product seller).
In this paper, we will use text mining techniques to use the reviews written by customers to predict whether a customer will recommend a product or not.
Soumya Halder, IBM HR Analytics Attrition Analysis, August 2020, (Yan Yu, Liwei Chen)
IBM is a multinational technology company which provides products ranging from hardware and software to consulting services along with innovations through research. Being a key player in the analytics industry, they have developed multiple game changing products to drive down costs and build up accuracy. These products have been significant for the organization as well as various clients across domains. However, for continuity in growth, its essential to retain their workforce and make the employees feel valued. As per the data, the attrition rate stands at 17% which may not sound alarming by industry standards but when unwanted employee attrition takes place, it can harm the company in long run.
The problem is approached through performing extensive data analysis and predictive modeling to understand the key factors behind employees feeling burnout, fatigue and eventually leave. On analyzing the results, some of the changes that should be deployed by management are providing a proper career path for younger employees, monitor working hours, incentivize overtime, etc. which will improve current employee satisfaction levels.
Xiaojing He, Carbo-loading Sales Analysis, August 2020, (Yichen Qin, David Curry)
Global sales of pasta, pasta sauce, pancake mix, and syrup have been growing fast in recent years and are forecasted to grow even faster. The U.S. is one of the most important markets for these items, especially pancake mix and syrup. This thesis uses advanced statistical procedures – Time Series Analysis, K-means Clustering, and Association Rules Analysis – to detect sales trends, forecast future sales, and improve promotional strategies for these items. Data are from the open-source Carbo-Loading database available from 84.51°, which includes records from more than 5 million transactions for these items from two large U.S. geographical regions in which a large retailer operates. ARIMA models and VAR models were compared in the Time Series Analysis section. ARIMA models are adopted as the final models for sales forecasting. Results suggest that zip-code clusters that complement those in 84.51°’s original geo-based management system will provide a more precise solution to regional segmentation. Finally, results from Association Rules Analysis suggest important cross-selling opportunities for Private Label Fettuccini and Ragu Cheese Creations Alfredo Sauce.
Sanjay Jayakumar, Using ensemble methods to estimate the unit sales of Walmart retail goods, August 2020, (Peng Wang, Yichen Qin)
Business forecasts help organizations prepare and align their objectives by providing a big picture of the future. Improving the accuracy of forecasts, hence, is one of the integral factors in the business planning of organizations. This project explores different ways to forecast unit sales of products with the objective of zeroing in on the model with the least error. A special focus is given on ensemble models during the study. Ensembles are recognized as one of the most successful approaches to prediction tasks. Previous theoretical studies of ensembles have shown that one of the key reasons for this performance is diversity among ensemble models. This project aims to compare the performance of two key ensembles, XGBoost & Light GBM with a baseline Seasonal ARIMA model.
Krithika Jayaraman, Image Caption Generation using Deep Neural Networks, August 2020 (Yan Yu, Peng Wang)
Automatic Image-Captioning is an interesting application that is a combination of Computer Vision and Natural Language Processing. This involves recognizing the contents of an input image and a language model to turn the understanding into a meaningful sentence or words describing the image. There are various applications of Image captioning such as image indexing for Content-based Image Retrieval (CBIR) which in-turn has applications in e-commerce, education, ads, social media. Deep-learning methods have demonstrated state-of-the-art results in this type of application. In this project, I present a comprehensive model that utilizes a pre-trained model such as ResNet for image inference and a Long Short-Term Memory (LSTM) based Recurrent Neural Network (RNN) to generate sequence of text. I use the Bilingual Evaluation Understudy (BLEU) score to quantify the accuracy of the captions and performance of the model. This model has achieved a BLEU score between 0.5 and 0.6 on the captions generated for the validation set.
Pushpa Jha, Natural Language Processing: Topic Modeling, August 2020, (Peng Wang, Yan Yu)
Natural Language processing is one of the most prominent techniques that helps us deal with unstructured data in a more effective and quick manner. The domain has various applications in tasks like machine translation, Speech to text and vice versa translation, sentiment analysis, chatbots and text classification etc. For this project we will be exploring one its very useful application called Topic Modeling. Topic modeling is an application of NLP that helps to identify the main content of the document which could be further used to filter out the important sections quickly and effectively. It is an unsupervised algorithm that used the document corpus matrix to identify the most relevant topic related to the document. Extracting these document topics could be very helpful in automatic labelling and clustering of the documents into major categories on which further analysis can be performed later to generate more insights about the contents of required documents. It is quite different from topic classification technique that is based on supervised learning algorithm.
Jagruti Joshi, Google QUEST Q&A Labeling, August 2020, (Yan Yu, Peng Wang)
Computers are good at answering questions with single, verifiable answers. But humans are often still better at answering questions about opinions, recommendations, or personal experiences. Humans are better at addressing subjective questions that require a deeper, multidimensional understanding of context - something computers are not trained to do well yet. Questions can take many forms - some have multi-sentence elaborations while others may be simple curiosity or a fully developed problem. They can have multiple intents or seek advice and opinions. Some may be helpful and others interesting. Some are simple right or wrong.
Unfortunately, it is hard to build better subjective question-answering algorithms because of a lack of data and predictive models. That is why the CrowdSource team at Google Research, a group dedicated to advancing Natural Language Processing (NLP) and other types of Machine Learning (ML) science via crowdsourcing, has collected data on a number of these quality scoring aspects.
This project aims to use the new dataset to build predictive algorithms for different subjective aspects of question-answering and improve automated understanding of complex question-answer content. We will be focusing on Bidirectional Encoder Representations from Transformers (BERT) and DistilBERT, a distilled version of BERT that is smaller, faster, cheaper, and lighter.
Sankirna Joshi, Multilingual Toxic Comment Classification, August 2020, (Yan Yu, Peng Wang)
Conversational toxicity is deﬁned as anything rude, disrespectful or otherwise likely to make someone leave a discussion. Even a single toxic comment can derail an entire conversation and the fear of such comments often hinders people from sharing their opinions, thereby reducing the quality of an online discourse. The Conversation AI team, a research group founded by Jigsaw and Google builds the technology to protect such voices. The goal of this project will be to study and apply machine learning techniques to identify whether a comment is toxic or not. Given, the multilingual nature of the internet, we will expand and check our model’s performance on text from a different language. By identifying the toxicity in conversations, we can deter users from posting such messages, encourage healthier conversations and have a safer, more collaborative internet across the globe.
Sahil Kala, Office of Quality and Patient Safety Division of Information and Statistics Original Source Data Submitter Project (OSDS), August 2020, (Liwei Chen, Kenneth Goolsby)
New York State enacted legislation in 2011 that allowed for the creation of an All Payer Database (APD). The complexities of the health care system and the lack of comparative information about how services are accessed, provided, and paid for were the driving force behind this legislation. The goal of the APD is to serve as a key data and analytical resource for supporting policy makers and researchers.
The current APD- OSDS project I am working is on is directed towards building a new age system which is planned to replace the current legacy system which was based on IBM data integration tool. The project is focused on using latest technologies like Informatica PowerCenter for Data Wrangling, SQL and Tableau for data analysis. Project is planned to go in phase 2 in mid-2021 to be considered to undergo statistical analysis by using Machine Learning for predictive analysis.
The APD is creating new capability within the Department, including more advanced and comprehensive analytics to support decision making, policy development, and research, while enhancing data security by protecting patient privacy through encryption and de-identification of potentially identifying information.
With the APD, the Department will have a comprehensive picture of the health care being provided to New Yorkers by supporting consumer transparency needs on quality, safety, and costs of care. The systematic integration of data technology and weaving of the previously fragmented sources of data will create a key resource to support data analyses that address health care trends, needs, improvements, and opportunities.
Surabhi Srinivasa Kamath, HR Analytics – Employee Attrition Prediction, August 2020, (Peng Wang, Dungang Liu)
Predicting attrition, whether an employee will leave the job or not, has become an important concern for the institutions in recent days, owing to several reasons. In this project, we will work on a dataset from Kaggle in R to explore the factors that are related to employee attrition through Exploratory Data Analysis and build statistical models that could be used to predict whether an employee would leave the company or not. Finally, we will explore different sampling techniques and dimension reduction technique to find the important factors.
Sandeep Kavadi, Analytical Approach to designing Financial Hardship Programs for Consumer Loan Products, August 2020, (Michael Fry, Siddharth Krishnamurthi)
In this paper, we look at design of financial hardship offers for various consumer loan products. Designing a financial hardship offer involves changing certain terms of an existing loan contract to make debt payments more affordable to borrowers in financial distress. There is a delicate balance of risk and reward involved while changing the terms of a consumer loan. Hence, we use an analytical approach to balance these two quantities. We first quantify the risk using the expected loss. The reward is quantified using the net present value of the expected income cashflows. The probability of default is modelled as a logistic curve whose parameters are determined based on historical data. The resulting objective function is a non-linear function of the decision variables. The ‘near optimal’ solutions are arrived at using the Solver function in MS Excel which uses evolutionary solutions method to solve non-smooth optimization problems.
Digvijay A Kawale, Detection of Disease Severity in Breast Cancer Cells, August 2020 (Yichen Qin, Dungang Liu)
Goal and Background: The Breast Cancer Wisconsin (Diagnostic) data set contains the information about the features that are computed from a digitized image of a fine needle aspirate of a breast mass. Feature variables describe characteristics of the cell nuclei present in the image. The data set contains 31 variables, one of them is Diagnosis type of the breast mass classifying them into Benign and Malignant type.
The aim of the study is to build a best model using machine learning techniques like Logistic Regression, Decision Trees and Random Forest that uses the feature variables and predicts the Diagnosis type which would help the Breast Cancer Patients to identify malignancy in the early stages of tumor.
Approach: We will be randomly selecting 80% of the data points from our data set as in-sample data for the modeling purpose and the remaining 20% will be used as out of sample for model evaluation and performance. The seed set for the random sampling of data is 13437586.
We will start with fitting the best logistic regression model using the Exploratory Data Analysis and variable selection techniques like Stepwise variable selection method. After fitting the logistic regression model, we will move to the tress approach for the model building. Starting from classification tress and to more complex techniques like random forests. The model performances will be evaluated based on the Out-of-sample predictions and a final best model will be selected.
Major findings: It was found that as we move from simple models like Logistic Regression and Decision Trees to the more complex models like Random Forests the prediction goes on improving reducing but we lose the interpretability. Depending upon our goal of study i.e. interpretation or prediction we should choose the right model among these. As in our case prediction is our major concern, the random forest model was chosen as it had the best prediction for the Diagnosis of breast cancer cells.
Mohammad Zain Khaishagi, Unsupervised Segmentation of Video Gamers, August 2020 (Yan Yu, Edward Winkofsky)
Unsupervised learning has been the go to choice for segmenting data when labels are not readily available or are expensive to get. Unsupervised learning uses machine learning algorithms to divide the data in separate clusters. There are a number of machine learning methods that can accomplish this, such as Hierarchical Clustering, K Means, DBSCAN, Expectation Maximisation Clustering etc. While there are a large number of methods available, not all of them are applicable to categorical data. Further, some methods require an input for the number of clusters, while other methods automatically find the optimal number of clusters. In the field of marketing, finding the right target audience is a crucial step because of cost constraints and efficacy of marketing campaigns. If the right message is sent to the right group, it can help increase customer engagement and help generate higher profits at a lower cost.
In this project, the goal is to find a segmentation of video gamers such that they have distinct qualities. Various unsupervised clustering algorithms are applied to the categorical data. A comparison is made using visual techniques such as Silhouette plots, Elbow plots, Scree plots and PCA Plots.
Sahit Koganti, A Study of Phase Change Materials Using Statistical Inference and Machine Learning, August 2020, (Dungang Liu, Gayatri Perlin)
This project is aimed at applying data science and machine learning methods to study the effects of elemental composition on the performance of phase change materials (PCM). This special class of materials is actively being pursued in electronics and optoelectronics research for the realization of cutting-edge data storage and information processing technologies. We have tried to build a statistical inference method to identify highly desired and an active area of combinations of primary elements and dopants. In our analysis, we chose the primary elements to be Antimony (Sb), Germanium (Ge), Tellurium (Te) and the dopants for these combinations of primary elements are Ti, Bi, BiN, Mo, N, Sc, Al, AlSc, SiC, In, C, Si, SiN, O, W, Se, Er, Gd, Sn. We have extracted the independent and the dependent properties of these alloys from various published papers and have built a SQL database. Using these parameters, data pre-processing analysis (such as outlier analysis, multi-correlation analysis) and EDA analysis are done to understand the data distribution better. To conclude, we have performed a clustering analysis based on the dependent parameters to understand the influence of primary elements and dopants. Implementation of both K-means and DBSCAN methods has been demonstrated and well-defined clusters explained. These clusters explain to us how the primary elements and dopants influence the activation energy and other dependent parameters of the crystalline, amorphous and the transition phases of these PCM alloys.
Ankit Kumar, Understanding Non Personal Promotions activity during COVID-19 and evaluating ThoughtSpot vs Qlik Sense, August 2020 (Michael Fry, Inder Rishi Kochar)
Pharmaceutical industries market their products to physicians through detailing, wherein a sales representative goes to the physicians to talk about the drug and provide free samples for trial purposes. During COVID-19 pandemic, the sales representatives cannot physically go to the physician’s office for detailing. Thus, Non Personal Promotions (NPP) becomes even more important.
In this project, we evaluate the trend of Non Personal Promotion activities (clicks and impressions) during COVID-19. We examine which brands, vendors, vendor products, and DMAs were the key drivers for increases and decreases of NPP during COVID-19 pandemic by building four dashboards in ThoughtSpot.
We have also done an in-depth comparison of ThoughtSpot (an AI-driven search based visualization platform) and Qlik Sense (Novartis Oncology’s current software for reporting). Based on this comparison, we have provided a suggestion about whether or not to invest in ThoughtSpot for the future.
An important insight from our dashboards was that Paid Social channel contributed the most to the increase in clicks and impressions from Feb-Mar’20. This may be because more ads were shown in Paid Social channel or physicians preferred Social channel over Search and Display.
The team decided not to invest in ThoughtSpot this year because Qlik is more suited to its needs based on the existing dashboards and anticipated future needs.
Priya Kumari, Consumer Complaints Classification using Traditional Machine Learning and Deep Learning Models, August 2020, (Peng Wang, Yan Yu)
Unstructured text data is everywhere on internet in the form of emails, chats, social media posts, complaint logs, and survey. Extracting texts and classifying them can generate a lot of useful insights, which can be used by businesses to enhance decision-making. Text classification is the process of categorizing text into different predefined classes. By using Natural Language Processing (NLP), text classifiers can automatically analyze text and then assign a set of predefined tags or categories based on its content. Lately, deep learning approaches are achieving better results compared to previous machine learning algorithms on tasks like image classification, natural language processing, face recognition, etc. The success of these deep learning algorithms relies on their capacity to model complex and non-linear relationships within the data. This study would cover supervised learning models and deep learning models for multi-class text classification and would investigate which methods are best suited to solve it. The classifier assumes that each new complaint is assigned to one and only one category.
Heng Li, Forecasting Stock Returns Using Machine Learning Methods, August 2020 (Yan Yu, Denise White)
Forecasting stock return is an important topic in the finance industry. However, the stock market has high volatility which makes the price movements hard to be predicted. Eugene Fama and Kenneth French introduced the Fama-French three-factor model in their research paper Common Risk Factors in the Returns on Stocks and Bonds (1993). The traditional Fama-French three-factor model applied the conventional multiple linear regression model, which is still powerful in evaluating stocks and comparing investment results when stocks are held for different periods. However, in recent years, machine learning methods are taking advantage of calculating speed and forecast accuracy. Therefore, in this project, we will evaluate the model performance for both traditional linear models and machine learning models.
In this project, we applied multiple linear regression, univariate linear regression, random forest, XGBoost, and Artificial Neural Network, models. All models selected Market Excess Return (Mkt.RF) as the most important factor, followed by SMB then HML. However, machine learning methods are not able to outperform linear models in terms of output accuracy. We will in the end, briefly discuss the possible reasons and project limitations.
Komal Mahajan, Airline Portfolio Analysis: Selecting a profitable airline amidst the COVID-19 pandemic, August 2020, (Yan Yu, Andrew Harrison)
The coronavirus COVID-19 pandemic situation is unprecedented and catastrophic and since its inception in China last year, the anticipation regarding its impact and cure is ineffective. This virus has put a lot of things on hold, leading to lockdown and complete shutdowns in most of the countries for at least a month. The ramifications of this virus other than human casualties majorly also involve slowdown of the world economy affecting every industry’s operation and their stock prices. Time-series forecasting is one of the most encountered applications in the Data world. The company’s financial data ( stock prices, revenues, etc. ) is collected at regular intervals and different scales such as daily, weekly, seasonally, and yearly, along with an overall trend.
Modeling a time series and predicting future values is an important skill. One simple but powerful method for analyzing and predicting a time series is the additive model. For our study, we have considered Airline industry performance amidst the pandemic and have built different additive models for the time-series data using the Prophet package developed by Facebook for time series forecasting. As our study captures the impact of Covid-19 on the airline industry, so we have selected the model containing data points from February to May 2020, without splitting further in training and test records. It gave the lowest MAPE and MAE among the other additive models we built.
Tanya Malaiya, Improving Affirmative Action, August 2020, (Peng Wang, Liwei Chen)
The data for this project has been provided by the Office of Equal Opportunity and Access (OEOA) at the University of Cincinnati. The OEOA is responsible for monitoring and auditing the workforce activities taking place across the university to ensure that they are compliant with the Affirmative Action Plan.
This project aims to analyze 5 years of Applicant Flow Logs describing the candidates for every position that the University hired in this time. This data includes information about the candidates regarding their status of 2 protected classes :
- Protected Veterans
- People with Disabilities
Currently, the proportion of employees belonging to these protected classes in the University of Cincinnati are significantly lower across most job groups and business units, compared to the proportions in relevant pools provided by the U.S. Department of Labor. By analyzing the given data, this project aims to develop a strategic action plan for improving the representation of these protected groups by understanding where in the hiring process (recruitment, interviews, selection) are barriers present for such groups.
Vipul Mayank, Instacart Market Basket Analysis, August 2020, (Yan Yu, Liwei Chen)
Whether you shop from meticulously planned grocery lists or let whimsy guide your grazing, our unique food rituals define who we are. Instacart, a grocery ordering and delivery app, aims to make it easy to fill your refrigerator and pantry with your personal favourites and staples when you need them. After selecting products through the Instacart app, personal shoppers review your order and do the in-store shopping and delivery for you. Instacart’s data science team plays a big part in providing this delightful shopping experience. Currently they use transactional data to develop models that predict which products a user will buy again, try for the first time, or add to their cart next during a session. Recently, Instacart open sourced this data - see their blog post on 3 Million Instacart Orders, Open Sourced.
I shall be using association rule mining techniques to figure out and obtain the following results for the business:
- Cross Selling: Offer the associated item when the customer buys any item from the store.
- Product Placement: Items that are associated (Bread and Butter, Tissue and Cold Medicine, Potato Chips and Beer) can be placed next to each other. If the customers see them, it has higher probability that they will purchase them together.
- Affinity Promotion: Design the promotional events based on associated products to enhance the business.
Hridhay Mehta, Improving User Experience for IT Services, August 2020, (Michael Fry, Vikas Babbar)
A major responsibility of IT Teams is to not only provide users with faster service but also provide a positive experience during the whole engagement. The objective of this project is to improve user experience while availing IT services for the employees across all locations of the company. We aim to reduce the time to resolution of tickets and increase customer satisfaction.
The first part of the project focuses on predicting ticket types for users that engage IT support using emails. The email text data is analyzed using natural language processing techniques and then using machine learning algorithms, segregated into the correct ticket type. This automatic classification eliminates the manual effort of examining each ticket and then routing it correctly, thus avoiding more than 75% conversions between ticket types as well as reducing the resolution time for each ticket.
The second part is targeted at creating a personalized experience by using personas for all the IT service users to better understand their behaviors and addressing their needs based on the insights discovered. The users are clustered together based on dimensions such as channel of approach, ticket categories and the ticket impact using K-Prototype algorithm. This segregation will provide insights into what to target first and what kind of recommendations can be given to help improve the experience for certain users.
Plash Monga, An Analysis of the Customer Churn in Telecom Industry, August 2020, (Dungang Liu, Charles Sox)
The biggest problem a company faces is of Churned Customers. Churning is a term used in this industry to describe whether the consumer or the user is going to continue the services with the company any further or not. By being aware of and monitoring churn rate, companies are equipped to determine their customer retention success rates and identify strategies for improvement. In this project, we will work on customer churn dataset of a telecom industry and will use different machine learning models to understand the precise customer behaviors and attributes which signal the risk and timing of customer churn. After collecting 7000 data points related to telecom industry, a rule-based quality-control method is designed to decrease human error in predicting customer churn. After examining the results from different machine learning models, we conclude that the results using XGBoost model are promising: we achieve an accuracy rate of 81.5%.
Anudeep Mukka, Prediction of Adult Income Class, August 2020 (Peng Wang, Dungang Liu)
There is a growing economic inequality among individuals across the world which has been a concern for various governments. Many people consider their income information private and would be hesitant to share the information. Predicting an individual income based on their demographic attributes would be helpful in planning and allocating the resources for upliftment of the poor and mitigating the economic gap. This would also help validating the income declared by the individuals to the governments and identifying individuals evading taxes.
The income prediction has also been an area of interest for many companies as this information would enable them to achieve greater understanding of consumer and market behavior. The companies can come up with target programs and apps to specific income groups. This will also help the companies price the product accurately and drive the sales.
This report “Prediction of Adult Census Income Class” contains analysis of Census Income which contains attributes of various individuals to predict if an individual earns more than 50k dollars per year or not. Using these attributes, a comprehensive exploratory data analysis is done to understand what features drives the income level of an individual. Feature selection of the variables is done using AIC, BIC, and LASSO variable It also highlights various feature engineering and data cleaning tasks performed to improve model performance. It finally compares performance of various machine learning models in classifying the individual income level and impact of each predictor on the response variable. Various metrics such as Accuracy, AUC, Recall, Precision, and f-1 score is used to evaluate model performance.
Pravallika Mulukuri, Plant Pathology: Identification of category of foliar disease in Apple trees, August 2020 (Yan Yu, Peng Wang)
Agriculture is the main economic resource in most of the developing and under-developed countries. It is crucial in these countries to have disease resistant crops to progress the economy. Traditional disease identification methods like human vision is time consuming and requires lot of human resource. Hence computer vision would provide more time – efficient methods to identify diseased crops.
In this project, the power of deep learning is used to build a predictive model to identify foliar disease in apple trees. The dataset used in analysis consists of images of apple tree leaves in various sizes, shapes, and color. A very deep model is developed to classify if a leaf is healthy, rusted, scabbed, or has multiple diseases. The developed model had an in-sample prediction accuracy as 100% and out-of-sample prediction accuracy as 91.5%.
Meenal Narsignhani, Customer Retention Analysis, August 2020, (Peng Wang, Rossana Bandyopadhyay)
About at least 40% of U.S. adults do not have the financial resources to cover a $400 emergency. That eye-opening statistic helps explain why so many American households count on Axcess Financial to get financial solutions. Headquartered in Cincinnati, Axcess has, in 20 years, grown to nearly 1,000 retail stores across 24 states and has serviced over 50 million loans. It provides customers with financial solutions in form of variety of loan products that can be acquired via two primary channels – Retail Stores and Online.
In these extraordinary situations of crisis, Axcess has witnessed a substantial drop in the overall number of loan transactions. Acquiring new customers as well as retaining the existing customers is quite challenging in the current scenario. As retaining existing customers is comparatively cheaper than acquiring new ones, the team wants to utilize this opportunity to engage with the existing customers in order to better the retention rates. Since Retail Installment loan products are the major revenue generating source, the team wants to particularly focus on customers who have opted for retail installment loan once during their tenure at Axcess.
In this project, an extended list of factors influencing a customer to re-loan or re-finance were identified from a comprehensive data mart, and a feature engineering process resulted in a consolidated analytical dataset to be used by the extended analytical team. Longitudinal analysis of loan purchase history, demographics, delinquency rate and credit scores helped create insights and actionable recommendations. Retention models will be implemented that will help in identifying customers that are most likely to re-loan or re-finance with Axcess and based on which customized targeting strategies would be devised.
Leila Ouellaj, Google Store Customer Revenue Prediction, August 2020, (Yichen Qin, Edward Winkofsky)
This capstone will try to answer the way companies can allocate better their marketing budgets. There’s an 80/20 rule that states that only a small percentage of customers produce the largest part of a business’s revenue, this pushes marketing team to think carefully before allocating budgets. This project is using a dataset from Kaggle from a Google Merchandise Store to predict revenue per customer in order to help companies make better use of their marketing budgets. The final product will be a prediction of the natural log of the sum of all transactions per user. Exploratory Data Analysis will be performed first before using different models to predict the revenue: GLMNET, ARIMA, Linear Mixed Model, XGB.
Priyanka Pavithran, Blindness Detection in Diabetic patients – using Deep Learning, August 2020, (Yan Yu, Liwei Chen)
Millions of people suffer from diabetic retinopathy, the leading cause of blindness among working aged adults. It is a diabetes complication that affects the eyes. It is caused by damage to the blood vessels of the light-sensitive tissue at the back of the eye (retina).
Many organizations in India hope to detect and prevent this disease among people living in rural areas where medical screening is difficult to conduct. Diabetic retinopathy affects up to 80 percent of those who have had diabetes for 20 years or more. Diabetic retinopathy often has no early warning signs. Retinal (fundus) photography with manual interpretation is a widely accepted screening tool for diabetic retinopathy, with performance that can exceed that of in-person dilated eye examinations.
Currently, technicians travel to these rural areas to capture images and then rely on highly trained doctors to review the images and provide diagnosis. Their goal is to scale their efforts through technology; to gain the ability to automatically screen images for disease and provide information on how severe the condition may be.
Shrinidhi Purohit, Forecasting Sales with Machine Learning, August 2020 (Peng Wang, Dungang Liu)
Forecasting sales has become one of the major applications of Machine Learning, which helps the business take an informed decision. The project which I am undertaking will forecast the sales for Walmart using various Machine Learning Algorithms.
The project aims for forecasting the sales of products sold by Walmart in their stores in three states – California (CA), Texas (TX), Wisconsin (WI). The dataset provided by Walmart, involves the unit sales of various products sold organized in the form of grouped time series. The products are classified in three categories- Hobbies, Food and Household. The products are sold across ten stores located in CA, TX, WI. The data ranges from 2011-01-29 to 2016-06-19.
Sumukh Purohit, Predict housing sales prices using Advance Regression Technique, August 2020, (Peng Wang, Dungang Liu)
The project aims to predict the final price of houses in residential areas in Ames, Iowa. The datasets consist of 2,930 observations and 79 explanatory variables (23 nominal, 23 ordinal, 14 discrete and 20 continuous). Dataset can be considered as a modernized and expanded version of Boston Housing dataset which was used to build several regression models during Data Mining class. The main goals of the project are to study various methods of feature engineering to determine the factors which affect the house prices and to implement and study several advance regression algorithms to predict the housing prices. The project will also serve as a part of a Kaggle competition wherein the feature engineering and model building will be done on training data consisting of 1465 observations and model performance will be evaluated on testing data consisting of remaining 1465 observations. The Root-Mean-Squared-Error between the logarithm of the predicted value and the logarithm of the observed value of housing price will be used to evaluate the models. The logarithm of housing price will be used to normalize the error in predicting expensive houses and predicting cheap houses.
Aninthan Ramaswamy, Trade Architecture Transformation, August 2020 (Dungang Liu, Chetan Dolzake)
Tiger Analytics is a consulting firm that provides analytics services to other major businesses. During the internship, the task was to assist a major global manufacturer of consumer goods with re-designing their trade investment architecture. The manufacturer partners with multiple retailers, negotiating a pricing and promotional plan for a product with the result being a business plan, that lists agreed upon decision consensus on pricing, promotion, and distribution of the SKUs (Joint Business Plan or JBP). To facilitate these promotional activities, the manufacturer invests millions of dollars, which is driven by strategic negotiations with the retailers. Lately, this trade investment allocation has been decided more towards a retailers’ market power and lesser on their decisions that were agreed in the JBP. The manufacturer wanted to create a process that tracks KPIs of performance, modelled the outcomes and achieve an optimized trade rate for each retailer based on their decisions. The KPIs contribution towards the trade rate was calculated using a sigmoid transformation model, working on some pre-determined business constraints. The optimized trade payout generated in the process ensures that the investment encourages the decisions taken by the retailers that favors the manufactures, while not penalizing poor outcomes beyond what is necessary. The framework also generates a potential $Y million in investment savings over the next 5 years, also freeing up capital for other marketing activities. The solution includes tracking data from multiple external sources, creating and modeling KPIs using a data harmonization framework, designing an excel tool that generates an optimized investment scenario and designing a Power BI dashboard to provide quick insights on historical and future looking trade performance. This framework has been implemented on the client’s environment, that the team can use for improving their trade investment architecture. This would ensure that the trade investment planning is shifted from a strategic process to a more data-backed and performance-based process.
Vidhi Rathod, Sentiment Analysis & Recommender system for Amazon’s Utility Product line, August 2020 (Yan Yu, Peng Wang)
How important are customer reviews to shoppers? Very important, as it turns out. The fact is, 90% of consumers read online reviews before visiting a business. And 88% of consumers trust online reviews as much as personal recommendations.
This is even more prominent in the e-commerce industry. Online stores have millions of products available in their catalogs. Sentiment analysis is the interpretation and classification of emotions (positive, negative and neutral) within text data using text analysis techniques. Sentiment analysis tools allow businesses to identify customer sentiment toward products, brands or services in online feedback.
On contrary, Finding the right product becomes difficult for customers because of ‘Information overload’. Users get confused and this puts a cognitive overload on the user in choosing a product. Recommender systems help customers by suggesting probable list of products from which they can easily select the right one. They make customers aware of new and/or similar products available for purchase by providing comparable costs, features, delivery times etc.
Recommender systems have become an integral part of e-commerce sites and other businesses like social networking, movie/music rendering sites. They have a huge impact on the revenue earned by these businesses & also benefit users by reducing the cognitive load of searching and sifting through an overload of data. Recommender systems personalize customer experience by understanding their usage of the system and recommending items they would find useful.
You might have come across examples like below for amazon recommendation system. This project aims at exploring the reviews written by customers on Utility products line for an e-commerce titan- Amazon.
Here, Natural Language Processing is used to analyze the polarity of reviews and a Recommender system for products is built using the past reviews.
Kamaleshwar Ravichandran, DC-Taxi Driver Schedule Optimization, August 2020, (Leonardo Lozano, Eric Webb)
Revenue earned by the taxi drivers is highly dependent on the route, day, and time they are driving. The traffic in a route varies during different times of the day, also varies depending on the day of the week, as few routes may have high traffic during weekdays, few may have high traffic during weekends. Thus, if a driver chooses an optimal route, day, and time to drive, they can earn more revenue. To address this problem, in this paper we aim to formulate an optimization model using mixed integer programming. The driver can feed the region, day, and time they are available in a week to drive. This model utilizes the past taxi trip records to arrive at an optimal driving schedule for the week. Further, we perform Monte Carlo simulation on the revenue calculation by varying the probability of getting a new trip, which gives the optimal total revenue a driver can make in a week.
Eliza Redwine, Modeling voter turnout and party preference in Ohio’s 1st congressional district, August 2020, (Yan Yu, Dungang Liu)
Identifying who will vote and the party preference of these voters is key to winning political races, particularly in close races. In this project models were developed to determine both a voter’s likelihood of voting in a general election and that voter’s likelihood of voting for the Democratic party for registered voters in Hamilton and Warren counties in Ohio. Models were built using voter registration and history and demographic information from the U.S. Census and Social Security Administration. The performance of CART, Elastic Net, and Random Forest models were assessed. Random Forest models proved to be the most accurate models. Accuracy of voter turnout models was greatly increased by incorporating voter turnout history into the Random Forest model by using an iterative approach, successively fitting models to subsets of voters who had different lengths of voting history.
Pooja Sahare, COVID-19 Twitter Sentiment Analysis, August 2020, (Yan Yu, Dungang Liu)
World Health Organization declared COVID-19 outbreak as a pandemic on 11th March 2020. The world saw 2020 in a different light shrouded by Covid-19. It managed to not only grab the headlines everyday but also dictate and disrupt our daily lives until this very day. Owing to its deep-rooted and widespread impact, the response around the world has been diverse. Twitter is a real time social media platform where people can voice their opinions freely and is one of the most popular media worldwide. The aim of twitter analysis is to capture pulse of the people during this quarantine majorly positive or negative. Help, angry, fearful, sadness, anxiety, grateful, hopeful are some of the expected reactions. The study also aims to detect the above emotions from the gathered tweets using machine learning techniques.
Sagar Sahoo, Natural Language Processing in Free-Text Notes, August 2020, (Michael Fry, Denise White)
50,000 employees of Boehringer Ingelheim create value through innovation with a clear goal: to provide better health outcomes and improve the lives of both humans and animals.
Currently, the next-best action planning is driven by analyzing the free text across multiple departments such as Oncology & Respiratory. With thousands of insights in Oncology alone, it becomes tough for business teams to analyze every feedback of physicians regarding the drugs. Use cases such as auto-tagging of the compound and tumor types to free text, summarization of insights, identifying hot/trending/emerging topics would assist business teams to derive hidden insights.
This project uses natural language processing to design a “Multi Labeled Classification” predictive model using deep learning (Keras/Tensorflow) and using this model to predict tumor type from the free text. The results showed that using recurrent neural networks with pre-trained word embeddings (gloVe) can effectively learn better compared to the traditional bag of words approach given enough data. Furthermore, this project required aggregating monthly free text and generating insights (based on the similarity of text) using Bidirectional Encoder Representations from Transformers (BERT) summarizer and developed a platform using Tableau to present a summary of the insights, significant bi-grams/trigrams (based on count), unsupervised sentiment analysis using Text-BLOB to business teams. This should allow for faster decision-making abilities leading to more dynamic and customer-specific processes.
Vivek Sahoo, Dashboards as a Product Offering & for tracking Product Usage, August 2020, (Michael Fry, Christy Foxbower)
VNDLY is a leading provider of cloud-based contingent workforce-management systems. Launched in 2017, it has grown quickly with multiple Fortune 500 clients and is backed by investments of over $57 million. In its efforts to disrupt the vendor-management space, VNDLY plans to provide dashboards as a product offering to its clients to aid their decision making and better manage their non-employee workforce needs. Also, being a product-oriented organization, VNDLY strives to leverage analytical dashboards to make key product related decisions. This capstone involves dashboard development to refine requirements, build prototypes using Tableau and ensure data visualization best practices are followed in the product offering for our clients. Analytical dashboards are created using Google Data Studio by sourcing product usage data from Google Analytics. These dashboards follow design principles for effective data visualizations and hence aid the decision making around product priorities for internal stakeholders at VNDLY.
Mohammed Nifaullah Sailappai, Sentiment Classification & NLP Analysis on Amazon Fine Food Reviews Dataset, August 2020, (Yichen Qin, Gowtham Atluri)
This project is a Natural Language Processing Analysis (NLP) on the Amazon Fine Food Reviews dataset. The dataset contains 568454 reviews of fine foods from Amazon spanning a period of more than 10 years. The dataset includes product and user information, ratings, and a plain text review in a tabular format, in which each row is a singular and separate review in itself. Initially we preprocessed data to convert the ratings into positive and negative sentiments. Then we structured the data into Keras’s Neural Network feedable format, further we generated the embedding layer using the Gensim library in python. After a process of iterative improvement, we then finalized a sentiment classification model. Finally we analyzed the performance of model on incorrectly classified reviews to understand the nature and pattern involved in such reviews. The final model selected was a Recurrent Neural Network with LSTM cells as the main building block. The final model gave us a training and test accuracy of 90%, upon deeper analysis it was found that the actual accuracy should be greater than 90%.
Matteo Salerno, Analysis of different approaches to treat time series instability, August 2020, (Jeffrey Mills, Yan Yu)
This work compares the frequentist and Bayesian approaches to the treatment of time series instabilities such as structural breaks and unit roots using AR(1) modeling (autoregressive of order 1). The two approaches were evaluated using ad hoc generated time series that had breaks and regime switching between I(1) and I(0) states. The breaks in these time series were treated as having unknown positions. Once the breaks positions were identified, the time series were modelled, and the results compared. The structural breaks have been searched with a practitioner approach based on the time series modeling minimal regression RSS (Residual sum of squares) which is described in this paper (hereinafter referred to as “Minimum RSS search”). The detected breaks positions were validated with the QLR test (Quandt Likelihood Ratio). The BIC (Bayesian Information Criterion) has been used to compare the fit among models. The conclusion of this work is that the Bayesian approach provided a better fit than the frequentist one in the cases analyzed.
Onkar Samant, Duplicate Questions Identification on Quora, August 2020, (Peng Wang, Denise White)
The project explores automated prediction of duplicate questions given two questions from the Quora platform through predictive models. Different Natural Language Processing techniques are extensively explored to extract features from the raw text and build models for predictions. The modeling work majorly involves the following two types of approaches:
- Classical Text Mining Approach: Character counts and TF-IDF vectors along with cosine similarity are used as features extracted from the raw text. Furthermore, Logistic Regression, Random Forest, and XGBoost are tried for prediction using these features.
- Advanced Techniques: Various Neural Network Architectures are tried with word embeddings created from questions’ text
The dataset contains 404,290 records and 95% of it is used for training and 5% for testing. Results from the approaches defined above are tabulated and compared based on log loss and accuracy. The results from the word embedding approaches are found to be very promising and can provide a scalable solution for this task.
Nikita Sanke, Sentiment Analysis on Women’s Customer Reviews in Ecommerce Industry, August 2020, (Peng Wang, Liwei Chen)
61% of customers read online reviews before making a purchase decision, and they are now essential for e-commerce sites. Understanding the sentiments of customers is of utmost importance today. By analysing users reviews, a company can be aware of how its users feel. For brands who are trying to actively engage with their users, it is important to detect any negative sentiment. Hence, Natural Language Processing applications like sentiment analysis help companies to improve the online ecommerce experience for their users and also to extract insights from insights from unstructured information such as customer reviews.
Sentiment analysis, which also includes text polarity detection apart from feature extraction provides valuable insights to firms to understand how buyers actually feel about the products they bought, and do they recommend it to others. It is particularly useful in datasets as this, as it can be used to extract.
Kaustubh Saraf, Churn Analysis: Identifying the quotes that are likely to convert into sales, August 2020 (Michael Fry, Andrew Harrison)
With the growth of analytics, it has become more important for businesses to use analytical tools to gain an upper hand over the competitors. Analytics can be used across different verticals of a business such as manufacturing, financial planning, and marketing. Marketing is an important aspect of any business with many ways of marketing a product. Therefore, it is important to select the right way of marketing a product. One of the important factors of any marketing campaign is the selection of the target group. Using analytics to select the right set of customers within a target group helps businesses optimize costs and focus on the right set of customers. Another important business area to explore is analyzing the shifts in the buying patterns of the customers.
In this study, we will be analyzing the transactional data of a steel manufacturing company to predict the conversion of a quote that is sent to its clients. Some important aspects of the study include the frequency of conversations, the geographical area of the clients, the functional status of the clients, the response time for the first conversation and the average response time for conversations. We also try to bucket customers based on the transactional data and predict the number of quotes that get converted into sales based on factors such as the customer group, month of the conversation and geography.
Somil Saxena, Telecom Company Customer Churn, August 2020, (Yan Yu, Dungang Liu)
With the rapid development of telecommunication industry, the service providers are inclined more towards expansion of the subscriber base. To meet the need of surviving in the competitive environment, the retention of existing customers has become a huge challenge. Firms are directing more effort into retaining existing customers than to attracting new ones. To achieve this, customers likely to defect need to be identified so that they can be approached with tailored incentives or other bespoke retention offers. Such strategies call for predictive models capable of identifying customers with higher probabilities of defecting in the relatively near future.
In this study, an in-depth customer attrition analysis was conducted which was followed by building a data model that predicted whether a customer would churn or not. Different supervised learning techniques such Decision Tree, Support Vector Machines, Logistic Regression, Random Forest were utilized to predict the categorical target variable ‘churn label’. Since the distribution of churning and non-churning customers was not balanced, accuracy was not used as a performance metric. Instead, model comparison was done on ROC AUC score. Random Forest gave the best performance with an AUC score of 86%.
Tanu Seth, American Sign Language Hand Gesture Recognition: Application of different Machine Learning Algorithms for Image Classification, August 2020, (Yan Yu, Liwei Chen)
American Sign Language (ASL) is a visual language that serves as a principal sign language for the deaf communities in the United States and in many parts of Canada. Sign Language Gesture Recognition is an open problem in the field of machine vision and has many applications with the scope of improving human-computer interaction. The project will aim at creating a translator that utilizes and compares various Machine Learning algorithms based on model accuracy to predict alphabets corresponding to static hand gestures of American Sign Language. The data in this project is collected from Kaggle. It consists of 44200 images (28 x 28-pixel data) of American Sign Language hand gestures corresponding to alphabets ranging from A to Z. Each row consists of 785 dimensions, the first dimension is the label which corresponds to the index of the alphabet and the remaining 784 values are the grayscale pixel values (a number from 0 to 255). Among the traditional classifiers, Random Forest Classifier performed better and was able to recognize the hand gestures with 93.37% accuracy. The Convolutional Neural Network developed using the Keras library in python recognized alphabets corresponding to hand gesture with 98.3% accuracy. The accuracy achieved could change significantly if new objects are included in the background. With higher computational power and hyper tuning of parameters, the prediction performance of the algorithms could be improved further.
Sagar Shah, Plastic Cutlery Product Development, August 2020, (Michael Fry, Rakesh Rathore)
TrueChoicePack (TCP) is a private label company and an expert in supplying disposable products across the United States. Our team at TCP is always striving to develop new products for the private labelling customers as well our own e-commerce businesses. I will be presenting my “Plastic Cutlery Product Development” project in this report where I have analyzed the markets for the plastic cutlery, analyzed the supplier bids to determine the best supplier for the product development, developed the stock keeping units for the company retail and the e-commerce markets, determined the appropriate pricing for the retail and e-commerce markets by performing competitive analysis and implementing price-based costing in line with the company’s objectives, developed the content on the product dielines for marketing purposes and designed the product packaging for the retail and e-commerce markets.
This project is divided into various subparts each demanding exploratory data analysis, statistical computing, data munging, analytical dataset creation, and data visualization on multiple datasets to come up with recommendations and communicating results to the senior management. We are expecting to launch this product by August on different e-commerce platforms.
Anjali Shalimar, Movie Recommendation Engine, August 2020, (Peng Wang, Liwei Chen)
Recommendation engines are integral to the ever-increasing need for businesses to further personalize the customer experience. From recommending clothing size to product substitutes, content recommendation plays a vital role in customer engagement. The objective of the analysis is to learn and build a basic movie recommendation engine.
Initially, the analysis would investigate a content-based filtering algorithm. The key idea is to recommend movies that best suit a customer’s prior movie selections. For instance, if you have watched ‘The Avengers’, you would receive movie recommendations with similar plots or characters. In this analysis, a content-based recommendation has been built based on the plot description of a movie. The technique of term frequency – inverse document frequency is used to create keywords across each description and later create a TF-IDF matrix. A cosine similarity score within the available pool of movie keywords is generated to recommend the most similar movies.
A collaborative filtering algorithm is an improvement to the content-based approach as it produces recommendations based on the similarity between users and the movies they have rated. A collaborative filtering algorithm could pose the problem of data sparsity. The challenge of sparsity occurs when we do not have sufficient data points to identify similar users or items. Hence the analysis investigates a singular value decomposition technique to recommend movies. A singular value decomposition technique decomposes a matrix into a product of three component vectors. The key idea is to predict the user-rating for a movie aiming to minimize the RMSE of the rating predictions.
Anupam Shukla, US Airline Tweet Topic Modeling and Sentiment Analysis, August 2020, (Peng Wang, Liwei Chen)
Twitter is one of the popular social networking sites where people express their sentiments about different companies and their products and services. According to Brandwatch stats, 65.8% of US companies with 100+ employees use Twitter for marketing, 80% of Twitter users have mentioned a brand in a tweet and the last two years have seen a 2.5x increase in customer service conversations. Companies can analyze these tweets to understand where they need to improve. But analyzing these large number of tweets manually can be a time taking process. This project attempts to address this issue by employing Natural Language Processing tools like topic modeling and sentiment analysis. A dataset consisting of customer tweets about each major US airline is used for the study. It contains almost 14000 tweets and comes with pre labeled sentiment (positive, negative or neutral) for each tweet. The topic model will help airlines identify frequent topics flyers tweet about and address those areas where the service is not satisfactory. With the classification model, airlines can predict sentiment of future tweets and analyze if the service improvements are actually working or not. Topic modeling will be performed using Gensim library in Python. To build the classification model, machine learning classification algorithms like Logistic Regression with Lasso regularization, Random Forest, Boosting, naïve Bayes classifiers and deep learning algorithms like Recurrent neural network using pretrained GloVe word embedding is used.
Harsh Singal, Python Notebooks for Data Mining Course, August 2020, (Yan Yu, Peng Wang)
In today’s data driven environment, the study of data through big data analytics is very powerful, especially for the purpose of decision making and using data statistically in this data rich environment. Any person who is new to data science or any organization who has started using data science in their day to day operations, need to pick a language at first in which they can analyse the data and a thoughtful way to make that decision. Although there are many languages present, there are mainly two languages commonly used for data science - Python and R. Both have been used successfully in teaching as well as in the professional world and being currently used to make decisions involving big data. Both comprise a large collection of packages for specific tasks and have a growing community that offers support and tutorials online. Since the Data Mining course at University of Cincinnati is heavily R oriented, through this project, I have tried to convert the labs and homework from R to python notebooks for the students interested in doing the coursework in Python as well.
Aditi Singh, Application of Convolution Neural Networks (CNN) in detecting Malaria, August 2020, (Peng Wang, Liwei Chen)
The applications of deep learning have achieved great success in the healthcare industry in recent years. Deep convolution neural networks (CNN) are now widely used in medical imaging diagnosis for various diseases such as pneumonia, Alzheimer’s, cancer, diabetic blindness, etc. One such important application of image-based classification is the diagnosis of malaria.
The project exhaustively explores the CNN architecture that sheds light on the unique feature processing of the images within convolutions that result in a significant improvement in predictive power especially, when compared to traditional classification algorithms like random forest. Using Giemsa stained colored cell images, the analysis attempts to fit the best CNN architecture to classify the red blood cells as infected or not. Different models were developed using both VGG blocks and residual modules. Further, overfitting was addressed using regularization techniques like dropout, l1 & l2 regularization terms, early stopping and data augmentation. The choice of optimization algorithm was also evaluated. Based on the analysis, it was concluded that the model using 3 layers based on VGG block, along with dropout rates, early stopping, l2 regularization term and RMSprop optimization algorithm yielded the best results in terms of model performance on test data.
Ashutosh Singh, Predicting Click-Through in Online Hotel Ranking, August 2020, (Yan Yu, Dungang Liu)
Click-through rate prediction is an essential task in industrial applications, such as online advertising and online bookings. Since the past decade, many traditional machine learning models have been used for this purpose ranging from Logistic and Decision Trees to more advanced ensemble models like Boosting and Bagging. Recently Deep-learning based models have been proposed, which have been pretty impressive in the classification problems involving large data. In this study, an online hotel rankings data is used to test the efficiency of these traditional, ensemble, and deep learning methods in predicting the click-through. The performance of all these models is evaluated both on in-sample and out-of-sample data. The methods used were broadly classified into four major categories – Traditional, Ensemble, Naïve Bayes, and Deep-Learning, and the experiments aimed to find out the best performing model in each of the categories. In the end, Boosting algorithms specifically Gradient Boosting performed best in out-of-sample data. Overall, the majority of the above methods gave good results in terms of accuracy with some exceptions like Bernoulli NB and Sequential Model. Two features namely, Position of Hotel ranking in the search results and the Property location score were identified as the most important based on the feature importance plot of Random Forest and Gradient Boosting Model.
Utkarsh K. Singh, Customer future value modeling for non-contractual businesses – Bayesian approach, August 2020, (Yichen Qin, Dungang Liu)
Estimatingfuturevalueofacustomerisoneofthecorepillarsinmarketingstrategy. Value canbeperceivedeitherbythenetproﬁtorrevenueearnedfromacustomerduringaperiodof deﬁned length in the future. A number of Econometric, Probabilistic and Machine Learning models utilize customer level transactions for this purpose.
The modeling approach explored in this project is one amongst a suite of Bayesian probabilistic models popularly known as the Buy till you die models for estimating customer value. The report discusses the theory and application of a combination of Beta Geometric Negative Binomial Distribution (BG/NBD) model and the Gamma-Gamma submodel for estimating the expected future value of customers for an e-commerce retail business. The BG/NBD model was ﬁrst introduced by Fader, Hardie and Lee in 2004 for predicting expected future transactions and survival probability for customers in a non-contractual setup.
The model is trained over a calibration period of 9 months and the predictions are tested for a holdout period of 4 months. The model performance is evaluated against a simplistic baseline model based on the observed average behavior of an individual. Finally, the model is used to predict “High Future Value” customers and the lift obtained in capturing target customers is reported.
Apoorva Milind Sonavani, Image Caption Generation Using Computer Vision & NLP, August 2020, (Yan Yu, Peng Wang)
Visuals and imagery continue to dominate social and professional interactions globally. With a growing scale, manual efforts are falling short on tracking, identifying, and annotating the prodigious amounts of visual data. With the advent of artificial intelligence, multimedia businesses are able to accelerate the process of image captioning. AI-powered image caption generator employs various artificial intelligence services and technologies like deep neural networks to automate image captioning processes. The image captioning model is an automated tool that generates concise and meaningful captions for prodigious volumes of images efficiently. The dataset used is the COCO Dataset 2014 (Common Objects in Context). COCO is a large-scale object detection, segmentation, and captioning dataset. This version contains images, bounding boxes and labels for the 2014 version. The model employs techniques from computer vision and Natural Language Processing (NLP) to extract comprehensive textual information about the given images. The image caption generator consists of Neural Networks (CNN), Recurrent Neural Networks (RNN), wherein-
- CNNs are deployed for extracting spatial information from the images
- RNNs are harnessed for generating sequential data of words
Bahdanau Attention is used within the encoder-decoder structure of the model, to preserve sequence-to-sequence efficiency.
Ayshwarya Srinivasan, Movie recommendation Engine, August 2020, (Peng Wang, Yichen Qin)
Streaming services such as Netflix, Prime, Hulu are garnering more and more audience each day. With more streaming services than one can keep a count of coming up, families must decide as to which service to subscribe to. Increasingly, the quality of recommendations a service has become pivotal to this decision making. The objective of this project is to recommend movies for a subscriber to watch.
While there are several factors that one could consider while creating a recommendation engine, in this project we are focusing on a few aspects of the user and the movie to provide recommendation. We would be focusing on the movie genre, the tags associated with it, the director and cast of the movie. We will also be focusing on recommending movies to a user based on how close his taste matches with another user. The goal of this project is to provide holistic experience to a user by providing recommendations based on various criteria such as popularity, user-user collaborative filtering and content filtering.
Rajat Srivastava, Feature Based Music Recommendation System, August 2020, (Peng Wang, Liwei Chen)
Music service providers, for personalization of content, rely mostly on the preference of users that are set at the time of account creation. The ones who have user data make use of collaborative filtering and listening patterns. However, a user rarely listens to the same kind of music all the time. The song preferences are largely dependent on the mood of the listener. The mood can be derived, abstractly, from the audio features of the song that user is currently listening to. Over the years, many supervised metric learnings have been applied to this problem in conjunction with collaborative filtering and user preferences. However, if we look at the problem independently, the problem is that of unsupervised distance metric learning. Moreover, number of features range, generally from 10 to 20 and hence a linear distance metric, often, do not give good results. In this paper, we demonstrate a non-linear distance metric derived from the idea of Locally Linear Embeddings (LLE) method of dimensionality reduction. The results are evaluated based on the user feedback collected using web application.
Venkat Sureddi, Movie Recommendation System, August 2020, (Yichen Qin, Liwei Chen)
The one key reason why the recommendation systems have become ubiquitous in the modern world is the enormous options people have on the internet. From fashion to items for daily use to movies, there are a plethora of options for a user surfing the web. It is impossible for any user to choose from that exhaustive list of options. This is where the recommendation systems come into play. A recommendation system employs a statistical algorithm to predict the users’ preference and make suggestions based on those preferences.
Recommendation systems are playing a key role particularly in the entertainment space where there are thousands of movies and series to choose from. For providing the best viewing experience and retaining the users, it is important for the OTT platforms to seamlessly suggest movies to both existing and new users. We built different recommendation systems using the TMDB Movies dataset from MovieLens website.
The three recommendation systems we have built in this project are:
- Simple Recommendation System
- Content Based Recommendation System
- Collaborative Filtering
Ambita Surlekar, Book Recommender System, August 2020, (Peng Wang, Yan Yu)
Recommender systems have become an integral part of many e-commerce companies. From Amazon to Netflix, recommender systems help users to explore items/ songs/ movies which are similar to their tastes. They also have significantly impacted businesses by increasing purchases resulting in increased revenue. This project builds a recommender system from books whose details are stored in the good reads database. Many advances have been made in identifying best algorithms to make these recommendations. This project explores 3 popular ones. Content-based filtering approach uses the book titles and ratings to suggest books to users. In the collaborative filtering (CF) approach, user-based as well as item-based approach have been explored. Finally, I have applied the Singular Value Decomposition (SVD)/ Matrix Completion, which is one of the most popular approaches. I have listed the advantages and disadvantages of each of the recommenders.
Hasnat Shad Tahir, Movie Recommendation Systems, August 2020, (Peng Wang, Dungang Liu)
Today, while surfing/purchasing on the internet we are provided with a lot of choices to choose from, this can be time-consuming and frustrating sometimes. There is a need to filter, prioritize, and efficiently deliver relevant information to alleviate the problem of information overload. With the rapid growth of data collection, we can create/modify more efficient systems by effectively using the collected data. Recommendation Systems are information filtering systems that improve the quality of a search result by increasing its relevancy to the user search history or preferences. At present, almost every big company uses these systems: Amazon uses it to suggest products to customers based on their and other similar customers purchasing habits, Youtube uses it to decide what video to play next. Some music application companies like Spotify depend solely on the effectiveness of its recommender system for its success.
Juan Tan, DrugBank Data Mining – Wrangling & Network Analysis, August 2020, (Leonardo Lozano, Denise White)
In this project, I parse and explore the database downloaded from drugbank website (https://www.drugbank.ca/), which contains plenty of information, including targets, manufacturer, price, monoisotopic mass, metabolism, toxicity, etc of over 13,000 drugs. Drug type, state, price, target action, manufacturer, group, average mass from this database are mined. Then, drugs for Alzheimer’s Disease (AD) are identified. Furthermore, by using the platform of Cytoscape, the drug-target, drug-enzyme, and drug-transporter networks are built and analyzed. Insights into the current drug market, new drug discovery, and drug repurposing for AD are obtained.
Varun Varma, Detecting Fake News and Real News Articles, August 2020, (Yan Yu, Dungang Liu)
Fake news and lies have been there since before the coming of the Internet. The generally acknowledged meaning of Internet fake news is: imaginary articles intentionally manufactured to trick readers. Online networking and media sources distribute counterfeit news to build readership or as a feature of mental fighting. In general, the objective is benefitting through misleading content sources.
Misleading content sources draw clients and allure interest with showy features or plan to click connects to expand promotions incomes. This article examines the pervasiveness of phony news considering the advances in correspondence made conceivable by the rise of person to person communication locales.
The motivation behind the work is to look for an answer that can be used by clients to recognize and sift through locales containing bogus and deluding data. The project is concerned with identifying a solution that could be used to detect and filter out sites containing fake news for purposes of helping users to avoid being lured by clickbait. It is imperative that such solutions are identified as they will prove to be useful to both readers and tech companies involved in the issue. I have tried to build models with different machine learning algorithms to recognize fake posts. The result outcomes show a 99.8% accuracy utilizing a strategic classifier.
Lekshmi Venugopal, Generation of Music using Deep Learning and Recurrent Neural Networks, August 2020, (Peng Wang, Edward Winkofsky)
Traditionally, music was generated by talented artists and was deemed to be a skill owned by a select few who had the sense of creativity and the skill in the area. Nowadays, with the help of advanced technologies, the same can be achieved without human interference. The applications of machine learning and artificial intelligence are diversifying into fields which were considered difficult to be conquered by the mere technicality of machines. Creative fields which require a certain skill set and sense of innovation such as art, literature etc. were thought to be the last which would be dominated by machines. In this project, we attempt to train generative models and use these models to create music. Recurrent Neural Networks (RNN) models based in Long Short Term Memory architecture(LSTM) are used. Data, in the form of ABC format is fed to the model, after which is preprocessed and vectorized into integer format before training the model. Description about the LSTM model architecture and its connections to develop a neural network is also presented in this work. When the model was trained with enough samples, it produced impressive results in generating new samples.
Mudit Verma, Customer Churn Modeling for Term Policies at Ameritas, August 2020 ( Dungang Liu, Jennifer Kelly)
Customer churn is the focal concern of most companies which are active in industries with low switching cost. Among all industries which suffer from this issue, insurance is also significantly hit with approximate annual churn rates of 16%. Tackling this problem, there exist different approaches via developing predictive models for customer churn. In this project, we have tried the application of different classification models on the policy data at Ameritas to accurately predict the customer’s propensity to churn. Multiple datasets including information related to policies, customer and transactions have been analysed and combined for the study. In model building phase, logistic regression, decision tree classifier and random forest were utilized to get the predictions. All the models have been evaluated basis the out of sample accuracy and they performed exceptionally well giving accuracy between 80%-90% on the test dataset. The random forest model gave the best results with ~89% accuracy. Feature importance is also provided to get actionable insights for marketing.
Vishnu Vijayakumar, News Category Classification using Deep Learning, August 2020, (Yan Yu, Dungang Liu)
Text Classification is a classical problem in Natural Language Processing (NLP) where certain sentences, paragraphs or documents need to be assigned to one or more predefined categories.
Deep learning models based on recurrent structures have been able to surpass issues faced by conventional machine learning models and achieve satisfactory results in classifying text data by utilizing semantic information. While Deep Learning (DL) models have achieved state-of-the-art on many NLP tasks, these models are trained from scratch, requiring large datasets, and days to converge. These major drawbacks of DL models have been addressed through Inductive Transfer learning. Transfer Learning (TL) has thus changed the face of DL in NLP in the recent years by allowing us to take pretrained state of the art models and fine tuning them to suit the task at hand , thus obviating the need for training language models from scratch. This study, apart from exploring some DL models, would be focusing on two of the most popular TL models namely, Universal Language Model Fine Tuning (ULMFiT) and Bidirectional Encoder Representations from Transformers (BERT) that employ transfer learning to classify news articles into predefined categories.
Jayanth Sekhar Viswambhara, Amazon Fine Food Reviews Sentiment Analysis, August 2020, (Dungang Liu, Peng Wang)
Emotions are essential for effective communication between humans, so if we want machines to handle texts in the same way, we need to teach them how to detect semantic orientation of a text as positive, neutral, or negative. That is where Sentiment Analysis is used and is widely applied to voice of the customer materials such as reviews and survey responses, online and social media for applications that range from marketing to customer service that helps the organizations to make data-driven decisions. The focus of this project is application of sentiment analysis on the reviews data collected from amazon.com on fine foods. In this study, we used different feature generation techniques such as vectorization and word embeddingbased and machine learning classifiers such as Logistic Regression, Multinomial Naïve Bayes, Random Forest, XGBoost, and Support Vector Machine for text classification. Lastly, when we dig further to compare each model’s performance in classifying the sentiments, Support Vector Machine with linear kernel and bag of words – Bigram approach has the best F-1 score of 0.904 and Accuracy of ~95%. This provides us a bird’s eye view of the user perceptions about the fine foods and also acts as a powerful feedback mechanism for amazon.com and retailers, which they could use to make immediate corrections and improve their products and services.
Saurabh Wani, Movie Score Prediction, August 2020, (Yichen Qin, Liwei Chen)
IMDB score for a movie on the scale of 0-10 is a popular metric conveying the success/failure of a movie. The dataset for the project has been sourced from Kaggle, which originally was scraped from IMDB website. Project involves exploring the factors impacting the final IMDB score have viz. popularity of actors/directors, budgets, gross earnings etc. via data visualization. Post which, application of machine learning algorithms to predict the final IMDB score for a movie. It was inferred that the total number of users who voted for the movie, duration of the movie, budget and gross earnings for the movie are key factors that impact the final IMDB score. Four models viz. Multinomial Logistic Regression, Decision Trees, Random Forest and Gradient Boosting have been used to assess the prediction accuracy for the final IMDB score. The best accuracy rate of 78% was obtained for Random Forests followed by Gradient Boosting, Decision Trees and Multinomial Logistic Regression.
Yashwanth Kumar Yelamanchili, Identifying COVID Hotspots, August 2020, (Yan Yu, Denise White)
In this project, COVID hotspots (counties) were identified to understand the risk of the spread of disease while taking important business decisions involving the geographical location. Multiple factors summarizing the population estimates, demographics, income, and healthcare system were considered for this project. The final feature set including both base variables and derived variables was used to shortlist the factors affecting the rise in cases and the associated weightage for each of the factors. These factors are then used to calculate the score at a county level to classify the counties as hotspots. The number of cases was also forecasted for the 10th day from July 3rd, 2020 and the score was recalculated. This was done to check if the hotspots identified were stable or if the COVID hotspots are highly volatile and tend to shift in 10 days’ timeframe. The reason for changing only the ‘cases’ lever is because case density was a major factor that goes into the calculation of the score for a county. The COVID hotspots and the cases by county were then visualized on a Tableau dashboard to make the consumption easier and intuitive for the business. A total of 315 hotspots have been identified with ‘Los Angeles’ county in California having the highest score and thus the most susceptible to the spread of novel COVID–19 virus.
Laith Barakat, Candidate of Change? Did Unemployment Trends across America Contribute to the Rise of Donald Trump?, May 2020, (Dungang Liu, Edward Winkofsky)
In the aftermath of a particularly polarizing United States presidential election cycle of 2016, political pundits and commentators have been resolutely torn on the factors leading to the outcome. While many theories have been tested, one compelling potential reason for Donald Trump’s win in 2016 piqued interest for the research of this paper: that household economic performance and work force indicators significantly swung previously Democratic-leaning counties to vote Republican. This paper attempts to build simplistic logistic regression models around some such economic indicators at a county level. Once a complete model is achieved, the paper displays techniques that could be used as a foundation for more extensive and complex models, as well as an interesting application of basic statistical modeling within the political sphere.
Kevin Gilmore, Deep “Dish” Data Dive, May 2020 (Peng Wang, Liwei Chen)
This project contains three datasets in which I am addressing average rating, location, and pricing information of various pizza establishments around the US. The goal is to assist the average American consumer in making informed decisions about which pizza restaurants they would like to patronize. The data is first introduced, a data dictionary is created for the reader to further understand the data, the data is then cleaned, and then some initial exploratory analysis is done. After the exploratory analysis, some statistical modeling techniques were used to see the relationship and significance of different factors in relationship to price level and the owner of the barstool data (Dave). More mathematical numbers are looked at to break down the model summaries. A view of buying pizza at pizza establishments versus buying pizza at a place like a sandwich shop or bar/pub are also taken into consideration.
Leigha Kraemer, The Evolution of the Wage Gap in America, May 2020, (Leonardo Lozano, Ruth Seiple)
My capstone project is an extension of a project I completed in the Business Analytics Data Wrangling with R course in the fall semester. The final project I delivered for the course was about the evolution of the wage gap in America. I utilized several datasets to provide an in-depth analysis on the presence of the wage gap in different industries and within different age groups. There is incontrovertible evidence that a wage gap exists today and has existed for many years, which I support throughout my capstone analysis. A wage gap does not exist for all females across all industries, so in my extended research, I worked to narrow the focus to the industries, age groups, and locations that have the most prevalent wage gaps and what the reasons for those wage gaps may be. From displaying the datasets and pulling in outside research, I provide the consumer of the data with enough information to determine if they believe that the gender wage gap is improving and if it is not, the factors that may be causing it and the populations it is affecting the most. The main goal of my capstone project is to inform the reader about all aspects of the wage gap and encourage future generations to make a difference and reduce this plaguing issue.
Matt Lekowski, Beer Sales Based on Geography and Population Demographics, May 2020,(Michael Fry, Steve McGlone)
MadTree Brewing is one of the largest craft beer breweries in the state of Ohio. Based in the Oakley neighborhood of Cincinnati, MadTree uses several distributors to sell its beer in hundreds of zip codes across Ohio, Kentucky, and Tennessee. The populations of these zip codes are composed of a variety of different demographic types and geographic factors. Population age, ethnicity, median income, and gender breakdown, as well as geographic factors such as distance from a city center, all are potential factors that may influence craft-beer sales volumes. MadTree is seeking to increase its market penetration in the areas it currently sells its craft beer, so I have developed linear regression models to illustrate the relative significance of different predictor variables. I have also developed dynamic graphs and dashboards using Tableau’s geographic mapping feature as a means to visually compare different zip codes in various sales metrics including year-over-year increases in sales volume, sales volume per capita, and sales velocity. MadTree’s sales team will be able to use these dashboards to filter for certain package types, retailers, flavors of beer, and territories of their different sales representatives to further drill down their analysis and determine where improvements can be made with targeted sales and marketing efforts.
Jiaoyao Liu, Exploration of Map/Vision Control of Different Roles in League of Legends, May 2020, (Dungang Liu, Liwei Chen)
In the multiplayer online video game League of Legends, map/vision control is one of the key factors to win games strategically. Although other important elements could lead to final results – win or lose, for example, player items, skills, champion selections, etc., this project will be focusing on analyzing the quantified wards related variables of all five player roles, such as Top, Mid, Jungle, Duo Carry and Duo Support. The goal is to understand the warding behaviors of players and provide insights to help them increase win rate along climbing the ranking ladder or just become better players in general by managing the number of vision wards on the game map.
Spencer Niehaus, Application of Simulation and Optimization to Women's College Basketball Scheduling, May 2020 (Michael Fry, David Rapien)
The NCAA Tournament has been around since the 1980’s and has been a staple of College Athletics since its inception. In those years, the tournament has become a large source of revenue for the NCAA and the teams that are selected to participate. The Women’s Tournament takes a field of 64 teams that are composed of 32 conference tournament champions and 32 at-large bids selected by the NCAA Selection Committee. One of the biggest drivers for the selection of the at-large bids is the Ratings Percentage Index (RPI) that is used to rate the teams and their performances. The RPI is calculated using the formula 0.25*(the given team’s winning percentage)+0.50*(the given team’s opponent’s winning percentage)+0.25*(the given team’s opponent’s opponents winning percentage). This number also affects the other important factors for NCAA selection criteria such as strength of schedule and quality wins. The objective of this paper is to build a model that can predict the win probabilities of the teams for the next season. This will allow for non-conference schedules to be optimized to increase a team’s RPI and likelihood of making it to the NCAA Tournament
Cassidy Peebles, Exploratory Analysis and Reporting Tool UseCase on Credit Card Approval Rate, May 2020 (Yan Yu, Kyle Swingle)
Utilizing transaction level data, the following analysis serves to first, provide a summary of the variables that impact credit card approval rate, and secondarily, use that analysis as a foundation to design a reporting tool that will allow a user to track the approval rate over time and address the specific risks that arise. This work was done for Worldpay, a financial technology company in the payments sector, on a Revenue Assurance team.
Samantha Riser Rickett, Home City Ice: Supply Chain Management, May 2020, (Charles Sox, Uday Rao)
Supply Chain Management has been an area of interest among businesses that seek efficiencies and cost-saving opportunities in this area. Research shows that businesses that provide functional products value the physical costs of production, transportation, and inventory storage over market mediation costs. Therefore, proper production planning and inventory management are key components of a successful functional business. Optimal production levels minimize labor and raw material costs, and proper inventory management minimizes material handling and stockout costs. In combination, these lead to decreased costs, increased customer satisfaction and increased profits. These principles of supply chain management were applied to a Cincinnati ice manufacturing company called Home City Ice. Our team was deployed to analyze the company’s current supply chain and build an automated production and distribution schedule that will balance production levels with stockout costs. Utilizing 10 years of historical demand, as well as production capacity, storage capacity, and truck fleet across all 49 manufacturing facilities and 55 storage facilities, we delivered a model that yields an optimal profit-maximizing production and transportation schedule as well as provides other important operational measures at any given point in time. Additionally, a more accurate forecasting model was developed to further support our optimization model. Both have outperformed the company’s current processes through time and accuracy.
Chi Zhang, Telco Customer Churn Prediction, May 2020, (Peng Wang, Yan Yu)
Customer churn, also known as customer attrition, is the loss of clients or customers. The dataset is from Telco company who wants to observe their customers' churn behavior. Based on the predictive model, they can know their customers' propensity of risk to churn. The cost of retaining a customer is much lower than acquiring a new customer, so that the company can focus on those potential defectors with their customer retention programs. In this project, I use serval methods to determine the significant variables that affect customer churn and use those variables to build a logistic regression model to predict the probabilities of customer churn with the future new dataset. To determine the significant factor that effecting churn, I use AIC stepwise and LASSO to do the variable selection. In addition, I also build the model based on the decision tree, random forest, and xgboost evaluate the performance with confusion matrix to compare with logistic regression. I was able to find out the best model to predict customers’ behavior, help the company reduce the loss.
Tyler J. Creel, Supply Chain Optimization: The Final Mile, May 2020 ( Yinghao Zhang, Leonardo Lozano)
Kroger is headquartered in Cincinnati, OH and is the United States largest retailer with nearly 2,700 stores nationwide. Kroger’s supply chain network is very complex and consists of 38 manufacturing facilities and 42 distribution centers, all strategically placed at different local, regional, and national levels. As e-commerce continues to grow and customer shopping trends evolve, Kroger is adapting and growing their supply chain to meet these needs. In 2018, Kroger formed a partnership with Ocado, a European online grocery retailer so that they could continue to serve their customers and bring grocery shopping to their homes. This partnership will allow customers to order online and have their groceries delivered to their homes. The task I set out to solve was to find the best location for the first first Ocado/Kroger distribution center. I did this by creating an in-depth optimization model. The biggest difficulty I faced when building this model was accurately representing an unknown customer demand for different urban areas in the Midwest. I was able to accomplish my task through the use of multiple simulations and the optimization model itself.
Anirudh Bhanu Teja Addala, Demand Forecasting for Dymatize, December 2019, (Yichen Qin, Michelle Xu)
Dymatize is a provider of premier nutritional and body building supplements which has its operation in Europe, Asia and United States. Dymatize uses third party vendors to produce and sell its products across the globe. The major clients for Dymatize are Amazon, BB.com, Walmart etc. As the production of its products is handled by a vendor, Dymatize needed upfront prediction on the demand from different customers for different products for a proper inventory planning and expansion of its business. Dymatize requires a prediction of 12 months for its products at different levels i.e. at a size level (1 lb., 2 lb., 5 lb. etc.) and at a flavor level (i.e. Vanilla, Chocolate etc.). The challenges in the project include the inconsistent demand for less desired projects and shorter life span of the products due to the increasing need of innovative products in the market. Demand forecasting is done using different time series models like Exponential Smoothing, Croston’s Method of Intermittent Demand Forecasting, ARIMA and error measure used is WMAPE and RMSE to compare the models.
Ramana Kumar Varma Nadimpalli, Data Analytics on Project Durations, December 2019, (Yichen Qin, Yatin Bhatia)
Incedo is a Bay Area headquartered digital and analytics company that enables sustainable business advantage for its clients by bringing together capabilities across Consulting, Data Science and Engineering to solve high impact problems. Verizon is one of its Clients. The completion and service level agreement (SLA) compliance rate for IEN (Intelligence Engineering Network) projects at Verizon is lower than desired. The root cause of the low compliance and low completion rate is not known. Verizon would want to leverage data insights and analytics to address these issues.
We analyzed data using statistics-based approaches to get insights on different project types (projects containing At your service tasks (AYS) and projects containing non AYS Tasks). We extracted themes from the AYS (At your service) tickets (text corpus) using topic modeling and analyzed the resolution times and task durations of these themes. Also we built a scoring model to score each assignee on a 100-point scale based on task completion times.
Amir Babar, Analysis of Physician Sentiments on the Allocation of Work Hours, December 2019, (Michael Fry, Ed Winkofsky)
Physicians at a university hospital can work at up to three different locations due to requirements to staff two community hospitals in addition to the university hospital. In response to reported dissatisfaction with the process for allocating physicians’ hours at the three locations, physicians were surveyed regarding their sentiments toward various aspects of the department’s process. Additionally, respondents ranked the importance of various potential “contribution metrics” to be used to weight physician preferences in a new process for assigning hours at different locations. Significant differences in sentiments were found based on respondent demographics, with younger, less senior faculty members, reporting greater dissatisfaction in the overall process. These differences were further reinforced by clustering respondents based on their sentiments. Two clusters were identified – one generally very satisfied with the process and one dissatisfied. The former cluster consisted of older, more senior, faculty with larger proportion of males. Examination of rankings for potential contribution metrics among this cluster revealed high ratings for factors such as years practicing medicine and years as a faculty member, as well as research involvement and team fit. The latter cluster, while ranking certain metrics similarly to the former cluster, ranked seniority and team fit as far less important, while putting a much greater emphasis on a physician’s total clinical hours when prioritizing preferences for hours assigned to each facility.
Brandon Lester, Predicting NFL Point Spread, December 2019, (Charles Sox, Paul Bessire)
Predicting the outcome of sporting events has been around for years. Whether it’s ESPN analysts discussing matchups or an individual betting on the Vegas spread, improved methods to predict game outcome holds a lot of interest. This project utilized the random forest algorithm to create a model to predict future NFL games. Using R as the primary tool, game level and play-by-play data was collected from nfl.com using the nflscrapR package, transformed into the final data set, and fit into a random forest model using the ranger package. The best root mean squared error achieved was 12.99.
Chunyan Su, Are Lego sets priced too high?, November 2019, (Peng Wang, Yichen Qin)
How is a Lego set priced? You can actually find the answer in Lego official site, which states: “Finding the right price for a set isn’t easy and depends on a lot of factors. To name a few, the number of new and unique molds required, and the cost of licensing characters from other companies and brands.” In this project I will use a Lego data set from Kaggle.com and explore the relationship between price and other factors. Firstly, I will conduct a data exploratory analysis to get a general idea of the data set, as there are a variety of data types such as categorical, ordinal and numeric. Secondly, I will study the relations between pricing and variables for variable-selection purposes. In the process, I will try best subset approach, random forest, and gradient boosting approach. Later, I will split data into training sample and testing data and use MSE to measure the performance of each methods. Thirdly, a regression model will be built with R-square and total variance as model metrics evaluating the prediction accuracy of the model. Last but not least, I will share some insights from my analysis, hopefully I will be a Lego expert shopper by the end of study.
Kaijun Sheng, RDC Mobile Model, November 2019, (Yichen Qin, Joseph Burke)
This paper explains the process of building a RDC Mobile Model for account age less than 90 days to prevent fraud related to mobile deposit. Exploratory data analysis including statistical summary and histograms of numeric variables, collinearity check of variables to omit over-fitting, variable selection using stepwise selection and best subset selection, model selection based on performance on training dataset and model validation on testing dataset will be performed in order to select the final model. The final model will help us to understand what variables are significant to prevent frauds related to mobile deposits while being used daily.
Shashank Kumar, Improving Post Launch New Product Performance Tracking, November 2019, (Amitabh Raturi, Sara Palavicini)
The four business segments of the Biosciences Division (Cell Biology, Molecular Biology, Protein and Cell Analysis, and Sample Preparation) thrive on their ability to introduce new products in the market with the following objectives: to keep the portfolio afresh; and to drive market penetration and stay ahead of the competition. Tracking the progress of the new products after their launch is a process which requires inputs from multiple teams and consumes a lot of time. There is a need to prepare automated business intelligence reports about the performance of the various SKUs across geographical markets by extracting data from the dynamically updated database. As a part of that project the focus is to improve the post launch New Product Introduction (NPI) tracking process. This process tracks the performance of a new product launched by a business segment for six months against several metrics. These metrics evaluate the product from different perspectives of teams involving performance data from marketing, operations and finance. As of now the tracking and reporting process involves data input from the three teams into a flat file and the combined report at times has issues during reporting and understanding/interpretation. Therefore, the project is aimed at improving the metrics and automating the process for visualization of the data on Power BI. This will help in increased understanding of the report and the better usage of the product details for further analysis.
Trishul Gowda Ashok, Market Basket Analysis & Inventory Management Model, November 2019, (Yan Yu, Eric Walters)
Milacron, a global leader in the manufacturing, distribution and service of highly engineered and customized systems in plastic technology and processing industry is moving towards data-driven strategies. The Aftermarket Analytics and Business Intelligence team are building multiple in-house data products. One of the products is the Shopping Cart Tool, which provides recommendation to the customers based on what they have quoted for. I was assigned the task of using the transaction data to generate association rules that can be used to provide recommendations to the customers. Spare part recommendation helps in cross-selling and thereby increases the revenue for Milacron and helps in reducing the shipping and servicing costs for the customer. As part of the Graduate Case Study course, we developed a time series forecasting model and an inventory optimization model for Milacron. I also worked on testing the models that was built during the Graduate Case Study course, identification of challenges to implement the model and making the necessary changes in the model to suit the replenishment process at Milacron.
Anusha Chintakunta Manjunatha, B2B Customer Profiling with External Data, September 2019, (Yiwei Chen, Rajat Swaroop)
CDW, a leading provider of technology product and services in business-to-business (B2B) space, is moving towards data-driven marketing strategy. The Enterprise Data Science and Advanced Marketing Analytics team is building multiple in-house data products. One of the products is Customer 360, which provides a unified customer profile including internal and external data sources. I was assigned the task of exploring external data sources and provide CDW with sample useful data. Signals gleaned from external data including news and social media, job listings, turnover and more can indicate when a lead might be ready for the sales team to approach. Events like growth in R&D, company restructuring, hiring acceleration, and more can all be indicators of a firm’s readiness to buy from CDW. I have used R and Python for my activities of building Application User Interface (API) clients, web scrapers for data collection and transformation activities.
Tess Newkold, Trump: Ten Years of Tweeting, November 2019, (Dungang Liu, Liwei Chen)
The President of the United States of America is one of the most important positions in the world. Everything said, written, or tweeted is of great importance. The Department of Justice has said they are treating Donald Trump’s tweets as official presidential statements. In order to better understand what Trump has tweeted in the last ten years I will use natural language processing techniques on all 39,000+ tweets from the “Trump Twitter Archive” online. This analysis looks at what Trump tweeted the most, when he tweeted, and his sentiments overall. I will also analyze how each of these have changed over the last ten years. The results show that the general sentiment of Trump’s tweets is overwhelmingly negative and that the tweets increased in negativity over the span of the years analyzed. Lastly, the more frequently Trump uses emotions like anger, fear, disgust, and sadness the more retweets the President receives from his followers.
Anthony Selva Jessobalan, Handwritten Digit Recognition, August 2019, (Dungang Liu, Liwei Chen)
Image recognition has been an important part of technological research in the past few decades. Image processing is the main reason why computer vision has been made possible. Once the image is captured, the computer stores the image in 3D arrays, with the dimension referring to height width and the color channel. It is then compressed and stored in popular formats such as jpeg, png, etc. For the computer to understand these numbers it is important to train the machine by tagging the image and enable learning. The main idea of this project is to use Image recognition techniques to identify handwritten digits in the image. It is prudent to use deep Neural Networks for complex problems such as image processing. Neural network breaks down complex problems into simpler understandable form. In order to achieve this, Tensorflow library has a host of pre-built methods, which can be used directly. The data for this project is from the online competition hosted by analyticsvidhya.com. The data is divided into test and train ‘csv’ files. ‘train.csv’ has two columns namely ‘filename’ and ‘label’. Filename refers to the 70000 png 28 X 28 size, totaling 31MB, files of these handwritten digits. Label is the tagging associated with each images. Using the tensorflow framework, the images were predicted at an accuracy of 95.28. Tensorflow is a framework that relies a lot on computational power and hence higher accuracy could be obtained by tweaking the hyper parameters on state-of –the-art systems. With limited computational capability tensorflow performed better for image recognition.
Pallavi Singh, Anomaly Detection in Revenue Stream, August 2019, (Dungang Liu, Brittany Gearhart)
The client owns and operates parking facilities at multiple airports across the US. The revenue is calculated and collected through cars parked at these locations based on the price, duration and type of parking along with any discount coupons that may have been used during the transaction. The revenue is collected by Cashiers and Mangers managing the booth. The client has observed that at certain times there have been discrepancies in the revenue collected and the number of cars that exit the parking facility. In most such cases the revenue has been observed to be lower than expected based on the number of cars that were parked in the facility. This observation led to ad hoc investigations, and it was observed that some employees managing the booth were not being completely transparent and honest in their management, and frauds were taking place.
The client wants to identify these frauds in a timely manner as the current process is tedious and ad hoc, and there is a very high possibility of some frauds being missed and overlooked by the very nature of the investigation. The client wants an automated process where such anomalies in the revenue stream can be identified automatically, and timely investigation can be carried out.
It was decided to build the required model for one parking facility, tune the model and validate the results before the same could be scaled to multiple locations.
Vinaya Rao Hejmady, NYC Taxi Rides - Predicting Trip Duration, August 2019, (Peng Wang, Yichen Qin)
To improve the efficiency of electronic taxi dispatching systems, it is important to be able to predict how long a driver will have his taxi occupied. If a dispatcher knew approximately when a taxi driver would be ending their current ride, they would be better able to identify which driver to assign to each pickup request. In this project, I will build a predictive framework that is able to infer the trip time of taxi rides in New York City. The output of such a framework must be the travel time of a particular taxi trip. I will first study and visualize the data, engineer new features, and examine potential outliers. I will then analyze the impact of the features on the target trip_duration values.
Temporal Features Analysis: I will look for time-based trends in the target variable and see if there are patterns that it is following. Finally, I will build a model to make a prediction of the trip duration. I plan to try Regression, Decision Trees, Gradient Boosting and fit the best model to the data.
Nan Li, Bon Secours Mercy Health Reimbursement Analytics, August 2019, (Michael Fry, Jeremy Phifer)
Bon Secours Mercy Health home office recognizes the need to project gross revenue and net revenue on a monthly basis. This process allows management to make critical business decisions and plan accordingly. The goal of the tableau dashboard is providing an integrated visualization which helps the Chief Financial Officer for each group and each market easily understand the projected gross revenue and net revenue performance in the current month. Conducting a payment forecasting for next month helps the leaders to make assumption about the future operation. Management of Bon Secours Mercy Health is interested in quantifying cash collections to understand financial performance and evaluate revenue cycle operations. The ARIMA (1,5) model in SAS predict the monthly payment is closer than the average historical payment data by using five-year historical payment data and is being considered as an alternative approach for payment activity forecasting in the future.
Kratika Gupta, Talkingdata Adtracking Fraud Detection Challenge, August 2019, (Peng Wang, Liwei Chen)
We are challenged to build an algorithm that predicts whether a user will download an app after clicking a mobile app ad. To support the modeling, we are provided a generous dataset covering approximately 200 million clicks over 4 days! Evaluation is done on area under the ROC curve between the predicted probability and the observed target. I first started with basic Exploratory Data Analysis to understand the features. I plotted graphs for all features when the app was downloaded, and the app wasn’t downloaded. After getting a basic idea of the distribution of the variables, I then did Feature Engineering as required, to fit the model better by additional features based on the frequency count. The Modelling started with the basic Logistic Regression to understand the simple classification model (linear). I then built a Random Forest to consider the non-linearity in the data. For a better performance and predictive aspect, I tried other advanced models such as Gradient Boosting, SVM and Neural Net.
Anupreet Gupta, Strategy and Portfolio Analytics, August 2019, (Mike Fry, Siddharth Krishnamurthi)
Credit cards have become an important source of revenue for the bank, as it charges a higher Annual Percentage Rate (APR) in-comparison to any other consumer lending products that the bank has to offer to a customer. While the sources of revenue include the interchange fee, transaction charges, and finance charges, the industry is being very competitive and introduces promotional offers to lure the customers to get onboard. Knowing and understanding from a portfolio point of view, it is of great significance to be able to forecast how would the book look like in the future. Having sight of this helps different teams and departments to prepare a plan of action for the coming years. Also, credit card business possesses a risk to the bank whether or not the customer is able to fully repay the amount borrowed using the credit card and there comes the role of collection strategies as in to recover the amount or avoid the customer from being charged-off. Using the model built on existing hardship enrolled customers, predicted the most likely customers to enroll for the program and proactively try to pitch them before they are charged-off from the books. Enhancing customer experience is amongst the core values of Fifth Third Bank. One such attempt is to extend the expiration date of the Rewards Points earned by the premier customer by a year without impacting the financials of the bank. Delinquent customers were identified one such area of opportunity wherein to cover the loss due to the extension.
Anirudh Chekuri, Churn Prediction of Telecommunication Customers, August 2019, (Yichen Qin, Peng Wang)
There is customer churn when the consumer stops doing business with a company. The cost of retaining a customer is low compared to acquiring a new customer. So, for any business churn prediction would prove an important investment in terms customer lifetime value and marketing. In this project we have data from a telecommunication company, and we try to determine the reasons for the customer churn and build a predictive model to give the probability of customer churn with the given data. We have used Random Forest to check variable importance using mean decreasing GINI and mean decreasing accuracy and logistic regression with logit link to determine the probabilities of customer churn with the given data. We can use the variables which turned out to be important factors effecting churn and use them to design actionable strategies to reduce the churn.
Ashish Gyanchandani, Fraud Analytics, August 2019, (Michael Fry, Andy M)
XXX is currently building two types of software products - Integrity Gateway Pre-Approval and Integrity Gateway Monitoring. My work revolved around improving analytical aspects of the Integrity Gateway Monitoring, which helps customers continuously monitor their employee spend data with XXX risk engine algorithm. The data that I worked on was Concur expense data. It contained the expense details entered by the employees in the Concur expense tool. Some of the expenses captured in these reports are Transportation, Supplies, Meals, etc. The dataset contained close to 1.5 million records. The topics that I worked on can be classified into 3 categories. The first category can be classified as exploratory analysis, the second category can be called as criteria set, and the third category can be called modeling. The exploratory analysis required me to look at the round dollar transactions, the creation of expense categories using expense types, etc. Criteria setting needed me to come up with benchmarks that will help XXX to compute the risk score. The benchmarking involved computing cash to non-cash transaction ratio for all the countries, etc. Finally, modeling involved the creation of employee clusters, anomaly, and trend detection.
The programming language/ tools used for this analysis are R, Tableau, and Amazon AWS Sagemaker.
Harpreet Singh Azrot, An Analytical Study of West Nile Virus (WNV) Mosquitos in Chicago, August 2019, (Peng Wang, Yichen Qin)
The objective of the study is to understand and analyse how WNV found in certain mosquitos is affecting the city of Chicago over the last few years. This study can play a crucial role in identifying the important factors and conditions that results in finding these mosquitos. It will also play a crucial part in predicting given specific parameters and conditions thus by a community’s point of view, appropriate actions can be taken to mitigate the risks. These predictions will be achieved by implementing multiple Machine Learning Algorithms and then comparing them to find the best model for prediction purpose.
Palash Arora, Predicting Revenue and Popularity of Products, August 2019, (Yichen Qin, Nanhua Zhang)
Insurance and healthcare companies can benefit by analyzing customer demographics in order to promote the right type of product. In this project our goal is to understand the relationship between various customer demographic factors and product preference in different regions. We also predict the expected revenue for each zip code across United States. We analyzed approximately 6,000 zip codes with 25 predictor variables such as average age, salary and population in order to predict 2 dependent variables: preferred product and expected revenue in each zip code. We have used 2 statistical methods in this project: Linear regression to predict the expected revenue generated in each zip code; Multiple Logistic Regression to predict the preferred product type in each zip code.
Apoorva Rautela, Event Extraction from News Articles using NLP, August 2019, (Charles R. Sox, Amit Kumar)
Huge amounts of text data is generated every day. Some of the information contained in these texts needs to be handled and analysed carefully. Natural language processing can help organizations build custom tools to process this information to gather valuable insights that drive businesses. One of the common applications of NLP is called Event Extraction, which is the process of gathering knowledge about periodical incidents found in texts, automatically identifying information about what happened and when it happened. This ability to contextualize information allows us to connect time distributed events and assimilate their effects, and how a set of episodes unfolds through time. These valuable insights drive organizations, which provide the technology to different market sectors. Steel tariffs have a direct impact on the Oil Country Tubular Goods (OCTG) market. This project aims to extract events from the past 18 months news articles related to ‘steel tariffs’.
In this work, news articles related to ‘steel tariffs’ are collected from newsapi.org and then the text information is processed using NLP techniques. This work focuses mainly on extracting events using ‘extractive text summarization’.
Pravallika Kalidindi, Analysis of Balance Transfers and Credit Line Increase Programs for Credit Cards, August 2019, (Michael Fry, Jacob George)
Balance transfer (BT) and credit line increase (CLI) programs are two main profit generating programs for credit card companies. Throughout this project we tested different marketing channels, customer behavior, profit and risk drivers for balance transfers and credit line increase programs. Balance transfer program includes identifying the right customers and giving them lucrative offers to transfer their credit card debt from another bank to Fifth Third. Credit line increase programs is where the credit card company increases the credit limit for selected credit-worthy customers enabling them to increase their purchases thereby capitalizing on the incremental interchange revenue and finance charges. The key findings of our analysis are as follows. Customers doing a digital BT tend to do a greater number of BT’s but with each BT being of lesser value compared to non-digital BT’s. We observed that % accounts going delinquent and charge-off are higher when they use convenience checks proving convenience checks are riskier. On a portfolio level, customers are taking on more debt after BT, but this behavior is highly dependent on the type of customer. To reduce our losses, we analyzed a potential solution – to cancel the promo APR for a customer when he goes delinquent. We calculated the estimated finance charge collectible at different stages of delinquency cycle. We observed that risk metrics for CLI are close to each in test and control groups.
Guru Chetan Nagabandla Chandrashekar, Improving Delivery Services Using Visualizations, August 2019, (Charles R. Sox, Pratibha Sharan)
The Commercial Effectiveness team at Symphony Health provides Consulting and Analytics services to healthcare companies of all sizes around the country. They provide standard solutions to the brand teams of drugs from pre-approval, pre-launch, launch until patent expiry phase. A lot of these solutions can be standardized and automated to eliminate repetitive work, save time, reduce errors and get to insights faster. One of the ways to achieve this is by developing standardized visualizations and dashboards that capture the must-haves in key solutions or key aspects of a project. This report will go through a few visuals I developed during my internship at Symphony Health. This report will cover the need for developing each visual, understanding the data required, design, outputs and the impact.
Mohit Anand, Predicting Customer Churn in a Telecom Industry, August 2019, (Peng Wang, Liwei Chen)
Customer attrition, also known as customer churn, customer turnover, or customer defection, is the loss of clients or customers. Telephone service companies, Internet service providers, pay TV companies, insurance firms, and alarm monitoring services, often use customer attrition analysis and customer attrition rates as one of their key business metrics because the cost of retaining an existing customer is far less than acquiring a new one. Companies from these sectors often have customer service branches which attempt to win back defecting clients, because recovered long-term customers can be worth much more to a company than newly recruited clients. Companies usually make a distinction between voluntary churn and involuntary churn. Voluntary churn occurs due to a decision by the customer to switch to another company or service provider, involuntary churn occurs due to circumstances such as a customer's relocation to a long-term care facility, death, or the relocation to a distant location. In most applications, involuntary reasons for churn are excluded from the analytical models. Analysts tend to concentrate on voluntary churn, because it typically occurs due to factors of the company-customer relationship which companies control, such as how billing interactions are handled or how after-sales help is provided. Predictive analytics use churn prediction models that predict customer churn by assessing their propensity of risk to churn. Since these models generate a small prioritized list of potential defectors, they are effective at focusing customer retention marketing programs on the subset of the customer base who are most vulnerable to churn.
Kunal Priyadarshi, Microsoft Malware Prediction Challenge, August 2019, (Peng Wang, Liwei Chen)
A malware is a software designed to cause damage. We want to help protect more than one billion windows machines from damage before it happens. The problem is to develop techniques to predict if a machine will soon be hit with malware. It is a classification problem and the models were built using decision trees (CART), Random Forest and Gradient Boosting Machines. These are the current state of the art algorithms. They don't require any assumptions between independent and dependent variables and work in non-linear environment. The algorithms used handles missing values on their own as they all are based on decision trees. Also, the entire code is reproducible. While Random Forest and Gradient Boosting Machines were giving comparable area under the curve (AUC) on the test data, the training AUC was significantly larger for random forest. It is recommended to use Gradient Boosting Machines as the final model as bias was similar while variance was lower for GBM.
Aniket Sunil Mahapure, Quora Question Pairs Data Challenge, August 2019, (Peng Wang, Liwei Chen)
This project is based on a Kaggle competition (https://www.kaggle.com/c/quora-question-pairs/overview). Quora is a platform to ask questions and connect with people who contribute unique insights and quality answers. Over 100 million people visit Quora every month, so it's no surprise that many people ask similarly worded questions. Multiple questions with the same intent can cause seekers to spend more time finding the best answer to their question, and make writers feel they need to answer multiple versions of the same question. So, Quora is keen to group multiple questions based on their meaning to reduce redundancy and improve overall convenience for users. In this competition, objective is to tackle this natural language processing problem by applying advanced techniques to classify whether question pairs are duplicates or not.
Supriya Sawant, Prediction of Fraudulent Click for Mobile App Ads, August 2019, (Peng Wang, Liwei Chen)
This project is based on Kaggle competition (https://www.kaggle.com/c/talkingdata-adtracking-fraud-detection/overview/description). The project is based on fraudulent click traffic for mobile app ads. For companies that advertise online, click fraud can happen at an immense volume, resulting in misleading click data and wastage of money. TalkingData is China’s largest independent big data service platform, covers over 70% of active mobile devices nationwide. They handle 3 billion clicks per day, of which 90% are potentially fraudulent. China is the largest mobile market in the world and therefore suffers from huge volumes of fraudulent traffic. In this project we are required to build an algorithm that predicts whether a user will download an app after clicking a mobile app ad.
Lixin Wang, Geolocation Optimization for Direct Mail Marketing Campaign, August 2019, (Michael Fry, Shu Chen)
This capstone project is part of the intern project for the marketing analytics in Axcess Financial. The goal of the project is to analyze the geo-spatial relationship between stores and customers, identify trade area, and optimize store assignment in the direct mail marketing campaigns. Historical customer information was extracted from database using Structured Query Language (SQL) and PROC SQL procedure in SAS. Spatial analysis was done using pivot table in Excel and simple descriptive analysis was done in SAS. Interactive dashboard was created in Tableau to visualize the geo-spatial distribution of stores and customers. Major market for each store was identified, and trade areas were divided. Store analysis shows that majority of customers in each zip code went to the top 3 stores when there are multiple destination stores. The top 3 destination stores are consistent with the stores assigned to each zip code, suggesting that the current store assignment strategy works well on the zip code level.
Menali Bagga, Analysis Defects and Enhancements Tickets, August 2019, (Michael Fry, Lisa DeFrank)
This capstone project contains two major applications of what I learnt during my master’s in business Analytics– Data Visualization (the tool used here is Power BI) and Data Mining using Clustering Analysis (using K-Means). The first half of the project was done with the motive of visualizing the number of open critical, high priority production support tickets, mainly defects and enhancement type prior to the August 2019 release. To achieve this objective, I used Power BI where I pulled the relevant data by developing suitable queries in Azure DevOps service, then connected it to Power BI and filtered the data directly in it to suit my needs. While, the second half of the project was done with the objective of performing a clustering analysis on the tickets to facilitate capacity planning by putting the tickets in the suitable brackets.
Syed Imad Husain, Blood Supply Prediction, August 2019, (Chuck Sox, Shawn Gregory)
Hoxworth Blood Center is the primary blood donation centers in the Greater Cincinnati area. Uncertainty in blood supply patterns and donor behaviors is one of the greatest challenges dealt by the Donor Services and Blood Center operations. This project deals with developing analytical methods to sustain data driven decision making for them by employing descriptive, predictive and prescriptive analytics. The main areas of focus of this project are understanding donors’ participation (classification) and predicting donor turnouts (regression) for a given drive. Different supervised and unsupervised learning techniques have been employed to uncover trends.
Lakshmi Mounika Cherukuri, Brightree Advanced Analytics Projects, August 2019, (Michael Fry, Fadi Haddad)
Brightree Advanced Analytics team focuses on providing tailored analytical solutions to internal and external customers, through dynamic dashboards that are easy to navigate. The team contributes to the growth of customers by providing clean, consolidated and consumable data insights. This capstone report outlines two of such projects – AllCall KPI Survey and a Customer Profitability Analysis. The AllCall KPI Survey project involves one of our internal customers – AllCall, a subsidiary of Brightree that works on resupply orders. The project requires us to embed a feedback survey questionnaire into Sisense, enabling the surveyor to input feedback through a dynamic dashboard and then store the responses into the Database. Once the survey results are in, we need to analyze the data and then visualize it to a KPI review dashboard, which will identify most efficient callers, number of sales orders taken by each caller and observe whether necessary etiquettes are practiced by callers while communicating with the patients. The Customer Profitability Analysis is a project that involves our external Customers. For this project, the team is tasked to identify manufacturers and items that yield most profits factoring in the Costs, Revenues, Bill Quantities and Number of Sales Orders for each Item Group. In addition to this, Customers also want to detect the main source of new patients (e.g., from Referrals, Ordering Doctors, Marketing Representatives). The final product is expected to be a dynamic dashboard, which shows the aforementioned KPIs and profitability measures over time.
Maryam Torabi, Improving Patient Flow in an Emergency Department: a Computer Simulation Analysis, August 2019, (Yiwei Chen, Yan Yu)
In this study I have used a yearlong operational time-stamp data from a regional Level II Trauma Center emergency department in Virginia to understand the nature of patient flow in this ED and to build computer simulation models. The emergency department routes patients to 4 different treatment teams based on the severity of their condition. I have simulated the current system, and an alternative that pools two of the treatment teams, and delegates some tasks to the triage nurse. Comparing the average Length of Stay (LOS) of patients in the pooled team (ESI2 and ESI3), and the weighted average of patient wait time after triage to get into a bed shows that pooling resources improves both of these performance metrics at 0.05 level.
Apoorva Bagwe, Loss Forecast Model, August 2019, (Charles R. Sox, Adam Phillips)
Axcess Financial Inc. offers different types of loan products to its customers. A Retail Choice Loan Product (CLP) loss forecast model is currently being used by the company to forecast the amount of money the company will lose due to its Retail CLP customers charging off. These models have been developed in SAS and are refreshed every month. Since the processing time of the process is high, the modeling process needs to be replicated on Snowflake. My task was to convert the loss forecast models from SAS to Snowflake. This resulted in reducing the time taken for the execution from 7-8 hours to less than an hour. The project was divided into four phases – creating the base data, forecasting charge offs using Markov Chain modeling, forecasting charge offs using loss curves and improving the overall efficiency of both the process and the model. As two different data integration processes were responsible for the company’s data being loaded in SAS and Snowflake, a lot of checks at each stage were needed to ensure the accuracy of the results at each step. Due to the functional and coding differences in SAS and Snowflake, different data structuring approaches were needed for the replication of the analysis on Snowflake. Another challenge I faced was that the SAS databases were updated daily while the Snowflake databases were updated every few hours. The business models in Ohio, Illinois and Texas were different from the rest. Therefore, loans from these states were analyzed and modelled separately.
Vishnu Guddanti, Response Model Analysis, August 2019, (Michael Fry, Kaixi Song)
Credit cards became an important part of everyone’s life. They have emerged as one of the most convenient and easiest ways to transact. The credit card industry is a lucrative business. The major revenues include interest revenue from revolving balances, missed payments, late fees, annual fees, merchant fees etc. Most banks that issue credit cards run acquisition campaigns to acquire customers. Direct mail campaign is one of the acquisition strategies employed by the Fifth Third Bank. This involves a mail being sent to a prospective customer with an offer such as balance transfer offer or spend to get cashback offer or zero percent APR offer for a certain period. The project seeks to improve the population selection strategy of the direct mail campaigns for the Fifth Third Bank. The population for a direct mail campaign is selected by considering a variety of factors including marketing costs, mail offer, response score deciles, present value of the prospective customer, FICO score, response rate and approval rate of the customer. Based on these factors, return on marketing investment (ROMI) is calculated on FICO group level and response score decile level. Only the population that meets ROMI cut-off is selected for the direct mail campaigns. The project seeks to improve campaign efficiency by calculating ROMI on a granular response score level and FICO group level employing exponential regression models. Through response model analysis, 10k more customers could be targeted resulting in 26 more credit card accounts booked and a Net Present Value (NPV) increase of 9,824 USD for the bank.
Douglas Kinney, Emerging Risk: Visualizing, Mining, and Quantifying Wildfire Exposure, August 2019, (Michael Fry, Dan Madsen)
One of the primary challenges insurance and reinsurance companies face today is understanding catastrophe risk in a changing landscape. Population movement, city development, climate change, and recent major events in California are the key factors driving an increased focus on wildfire risk at natural disaster level. Model vendors have not yet caught up with a succinct, transparent method of quantifying concentrations of risk, aggregating the level of pure hazard, or estimating damageability of a given location. This paper’s focus will be leveraging location data to solve the problem of comparing concentrations of wildfire risk in California, across varying portfolios of business. The aim is to create a customized view of risk for each data set, using proprietary wildfire hazard grading. The end-result is a framework of analysis that produces digestible information for underwriting, executive review, and decision-making purposes.
Nitesh Agarwal, Predicting the Occurrence of Diabetes in PIMA Women, August 2019, (Yan Yu, Akash Jain)
The diabetes data containing information about PIMA Indian females are used for the analysis. Data contains information about 768 females, of which 268 females were diagnosed with Diabetes. The information available includes 8 variables, such as Age, Number of Pregnancies, Glucose, Insulin, etc. Missing values in the dataset constituted to about 30% of the observations. MICE (Multivariate Imputation via Chained Equations) was performed to impute the missing values in the data set. Performing correlation analysis showed that Insulin and Glucose, BMI and Skin Thickness had a moderately high linear correlation. Logistic regression, Classification tree, Random Forest and Support Vector Machine models are deployed, and Support Vector Machine is chosen as the best model based on out of sample AUC. It also has minimum misclassification rate.
Pooja Purohit, Marketing Analytics for JoAnn Stores, August 2019, (Charles R. Sox, Prithvik Kankappa)
In today’s scenario, retail industry is one of the most volatile industries due to uncertain economy, digital competition, increasing number of product launches, shift in customer interests, tariff pressures, supply-chain constraints etc. Jo-Ann has a brick-and-mortar model with a little online presence (~4%) which is facing the same challenges on a day-to-day basis. It is considering tapping the available amount of data in order to optimize its sales and increase margin. Advanced analytics can deliver insights that inform smart decisions from deciding what promotions should be run for a product to what price it should be set to maximize margin. This report is primarily based on designing a simulation and planning tool by Impact team for Joann stores to get far more from their marketing spending, helping plan, anticipate and course correct their promotional strategies in a very dynamic market. As of now, Joann is focusing primarily on two levers i.e. promotion and pricing for improving their financial performance. This report is primarily focused on pricing aspect where using advanced models, Impact team is helping Joann to develop its pricing strategy. Using historical data, granular level demand models are created to anticipate price elasticity. Based on these models, simulators are designed to evaluate the right price for a given product in order to facilitate minimum margin leakage.
Akash Dash, Using Data Analysis to Capture Business Value from the Internet of Things (Iot) Data for a Leading Manufacturer, August 2019, (Michael Fry, Sagar Balan)
Anybody would seldom pay more attention than required to the smart dispenser machines (dispensing tissues, bath towels, hand soap, etc.) in restrooms. Whether on vacation, staying in the best hotels or on a business trip traveling through airports, these ‘smart restrooms’ are a part of our experience. Our client collects a huge amount of instreaming data from their smart restroom solutions and wants to capture business value out of the data. In this paper we describe how, through the use of data analysis, we helped the client with recommendations on two key business problems they have in mind. The first problem we attack is how to help increase sales. And, the second problem revolves around creating more time savings for the maintenance staff (who are the end customers). Our methodology includes a consulting approach to first understand the problem from client stakeholders, and then apply data cleaning, wrangling, exploration, and visualizations to uncover trends and insights. The tools primarily used through the project have been PostGre SQL and R-studio.
Ishali Tiwari, Prediction of Wine Quality by Mining Physiochemical Properties, August 2019, (Yan Yu, Ishan Gupta)
Certification of product quality is expensive and time consuming at times, particularly if an assessment by human experts is required. This project examines the involvement of data mining techniques to facilitate that process. A dataset consisting of physicochemical properties of red wine samples is used to build data mining models to predict quality of wine. The use of machine learning techniques; specifically, binary logistic regression, classification trees, neural networks and support vector machines were explored, and the features that perform well on this classification were engineered. The performance of models is evaluated and compared by the metrics prediction accuracy and AUC (area under receiver operator characteristics curve).
Hareeshbabu Potheypalli, Labeling School Budget Data Using Machine Learning and NLP, August 2019, (Yan Yu, Yichen Qin)
The objective of the current analysis is to use the machine learning methods and NLP techniques to analyze text data. The data is collected from a competition hosted by ‘DrivenData.org’. The data set chosen is having the expense information for a school where each observation is labelled according to the department /object-bought / functionality / Class / user etc. Therefore, this is clearly a ‘Multiclass-Multilabel’ classification problem. Various models used by the contestants are analyzed and reviewed. Models such as simple Logistic Regression, OneVsRestClassifier, RandomForest, CountVectorizer etc. are used in classifying an observation into its corresponding class of each categorical variable. The models are then tuned further to improve the accuracy of the model and the log-loss cost. Also, the future scope and developments of the project are discussed further.
Bolun Zhou, Identify Heart Disease Using Supervised Learning, August 2019, (Yichen Qin, Charles Sox)
In machine learning, logistic regression is used for predicting the probability of occurrence of an event and the probability can be turned into a classification. Logistic regression extensively used in the medical and social sciences as well as marketing applications. It is used to perform on a binary response (dependent) variable. Moreover, CART can be used for classification or regression predictive modeling problems and provides a foundation for important algorithms like bagged decision trees, random forest and boosted decision tree. Especially, Random forest is an extension of Bagging, but it makes significant improvement in terms of prediction. In addition, artificial neural network (ANN) or connectionist systems are computing system that are inspired by the biological neural network that are similar to animal brains. The neural network is basically a framework for many different machine learning algorithms to work together and process the complex data inputs. In this project, we tried to use these techniques to improve the accuracy of diagnosis of heart disease. This study could be useful to predict the presence of heart disease in the patient or find any clear indications of heart health.
Sukanto Roy, FIFA 18 - Playing Position Analysis, July 2019, (Dungang Liu, Peng Wang)
FIFA 18 offers detailed quantitative information on individual players. In modern day football, specific positions represent a player's primary area of operation on the field. It is extremely important to characterize a player according to their position on the field. Each position requires a different combination of skills and physical attributes. With the rapid increase in the volume of soccer data, data science abilities have attracted the attention of coaches and data scientists alike. As a FIFA video game enthusiast and a soccer player, I took this opportunity to work on this problem using the FIFA18 data which is originally from sofifa.com but a structured version of the data was posted on tableau public website. The data is unique at player level, and each player has attribute (e.g. dribbling, aggression, vision) personal (e.g. club, wage, value) and playing position data (rating on various positions). To solve this problem, I have taken a machine learning approach. After data preparation and dimension reduction, 4 supervised learning statistical models were built: KNN, Random Forest, SVM and Neural Network. We classified the 15 playing positions into 4 positions and trained the models with the positions as our response and attributes as the predictors. KNN, SVM and Neural network models had accuracies of 81.81%, 82.27% and 82.26% on the test data. Only the random forest model had an accuracy lower than 80 – 71.32%. Any of the former 3 models can be used by coaches to support their methods and ideas for a player's playing position.
Joe Ratterman, Predicting Future NCAA Basketball Team Success for Schedule Optimization, July 2019, (Mike Fry, Paul Bessire)
Every year, 353 NCAA Division 1 basketball teams compete for 68 bids to the NCAA Men’s College Basketball Tournament. Of those 68 tournament bids, 32 are reserved for conference tournament champions – leaving 36 at-large bids. These bids are given out to the 36 teams that the selection committee deems the best of the rest. While the selection process is not set-in-stone, at-large teams historically have high Ratings Percentage Index (RPI) rankings. RPI was one of the primary tools used by the selection committee up until the 2018 season. Though the NCAA Evaluation Tool (NET) has replaced RPI as the primary evaluation tool, RPI still provides a quick comparison of teams that played different schedules. The calculation for RPI is as follow: RPI = (Win Percentage*0.25) + (Opponents’ Winning Percentage*0.50) + (Opponents’ Opponents’ Winning Percentage*0.25). This paper aims to develop a method to predict a win probability for each NCAA Division 1 program a year in advance. These probabilities will allow a team to simulate the outcome of all games in a given season and optimize their non-conference schedule.
Mahitha Sree Tammineedi, Analysis and Design of Balance Transfer Campaigns, July 2019, (Charles R. Sox, Jacob George)
Every year, banks make billions of dollars on credit cards, so they are always looking to get more debt. A balance transfer is a way of transferring credit card debt from one credit card to another credit card belonging to a different bank. To put simply, it’s a way to gain debt from the competition. This project seeks to analyze the performance of past Balance Transfer (BT) campaigns at Fifth Third Bank and improve the future campaigns by building a present value (PV) model to provide insights on which offers are the most profitable for each segment of customers considering factors such as balance during the promotional period and post promotional period, revenue from fees, closed accounts, charged off accounts, finance charges, and other expenses incurred. The insights uncovered in this study will be used to design future BT campaigns.
Jeffrey Griffiths, Dashboard for a Monthly Operating Report, July 2019, (Michael Fry, Chris Vogt)
Archer Daniels Midland (ADM) is an agricultural giant headquartered in Decatur, IL. In 2014 the company began a digital transformation of its business called 1ADM and moved its I.T. headquarters to Erlanger, KY. Within the I.T. office the Data and Analytics (D&A) team works on data management and data projects for the business. Each month, Sr. Director of Data and Analytics reports to the CIO about the progress her team has made. Currently, the visualizations used to show that progress require a lot of work from the Sr. Director and do not utilize best practices when it comes to data visualization. This summer I was part of an intern team that redesigned the Sr. Director’s Monthly Operating Report (MoR) with good data visualizations that could communicate the progress D&A has made month-over-month (MoM), while also reducing the amount of work the Sr. Director would need to do each month. The intern team met extensively with the Sr. Director and D&A team leadership to understand the story they were trying to tell with their progress metrics.
Avinash Vashishtha, Identification of Ships: Image Classification using Xception Model Architecture, July 2019, (Dungang Liu, Yiwei Chen)
Computer vision has been a booming field with numerous applications across various sectors. But the application which motivated me the most to take up a project in computer vision was Autopilot feature in Tesla. In this problem statement, A Governmental Maritime and Coastguard Agency is planning to deploy a computer vision based automated system to identify ship type only from the images taken by the survey boats. We will be creating a model to classify images into 5 categories- Cargo, Carrier, Cruise, Military, and Tanker. Data has been picked from a Computer vision competition hosted on ‘Analytics Vidhya’ website. Link of the problem statement is given below:
To classify images, we have used Xception model architecture and through transfer learning re-purposed it to solve our problem statement. The final trained model showed an accuracy of 96.2% with most of the error happening in cargo and carrier. Our Model would help classify ships or vessels into respective categories and would save Maritime and Coastguard agency crucial time to respond to any emergencies.
Aabhaas Sethi, Predicting Attrition of Employees, July 2019, (Yan Yu, Yiwei Chen)
Employee attrition can be detrimental to a company's performance in the long term. I have personally observed a negative impact on one of my past employer’s performance because of employee attrition. The objective of this project is to explore the factors that are related to employee attrition through data wrangling and building a model that could be used to predict whether an employee would leave the company or not. I have used different statistical techniques to predict employee attrition and compared the performance for those models. Further, I have explored different sampling techniques such as Over Sampling, Under Sampling, SMOTE, etc. as an attempt to manage the imbalance in the data set. There are only 16% positive response values. Finally, I have compared the predicting performance of the model built through the different sampling techniques with the original model with random sampling.
Anjali Gunjegai, Cost Analysis of Steel Coil Production, July 2019, (Charles Sox, Sabyasachi Bandyopadhyay) Since profitability of a product is the backbone of any product, BRS has decided to take a step towards estimating and optimizing the orders received by analyzing the cost going into producing a coil. This project analyses the various production units in the mill and estimates a cost that is associated with each step and with the help of dashboards, gives the company a look into the major factors contributing to the costs and the potential to optimize the processes. Apart from deriving the cost for a coil, the project also analyses the grades of steel produced and predicts the scrap mix consumed and the foreseen costs for the heats. This project gives a good roadmap to achieve a faster accounting for the costs incurred in the month and an automatic costing tool which calculates an estimate of the cost near real time.
Ashwita Saxena, Can Order Win Rate be Predicted Based on Timeliness of Response to Customer Emails, July 2019, (Peng Wang, Michael Fry)
Ryerson is a metal manufacturing company based in Chicago. Their main products include aluminum, stainless steel, carbon and alloys. Most of their customer interactions and transactions happen through emails. Customers request quotes via email and order products via email as well. Ryerson is currently trying to identify ways of increasing their revenue. They believe that an increase in the number of orders they obtain through email interactions could stimulate revenue growth. One critical variable that impacts their orders is the time in which their representatives reply to customer emails. This project aims at identifying the impact of email response time on order win rate, while also identifying other important factors that impact winning orders. The final models presented have been used for interpretation as well as strong predictions while maintaining model accuracy.
Asher Serota, Application of Business Analytics to Quantifying Reporting and Agent Data at American Modern Insurance Group, July 2019, (Michael Fry, Christopher Rice)
This capstone describes two data analytics projects – SharePoint Analytics Open Rate Report and SCRUB – that I performed for the Marketing/Sales Insight & Analytics Team at American Modern Insurance Group. The main goal of the former was automation and visualization of reporting process. The main goal of the latter project was automation and visualization of the agent data. Both required transition from Excel-based and often manual manipulation and entry of data. To automate the processes, I developed R code utilizing several packages, such as Tidyr and Dpylr, and I also used data cleaning and aggregation techniques. Additionally, I developed methods to visually represent the SharePoint Report, including in PDF and URL formats, and to streamline the SCRUB process.
Megan Eckstein, Texas Workers Compensation Analysis, July 2019, (Michael Fry, John Elder)
Great American Insurance Group (GAIG) writes a significant portion of its business in workers compensation. Because of its magnitude within the industry, looking into particular markets to target or avoid is important to help minimize losses paid on workers compensation claims. One of the subsidiaries of GAIG writes the majority of its business in Texas. To help this subsidiary reduce medical loss from claims, I analyze Texas workers compensation industry data to examine medical losses that have occurred within different markets. This data encompasses eleven years of claims. Based on this analysis, I recommend different market segments to target and avoid within the state of Texas.
Akshay Kher, Optimizing Baby Diaper Manufacturing Process, July 2019, (Mike Fry, Jean Seguro)
Currently, the defect rate for diapers manufactured by P&G is larger than desired. Due to this, a large amount of diapers have to be disposed of leading to substantial monetary loss. Any solution which can even marginally decrease this defect rate would be extremely useful for P&G. Hence, very recently P&G has started capturing data related to the diaper manufacturing process using plant sensors. Through the use of this data we aim to do the following: 1. Build a model that can predict whether a batch of baby diapers would be defective or not. 2. Understand and quantify the impact of input variables on the output variable i.e. defect flag.
Santosh Kumar Biswal, Telco Customer Churn Prediction, July 2019, (Dungang Liu, Yichen Qin)
Customer churn is the loss of customers. The goal of the project is to predict the churn rate of the customers for one the telecommunication client. Knowing how churn rate varies by time of the week or month, product line can be modified according to customer response. A very methodological approach has been followed. We start with data cleaning and exploratory data analysis following which various machine learning algorithms like logistic regression, Decision trees, Random forest used to formulate an appropriate model giving out the best results, i.e lowest misclassification rates. Random Forest found to be best model to predict churn rate and important factor contributing to churn rate is “Monthly Charges”.
Husain Yusuf Radiowala, Commercial Data Warehousing and MDM for an Emerging Pharmaceutical Organization, July 2019, (Michael Fry, Peter Park)
Pharmaceutical companies invest time in research and billions of dollars in launching a promising new drug only to see unsatisfactory sales numbers. Competing products, generics arrive quickly after launch, reducing the time in which a drug remains on the market. Therefore, a successful drug launch is critical in the organization’s success. Effective marketing enables this success. Health Care Providers (HCP’s) and other decision makers need to be communicated about the key clinical and non-clinical benefits of a product. The situation is even more vital for Emerging Pharma companies that lack the pecuniary resources of “Big Pharma” to absorb an unsuccessful launch. These organizations therefore tend to focus on an effective drug – launch strategy and use big data, commercial analytics, 3rd party healthcare data, patient information – available externally and build a blueprint before launch. Using external data poses a challenge, data quality, trust in the accuracy of external sources and integration of the data into a single system are key issues that organizations face. The project aims to define and design an analytics platform with Master Data Management (MDM)  capabilities for an Emerging Pharma company (Company A) which aims to launch its product (Product B) in Q1 2020, across its health care practice area (Practice C). This platform will generate a “Golden Profile”, which is a single source of truth across HCPs in Practice C, spanning from various commercially available data sources. It provides the basis for strategic business decisions pre and post launch of Product B.
Prakash Dittakavi, Eye Exams Prediction, July 2019, (Michael Fry, Josh Tracy)
Visionworks business drives mostly on comprehensive eye exams and exam conversion percentage. Due to inconsistencies in the number of customers who visit the store regularly, there are days when the stores couldn’t perform exams for all customers due to insufficient staff to match high traffic or perform fewer exams due to less traffic and being overstaffed. So, predicting the number of exams will help in optimizing the staff at the stores, thereby leading to an increase in revenues or decrease in costs. The objective is to predict the exams for every market separately as each market is different from other markets and the business is different for different markets. Random Forest model and Linear Regression are used to predict the number of exams for a week and to find the important features. Adjusted R-square is used to compare models.
Aniket Mandavkar, Energy Star Score Prediction, July 2019, (Yichen Qin, Edward Winkofsky)
The NYC Benchmarking Law requires owners of large buildings to annually measure their energy and water consumption in a process called benchmarking. The law standardizes this process by requiring building owners to enter their annual energy and water use in the U.S. Environmental Protection Agency's (EPA) online tool, ENERGY STAR Portfolio Manager and use the tool to submit data to the City. This data informs building owners about a building's energy and water consumption compared to similar buildings, and tracks progress year over year to help in energy efficiency planning. Energy Star Score is a percentage measure of a building's energy performance calculated from energy use. The objective of this study is to use the energy data to build a model that can predict the Energy Star Score of a building and interpret the results to find the factors which influence the score. We will use NYC Benchmarking data set that measures 60 energy-related variables for more than 11,000 buildings in New York City.
Sanjana Bhosekar, Sales Prediction for BigMart, July 2019, (Dungang Liu, Edward Winkofsky)
BigMart(name changed) is a supermarket that could benefit from being able to predict what are the properties of products and stores which play a key role in increasing their sales. The dataset provided has 8523 records and 11 predictor variables. The target variable is the sales of a particular product at an outlet. This is a typical task of performing supervised machine learning. For this project, a linear model, regression tree, random forest, generalized additive model, and neural network were tried and tested to predict the revenues in dollars. Item_MRP turned out to be the most important variable, followed by Outlet Type. This challenge was hosted on a website “Analytics Vidhya” and the metric chosen by them to assess the best model was RMSE. Going by it, Random Forest Model worked the best.
Shashank Bekshe Ravindranath, Exploratory and Sentiment Analysis on the User Review Data, July 2019, (Yan Yu, Edward Winkofsky)
Yelp.com is a crowd-sourced local business review and social networking site. Yelp users can submit a review of their products or services using a one to the five-star rating system and write their experience as a review in their words which acts as a guide for other users who want to use the specific product or service. Traditionally product feedback from users has been heavily dependent on getting customers’ ratings on a set of the standardized questionnaire but with the introduction of text-based data, there is an opportunity to extract much more specific information which can be leveraged to make better business decisions. This paper is interested in using the star rating to quantify the whole user experience and user-written text reviews to understand it qualitatively. Sentiment analysis (also known as opinion mining or emotion AI) using text analysis and data mining techniques will be performed. The data is systematically identified, extracted, quantified, and studied to understand subjective information. It enables understanding of the emotional or subjective mindset of the people which is quite hard to quantify.
Buddha Maharjan, Surgical Discharge Predictive Model, July 2019, (Dungang Liu, Liwei Chen)
A predictive model of surgical discharge helps how effectively hospitals coordinate care of their sickest patients who were leaving the hospital after a stay to treat chronic illness. This is measured through the discharge rate. Without high quality of care coordination, patients can bounce back from home to the hospital and the emergency room, sometimes repeatedly. This will increase hospital readmission. Therefore, better care coordination promises to reduce readmission rate which minimizes cost and improve patients’ lives. It also helps to figure out how many discharged patients are readmitted for re-surgery. The main purpose of this study is to develop a predictive model for surgical discharge. This dataset is taken from The Dartmouth Institute for Health Policy and Clinical Practice which contains year 2013, state labels data for the patient older than 65, both male and female patients who uses Medicare from 50 states, including DC and the United States. The dataset has 52 observations with 19 variables including 1 categorical and 18 numerical variables. The Exploratory Data Analysis and statistical modelling was used to analyze and develop a predictive model using StepAIC method respectively during the variable selection and model building process. The important variables such as X1 (Abdominal Aortic Aneurysm Repair), X2 (Back Surgery), X345 (Coronary Angiography, Coronary Artery Bypass, Percutaneous Coronary), X7 (Cholecystectomy), X10 (Knee Replacement), X13 (Lower Extremity Revascularization), X14 (Transurethral Prostatectomy) and X16 (Aortic Valve Replacement) are included in the final model. The predictive model in the form of multiple regression simply tells us the number of patients discharged after surgery. It helps a hospital to figure out how many of the surgically discharged patients are readmitted within 30-day periods or longer.
Don Rolfes, Stochastic Optimization for Catastrophe Reinsurance Contracts, July 2019, (Yan Yu, Drew Remington)
Reinsurance is essentially insurance, for insurance companies. It serves to reduce variation in a Primary Insurance company’s financial statements, to transfer risk to a Reinsurance company and can maintain financial ratios that are either required by law or desired by shareholders. As with any asset that a company purchases, several questions must be answered. What type should be bought? How much is enough? What is the best deal for what I’m willing to pay? Stochastic Optimization is a useful tool to answer these questions. This project uses a Random Search algorithm paired with a Monte Carlo simulation study in order to find “Optimal” Catastrophe Reinsurance structures. The results suggest a few simple calculations based on Benford’s law that can identify a Reinsurance structure that will perform well on an average basis.
Rahul Agrawal, Bringing Customers Home: Customer Purchase Prediction for an Ecommerce - Propensity to Buy (Predictions), July 2019, (Yichen Qin, Liwei Chen)
An e-commerce retailer Marketing team wants to improve revenue by performing customized customer marketing. For targeting and segmenting customers, we find customers’ propensity of buying a product in the next month. By prioritizing customers based on their respective purchase score, they can reduce the expense of marketing and get higher conversion rate and therefore better ROI. We can leverage customers’ past lifetime characteristics data since enrollment like customer type, engagement, website behavior, purchases and customer satisfaction with the company and predict their future purchase probability and revenue generation using Predictive Analytics and interpret the factors which influence Customer Purchase. We take a supervised learning approach using 2 Target variables, first, does the customer purchase in the next 30 days, second, the total revenue generated in a month from all purchases. First, we predict whether the customer will purchase in the next 30 days using Supervised Binary Classification, secondly, we predict the total revenue generated using Supervised Regression models. Gradient Boosting model performed best in terms of AUC of 0.82 and accuracy of 90%. Customers who visited recently on the website, had more recent orders, had items Added to Cart and higher overall purchase per month are more likely to purchase a product in the next month. Customers who answered that they will purchase 6 or more products in a year have more likelihood of purchasing in the coming month. A Marketing team can leverage this model for accurate personalized marketing, effective email campaigns, clarity of type of customers with their separation parameters and better customer experience.
Jeevan Sai Reddy Beedareddy, Identification of Features that Drive Customer Ratings in eCommerce Industry, July 2019, (Charles R. Sox, Vinay Mony)
In ecommerce websites, ratings given to a product are one of the most important factors which could drive sales. A higher rating given to a product might increase the trust in the same and can motivate other customers to make a purchase. There could be multiple factors which influence ratings given to a product i.e. delivery times of previous purchases, product description, product photos etc. Ugam, a leading next generation data and analytics company which works with multiple retailers wants to design an analytical solution that helps in identifying drivers of customers ratings. Since Ugam works with multiple retailers, the solution must be designed such that it is reproducible across multiple retailers with little manual intervention. Through this project we designed an analytical framework which takes ratings/reviews datasets as input, performs modeling techniques like regression, decision trees, random forest and gradient boosting machines, identifies the best performing model and outputs features which are important in driving the ratings. Variable selection is performed in linear regression and hyper parameter tuning is done in tree-based models to extract the best performing features. The entire process is automated and would require only datasets as input from the user.
Dharahas Kandikattu, Genre Prediction (Multi-Label Classification) Based on Movie Plots, July 2019, (Yichen Qin, Edward Winkofsky)
A genre is an informal set of conventions and settings that help in categorizing a movie. Nowadays filmmakers started making movies by blending the traditional genres like horror or comedy giving birth to produce new kinds of genres like horror comedies. As time is going by it is becoming harder to classify a movie into a single genre. Most of the movies these days fall under at least 2 genres. To help solve this problem of finding all the genres associated with the movies based on the plot of the movie, our traditional multi-class classification wouldn’t be very helpful. To solve this problem, I have used a concept called multi-label classification. In my project, I have discussed how we can predict all the genres associated with a movie just by looking at the plot of the movie with the help of NLP and multi-label classification using algorithms like Naïve Bayes and Support Vector Machines.
Nagarjun Sathyanarayana, Portuguese Bank Telemarketing Campaign Analysis, July 2019, (Yan Yu, Peng Wang)
The data is related with direct marketing campaigns (phone calls) of a Portuguese banking institution. The classification goal is to predict if the client will subscribe to a term deposit (variable y). The project will enable the bank to determine the factors which determines the customers' response to the campaign and establish a target customer profile for future marketing plans. The data was split in to Training (80%) and Test (20%) groups. The following algorithms have been employed: Logistic Regression, Classification Tree, Random Forest, Neural Network, Naïve Bayes.
Traditionally, statistical analysis is performed using SAS or R. However, in recent years, Python has developed into a preferred statistical analysis tool. But using Python as a standalone software does not provide operational efficiency. Improving the operational efficiency is crucial, especially while handling huge datasets especially in a Bank, which could have billions of datasets. To achieve this, I have made use of Apache Spark. Apache Spark is an open-source distributed general-purpose cluster-computing framework. Spark provides an interface for programming entire clusters with implicit data parallelism and fault tolerance. Spark also provides the handy PySpark integration that lets us run Python codes on top of the Spark terminal. This parallel processing enables faster handling of large datasets and implementation of more complex machine learning algorithms for more accurate predictions.
Ann Mohan Kunnath, Predicting the Designer from Fashion Runway Images with Computer Vision / Deep Learning Techniques, July 2019, (Yan Yu, Peng Wang)
From Coco Chanel to Alexander McQueen, every fashion designer has his/her unique signature to their fashion outfits. The ability to identify a designer based on the fashion accessory was a skill reserved only to the best of the best fashion connoisseur. However, the power to identify designer based on the fashion accessory is now becoming commonplace with the advent of computer vision. This capability is being piloted by many retailers and fashion magazines to increase their online sales and brand recognition. In this project, I’m building a computer vision model capable of predicting the fashion designer based on runway images. There are 50 classes of designers and the evaluation parameter that has been used is categorical accuracy. Network architecture and optimization algorithms are key to the performance of any neural network and hence I have focused on finding the optimal combination of these two parameters for this problem. For network architectures, DenseNet and ResNet have been leveraged as they help in overcoming the issue of vanishing gradient that occurs in deep neural networks. For optimization algorithms, Adam, stochastic gradient descent with momentum, and RMSprop have been leveraged. The results for each model on the training, validation and test sets were compared. It was the ResNet architecture with 18 layers combined with the Adam optimizer that worked best for this dataset.
Ashutosh Sharma, Term Deposit Subscription Prediction, July 2019, (Dungang Liu, Yichen Qin)
Promotion of services or products is done by either using mass campaign or direct marketing. Usually mass campaigns, focusing on large number of people, are inefficient and have low response rates. On the contrary, direct marketing focusses on a small set of people who are believed to be interested in the product. Hence attracting a higher response rate & bringing efficiency in the marketing campaigns. In this report, we are using Portuguese bank’s telemarketing data. The main idea of the project is to work on different techniques which could accurately predict the outcome of direct marketing and then compare the results. For this exploratory data analysis was done to understand the data and figure out if any relationships exist within the data. We then compared the various machine learning algorithms like logistic regression, Decision trees and Random forest to find out which algorithm can most accurately predict the outcome. It was found that random forest gave the most accurate results for predicting if the customer has subscribed for the term deposit.
Varsha Agarwalla, Measuring Adherence and Persistency of Patients towards a Drug Based on their Journey and Performing Survival Analysis, July 2019, (Michael Fry, Rohan Amin)
Client ABC is a large pharmaceutical company and is a client of KMK Consulting Inc. ABC has a diverse number of drugs in various disease areas. XYZ drug is a lifetime medicine prescribed in cases of chronic heart failure. It is priced around $4,000 annually. There are multiple reasons why patients do not take medication on a timely basis. Hence, non-adherence to prescription medications has received increased attention as a public health problem. The development of adherence-related quality measures is intended to enable quality improvement programs that align patient, provider, and payer incentives toward optimal use of specific prescribed therapies. The project shared in this report is calculation of these measures and based on that survival analysis has been performed. The client uses these metrics to track how their drug is performing in the market, potential patients who are consistent and later drop off, and based on that can plan the next steps.
Keerthi Gopalakrishnan, Sentiment Analysis of Twitter Data: Food Delivery Service Comparison, July 2019, (Yan Yu, Peng Wang)
Natural Language Processing (NLP) is a hotbed of research in data science these days and one of the most common applications of NLP is sentiment analysis. Thousands of text documents can be processed for sentiment (and other features including named entities, topics, themes, etc.) in seconds, compared to the hours it would take a team of people to manually complete the same task. Sentiment analysis is widely applied to voice of the customer materials such as reviews and survey responses. In this project the sentiment of tweets is identified with respect to food delivery services like Grubhub, Doordash, Zomato. The food delivery service is one of the largest customer review dependent industries. A collection of good reviews can change the company’s future in the league. Three approaches have been chosen for this project. One is the calculation of the sum of positives and negatives scores when compared with predefined positive and negative words. Second is Naïve Bayes’ using the sentiment package in R. Third is the syuzhet’s lexicons approach using the ‘syuzhet’ package in R. During the course of this project, we will be analyzing the most frequent words in each Food Delivery dataset, The 3 level emotion comparison of positive neutral negative, The 6 level emotion comparison of Joy, sadness, trust, fear, disgust, surprise, and a Word Cloud analysis. All three algorithms point out to one major result. That is, Grubhub has received more positive responses on twitter in comparison to Doordash and Zomato.
Tingyu Zhao, House Price Analysis: Ames Housing Data, July 2019, (Dungang Liu, Chuck Sox)
Real estate industry is growing rapidly in recent years. It is fascinating to find out which factor impacts the price of a house most and if there is a model to accurately predict house sales price. Consequently, I will solve the following questions in this project: 1. find out the most important variables in predicting house price. 2. Build statistical models to predict house price and try to decrease model MSE. To solve the problems above, I chose the Ames Housing Data, which contains data of the sales records of individual residential property in Ames, Iowa from 2006 to 2010. There are 80 variables and 2919 observations in the data set. I cleaned the data set, input missing values, conducted exploratory analysis and built two nonlinear regression models: Random Forest and Gradient Boosting to predict housing price. I found out that variable “GrLivArea (ground living area square feet)” is the most important variable to predict house price by two models. Random Forest model presented the lowest out of sample model MSE: 19.22 and the least difference between in sample MSE and out of sample MSE. Models presented very good results in predicting house price from the perspective of model MSE. Consequently, I found out the trend of sales price in real estate industry is organized and predictable.
Chase Williams, Examining the Relationship between Internet Speed Tests, Helpdesk Calls and Technician Dispatches, July 2019, (Charles Sox, Joe Fahey)
Customer experience is critical to the success of any company, but especially those that provide an intangible product or a service to their customers. Providers of high-speed internet face the challenge of providing the internet speeds purchased by customers regardless of the hardware and wireless speed limitations in place by the customers’ devices. Understanding the highest and lowest performing operating systems and browsers can help providers to maximize the customers’ experience. In addition, by examining the internet speed test and helpdesk call data, providers can gain the ability to predict a technician dispatch and possibly solve the issue prior to the customer request. Improving the customer experience by solving technical issues prior to the customer request could reduce churn and improve profitability.
Zarak Shah, Bank Loan Predictions, July 2019, (Yichen Qin, Edward Winkofsky)
This Data set was posted on Kaggle as a competition. The dataset on Kaggle had two data sets: one for training the model, this dataset had 100,514 observations and the testing dataset had 10353 observations. There were 16 variables in the training dataset and 15 variables in the testing dataset. We have to predict the Loan Status column in the training dataset, we will only be using the training dataset here since the dependent variable is not included in the dataset used for testing. For this Capstone we used Logistic Regression and Classification trees. We analyzed our results using AUC curve, ROC curve, Cost function and Logistic regression measures.
Pruthvi Ranjan Reddy Pati, Time Series Forecasting of Sales with Multiple Seasonal Periods, July 2019, (Dungang Liu, Liwei Chen)
Companies need to understand the fluctuations of demand to keep the right amount of inventory on hand. Underestimating demand can lead to loss of sales due to the lack of supply of goods. On the other hand, overestimating demand results in surplus of inventory incurring high carrying costs. Realizing demand makes a company competitive and resilient to market conditions. Appropriate forecasting models enable us to predict future demand aptly. This paper models the times series data of everyday store sales of an item across 5 years of sales history from 2013 to 2018. The data is split with the first 4 years of the data as Train and the last 1 year as Test to evaluate the performances of Time Series Forecasting techniques like ARIMA, SARIMA and TBATS. The data exhibits multiple seasonality with weekly and annual periods. This complexity of the data clearly shows the limitations of the ARIMA and SARIMA. TBATS performed the best providing a Train Absolute Mean Error of 0.124721 and a Test Absolute Mean Error of 7.236229. It was able to model both the weekly and annual seasonality along with the trend.
Vaidiyanathan Lalgudi Venkatesan, Marketing Campaign for Financial Institution, July 2019, (Dungang Liu, Liwei Chen)
Marketing campaigns are characterized by focusing on the customer needs and their overall satisfaction. There are different variables we need to take into consideration when making a marketing campaign, that determine whether the campaign will be successful or not: Product, Price, Promotion and Place. The data is related to direct marketing campaigns of a Portuguese banking institution. The Marketing Campaigns were based on phone calls. Often, more than one contact to the same client was required, in order to confirm if the product (bank term deposit) would be ('yes') or not ('no') subscribed. The goal is to predict if the client will subscribe to a term deposit or not; to identify strategies in order to improve the effectiveness of future marketing campaigns for the bank. In order to answer this, we have to analyze the last marketing campaign the bank performed and identify the patterns that will help us find conclusions in order to develop future strategies. The dataset consists of 11162 rows and 17 variables, including the dependent variable: ‘Deposit’. Statistical techniques such as Logistic Regression, Classification tree, Random Forest were used to classify customers. Random Forest performs best and returned the lowest misclassification rate and highest AUC. The most important variables from these methods in the order of importance are: Month, Balance, Age. From this we understand that the propensity of marketing conversion depends on which month of contact, balance of the individual and age of the customer.
Shriya Sunil Kabade, Customer Churn Analysis, July 2019, (Dungang Liu, Liwei Chen)
Customer loyalty is important for every business. Loyal customers help a company grow by engaging more and improving brand image. Due to intense competition in the telecommunication industry, retaining customers is of utmost importance. Churn occurs when a customer ceases to use the products or services offered by a company. Insights into customer behavior can help a company understand early indicators of churn and avoid churn of customers in the future. The goal of this project is to identify key factors that make a customer churn and predict whether a customer will churn or not. The data for this project is taken from IBM sample datasets. The data is that of a telecom company ‘Telco’ with 7 thousand records and 21 features. Customers who have churned within the last month have been flagged. The features include information about the customer account, demographic information and customer behavior information in the form of services that the customer has signed up for. Various binary classification models like logistic regression, random forest, XGBoost have been built and compared based on classifier performance and ability to correctly classify churned customers. The final XGBoost model classifies 88.6% of the churned customers correctly and is not able to capture only 58 instances of churned customers. This model can be used by the telecom company to target customers with a potential to churn and retain them.
Gopalakrishnan Kalarikovilagam Subramanian, Analysis of Over-Sampling and Under-Sampling Techniques for an Unbalanced Data Set, July 2019, (Dungang Liu, Yan Yu)
Fraudulent transactions after card hacking is becoming a major concern for credit card industries. It is becoming a major deterrent in customer usage of credit cards. The goal of this project is to build a model for detecting fraudulent transaction using previous documented data of fraudulent transactions. The data set contains 30 variables. Two of the variables are ‘Amount’ of the transaction and ‘Time’ of the transaction which is the time elapsed after the first transaction. The other 28 variables are named V1-V28 and are a result of Principal Component Analysis (PCA) transformation. The output variable - ‘Class’ is binary and hence is a classification problem. Therefore, the following methods are used: Logistic Regression, Decision trees, Random Forest, Gradient Boosting Machine (GBM) and Support Vector Machine (SVM). Over-Sampling and Under-
Sampling schemes are used to overcome the unbalance in the data set. Precision and Recall values are used as indicators of efficacy of a scheme. Over-sampling is leading to a good mixture of precision and recall values. Under-sampling is resulting in a very good recall value but very poor precision value. Among the modeling algorithms, Random Forest is performing best and giving very good precision and recall values. V14, V10, V12, V17 and V4 are the top five important variables which helps in determining whether a transaction is fraudulent or not.
Varsha Shiva Kumar, Recommendation System for Instacart, July 2019, (Dungang Liu, Liwei Chen)
Instacart is an online application through which customers can order groceries and get them delivered on the same day from nearby grocery stores. In an era of big data technologies, recommendation engines play a crucial role in increasing the number of purchases per customer for companies. With the objective of increasing purchases per customer, Instacart wants to build a robust and accurate recommendation system that will recommend customers to reorder products.
The goal of this project is to build a recommendation system which will identify products most likely to be reordered by customers in a given order. The data available is transactional data of orders from customers over time. It contains over 3 million orders from more than 200,000 Instacart users. The information in the set of relational datasets are order related details like order number, days since last order was placed by the user, the products bought in the order etc. Through feature engineering, new variables like total orders, total reorders, average basket size of each user, etc. were created to better understand the relationship between users and products that they order. Using Logistic Regression, Classification Tree, Adaptive and XG Boosting, the reorder flag was predicted for a product in an order. XG Boosting was chosen as the final model because of its high recall value. Order rate of a product by a user and number of orders between purchases of product were identified as the two most significant variable that impact the likelihood of a product purchase.
Shruti Arvind Jibhakate, Analysis and Prediction of Customer Behavior in Direct Marketing Campaigns, July 2019, (Dungang Liu, Yan Yu)
Marketing is aimed at selling products to existing customers and acquiring new customers. Out of various types of marketing, direct marketing is most effective. It allows targeting individual customers but is more expensive than other methods. This analysis will help predict customer’s propensity to subscribe to a term deposit with the bank based on the data collected through the telephonic direct marketing campaign. The goal is to predict whether a customer would subscribe to a term deposit or not, based on data collected from telephonic direct marketing campaigns conducted by the Portuguese banking institution. It will thus help enhance customer acquisition, cross-selling of products, improve targeting and hence increasing the return on investments for the marketing campaigns. The variables record the customer’s profile information, marketing campaign information and social and economic context attributes between May 2008 and November 2010. Exploratory data analysis and various statistical modeling approaches are undertaken to better understand the data and develop a robust prediction algorithm. This analysis uses Logistic Regression, Decision Tree, and Generalized Additive Model. Since this information is used for decision making, methods which differentiate based on controllable parameters are preferred. Based on this criterion, the Logistic Regression model is most interpretable and has the highest predictive power. The model classifies subscribers from non-subscribers based on client information – default status, contact type; campaign information – month, previous campaign outcome, number of contacts performed in current campaign and number of days since the customer was last contacted; and, socio-economic factors – number of employees and consumer confidence index.
Ruby Yadav, Bike Rental Demand Prediction Using Linear Regression & Advanced Tree Models, July 2019, ( Dungang Liu, Liwei Chen)
Bike Rental service is a popular business in USA nowadays full of students or tourists or due to traffic and health promotions. With the automated process of renting a bike on an as needed basis makes it very convenient for the consumers to rent a bike. In this project we need to predict the bike rentals demand for a Bike Rental Program in Washington DC. We are examining the impact of different factors like season, weather, weekend/weekday etc. in order to predict the demand. Since the response variable is continuous, we are using linear regression model to predict the demand. Advanced machine learning techniques like regression tree, random forest, bagging is also used to predict the demand and from these we have chosen the best model for rental demand prediction and determined the significant factors that actually make an impact on the number of bikes rented. Here we have chosen Random forest as the best method to predict the demand for the bikes as the mean squared error is least for Random Forest.
Charles Brendan Cooper, What Matters Most? Analyzing NCAA Men’s Basketball Tournament Games, July 2019, (Dungang Lui, Yan Yu)
Every year since 1939, the National Collegiate Athletics Association (NCAA) hosts its end-of-the-season single elimination tournament for Division 1 Men’s Basketball, commonly known as March Madness, to determine who will be the national champion. In its current form, the tournament consists of 64 teams from conferences across the nation divided into 4 sections. In recent history, spectators of the sport are becoming more and more interested in trying to predict how the tournament will play out. Who will be in the final four teams, what kinds of upsets will there be (lower seeded team beating a higher one), who will be the eventual national champion? All of these questions and more are debated upon by journalists, sports newscasters, and fans so much so that there is a name for it all, Bracketology. Using the data I have available, my goal is to provide what variables prove to be the most impactful for predicting the outcome of games within the tournament. This will offer insight into how teams might approach an upcoming game versus an opponent based on their attributes. Once the data set has been built from a group of tables provided by a Kaggle competition sponsored by Google (resulting in 99 variables and 1,962 observations), a stepwise variable selection process will be applied, and a final model built from those critical variables. This results in 17 core variables out of the total 99 available and an out-of-sample AUC of 0.787.
Beth Hilbert, Promotions: Impact of Mailer and Display Location on Kroger Purchases, July 2019, (Charles Sox, Yan Yu)
This project examined which promotions are most effective for pastas, sauces, pancake mixes, and syrups in Kroger stores. A dataset provided by 84.51 was used to analyze how weekly mailers and in-store displays correlate with sales (number of baskets) for each product. Random Forest, LASSO Regression, Hierarchical Clustering, and Association Rules were used to answer this question.
The first part of the analysis used Random Forest to determine which promotion types had the greatest influence on the number of baskets. Given these data, in-store end caps and interior page mailer placements had the most influence on purchases/baskets. The second part of the analysis used LASSO Regression and Hierarchical Cluster to identify similar products using product segmentation. Similar products were clustered and then analyzed to determine what differentiated the groups. This analysis showed that sauces appear four times as often in the cluster most responsive to promotions. Given these results, promoting sauces on end caps is recommended. The final part of the analysis used Association Rules to evaluate purchase pairings using market basket analysis. The analysis focused on the Private Label brand because it was available for both pastas and sauces. Given these data, promoting Private Label sauce on the back page of the mailer, instead of the interior page of the mailer, is recommended to increase the chance of pairing with Private Label spaghetti.
Rahul Muttathu Sasikumar, Credit Risk Modelling – Lending Club Loan Data, July 2019, (Yan Yu, Nanhua Zhang)
Credit risk refers to the chance that a borrower will be unable to make their payments on time and default on their debt. It refers to the risk that a lender may not receive their interest due or the principal lent on time. It is extremely difficult and complex to pinpoint exactly how likely a person is to default on their loan. At the same time, properly assessing credit risk can reduce the likelihood of losses from default and delayed repayment. Credit risk modelling is the best way for lenders to understand how likely a loan is to get repaid. In other words, it’s a tool to understand the credit risk of a borrower. This is especially important because this credit risk profile keeps changing with time and circumstances. As technology has progressed, new ways of modeling credit risk have emerged including credit risk modelling using R and Python. These include using the latest analytics and big data tools to model credit risk. In this project, I will be using the data from Lending Club which is a US peer-to-peer lending company, headquartered in San Francisco, California. The past loan data is used to train a machine learning model which identifies a loan applicant as risky of defaulting the loan or not.
Jyotsana Shrivastava, Factors Influencing Length of Service of Employees, July 2019, (Yan Yu, Dung Tran)
Macy’s has 587 stores in 42 states in US with 225,656 employees as of Dec’2017. These stores are divided into 5 geographical regions for retail sales. We had observed in the prior analysis with Macy’s People analytics team that average sales vs plan for all Macy’s stores has a negative relation with Length of service of employees. In this paper, Length of service of employees also being referenced as ‘LOS’ is analyzed with varied employee information as available through the HR information base. The analysis as conducted is for overall Macy’s stores and on a region level. Further deeper analysis is also conducted on furniture and non-furniture stores and region wise variation if applicable. The analysis is done using data mining fundamentals using R throughout the project. This paper would aid Macy’s to incorporate HR related changes as required on a region or store level. Key findings of the paper are that LOS has a positive relation with Average standard working hours of employees in the store and a negative relation with the number of full-time employees in the store. North-East region which includes Macy’s flagship store Herald square has the highest LOS amongst all stores and this region NE has a positive relation with LOS. The key results are summarized in the paper and detailed results are available upon request.
Xi Ru, Predicting High-Rating Apps, July 2019, (Yan Yu, Yichen Qin)
As there are so many applications developed each day, it’s difficult for the software developers to determine what kinds of applications will become popular after it is released and be rated with higher rating by the public. This project is created to predict the high rating applications on google play store so that the app developers can invest their time and resources properly to gain profit. In this project, both regression and classification models are built to find the “best” model by comparing their prediction accuracy. The criteria used in model assessments for regression models are AIC, BIC, Adjusted R-square, and MSE. The classification models are assessed by both in-sample and out-of-sample AUC and MR. To eliminate the impacts of different categories, the same data mining techniques applied for a single category, which is the largest category “Family” in the original dataset. The model with highest predictive accuracy for multiple categories is Random Forest, while the performance of predictive models for single category “Family” do not have significant differences.
Bharath Vattikuti, IBM HR Analytics: An Analysis on Employee Attrition & Performance, July 2019, (Yan Yu, Liwei Chen)
Attrition is a problem that impacts all businesses, irrespective of geography, industry and size of the company. Employee attrition leads to significant cost to business, including hiring expenses, training new employee along with lost sales and productivity. Hence, there is a great business interest in, understanding the drivers of and, minimizing the employee attrition. If the reasons behind employee attrition are identified, the company can create a better working environment for the employees and if employee attrition can be predicted, the company could take necessary actions to stop the valuable employees from leaving. So, this report aims to explore the HR dataset by IBM Watson Analytics, manipulate it to get some meaningful relation between response variable (whether an employee left the company or not) and dependent variables which provide information about an employee. Then, multiple predictive statistical models are built in order to predict the possibility of an employee leaving the firm and factors were studied by plotting variable importance. In order to evaluate the model performance, Prediction Accuracy, Sensitivity and AUC are considered. Of the different models-built, Support Vector Machines (SVM) was picked due to its higher F1 score, comparable accuracy.
Rashmi Prathigadapa, Movie Recommender Systems, July 2019, (Yan Yu, Edward Winkofsky)
A movie recommender system has gained popularity and importance in our social life due to its ability to provide enhanced entertainment. It employs a statistical algorithm that seeks to predict users' ratings for a particular movie, based on the similarity between the movies, or similarity between the users that previously rated those movies. This enables the system to suggest the movies to its users based on their interest or/and popularity of the movie. There are a lot of recommender systems in the existence, most of them either cannot recommend a movie to its existing users efficiently or to a new user. In this project, we not only focus on the recommender systems for an existing user based on their taste and shared interests but also a recommender system that can suggest the new users based on the popularity. The dataset used has 45,000 movies and all the information about cast, crew, ratings, keywords etc. We have built 4 recommender systems namely: Simple Recommender, Content Based Recommender, Collaborative Filtering, Hybrid Engine.
Paul Boys, Statistical Inference for Predicting Parkinson’s Disease Using Audio Variables on an At-Risk Population, July 2019, (Yan Yu, Edward Winkofsky)
Parkinson’s disease is a degenerative neurological disorder characterized by progressive loss of motor control. Approximately 90% of people diagnosed with Parkinson’s disease (PD) have speech impairments. Development of an audio screening tool can aide in early detection and treatment of PD. This paper re-examines research data of audio speech variables from recordings of three groups: 1) healthy controls, 2) patients newly diagnosed with PD and 3) an at-risk group. The focus of this paper is on accurately predicting Parkinsonism in the at-risk group. The original research reported a 70% accuracy using quadratic discriminant analysis (QDA). This paper examines QDA, linear discriminant analysis (LDA), support vector machines (SVM) and Random Forest with use of least absolute shrinkage and selection operator (LASSO) for feature selection. LASSO selected two variables. Utilizing these two LASSO variables, Random Forest had the best out-of-sample accuracy at 72%. SVM and Random Forest resulted in sensitivities superior to QDA and LDA. Utilizing model accuracy on the control and PD group as model selection criterion, the SVM with a Bessel kernel was chosen as the optimal model. This SVM model was 64% accurate when validated on the at-risk group. Human speech screening of the at-risk group resulted in correctly identifying speech impairments in 2 of the 23 Parkinson’s positive patients. This SVM model improved on the human performance by correctly identifying speech impairment in 8 of these 23.
Harish Nandhaa Morekonda Rajkumar, Improving Predictions of Fraudulent Transactions Using SMOTE, July 2019, (Yan Yu, Edward Winkofsky)
This project aims to predict whether or not a credit card transaction is fraudulent. On the highly imbalanced dataset, logistic regression and random forest models are applied to understand how well the true positives are captured. Two sampling techniques - Random Oversampling and SMOTE are explored in this project. SMOTE stands for Synthetic Minority Oversampling Technique, a process in which synthetic instances are generated from the minority feature space to offset the imbalance. The models are applied again on the resampled data, and the area under the ROC and PR curves are observed to increase sharply. With SMOTE data, it is also observed that there is a sharp drop in the false positives, reducing by up to 38% and possibly leading to hundreds of thousands of dollars in cost savings. The threshold range is also found to increase, allowing more room for the model to be flexible.
Shagun Narwal, Analysis of e-Commerce Customer Reviews and Predicting Product Recommendation, July 2019, (Dungang Liu, Yichen Qin)
The dataset used for the project belongs to the e-commerce industry, specifically a women’s clothing website. In the last 2 decades, the e-commerce industry has consistently leveraged data to improve sales, advertisement and customer experience. Customers on a women’s e-commerce website have provided reviews and also voted whether they will recommend the product or not. This data was analyzed to generate insights in the e-commerce product reviews and recommendations space. Also, sentiment analysis was performed and used to understand the association between review words and customer sentiments. Further, the reviews were used to develop a model which can predict whether the person will recommend the product or not.
Lissa Amin, Psychographic Segmentation of Consumers in the Banking Industry, July 2019, (Michael Fry, Allison Carissimi)
The competitive landscape of the banking industry has forced traditional retail banks to shift their focus towards becoming more consumer-centric organizations and maintain levels of service and convenience that compete with the experiences consumers have both within and outside the industry. In order to be a truly customer-centric organization, there must first be a true understanding of who the consumer is which includes their needs, attitudes, preferences and behaviors. Market segmentation which aims to identify the unique groups of consumers that exist within the market based on shared characteristics is critical to understanding the consumer. Bank XYZ is one example of a traditional retail bank that has adopted more customer-centric values and is working to redefine the way they build products, services and marketing campaigns in order to drive value for both the customer and the bank. This analysis focuses on a psychographic segmentation of the consumers within Bank XYZ’s geographic footprint and identifies the unique groups that exist based on their attitudes, needs, behaviors and beliefs.
Harsharaj Narsale, Owners’ Repeat Booking Pattern Study and Forecasting, July 2019, (Charles Sox, Andrew Spurling)
NetJets Inc., a subsidiary of Berkshire Hathaway, is an American company that sells part ownership or shares (called fractional ownership) of private business jets. Accurate demand forecasting is essential for operational planning. Fleet management plays an important role in operations. Fluctuating demand with high variance needs to be fulfilled daily on time without declining any requesting flight to keep reputation of the company on high stature. The company has its own fleet as well as it can subcontract aircrafts from other companies on a temporary basis. Subcontracts are costly and hence need to be avoided, if possible. Subcontracted flights can be avoided by detailed planning based on accurate forecasts. Flight demand is currently being forecasted from last 5 years using the time series models built in SAS enterprise with an accuracy of ~96% in forecasting the total number of flights booked. As most of the owners are business or sport personnel, flights booked for annual business meetings or sport events are expected to show certain patterns. Owners’ repeat booking behavior can help in fine-tuning demand forecasts. Booking pattern has been analyzed in this project across 365/366 days of the year. Autoregressive time series model is built with an MAPE error rate of 10.75% for repeat percentage. Temporal aspects of flight booking in advance across new and repeat bookers has been analyzed to improve demand forecast for a flight day well in advance.
Neha Nagpal, Predicting Dengue Disease Spread, July 2019, (Dungang Liu, Chuck Sox)
Dengue fever is a mosquito-borne disease that occurs in tropical and sub-tropical parts of the world. Because it is carried by mosquitoes, the transmission dynamics of dengue are related to climate variables such as temperature and precipitation. In this project, various climatic factors are analyzed to generate a model for predicting the number of cases of dengue in the future, which in turn would help public health workers and people around the world take steps to reduce the impact of these epidemics. The data is provided by U.S. Centers for Disease Control and Prevention for two cities: San Juan, Puerto Rico and Iquitos, Peru. Various statistical methods have been used to find the best model as per the data. Finally, Support Vector Machine provided the lowest Mean Absolute error which makes it a suitable model for predicting the number of dengue cases in the future. From the analysis, we also found that humidity in the air, high temperature and some specific seasons result in a greater number of dengue cases.
Swagatam Das, IMDB Movie Score Prediction: An Analytical Approach, July 2019, (Dungang Liu, Liwei Chen)
Films have always been an integral part of the world of entertainment. They can be used as a medium to convey important messages to the audience and also a creative medium to portray the fictional world. A filmmaker’s aspiration is not only to achieve commercial success but also to gain critical acclaim and content appreciation by the audience. The most commonly used metric for filmmakers, audience, critics, etc. is the IMDB Score. This score out of 10 marks the overall success or failure of a film. In this project, I have studied the factors that affect the final IMDB Score right from popularity of Actors/Directors to commercial aspects like Budgets and Gross Earnings. The intent is to help future filmmakers make educated decisions while creating films. The data has been sourced from Kaggle which was originally pulled from the IMDB website. I have used Data Visualizations and Machine Learning Algorithms to make predictions regarding the response i.e. the IMDB score. I have concluded that total number of users who voted for the movie, duration of the movie, budget and gross earnings of the movie are important factors that determine the IMDB score and would recommend future film makers to look into these factors before producing/directing films. I have used different models to assess the prediction accuracy of the IMDB Score. From the analysis, Random Forest Algorithm had the best accuracy rate of 78.42% compared to 75.65%, 78% and 77.5% for Multinomial Logistic Regression, Decision Tree and Gradient Boosting respectively.
Akshay Singhal, Vehicle Loan Default Prediction, July 2019, (Dungang Liu, Yichen Qin)
The major chunk of the income for banks comes from the interest earned on loans, but loans can be risky too. Banks must deal with the risk to reward ratio for any kind of loan. This is where credit scoring comes in. Loan defaults will cause huge losses for the banks, so they pay much attention on this issue and apply various methods to detect and predict default behaviors of their customers. In this report, we attempt to predict the risk of the loan being default based on the past data. The data was obtained from Kaggle. The data contains the information about the customers from the Indian Subcontinent. The main idea of the project is to find out the factors responsible for the loan default. For this Exploratory Data Analysis was done to understand the data better and to study the relationship between various variables then a comparison of the performance and accuracy of various machine learning algorithms like logistics regression, Random forest and Gradient Boosting is done to find out which technique works best in this scenario. It was found that the loan default is highly influenced by the loan amount and the customer’s credit history. Random forest gave out the best results for the prediction of default based on the data.
Mrinal Eluvathingal, A Machine Learning Walkthrough, July 2019, (Peng Wang, Ed Winkofsky)
The main goal of this project is to provide a machine learning walkthrough of a dataset and through the process of Data Munging, Exploration, Imputation, Engineering and Modeling show that the stages of Preprocessing and Feature Engineering are the most important, and is the foundation upon which a model can be more powerful. Using the Ames Housing Dataset we perform Exploratory Data Analysis and Feature Engineering and Selection using advanced techniques including an innovative new method for feature creation, and compare different machine learning algorithms and analyze their relative performance. This project, titled ‘A Machine Learning Walkthrough’ lays emphasis on the most important part of the Data Science problem which is data preparation.
Margaret Ledbetter, The Role of Sugar Propositions in Driving Share in the Food and Beverage Category, April 2019, (Yan Yu, Joelle Gwinner)
Sugar continues to be a “hot topic” for [food and beverage] consumers and a driver of recent buyer and volume declines in the aisle. To date, there has been limited understanding of consumer preferences for specific sugar ingredients – i.e., natural vs. added – and lower sugar propositions. This research seeks to understand the role of sugar ingredient and lower sugar propositions as well as other factors in the [food and beverage] consumer purchase decision, including: brand, variety, all natural claim, and added benefit. The insights uncovered in this research will be used to inform [Client] line optimization and new product development for FY20 + beyond.
Jacob Blizzard, Pricing Elasticity Evaluation Tool, April 2019, (Yan Yu, Chad Baker)
EG America is looking to maximize profits for their beer category through pricing analytics. Pricing analytics is at the core of profitability, but setting the right price to maximize profits is often difficult and extremely complex. This project aims to create a tool that recommends the optimal price to maximize profit by using historic sales data and the price elasticity of demand for top selling items within each state in which EG America operates. The tool compiles sales data queried from internal data systems and market research data from Nielsen and calculates the optimal price to set for each item by using the elasticity coefficient and the cost of each item. Setting the correct price for beer in convenience stores is of utmost importance due to the customer base that is exceedingly price aware and very sensitive to price changes.
Daniel Schwendler, Single Asset Multi-period Schedule Optimization, April 2019 (Mike Fry, Paul Bessire)
In a production environment, the capacity to produce finished materials is the primary focus of operations leadership. Sophisticated systems surround the scheduling of production assets and resources are dedicated to making the most with what capacity is available. The two primary changes that impact a production environment’s ability to increase production are efficiency and total asset availability; in other words, increasing production with current assets or increasing the total potential for production through increases in staffing or production equipment. In many environments, the purchasing of production equipment is a sizable capital expenditure that is not an option or requires comprehensive justification. In a continuous flow example, the scheduling of a single machine can drive the entire supply chain. The production schedule of this machine is critical. Operations management relies on production and scheduling to steer the business. In these cases, the application of optimization provides objective recommendations and isolates skilled resources on decision making. In this paper, we will explore the application of mixed integer linear optimization in a continuous flow environment as an enterprise resource planning tool. An optimal master production schedule alone adds value in understanding machine capabilities to meet demand, while it also informs many other facets of the business. Material requirement planning, Inventory management, sales forecasting, required maintenance and supply chain logistics are all critical considerations.
Khiem Pham, Optimization in Truck-and-Drone Delivery Network, April 2019, (Leonardo Lozano, Yiwei Chen)
With the introduction of unmanned aerial vehicles (UAV), also known as drones, several companies with shipping service promised to greatly cut down the delivery time using these devices. One of the reasonable methods to use the drones is to launch them not directly from the shipping centers, but from the normal delivery trucks themselves. With multiple vehicles delivering at the same time, this can save a lot of time. In this paper, we discuss a general approach to the problem from an optimization point of view. We consider different drones’ specifications as well as the number of drones to deploy. We aim to formulate a model that can return optimal vehicle routes and measure the computational expense of the model.
Lauren Shelton, Black Friday Predictions, April 2019, (Dungang Liu, Liwei Chen)
In the United States, the day after Thanksgiving is known as Black Friday, the biggest shopping day of the year. Stores offer their best sales to kickoff the holiday season. Store owners could benefit from being able to predict what customers want to buy, how much they are willing to spend, or the demographic of customers to target. For this project, a linear model, generalized additive model, neural network model, and classification tree model are used to predict purchase prices in dollars. All predictor variables, including gender, age, marital status, city category, years in city, occupation category, and product categories, were important. The final model chosen was the linear model, which performed best.
Niloufar Kioumarsi, Mining Hourly Residential Energy Profiles in order to Extract Family Lifestyle Patterns, April 2019, (Yichen Qin, Peng Wang)
This study presents a new methodology for domestic hourly energy time series characterization based on hierarchical clustering of seasonal and trend components of energy load profiles. It decomposed energy time series in to their trend, seasonal and noise components. It segmented households into two groups through clustering their trend components. In order to interpret the trend clustering results, it looked at the correlation of energy time series in each cluster with weather. The study also examined the influence of household characteristics on patterns of electricity use. Each trend-cluster was linked to household characteristics (house age and size) by applying a decision tree classification algorithm. Finally, the seasonal component of energy profiles were used to cluster customers based on family lifestyle patterns. This study constructed 6 profile classes/typical load profiles reflecting different family lifestyles, which can be used in various energy saving behavioral studies.
Mark McNall, From Sinatra to Sheeran: Analyzing Trends in Popular Music with Text Mining, April 2019, (Dungang Liu, Edward P. Winkofsky)
Starting in late 1958, Billboard Magazine’s Hot 100 became the single, unified popularity chart for singles in the music industry. Because music is such a universal and beloved form of art and entertainment, exploring how popular music has changed over the years could provide interesting and valuable insight both for consumers and for the music industry (musicians, songwriters, lyricists). One way to explore trends in music is analyzing their lyrics. This project aims to analyze the lyrics of every #1 hit over time by using a variety of text-mining applications such as tokenization, TF-IDF ratio, lexical density and diversity, compression algorithms, and sentiment analysis. After extensive research, results showed #1 hits have steadily gotten more repetitive over time, as popular songs have had a declining lexical density and increasing compression ratios. Sentiment analysis showed that popular music has also gotten more negative, and emotions such as anger and fear are more prevalent in lyrics than positive emotions such as joy compared to the past. Finally, the usage of profanity in popular music has skyrocketed in the last two decades, showing that music has not only got more negative but also more vulgar.
Laura K. Boyd, Predicting Project Write Downs, May 2019, (Edward Winkofsky, Michael Fry)
Company A is a national engineering consulting firm that provides multi-media services within four distinct disciplines: Environmental, Facilities, Geotechnical, and Materials. The goal of this project is to investigate the amount of project write downs for the Cincinnati office, specifically for the Environmental Department over the past four years. Preliminary review of Company A’s data indicates that the average monthly write downs for the Environmental Department is approximately $17,000. This analysis will use linear regression to explore the relationships of project data for the Cincinnati office between 2015 and 2018. Backward selection was utilized to select predictors and removed one at a time if determined that the predictor variable does not contribute to the overall prediction. The following limitations were encountered during this analysis: available data analytics tools and data integrity. As part of the BANA program I was exposed to multiple data analytical tools including R, SAS, and Microsoft Excel. Company A does not utilize R or SAS; therefore, Microsoft Excel was used for this analysis. When dealing with data its integrity is always a concern, especially when your data relies heavily on user inputs. The data used in this analysis was exported from a project management database. The data in the database is entered by each project manager and relies on accurate and up-to-date entries.
Joe Reyes, Cincinnati Real Estate – Residential Market Recovery, May 2019, (Shaun Bond, Megan Meyer)
During the Recession of 2007-2009, real estate was affected nationwide. Local homeowners in the Cincinnati tri-state also felt the impact of the downturn. The Hamilton County Auditor’s Office maintains and publishes real estate sale records. This data is useful in evaluating not only the general market for different neighborhoods, but also, how much local property values were influenced by the recession. Historical sales volumes and values provide insight into the overall character of real estate values as a function of property sales. Further, consideration of market supply and demand during the same period gives a view into the drivers behind the decline and rebounds around the recession. This brief summarizes residential trends using the above data from the years 1998 through 2018 for Hamilton County. Comparison to national and regional information to this local information gives an idea of how Cincinnati residents fared compared to the Midwest and USA.
Poranee Julian, A Simulation Study on Confidence Intervals of Regression Coefficients by Lasso and Linear Estimators, May 2019, (Yichen Qin, Dungang Liu)
We performed a simulation study to compare the confidence intervals of regression coefficients by Lasso (a regression analysis method that performs both variable selection and regularization in order to enhance the prediction accuracy and interpretability of the statistical model it produces) and linear regressions. We studied five cases. The first three cases contains three different numbers of independent regressors. In the fourth case, we studied a data set of correlated regressors with a given correlation matrix Toeplitz. The last case is similar to the fourth case but the correlation matrix given by AR1. The results showed that linear regression slightly performed better. However, Lasso regression gave effective models as well.
David Horton, Predicting Single Game Ticket Holder Interest in Season Plan Upsells, December 2018, (Yan Yu, Joseph Wendt)
Using customer data provided from the San Antonio Spurs, a statistical model was built that predicts the likelihood that an account which only purchased single game tickets in the previous year will upgrade to some sort of plan, either partial or full season, in the current year. The model uses only variables derived from customer purchase and attendance histories (games attended, tickets purchased and attended, money spent) over the years 2013-2016. The algorithm used for training was the Microsoft Azure Machine Learning Studio implementation of a two-class decision jungle. Training data was constructed as customers who had purchased only single game tickets in the previous year. This data was split randomly so that 75% was used for training and 25% for testing. In later runs, all data from 2016 was withheld from training and testing as a validation set, as noted in the results section. The final model (including 2016 data in training) shows a test accuracy of 84.9%, where 50% accuracy is interpreted as statistically random and 100% yields only perfect predictions. This model is likely to see improvements in predictive power as demographic information is added, new variables are derived, the feature selection method becomes more sophisticated, the model choice becomes more sophisticated, model parameters are optimized, and more data becomes available.
Ravi Theja Kandati, Lending Club – Identification of Profitable Customer Segment, August 2018, (Yan Yu, Olivier Parent)
Lending club issues unsecured loans to different segments of customers. The interest rate for the loan is dependent on the credit history of the customer and various other factors like income levels, demographics, etc. The data of the borrowers is public. The objective is to analyze the dataset and identify the good customers from the bad customers (“charged off”) using machine learning techniques. This dataset falls under the category of class imbalanced dataset as the number of good customers are far greater in number than the number of bad customers. As this is a typical classification problem, CatBoost technique is used for modelling.
Pengzu Chen, Churn Prediction of Subscription-based Music Streaming Service, August 2018, (Dungang Liu, Leonardo Lozano)
As a well-known subscription business model, paid music streaming became the largest recorded music market revenue source in 2017. Churn prediction is critical for subscriber retention and profit growth in a subscription business. This project uses a leading Asian music streaming service’s data to identify parameters that have an impact on users’ churn behavior and to predict churn. The data contains user information, transaction records and daily user activity logs. Prediction models are built with logistic regression, classification tree and support vector machines algorithms, and their performances are compared. The results indicate that classification tree model has the best performance among the three in terms of asymmetric misclassification rate. The parameters that have a big impact on churn are whether subscription auto-renew is enabled, payment method, whether the users cancel the membership actively, payment plan length, and user activities 0-2 days before subscription expires. This informs the service provider where customer relationship management should focus.
Tongyan Li, Worldpay Finance Analytics Projects, August 2018, (Michael Fry, Tracey Bracke)
Worldpay, Inc. (formerly Vantiv, Inc.) is an American payment processing and technology provider headquartered in the greater Cincinnati area. As a Data Science Analytics Intern, I directly work with the Finance Analytics team on multiple projects. The main purpose of the first project is to automate the process that used to be manually accomplished within different databases, RStudio was used and substantially reduced the time required to produce flat files for further usage. In the second project, the year-over-year (YoY) average ticket price (AVT) growth was analyzed. The Customer Attrition project focuses on the study customer’s attrition behavior.
Navin Mahto, Generating Text by Training a Recurrent Neural Network on English Literary Experts, August 2018, (Yan Yu, Yichen Qin)
Since the advent of modern computing we have been trying to make computers learn and respond in a way unique to humans. While we have chatbots which mimic human response by pre-coded answers, they are not fluid or robust in their response. In our project we would like to train a Recurrent Neural Network on an English Classic “War and Peace” by Leo Tolstoy and make it generate sentences similar in nature and structure to the language in the book. The sequential structure of RNN and its ability to retain previous inputs make them ideal to learn a literary style of the book. On increasing the length of RNN and epoch values, the error decreases from max of 2.9 to 2.2, and we see that the text generated resembles closer to English language.
Non-coherent output: “the soiec and the coned and the coned and the cone”.
Slightly coherent output: “the sage to the countess and the sale to the count”.
Zach Amato, Principal Financial Group: GWIS Portfolio Management Platform, July 2018, (Michael Fry, Jackson Bohn)
The overall goal of the GWIS Portfolio Management Platform project is to help bring together the disparate tools, research, and processes of the PPS boutique into as few locations as possible. Throughout the summer, we have started prototyping the Portfolio Viewer module and putting structure around the Research Module. In doing this, data management and data visualization skills have been used to meet the needs of the project and of the business. Future steps in the project will include completing current work and the modules in process and engaging in the Portfolio Construction and Trading modules. Future work will require data management, data manipulation, statistical testing, and optimization.
Nicholas Charles, Craft Spirits: A Predictive Model, July 2018, (Dungang Liu, Edward Winkofsky)
A new trend driving growth in the spirits industry is craft. Craft spirits are usually produced by small distilleries that use local ingredients. In the US, the spirits industry is structured as a three-tier system with manufacturers, distributors, and retailers. In certain states, the state government controls a portions of the three-tier system. For instance, the State of Iowa controls the distribution. The state purchases product from the manufacturers and subsequently sells to private retailers in the state. In doing so, the state tracks all transactions at the store level and makes available this data to the public. This project takes that open data and builds a logistic regression model that can be used to predict the outcome of a transaction as either a craft purchase or noncraft purchase. This information may prove useful to distilleries and distributors that specialize in craft by helping to pinpoint where their resources should be focused.
Keshav Tyagi, CC Kitchen’s Dashboard, July 2018, (Michael Fry, Harrison Rogers)
I am working as a Business Analyst Co-Op with Project Management Operations Division within the Castellini Group of Companies providing Business solutions to CC Kitchens, which is one of its subsidiaries specializing in Deli and Ready to eat products. The project, which I was assigned to, aims at creating an executive level dashboard for CC Kitchens visualizing important business metrics, which can assist top-level executives in making informed decisions on a day-to-day basis.
My responsibilities include but are not limited to interacting with different sectors within the company to identify the data sources for the above metric, data cleansing, creating data pipelines, preparing data through SQL stored procedures and creating visuals over them in a tool called DOMO. The data resided in flat files, Excel sheets, emails, ERP, API’s and I created an automated data flow architecture to collect and dump data at a centralized SQL warehouse.
Swidle Remedios, Analysis of Customer Rebook Pattern for Refund Policy Optimization, July 2018, (Michael Fry, Antonio Lannes Filho)
Priceline offers lower rates to its customers on certain deals which are non-cancellable by policy. In order to improve customer satisfaction, certain changes were deployed in June 2015 to make exceptions to these policies and refund the customers. These exceptions are only applied to cancel requests that fall under Priceline’s predefined categories/cancel reasons. In this paper, the orders processed under Priceline’s Cancel and exception policy will be analyzed for two of the top cancel reasons. The goal is to determine if the refunds are successfully driving customer behavior and repurchase habits. The insights obtained from the analysis will help the Customer care team at Priceline redesign and optimize the policies for each of the cancel reasons.
Rashmi Subrahmanya, Analysis of Tracker System Data, July 2018, (Michael Fry, Peter M. Chang)
Tracker system is an internal system in Boeing which records requests from employees working on the floor. Based on the nature of request, they are directed to a respective department. Standards organization is responsible for supply of standards (such as nuts, bolts, rivets) for assembling aircraft. Any request related to standards such as missing or defective or insufficient number of standards are directed to Standards organization, which then resolves the request. The resolution time and in fact, the requests directly impact the aircraft assembling process. The project focuses on analysis of tracker request data to identify patterns in the data. Data is analyzed on two key metrics - number of requests and average resolution time of the requests. The top problem type names, area of aircraft, hour and day with highest requests have been identified. This would help understand the reasons behind these requests and help take preventive action such as increase staffing at a particular time of the day so that the requests are resolved quicker. Two dashboards were developed to show active number of requests and to show the requests by Integration Centers for 7XX program.
Spandana Pothuri, Data Instrumentation and Significance Testing for a Digital Product in the Entertainment Industry, July 2018, (Dungang Liu, Chin-Yang Hung)
The entertainment technology industry runs on data. As entertainment is created, unlike a more need-based industry like agriculture, it is important to see how the receiver uses the end product. Based on the feedback loop, more products are created or existing products are made better. How a user uses an application, determines how its next version is built. In this world, clicks translate to dollars, and data is of utmost importance. This paper focuses on the cycle of data in a technological project, starting from instrumentation and tracking to reporting and deriving the business impact of the product. The product featured in this paper is Twitch’s extensions discovery page. The goal of launching this product was to the increase visibility for extensions. This product succeeded, increasing viewership by 37%.
Sourapratim Datta, Product Recommendation: A Hybrid Recommendation Model, July 2018, (Michael Fry, Shreshth Sharma)
This report provides a recommendation of products (movies) to be licensed for an African country channel. The product recommendations are based on its features such as genre, release year, US box office revenue etc. and its performance on other African and worldwide channels. A hybrid recommendation model combining the product features (Content Based Recommendation) and the performance of the products (Collaborative Filtering model) has been developed. For the content-based recommendation, a similarity matrix is calculated based on the user preferences of the market and the most similar products are considered. To calculate the performance of the products that have not been telecast in the African channels, a collaborative filtering model is trained on the known performance indexes. From the predicted performance of the products, the top products are considered. Finally, combining the considered products from both the methods, a final list of products has been recommended by giving equal weightage to both methods.
Akhil Gujja, Hiring the Right Pilots – An Analysis of Candidate Applications, July 2018, (Michael Fry, Steven Dennett)
Employees are an asset to any organization, and the key to any firm’s success. For a company to grow, flourish, and succeed, the right people must be hired for the job from the start. Hiring the right personnel is a time consuming and a tedious task for any organization. Especially, in the aviation industry, where safety and reliability are of utmost importance, hiring the right pilots is critical. Even under ideal situations, hiring pilots can be an arduous task. It is extremely difficult to predict exactly how well pilots will perform in the cockpit. It is because a pilot’s future performance cannot just be predicted based on academic performance or historical flying metrics. It depends on a lot on non-quantifiable metrics. Candidate profiles are analyzed to understand the profiles that made through the selection process, and the ones that did not make it through the resume screening process. This analysis can be used by the recruiters to rank candidate profiles and expedite the hiring process of top ranked candidates.
Yang He, Incremental Response Model for Improved Customer Targeting, July 2018. (Dungang Liu, Anisha Banerjee)
Traditional marketing response models score customers based on their likelihood to purchase. However, among potential customers, some customers would purchase regardless of any marketing incentive while some customers would purchase only because of marketing contact. Therefore, the traditional predictive models sometimes lead to money wasting on customers who would shop regardless of marketing offers and customers who would stop shopping if you ‘disturb’ them with marketing offers. The Oriental Trading Company Inc., a company with catalog heritage, does not want to send any catalogs to the customers who would purchase naturally for cost saving and profit maximization. For my internship, the main objective is to distinguish customer groups that need catalogs to shop from customer groups that will shop naturally or will not shop if given marketing incentive using incremental response model in SAS Enterprise Miner. This report shows that the basic theory of the incremental response model and how the model is applied to an Oriental Trading Company dataset. A combined incremental response model was successfully built using demographic and transactional attributes. The estimated model identified that incremental response was 11.9%, which was 1.7 times higher than baseline incremental response (7.2%). The model was used to predict customers’ purchase behavior in future marketing activity. Additionally, from the outputs of modeling, we identified that the overall number of orders, sales of some major products and days since first purchase were the most important factors affecting customers’ response to the mailed catalogs.
Nandakumar Bakthisaran, Customer Service Analytics – NTT Data, July 2018, (Michael Fry, Praveen Kumar S)
The following work describes the application of data analysis techniques for a healthcare provider. There are two tasks covered here. The first is an investigation to identify the root cause of an anomalous occurrence in a business process. The average of the scores measuring agent performance on a call exhibited an unusual rise starting 2018. The chief cause was identified to be a deviation from standard procedure by evaluators. Naturally, the subsequent recommendation was to ensure greater adherence to the procedure followed. The second task follows it with scrutiny of the single scoring benchmark used for different types of incoming calls and how it falls short of measuring performances in an accurate manner. Probability distributions were attempted to be fit to the underlying data for each type to check for any inherent distributions. The conclusion was to employ a type-specific system of scoring using point estimates obtained from existing data.
Christopher Uberti, General Motors Energy/Carbon Optimization Group, July 2018, (Michael Fry, Erin Lawrence)
This capstone outlines a strategy for implementing improved statistical metrics used for analyzing General Motors (GM) factories. Current GM reporting methods and data available are outlined. Two methodologies are outlined in this paper for improved metrics and dashboards. The first is an analysis of individual HVAC units within a factory (of which each factor has dozens) in order to identify units that be performing poorly or are not set to correct modes. The second methodology is creating a prediction model for overall plant energy usage based on historical data. This would provide plant operators a method for comparing current energy usage to past performance while taking into account changes in weather, production, etc. Finally some potential dashboards are mocked up for use in the energy reporting software.
Anumeha Dwivedi, Sales Segmentation for a New Ameritas Universal Life Insurance Product, July 2018, (Dungang Liu, Trinette James)
The key to great sales for a new product is knowing the right kind of customers (who are most profitable) for it and deploying your best agents (high performing sales persons) out to them. Therefore, this project is aimed at performing customer and agent segmentation for a new Ameritas Universal Life Insurance product that is slated for a launch later this year. The segmentation is based on customer, agent, policy and riders data on other such historical products. The segmentation utilizes different demographic, geographic and behavioral attributes that are available directly or could be inferred or sourced externally. Segments developed would not only allow for more effective marketing efforts (better training, better-informed agents and marketing collateral) but also result in better profitability from the sales. Sales segmentation has been attempted using suitable clustering (unsupervised machine learning) techniques and the results suggest that cluster of clients in the early sixties and mid-thirties are most profitable and, in that order, and form the major chunk of the customer base. The age band of 45-55 years has not been as profitable with higher coverage amounts for medium premium payments. On the agents end, the most experienced agents (oldest in age and biggest tenures with Ameritas) have been most successful selling UL policies, followed by the youngest group of agents in their thirties and shortest tenures of 2-5 years while the ones with 6-15 years tenure in the 45-55 years age band are more complacent and limited with the sales of these policies.
Kamaldeep Singh, DOTA Player Performance Prediction, July 2018, (Peng Wang, Yichen Qin)
Dota2 is a free-to-play multiplayer online battle arena (MOBA) video game. Dota 2 is played in matches between two teams of five players, with each team occupying and defending their own separate base on the map. Each of the ten players independently controls a powerful character, known as a "hero" (which they choose at the start of the match), who all have unique abilities and differing styles of play. During a match, players collect experience points and items for their heroes to successful battle with the opposing team's heroes, who attempt to do the same to them. A team wins by being the first to destroy a large structure located in the opposing team's base, called the "Ancient". The objective of this project is to come up with an algorithm that can predict a player’s performance with a specific hero, by learning from his performance with other heroes. The response variable used for quantifying performance is KDA ratio i.e. Kill to deaths ratio of that user with that hero. The techniques used in this project are Random Forest, Gradient Boosting and H2O package that encapsulates various techniques and automates model selection. Data was provided by Analytics Vidhya and is free to be used by anyone.
Sarita Maharia, NetJets Dashboard Management, July 2018, (Michael Fry, Stephanie Globus)
Data visualization plays a vital role in exploring the data and summarizing the analysis results across the organization. The visualizations in Netjets were developed using disparate tools on a need basis without any set of corporate standards. Once the employees began using Tableau as the data visualization tool, it became even more important to have a centralized team to develop the infrastructure, set the corporate standards and enforce required access mechanism. The Center of Excellence for Visual Analytics (CoE-VA) team now serves as the central team to monitor the visualization development across the organization. This team requires a one-stop solution to answer analytics community queries related to dashboard usage and compare access between users. NetJets Dashboard Management project is developed as the solution to enable CoE-VA team to monitor the existing dashboards and access structure. This primary purpose of this project is to present dump of dashboards’ usage and access data in a concise and user-friendly framework. Two exploratory dashboards are developed for this project to accept the user input and provide the required information visually with a provision to download the data. The immediate benefit from this project is the time and effort savings for CoE-VA team. The turnaround time for comparing access between two users is now reduced from approximately an hour to few seconds. The long-term benefit from this project would be to promote the Tableau usage culture in the organization by tracking dashboard usage and educating end-users on the under-utilized dashboards.
Mohammed Ajmal, New QCUH Impact Dashboard &Product Performance Dashboard, July 2018, (Michael Fry, Balji Mohanam)
Qubole charges for its services to its customers based on their cloud usage. Its current revenue methodology is dependent on the instance type that is being used and the Qubole defined factor (QCUH factor) associated with it. The first project evaluates the impact of new QCUH factor from revenue standpoint. Additionally, a dashboard is also built that would enable the sales team to identify customers whose invoices would increase due to new QCUH factor. The dashboard also has functionalities that will aid the sales team to arrive at mutually agreed terms with individual customers with respect to the new QCUH factor. Currently Qubole does not have one single reporting platform where all the important metrics are tracked. The second project attempts to answer this concern. There are two dashboards that are built. The first dashboard tracks all critical metrics at overall or organization level. The second dashboard tracks almost all the metrics that are being tracked in the first dashboard at an individual customer level. The user needs to input the customer name to populate the data for the concerned customer. The two dashboards provide comprehensive overview of the health of Qubole.
Maitrik Sanghavi, Member Churn Prediction & CK Health/Goals Dashboards, July 2018, (Michael Fry, Rucha Fulay)
This document provides information on two key projects executed while interning at Credit Karma. A bootstrapped logistic regression model was created to predict the probability of a Credit Karma member not returning to the platform within 90 days. This model can be used to effectively target the active members who are ‘at-risk’ of churning and also be used as a baseline reference for future model improvisations. CK Health and CK Goals dashboards have been modified and updated to monitor company’s key performance indicators and track 2018 goals. These dashboards have been created using BigQuery and Looker and are automatically updated daily.
Nitish Ghosal, Producer Behavior Analysis, July 2018, (Dungang Liu, Trinette James)
Ameritas Insurance Corporation Limited works on the B2B marketing model partnering with agencies, financial advisors, agents & brokers to sell its products and services to the end-customer. An agent can choose to sell products for multiple insurance companies, but he/she can be contracted full time with only one insurance company. In order to incentivize an agent’s affiliation with Ameritas, it has an Agents Benefits & Rewards Program in place which works on the principle of “greater the agent’s results, greater the rewards”. The aim of my study is to provide a holistic overview of our agents’ behavior and identify their drivers of success through segmentation and agent profiling. In order to achieve this, data visualizations were created in tableau to find trends and clustering was performed in SPSS to segment the agents into groups. The agents could be grouped into five distinct categories - top agents, disability insurance specialists, life insurance specialists, generalists and inactive agents. The analysis revealed that factors such as benefits, club qualification, contract type, club level, agency distribution region, persistency rates, home agency state, AIC (Ametrias Investment Corporation) affiliation are some of the factors which have an impact on an agent’s success and his sales revenues.
Krishna Chaitanya Vamaraju, Recommender System on the Movie Lens Data Set, July 2018, (Dungang Liu, Olivier Parent)
Recommendation systems are used in most e-commerce websites to promote products, up-sell and cross-sell products to new or existing customers based on the history of data present for existing customers. This helps in recommending the right products to customers thereby increasing sales. The current report is a summary of various techniques that are used to for recommendation. A comparison of the models against the time taken to run and the issues concerning each model are discussed in the report. For the current project, data from Kaggle has been utilized for the analysis - The 100k MovieLense ratings data set. The goal of the current project is to use the MovieLens data in R and build recommendation engines based on different techniques using the Recommender Lab package. This could, if deployed into production, serve as a system like that we see on Netflix. For the analysis cosine similarity is used to compute the similarity between users and items. The Recommendation Techniques that have been used are User based Collaborative Filtering, Item based collaborative Filtering and Collaborative techniques based on Popularity and Randomness. Also, a recommender system using Singular value decomposition and K-Nearest Neighbors is also built. A comparison of the techniques indicates that the popular methods technique gives the highest accuracy as well as good run time however this depends on the data set and the stage of recommendation we are in. Finally, the right metric one wants to indicate using a recommender system determines the type of Recommender system one should build.
Ananthu Narayan Ambili Jayanandan Nair, Comparing Deep Neural Network and Gradient Boosted Trees for S&P 500 Prediction, July 2018, (Yan Yu, Olivier Parent)
The objective of this project was to build a model to accurately predict the S&P 500 index in the (t+1)st minute using the component values in the tth minute. Two different machine learning techniques, Artificial Neural Networks, and Gradient Boosted Trees were used to build the models. Tensor flow, which makes use of the NVIDIA GPU was used for training the Neural Network model. H2O, which speeds up the training process by parallelized implementations of algorithms was used for Gradient boosted trees. The models were compared using their Mean Squared Errors and the Neural Network model was found to be better suited for this application.
Prerit Saxena, Forecasting Demand of Drug XYZ using Advanced Statistical Techniques, July 2018, (Michael Fry, Ning Jia)
Client ABC is a large pharmaceutical company and a client of KMK Consulting Inc. ABC has a diverse portfolio of drugs in various disease areas. The organization is structured in the form of division for every disease area. The NET team is responsible for ABC’s drugs in the Neuro-endocrine tumor area, a disease area with a market of about $1.5B globally. ABC’s major drug XYZ is in the market for a few years and has a major market share. The drug is a “Buy and Bill” drug which means hospitals buy the drugs in advance and stock it and then bill the payers according to the usage. The project shared in this report is the forecasting exercise for drug XYZ. In this project, forecasting has been done for 3 phases: remaining 2018, 2019 and 2020-2021. The team uses various forecasting methods such as ARIMA, Holt-Winters and trends in conjunction with business knowledge to prepare forecasts of number of units of drugs, as well as dollar sales for the upcoming years.
Manoj Muthamizh Selvan, Donation Prediction Analysis, July 2018, (Andrew Harrison, Rodney Williams)
UC Foundation Advancement Services team participates in the process to bring donations to UC in an effective manner. The team has data of all the donors collected in the past 12 years and are interested in understanding any findings and insights from the data. The UC Foundation team would like to predict probability of large future donations and target the donors effectively. Hence, the team would want to understand: Trigger and factors responsible for the donations and Probability of donors to donate a larger amount (> $10,000). Random Forest model was used to identify the trigger factors and also predict the high donors on the prospect population. The results are being used by the Salesforce team of UC Foundation to target the high donors with better accuracy than heuristic based models.
Akhilesh Agnihotri, Employee Attrition Analysis, July 2018, (Dungang Liu, Peng Wang)
Human resources plays an important part of developing and making a company or an organization. The HR department is responsible for maintaining and enhancing the organization's human resources by planning, implementing, and evaluating employee relations and human resources policies, programs, and practices. Employers generally consider attrition a loss of valuable employees and talent. However, there is more to attrition than a shrinking workforce. As employees leave an organization, they take with them much-needed skills and qualifications that they developed during their tenure. If the reasons behind employee attrition are identified, the company can create a better working environment for the employees and if employee attrition can be predicted, the company could take necessary actions to stop the valuable employees from leaving. So, this report attempts to explore the HR data, manipulate it to get some meaningful relation between response variable (whether an employee left the company or not) and dependent variables which provide information about an employee. Then, the report also tries to build several statistical models which can predict the probability of an employee leaving the company given his information and conclude on the best model having highest performance.
Amoul Singhi, Identifying Factors that Distinguishes High Growth Customers, July 2018, (Dungang Liu, Lingchan Guo)
If a bank is able to identify customers who have potential to spend more next year than what they have spent this year they can market better products to them and increase customer satisfaction along with their profits. The aim of this analysis is to identify the set of customer features which can distinguish high growth customers from others. The data collected for the analysis was divided into 2 categories transactional and demographical. From Data Exploration some factors which were identified which have a different behavior in both the group. After which, a Linear Regression Model was made with percentage increase from 2016 to 2017 as target variable to identify the factors which are statistically important in determining the growth of cardholder. A logistic regression model was made with classifying accounts with more than 25% growth as high growth customers. This was followed by tree model and Random Forest model to increase the efficiency of the model. It was found that though some of the variables statistically significant but their coefficient is very low implying though they are important in determining the growth of a accounts but their impact is not much. There are 2 transactional variables which were identified from Random Forest which can help to determine if a customer is high growth or not, but accuracy of the model is quite low. Overall there are certain factors which are identified as important but it’s very difficult to predict if a cardholder is going to spend more in upcoming years.
Sudaksh Singh, Path Cost Optimization: Tech Support Process Improvement, July 2018, (Michael Fry, Rahul Sainath)
The objective of this project is to optimize the process of diagnosis and resolution of issues with various products faced by the customers of one of world’s largest technology companies and addressed by tech support agents. The organization’s tech support agents use multiple answer flow trees which is a tree structured question-answer based graph used by agents for diagnosing issues in customer products. The objective of optimizing the answer flow trees is achieved by studying the historical performance of the issue diagnosis and resolution activity carried out by various agents using these trees. Performance of these trees is measured across a collection of metrics defined to capture the speed and accuracy of issue diagnosis and resolution. Based on the analysis, recommendations are made to reorder or prune the answer flow tree to achieve better performance across these metrics. These measures and the following recommendations for editing the answer flow trees will serve as a starting point for more advanced, holistic techniques to design algorithms which generate new answer flow trees having the best performance across all metrics while considering the constraints which limits the reordering and pruning of the answer flow graph.
Max Clark, HEAT Group Customer Lead Scoring, July 2018, (Michael Fry, Maylem Gonzalez)
The HEAT Group is responsible for all events taking place at the American Airlines Arena, such as NBA basketball games, concerts and other performances. While offering a winning and popular product will yield high demand, the HEAT Group must employ analytical methods to smartly target customers who otherwise would not be attending events. The purpose of this project was to determine the differences between the populations of the HEAT Group’s two main customer groups, premium and standard customers. Furthermore, a machine learning model was implemented to, one, create a scoring method that will be used to assess which customers the HEAT Group would have the highest probability to convert from standard to premium customers, and, two, determine which features have the largest impact. It is discovered that the age and financial status are the largest and most important differentiators for the two population groups.
Mohit Deshpande, Wine Review Analysis, July 2018, (Yichen Qin, Peng Wang)
Analyzing structured data is simpler as compared to unstructured data because observations in structured data are arranged in a specific format suitable for implementing analytical techniques on them. On the other hand, internal structure of unstructured data (audio, video, text etc.) do not adhere to any format. Nowadays, unstructured data generation is at an all-time high and thus, comprehending methods to analyze them is the need of the hour. This project aims to study and implement one such technique of Text Analytics which is used to examine textual data. Initial part of the project revolves around performing Exploratory Data Analysis on a dataset containing wine reviews to discover hidden patterns in the data. The latter part focuses on analyzing the text heavy variables by performing basic text, word frequency and sentiment analysis.
Devanshu Awasthi, Analysis of Key Sales-Related Metrics through Dashboards, July 2018, (Michael Fry, Jayvanth Ishwaran)
Visibility is key to running a business at any scale. Organizations have a constant need to assess where they stand day-in and day-out and where they can improve. With the advancements in tools and technologies that help capture large chunks of operational and business data at even shorter intervals, companies have started to explore methods of using this data in a better way to get insights more frequently. One step in this direction at NetJets is to move away from the traditional methods of using static systems for business reporting. Descriptive analytics using advanced techniques of data management and data visualization is used to create dashboards which can be shared across the organization with different stakeholders. Dashboards prove to be extremely useful in analysis as they show the trends for different metrics over the month, and help us dig down deeper through the multiple layers of information. This project involved transforming the daily reporting mechanism for the sales team through dashboards for three large categories – cards business, gross sales and net sales. Each category has important metrics the business users are concerned with. On any day, these dashboards help analyze the time-series data associated with these categories and assess how the business has fared on certain metrics for the month, identify anomalies and get a comprehensive view of the expected sales for the rest of the month.
Ayank Gupta, Predicting Hospital-Acquired Pressure Injuries, July 2018, (Michael Fry, Susan Kayser)
A pressure injury is defined by NPUAP as "localized damage to the skin and/or underlying soft tissue usually over a bony prominence or related to a medical or another device. The injury can present as intact skin or an open ulcer and may be painful. The injury occurs as a result of intense and/or prolonged pressure or pressure in combination with shear. The tolerance of soft tissue for pressure and shear may also be affected by microclimate, nutrition, perfusion, co-morbidities, and condition of the soft tissue. Identification of factors responsible for the pressure injury can be very difficult and is of vital importance for the hospital bed manufacturers. It is crucial to identify the type of pressure injury a patient might acquire in a hospital and educate the nurses to take proactive measures instead of preventive measures. The objective is to predict whether a patient will have a hospital-acquired pressure injury given various demographic information about the patient, information about the wound, and the hospital.
Renganathan Lalgudi Venkatesan, Detection of Data Integrity in Streaming Sensor Data, July 2018, (Michael Fry, Netsanet Michael)
The Advanced Manufacturing Analytics team wants to identify if there are any data integrity issues in the streaming sensor data that is gathered from the manufacturing floors. The infrastructure for asset tracking has already been set up in several phases of time. Each site consists of sensors that capture the spatiotemporal information of all the tagged assets thereby giving real-time information regarding the whereabouts of each of the assets. Depending on their purpose, there are several types of these sensors positioned in different locations within a given plant. This project aims at examining the integrity of the streaming data and to monitor the health of the flow, detect and label the time frames of historical disruptions. Also, since the streaming data is on its early stages of infrastructure, the goal of the analysis is to identify the shortcomings and explore the possible improvements that will be required for future production critical processes. Several methods are proposed to address the current and recent streaming data issues by capturing for disruptions in the data feed using historical data. This would help in capturing disruption on time and thus make real-time site operation decisions. The infrastructure also has times in which there is a data loss as well as high volume of one time data (referred as an outliers in the data). The project proposes methods to detect and quantify the data losses as well as in detecting outliers in the sensor data based on the operating characteristics and other factors at the site.
Aksshit Vijayvergia, Predict Default Capability of a Loan Applicant, July 2018, (Yichen Qin, Ed Winkofsky)
Many people struggle to get loans due to insufficient or non-existent credit histories. And, unfortunately, this population is often taken advantage of by untrustworthy lenders. Borrowing from financial institutions is a difficult affair for this sect of people. Home Credit strives to broaden financial inclusion for the unbanked population by providing a positive and safe borrowing experience. In order to make sure this underserved population has a positive loan experience, Home Credit makes use of a variety of alternative data--including telco and transactional information--to predict their clients' repayment abilities. So, for the capstone project I will be digging deep into the dataset provided by Home Credit on the analytics website called Kaggle. In order to classify whether an applicant will default, I will be analyzing and munging two datasets. The first dataset is extracted from the application filed by a client in Home Loan’s portal. The second dataset contains a client’s historical borrowing information.
Sylvia Lease, Analytics & Communication: Leveraging Data to Make Connections, Summarize Results, & Provide Meaningful Insights, July 2018, (Mike Fry, Steve Rambeck)
Entering into my time as Ever-Green Energy’s Business Analyst Intern, a defined project goal was established to create a variety of reports for client and internal use alike. Armed with newly developed skills in coding, data visualization, and managing data, it was quickly realized that these skills would serve as tools for an overarching, more imperative goal: to communicate effectively. Over several weeks, the opportunity to merge data with communication took a variety of forms. In the beginning, discussions with various leaders and groups within the company translated to an understanding of how analytics could lend itself to furthering the company’s mission. This led to a recognition of how analytics could assist in bridging a gap between the IT and Business Development groups to create reports that helped the teams serve clients by answering key questions and interests. Ultimately, through the creation of polished and carefully designed reports, communication was key in the success of each created report by whether the report provided useful insights and summaries of data in a clear and efficient manner.
Anitha Vallikunnel, Product Reorder Predictions, July 2018, (Dungang Liu, Yichen Qin)
Uncovering the shopping patterns helps the retail chains to design better promotional offers, forecast the demand, optimize the brick and mortar store aisles - in short, everything to build a better experience for the customer. In this project, using the Instacart’s open sourced transactional data, I have identified and predicted the items that are ordered together. Apriori algorithms and association rules are used for market basket analysis to achieve this. Using feature engineering and gradient boosted tree models, reordering of items are also predicted. This will help the retailers in demand forecasting and identifying the items that will be ordered more frequently. F1 score is used as the metric for measuring prediction accuracy for reordering. On training sample, we got F1 score of 0.772 and the F1 score in the out of sample method is 0.752.
Ananya Dutta, Trip Type Classification, July 2018, (Dungang Liu, Peng Wang)
Walmart is the world’s largest retailer and improving customer’s shopping experience is a major goal for them. In this project we are trying to recreate their existing trip type classification with a limited number of features. This categorization of trip types will help Walmart improve the customer’s experience by personalized targeting and can also help them identify business softness related to specific trip types. The data contains over 600k rows consisting of purchase data at a scan level. After rigorous feature engineering and model comparisons we found that the results using an Extreme gradient boosting model is promising with an accuracy of ~90% in training and ~70% in testing data. After looking at importance of variables - total number of units, total number of, count of UPCs, coefficient of variation of percentage contributions across departments and items sold in departments like financial services, produce, menswear and DSD Grocery were found important in building this classifier.
Nitha Benny, Recommendation Engine, July 2018, (Dungang Liu, Yichen Qin)
Recommendation engines are widely used today across e-commerce, video streaming, movie recommendations etc. and this is how each of these businesses maintains their edge in the highly competitive online business world. The idea behind using recommendation engines itself is intriguing and this project aims to compare collaborative filtering techniques to better understand how recommendation engines work. Two main types of collaborative filtering i.e., user based, and item-based methods are used here. The two models are built, and we calculate the MSE and MAE values for each. The models are then evaluated using ROC curve and precision-recall plots for a different number of recommendations. We find that the user based collaborative filtering method using the cosine similarity function works best giving a lower MSE value of 1.064 as well as the better area under the curve and precision-recall curves. Hence, the User-based collaborative filtering method will help businesses recommend better products to their customers and thus improve their customer experience.
Nirupam Sharma, UC Clermont Data Analysis and Visualization, July 18, (Mike Fry, Susan Riley)
For my summer internship, I worked as Graduate Student at UC Clermont College in Batavia, Ohio for the office of Institutional Effectiveness from May 2018 to July 2018. My responsibilities were to build R analytical engine to perform data analysis and to design Tableau dashboards highlighting key university insights. Data used in analysis consisted of tables describing information about number of enrollments, courses, employees, accounts and sections for different semesters. The analytical engine was written in R language to connect to data, combine data tables and perform SQL and descriptive analysis to get inferences in trends across years. The results of analysis were used to build dashboards in Tableau. My responsibilities for Tableau work were to create new calculative fields, parameters and dynamic actions and use other advanced Tableau features learned during my masters at UC to build charts and dashboards to be uploaded on the UC Clermont website. The analytical engine I built allowed college to perform data pipeline tasks effortlessly and quickly without much human input thus saving the college a lot of time and resource efforts. The dashboards built help the college to better understand trends in data and make recommendations to management. My internship allowed me to hone my R and Tableau skills. I learnt to use many advanced R packages and my ability to write quality code increased significantly. My experience at UC Clermont College will allow me to work more professionally and effectively in my future job.
Scott Fueston, Preventing and Predicting Crash-related Injuries, July 2018, (Yan Yu, Craig Zielazny)
This study aims to identify influential factors that elevate a motorist’s risk of sustaining a serious or fatal injury during a motor vehicle crash. Addressing these factors could then potentially save lives, prevent long-term pain and suffering, and avert liabilities and monetary damages. Using population comparisons through exploratory data analysis and model creation for prediction, contributory factors to devastating injuries have been identified. These include: lack of restraint use, deployment of an air bag, crashing into a fixed object, crashing head-on, a roadside collision, time of day is night, the vehicle type is a car, speeding, a rollover occurred, impact of first collision occurred in the front-left corner, disabling damage occurred to the vehicle, and alcohol involved. This information could be invaluable to key members in areas such as policy design, regulatory agencies, car manufacturers, and consumers in: developing clear communications and advocacy for ways to aid in prevention, proposing and implementing effective policy and laws, aiding in the approach taken in manufacturing and designing future automobiles, and elevating the general public’s awareness in terms of risk factors.
Amit Kumar Mishra, Customer Churn Prediction, July 2018, (Yan Yu, Yichen Qin)
Churn Rate is defined as the number of customers who moved out of the subscription of an organization. It is an important component in the profitability of an organization. This gives an indication of the revenue lost by an organization. Additionally, an organization can comprehend the factors which are responsible for customer churn and can allocate its resources to those factors. A customer retention program can be developed so that customer retention is maintained. Thus, given the significance of customer churn, the telecommunication customer data is obtained from the IBM repository and was explored to find the factors that are responsible for customer churn. Various machine learning techniques like logistic regression (with various link functions, namely – probit, logit and cloglog, and using different variable selection procedures), tree, random forest, support vector machine and gradient boosting were used to predict the customer churn and the best model was identified in terms of in-sample and out-of-sample performance. Tenure, contract, internet service, monthly charges and payment method were found to be the most important variables for predicting the customer churn in the telecommunication industry. Among all the different classification techniques, support vector machine with radial basis kernel (RBF) performed the best in terms of accuracy with 80.10% of data classified correctly.
Pranil Deone, Default of Credit Card Clients Dataset, July 2018, (Peng Wang, Liwei Chen)
The Default of credit card client’s data set is used for the purpose of this project. The main objective is to build a credit risk model which accurately identifies the customers who will default their credit card bill payment in the next month. The model is based on the credit history of the customers which includes information regarding their limit balance, previous month’s payment status, previous month’s bill amount. Also, various demographic factors like age, sex, education, marital status has been considered to build the model. The data set contains 30000 observations and 25 variables. Some preprocessing is done on the data to prepare for analysis and modeling. Quantitative and categorical variables are identified and separated for performing appropriate exploratory data analysis. Data modeling techniques like generalized logistic regression, stepwise variable selection, LASSO regression and Gradient Boosting Machine have been used to build different credit risk models. The model performance is evaluated on the training and the testing data. Model performance criteria like misclassification rate and AUC have been used to evaluate different models and select the best model.
Hemang Goswami, Ames Housing Dataset, July 2018, (Dungang Liu, Yichen Qin)
Residential real estate prices are fascinating… and frustrating at the same time. None of the parties involved in the house buying process: the homebuyer, the home-seller, the real estate agent, the banker can point out the factors affecting the house pricing with total conviction. This project explores the AMES Housing Dataset which contains information on the residential property sales that occurred in Ames, Ohio from 2006 to 2010. The dataset has 2930 observations with 80 features describing the state of the property including our variable of interest: Sale Price. After creating 10 statistical models ranging from a basic linear regression model to the highly complex models Gradient Boosting and Neural Network, we were successfully able to predict the house prices with a MSE as low as 0.015. In the process, we found out that the Overall quality of the house, exterior condition, area of the first floor and neighborhood were some of the key features affecting the prices.
Ameya Jamgade, Breast Cancer Wisconsin Prediction, July 2018, (Yan Yu, Yichen Qin)
Breast cancer is a cancer that develops from the breast tissue. Certain changes in the DNA (mutations) result in uncontrolled growth of the cells, eventually leading to cancer. Breast cancer is the one of the most common types of cancer in women in the United States, ranking second among cancer deaths. This project aims at analyzing data of women residing in the state of Wisconsin, USA by applying data mining techniques to classify whether the tumor mass is benign or malignant. Data for this project was obtained from UCI Machine Learning repository containing information of 569 women across 32 different attributes. Data cleaning and exploratory data analysis procedures were performed to prepare and summarize main characteristics of the data-set. The data was portioned into training and test sets, consisting of 80% and 20% split respectively and data mining algorithms such as K-nearest neighbor, random Forest and Support Vector Machine were used for classification of the diagnosis Y-variable as malignant or benign. The optimal value of K is 11 for k-nearest neighbor classifier which gives 98.23% accuracy. The tuned random Forest model has an error rate of 3.87% and identified the top 5 predictor variables. The tuned SVM model gives accuracy of 98.68% and 95.58% on training and test data respectively. The findings indicated in this project can be used by the heath-care community to perform additional research corresponding to these attributes to help prevent the pervasiveness of breast cancer.
Sai Uday Kumar Appalla, Predicting the Health of Babies Using Cardiotocograms, July 2018, (Yan Yu, Yichen Qin)
The aim behind doing this research is to predict the health of a baby based on different diagnostic features observed in the cardiotocograms. The data was collected from the UCI Machine Learning repository. Different Machine Learning algorithms were built to try and understand what are the factors that have a significant influence on the baby’s health and predict the health state of the baby based on these factors with the best possible accuracy. Initially, basic classifiers like K-nearest neighbours and Decision Trees are used to make predictions. These algorithms have higher interpretability and they help us understand the significance of different variables in the analysis. During the later parts of the analysis, complex classifiers like Random Forest, Gradient Boosting and Neural Networks are used to boost the accuracy of the predictions. Finally, after looking at all the different model metrics, Gradient Boosting tree is selected as the best model as it has better model metrics than any of the other models.
Piyush Verma, Building a Music Recommendation System Using Information Retrieval Technique, July 2018, (Peng Wang, Yichen Qin)
Streaming music have become one of the top sources of entertainment for millennials. Because of Globalization, people all around the world are now able to access different kinds of music. The global recorded music industry is worth $15.7 billion and is growing at 6% as per 2016. Digital music is responsible for driving 50% of those sales. There are 112 million paid subscribers for the streaming business and roughly a total of 250 million users, if we include those who don’t pay. Thus, it becomes very important for streaming service providers like YouTube, Spotify and Pandora to continuously improve their service to the users. Recommendation Systems are one such information retrieval technique to predict the ratings or popularity a user would give/have for an item. In this project I would be exploring bunch of methods to predict ratings of users for different artists using GroupLen’s Last.FM dataset.
Poorvi Deshpande, Sales Excellence, July 2018, (Yichen Qin, Ed Winkofsky)
One of the features that a bank offers is to provide loans. The process by which the bank decides whether an applicant should receive a loan is called underwriting. An effective underwriting and loan approval process is a key predecessor to favorable portfolio quality, and a main task of the function is to avoid as many undue risks as possible. The aim of this process, when undertaken with well-defined principals, the lender is able to ensure good credit quality. This is a problem faced by a digital arm of a bank. The primary aim of this division is to increase customer acquisition through digital channels. This division sources leads through various channels like search, display, email campaigns and via affiliate partners. As expected, they see differential conversion depending on the sources and the quality of these leads. Consequently, they now want to identify the leads' segments having a higher conversion ratio (lead to buying a product) so that they can specifically target these potential customers through additional channels and re-marketing. They have provided a partial data set for salaried customers from the last 3 months. They also capture basic details about customers. We need to identify the segment of customers with a high probability of conversion in the next 30 days.
Jatin Saini, An Analysis of Identifying Diseased Trees in Quickbird Imagery, July 2018, (Yan Yu, Edward P Winkofsky)
Machine learning algorithms are used widely to identify patterns in data. One of its applications has been found in identifying diseased trees from Quickbird imagery. In this project, we apply logistics regression, LASSO and Classification Trees (CART) models on imagery data to identify significant variables. We designed this study to create training and testing dataset and compared Area Under Curve (AUC) The results using logistic regression showed us 0.97 AUC value for both training and testing datasets, on the other hand, CART showed AUC 0.92 on testing data and 0.91 on training data. After examining the accuracy of different algorithms, we conclude that logistic regression showed us more accurate results on training and testing data.
Raghu Kannuri, Recommender System Using Collaborative Filtering and Matrix Factorization, July 2018, (Peng Wang, Yichen Qin)
This project aims to develop a recommender system using various machine learning techniques. A recommender system helps in developing a customized list of recommendations for every user and thus, acting as a virtual salesman. It predicts missing user-product rating by drawing information from the user's past product ratings or buying history and ratings by similar users. Content-based Filtering, Knowledge-based, Collaborative Filtering and Hybrid filtering are the widely used recommender system techniques. This project deals with techniques like Item-Based (IBCF) and User-Based (UBCF) collaborative filtering with different similarity metrics and Matrix Factorization with Alternative Least Squares. The results of Matrix Factorization outperformed UBCF and IBCF in all evaluation metrics like precision, recall and AUC.
Madhava Chandra, Analysis on Loan Default Prediction, July 2018, (Yichen Qin, Peng Wang)
The purpose of this study was to determine what constitutes risky lending. Each line item in the data corresponded to a loan, and had various features relating to loan amount, employment information of the borrower, payments made, and the classification of the loan as charged off or active with any delays in payments noted. An exploratory data analysis was performed on the data, to look for outliers and individual distributions of the variables. Following which, the interactions between these variables were studied to weed out highly correlated variables. Owing to low representation of defaults in the sample, this was treated as an imbalanced class problem, wherein traditional random sampling would not yield optimal results. To overcome this problem, stratified sampling, random under and over sampling, SMOTE and ADASYN methodologies were explored.
All the above sampling methodologies were trained and tested on logistic regression to pick which sampling procedure to follow for this exercise. Following which, it was found that SMOTE gave the best results. To best classify which loans would likely default from the given dataset, various statistical learning techniques, such as Regression, Tree-based methods- standalone, boosting and bagging ensemble methods, Support Vector Machines and Neural Networks were employed. Amongst these classifiers, Gradient boosting was observed to have the best performance, although with further fine tuning, Deep Neural Networks could possibly classify better.
Samrudh Keshava Kumar, Analytical Analysis of Marketing Campaign Using Data Mining Techniques, July 2018, (Dungang Liu, Peng Wang)
Marketing products is an expensive investment for a company, and spending money to market to customers who might not be interested in the product is inefficient. This project aims to determine and understand the various factors which influence a customer’s response to a marketing campaign. This will help the company design targeted marketing campaigns to cross-sell products. Predictive models were built to predict the response of each customer to the campaign based on various characteristics of the customer using models such as logistic regression, Random Forests and Gradient Boosted trees. The factors affecting the response was determined to be Employment status, Income, type of renew offer, months since policy inception and last claim. The models were validated using a test set and the best accuracy was achieved by the Random Forests model. It has an AUC of 0.995 and misclassification rate of 1.3%.
Rohit Bhaya, Lending Club Data – Assessing Factors to Determine Loan Defaults, July 2018, (Yan Yu, Peng Wang)
Lending club is an online peer-to-peer platform that connects the loan customers with potential investors. Loan applicants can borrow money in the range of $1,000 to $40,000, and the investors can choose the loan products they want to invest in and make profit. The loan data was available on Kaggle and contains applicant information about loans that were originated between 2007 and 2015. Using the available information for applicants who have already paid-off the loan, various machine learning algorithms are built to estimate the propensity of a customer’s default. Further, it was observed that the step AIC approach for logistic regression had the best performance amongst all the models tested. This final model was then used to build an applicant default scorecard that has a range between 300 and 900. A higher score indicates a higher propensity for an applicant to default. Further, the scorecard gave good performance in both the training data and the test data. This scorecard was then used on the active customer base to score an applicant’s propensity to default. From the distribution of this score, it was observed that the most of the active loan customers fall into low-risk category. Further, for higher score applicants, the management can prepare preventive strategies to avoid future losses.
Nitin Sharma, A Study of Factors Influencing Smoking Behavior, July 2018. (Dungang Liu, Liwei Chen)
In this study, statistical analysis is performed to understand the factors that influence smoking habits. Data used in this experiment is obtained from a survey conducted in Slovakia on participants aged 15-30 years. This dataset is available for the public at the Kaggle website. Data collected in this survey includes information about “Smoking habits” of the participants. This is the variable of interest which is a categorical variable with values: Never smoked, Tried smoking, Former smoker and Current smoker. The goal of this study is to find out which factors influence the smoking habit. Machine learning techniques (logistic regression, ensemble methods) are used to predict whether an individual is a current/past smoker or is someone who has never smoked. The best model selected in this study provides an overall accuracy of 83% in the test sample. The result of this study is applicable only to 15-30 years old Slovakia population and cannot be associated with a different population.
Yiyin Li, Foreclosure in Cincinnati Neighborhoods, July 2018, (Yan Yu, Charles Sox)
The main purpose of this paper is to analyze what factors would likely affect foreclosure in Cincinnati neighborhoods and build a model to predict whether the property will be foreclosed by banks. The dataset that is analyzed lists all real estate transactions in Cincinnati from 1998 to 2009. In this paper, after a brief description of the project background and data, exploratory data analysis will be provided, which mainly includes a basic analysis of each individual variable, the correlation statistics between variables and the basic information of 47 Cincinnati neighborhoods. Then, 10 different types of models and a model comparison are provided in the modeling section in order to find the best model to predict the foreclosure. In conclusion, properties’ sales price, building and land value, selling year and that year’s properties mortgage rate, and the median family income are the most influential variables, and the gradient boosting model is the best model for predicting foreclosure.
Adrián Vallés Iñarrea, Predicting Customer Satisfaction and Dealing with Imbalanced Data, July 2018, (Dungang Liu, Shaobo Li)
From frontline support teams to C-suites, customer satisfaction is a key measure of success. Unhappy customers don't stick around. In this paper, we will compare logistic regression, classification tree, random forest and extreme gradient boosting models to predict whether a customer is satisfied or dissatisfied with their banking experience. Doing so would allow banks to take proactive steps to improve a customer's happiness before it's too late. The dataset was published in Kaggle by Santander Bank, a Spanish banking group with operations across Europe, South America, North America and Asia. It is composed of 76020 observations and 371 variables that have been semi-anonymized to protect the client’s information. 96.05% of the customers are satisfied and only 3.95% are dissatisfied, making this classification problem to be highly imbalanced. Since most of the commonly used classification algorithms do not work well for imbalanced problems, we also compare in this paper two ways to deal with the imbalanced data classification issue. One is based on cost sensitive learning, and the other is based on a sampling technique. Both methods are shown to improve the prediction accuracy of the minority class, and have favorable performance compared to the existing algorithms.
Guansheng Liu, Development of Statistical Models for Pneumocystis Infection, July 2018, (Peng Wang, Liwei Chen)
The yeast-like fungi Pneumocystis reside in lung alveoli and can cause a lethal infection known as Pneumocystis pneumonia (PCP) in hosts with impaired immune systems. Current therapies for PCP suffer from significant treatment failures and a multitude of serious side effects. Novel therapeutic approaches, such as newly developed drugs are needed to treat this potentially lethal opportunistic infection. In this study, I built a simplified two-stage model for Pneumocystis growth and determined how different parameters control the levels of Trophic and Cyst forms of the organism by employing machine learning methods including multivariate linear regression model, partial least squares, regression tree, random forest and gradient boosting machine. It was discovered that parameters of K_sTro (replication rate of Trophic form), K_dTro (degradation rate of Trophic form) and K_TC (transformation rate from Trophic form to Cyst form) play predominant roles in controlling the growth of Pneumocystis. This study is of great clinical significance, as the extracted statistical trends on the dynamic changes of the Pneumocystis will guide the design of novel and effective treatments for controlling the growth of Pneumocystis and PCP therapy.
Vignesh Arasu, Major League Baseball Analytics: What Contributes Most to Winning, July 2018, (Yan Yu, Matthew Risley)
Big data and analytics has been a growing force in Major League Baseball. The principle of moneyball vitalizes the importance of two of these statistics, on-base percentage and slugging (Total Bases/Number of At Bats) as the core principles for building winning franchises. The analysis of this report of data from all teams from 1962-2012 incorporating methods of multiple linear regression, logistic regression, regression and classification trees, generalized additive models, linear discriminant analysis, and k-means clustering creating the best models for the number of wins by a team(linear regression response variable) and whether or not a team makes the postseason(logistic regression response variable) shows that runs scored, runs given up, on-base percentage, and slugging do have strong effects on team success of wins and making the playoffs. The in-sample best models of supervised logistic regression techniques all show great results with AUC values all over 0.90 while the unsupervised k-means clustering technique showed that the data can be effectively grouped in 3 clusters. A mix of supervised and unsupervised study techniques show that a variety of statistical techniques can be used to analyze baseball data.
Preethi Jayaram Jayaraman, Prediction of Kickstarter Project Success, July 2018, (Yichen Qin, Bradley Boehmke)
Kickstarter is an American public-benefit corporation that uses crowdsourcing to bring creative projects to life. As a crowdfunding platform, Kickstarter promotes projects across multiple categories such as film, music, comics, journalism, games and technology, among others. In this project, the Kickstarter Projects Database was analyzed and explored in detail. The patterns identified in the Data exploration stage were used as inputs in for predictive modeling. Classification models such as Logistic Regression and Classification Trees were built to classify the Kickstarter projects. Performance across the two models was compared on the validation set (hold-out set – 20% of the data) using accuracy, sensitivity and AUC as the performance criteria. ROC curves were also plotted for both the models. The Logistic Regression model was chosen as the best model for the Kickstarter project classification with an accuracy of 0.9996 and AUC of 0.9999. The performance of the Logistic Regression model (best performing model) was evaluated on the test data to conclude the classification problem. The Logistic Regression model classified the Kickstarter projects with an accuracy of 99.96% on the test data. The analysis of the Kickstarter Projects was further extended to include projects of states - ‘Suspended’, ‘Live’, ‘Undefined’ and ‘Canceled’, recoded as ‘Failed’. Building Logistic Regression and Classification Tree models resulted in Logistic Regression as the best model with a classification accuracy of 0.9656 on the test data.
Rohit Pradeep Jain, Image Classification: Identifying the object in a picture, July 2018, (Yichen Qin, Liwei Chen)
The objective of this project was to classify images of fashion objects (like T-shirts, sneakers, etc.) based on the pixel information contained in these pictures. The image was classified into one of the 10 available classes of fashion objects using different modeling techniques and a final model was chosen based on the accuracy on the cross-validation dataset. The final model was then tested on the untouched testing dataset to validate the out of bag accuracy. The project serves as a benchmark for more advanced studies in the image classification field and helps in technologies like stock photography.
Priyanka Singh, Mobile Price Prediction, July 2018, (Peng Wang, Liwei Chen)
The aim of this study is to classify the prices of mobile devices from 0 to 3 with the higher number denoting higher prices. The dataset has a total of 2000 observations and 21 variables. The response variable, the price range is to be predicted with the highest accuracy possible. The analysis starts with performing the exploratory data analysis followed by the construction of machine learning models. The exploratory data analysis revealed that the categorical variables weren’t significant enough in determining the price of the devices. The numeric variables, battery power and ram of the phones, had a considerable impact on the prices. Classification tree, random forest, support vector machines and gradient boosting machines were used to predict the price of the phones. Support vector machine model was chosen as our final model as it gave the lowest misclassification rate of 0.08 and highest area under curve (AUC) value of 0.97. The features used in generating the model were: ram, battery power, pixel width, pixel height, the weight of the mobile, internal memory, mobile depth, clock speed and touchscreen.
Gautami Hegde, HR Analytics: Predicting Employee Attrition, July 2018, (Yan Yu, Yichen Qin)
Employee attrition is a major problem to an organization. One of the goals of the HR Analytics department is to identify the employees that are likely to leave the organization in the future and take actions to retain them before they leave. Thus, the aim of this project is to understand the key factors that influence this attrition and predict the attrition of an employee based on these factors. The dataset used here is the HR analytics dataset by IBM Watson Analytics which is a sample dataset created by IBM data scientists. In this project, the exploratory data analysis includes feature selection based on distributions, correlation and data visualizations. After eliminating some features, logistic regression, generalized additive model, decision tree and random forest techniques are used for building models. In order to evaluate the model performance, the prediction accuracy and AUC are considered. Of the different classification techniques, logistic regression model and generalized additive model were found to be the best in predicting the employee attrition.
Venkata Sai Lakshmi Srikanth Popuri, Prediction of Client Subscription from Bank Marketing Data, July 2018, (Peng Wang, Yichen Qin)
Classification is one of the most important and interesting problems in today’s world. It has applications ranging from email spam tagging to fraud detection to predictions in the healthcare industry. The area of interest here is Bank Marketing of a Portuguese banking institution. The marketing teams at banks run campaigns to pursue clients to subscribe for a term deposit. The purpose of this paper is to apply various data and statistical techniques to analyze and model the bank marketing data and predict whether a client will subscribe for a term deposit. The analysis aims at addressing this classification problem by performing Explanatory Data Analysis (EDA), building models like Logistic Regression, Step AIC & Step BIC models, Classification Tree, Linear Discriminant Analysis (LDA), Support Vector Machines(SVM), Random Forest(RF), Gradient Boosting(GB) and validating these models using the misclassification rate and area under the ROC curve. The performance of SVM is better than other models for this dataset with a low out-of-sample Misclassification Rate and good AUC values.
Ali Aziz, Financial Coding for School Budgets, July 2018, (Yan Yu, Peng Wang)
School budget items must be labelled according to their description in a difficult task known as financial coding. A predictive model that outputs the probability of each label can help in accomplishing this work. In this project the effectiveness of several data processing techniques and machine learning algorithms was studied. After applying data imputation and natural language processing techniques, a one-vs-rest classifier consisting of L1 regularized logistic regression models performed the best out of all classifiers investigated. This classifier achieved an out-of-sample Log Loss of 0.5739, an improvement of approximately 17% on the baseline predictive model.
Shashank Badre, A Study on Online Retail Data Set to Understand the Characteristics of Customer Segments that Are Associated with the Business, July 2018, (Peng Wang, Yichen Qin)
Online retailers in the world who happen to have a small business and are new entrants in the market are keen on using data mining and business intelligence techniques to better understand existing and potential customer base. However, such small businesses often lack expertise and technical know-how to perform requisite analysis. This study will help such online retailers to understand the approach and different ways the data can be utilized to gain insights into its customer base. This study is done on an online retail data set to understand characteristics of different segments of customers. Based on these characteristics the study will explain which customers segments contribute high monetary value and which customer segments contribute low monetary value to the business.
Ravish Kalra, Phishing Attack Prediction Engine, July 2018, (Dungang Liu, Edward Winkofsky)
A phishing attack forces the users to enter their credentials in a fake website or by making them open a malware in their system. This, in turn, results in identity theft or financial losses. The aim of this project is to build a prediction engine through which a browser plugin can accurately predict whether a given website is legitimate or fraudulent after capturing certain features from the page. The scope of the project is only limited to websites and does not involve any kind of other electronic media. The data set used for the analysis has been obtained from UCI Machine Learning repository. After evaluating a website through 30 documented features, the model predicts a binary response of 0 (legitimate) or 1 (phishing). Methods of analysis include (but not limited to) visualization of spread of different features, identifying correlation between covariates and the dependent variable and implementing different classification algorithms such as Logistic Regression, Decision Tree, SVM and Random Forest. Due to the unavailability of asymmetric weights for false positives and false negatives, various other evaluation metrics such as F Score, Log Loss etc. along with out-sample AUC are compared. The Random Forest model outperforms other modelling strategies considerably. Although a blackbox classifier, Random Forest model works well for the purpose of a back-end prediction engine that insulates decision making from the users.
Akul Mahajan, TMDB - "May the Force be with you", July 2018, (Yan Yu, Yichen Qin)
Today, we live in an era where almost every important business decision is guided through the application of statistics, one of the most popular areas in this regard is the application of statistical models in machine learning and prediction modelling in order to garner outcomes and align them with the goals of the industry and formulate and improve strategy to meet these goals. TMDB is one of the most popular datasets on Kaggle which houses the data of 5000 movies from different genres, geographies and languages. The use of predictive modelling can be applied to gain insights about the expected performance of the movie before they are released and formulate proper marketing strategies and campaigns in order to further improve their performance. This paper employs the use of some of the advanced predictive algorithms like linear regression, CART, Random Forests, Generalized additive model and Gradient Boosting along with tuning these model to achieve optimum performance and evaluating their potential using proper evaluation metrics.
Kevin McManus, Analysis of High School Alumni Giving, July 2018, (Yan Yu, Bradley Boehmke)
Archbishop Moeller High School has an ambitious plan to increase its participation rate (giving + activities), up from 4% a few years ago to 13% last year with a goal of 15%. Donations to the 2017 Unrestricted Fund were made by 9% of the 11,524 alumni base and reflected an increase of 258% vs 2013. The analyses focused on a regression predictive model for donation amount and a classification model to predict which alumni will donate. Both suggest that prior alumni giving, and connections to the school via other affiliations were strong predictors, among several others. The school should focus on creating opportunities for involvement by alumni as well as maintain strong connections to its base who give consistently. Overall, higher wealth levels were not a significant predictor for giving to the Unrestricted Fund. The analyses also performed unsupervised clustering which suggested there were distinct groups of those strongly connected with the school through other affiliations and those who were not. The former group tended to live within 100 miles of Cincinnati and give at a higher rate than the other groups. Even the clustering of giving alumni showed a small consistent group of givers and a second group of occasional donors. The former group also had a higher rate of other connections to the school compared to those who gave only occasionally.
Ritisha Andhrutkar, Sentiment Analysis of Amazon Unlocked Phone Reviews, July 2018, (Yichen Qin, Peng Wang)
Online customer reviews hold a powerful effect on the behavior of consumers and, therefore, the performance of a brand in the Age of Internet today. According to a survey, 88% of consumers trust online reviews as much as personal recommendations for purchasing any item on an e- commerce website. Positive reviews boost the confidence of an organization while Negative reviews suggest areas of improvement. It is also certain that having more reviews for a product will result in a high conversion rate for that product. This report is aimed at analyzing and understanding the trend of human behavior towards unlocked mobile phones sold on Amazon. The dataset utilized has been scraped from the e-commerce website and consists of several listings of phones along with their features such as Brand Name, Price, Rating, Reviews and Review Votes. Text Mining techniques have been leveraged on the dataset to identify the sentiment of each customer review which would help Amazon and, in turn, the manufacturer to improve their current products and sustain their brand name.
Swapnil Patil, Applications of Unsupervised Machine Learning Algorithms on Retail Data, July 2018, (Peng Wang, Yichen Qin)
Data Science and Analytics is widely used in the retail industry. With the advent of bid data tools and higher computing power, sophisticated algorithms can crunch huge volumes of transactional data to extract meaningful insights. Companies such as Kroger invest heavily to transform more than a hundred-year-old retail industry through analytics. This project is an attempt to apply unsupervised learning algorithms on the transactional data to formulate strategies to improve the sales of the products. This project deals with online retail store data taken from UCI Machine Learning Repository. The data pertains to a UK-based registered online retail store’s transaction between 01/12/2010 and 09/12/2011. The retail store mostly sells different gift items to wholesalers around the globe. The objective of the project is to apply statistical techniques such as clustering, association rules and collaborative filtering to come up with different business strategies that may lead to an increase in the sales of the products.
Tathagat Kumar, Market Basket Analysis and Association Rules for Instacart Orders, June 2018, (Yichen Qin, Yan Yu)
For any retailer it is extremely important to identify customer habits, why they make certain purchases, gain insight about their merchandise, movement of goods, peak time of sales and set of products which are purchased together. It helps them in structuring store lay out, designing various promotion and coupons and combining all with a customer loyalty card which makes all the above strategy even more useful. The first public anonymized dataset from Instacart is selected for this paper and the goal is to analyze this data set for finding out fast moving items, frequent basket size, peak order times, frequently reordered items and high moving products in aisles. This paper also demonstrates the loyal customer habit pattern and prediction of their future purchase with reasonable accuracy. Market basket analysis with association rules are used to discover the top strong rules of product association based on different association measures e.g. support, confidence and lift. Analysis has been conducted to uncover the strong rules for high frequent and less frequent items. Also, it is shown in the example of top selling products demonstrating which product will follow before and after its purchase using left hand and right-hand association rules.
Sayali Dasharath Wavhal, Employee Attrition Prediction on Class-Imbalanced Data using Cost-Sensitive Classification, April 2018, (Yichen Qin, Dungang Liu)
Human Resource is the most valuable asset for an organization and every organization aims at retaining its valuable workforce. Main goal of every HR Analytics department is to identify the employees that are likely to leave the organization in the future and take actions to retain them before they leave. This paper aims at identifying the factors resulting in employee attrition and build a classifier to predict employee attrition. The analysis aims at addressing the class-imbalance classification problem by exploring the performance of various Machine Learning models like Logistic Regression, Classification Tree using Recursive Partitioning, Generalized Additive Modeling and Gradient Boosting Machine. This being a highly-imbalanced class problem, with only 15% Positives, “Accuracy” is not a suitable indicator of model performance. Thus, to avoid the bias of the classifier towards the majority class, Cost-Sensitive classification was adopted to tackle misclassification of minority class, where False Negatives have a higher penalty as compared to False Positives. The model performance was evaluated based on Sensitivity (Recall), Specificity, Precision, Misclassification Cost and Area under the ROC Curve. The analysis in this paper suggests that although the recursive partitioning and ensemble techniques of decision trees have a good predictive power of the minority class, but more stable prediction performance is observed with the Logistic Regression Model and Generalized Additive Model.
Yong Han, Whose Votes Changed the Presidential Elections?, April 2018, (Dungang Liu, Liwei Chen)
The unique aspect of the YouGov / CCAP data was that it contained the information of 2008 to 2016 elections from the same group of 8000 voters. This might provide information on voting patterns between elections.
The goals of this study were to find: Was any predictor significant to the 2012 and 2016 presidential vote? Was it consistent between elections? Was any predictor significant to the change-vote between two elections? Was it consistent? Based on exploratory data analysis, 70% of voters never changed their votes, and 20% of voters changed at least once in last three elections. Was any predictor significantly associated with this behavior?
Using VGLM method, this study found that: In single elections, some common predictors were significant in elections, such as Gender, Child, Education, Age, Race and Marital status. Meantime, different elections had different significant predictors. In vote-change between two elections, significant predictors were different between two different elections. Between 2012-2016 elections, model suggested that Education, Income and Race were significant to vote-change. While between 2008-2012, model suggested that Child and Employment status were significant to vote-change. With 2016 elections data, the never-change-vote model found that Income, Age, Ideology, News and Married status were significant to this never-change-vote behavior. Individual election models could predict ~60% of votes in testing samples. Utilizing a previous vote as a predictor, models could predict ~ 89% of votes in testing samples. The never-change-vote model predicted well on the 70% never-change-vote voters, but missed almost all on the 20% change-vote voters.
Yanhui Chen, Binning on Continuous Variables and Comparison of Different Credit Scoring Techniques, April 2018, (Peng Wang, Yichen Qin)
Binning is a widely-used method to group a continuous variable into a categorical variable. In this project, I binned the continuous variables amount, duration and age in German credit data, and performed a comparative analysis on the logistic model using binned variables, to logistic model without using binned variables, to logistic additive model without using binned variables, to random forest, and to gradient boosting. I found that the performance of logistic with binning model is the weakest one among fitted five models. I also shown that the variable importance varied with different models, and the variable checkingstatus is selected as one of the important variables in most of the built models. Binned variables duration and amount were determined to be important variables in logistic with binning model. Random forest is the only model which selected variable history as an important variable.
Jamie H. Wilson, Fine Tuning Neural Networks in R, April 2018, (Yan Yu, Edward Winkofsky)
As artificial neural networks grow in popularity, it is important to understand how they work and the layers of options that go into building a neural network. The fundamental components of a neural network are the activation function, the error measurement and the method of backpropagation. These methods make neural networks good at finding complex nonlinear relationships amongst predictor and response variables as well as interactions between predictor variables. However, neural networks are difficult to explain, can be computationally expensive and tend to overfit the data. There are two primary R packages for neural networks: nnet and neuralnet. The nnet package has fewer tuning options but can handle unstandardized and standardized data. The neuralnet package has a myriad of options, but only handles standardized data. When building a predictive model using the Boston Housing Data, both packages are capable of producing effective models. Tuning the models is important to get valid and robust results. Given the amount of tuning parameters in neuralnet, these models perform better than the models built in nnet.
Kenton Asbrock, The Price to Process: A Study of Recent Trends in Consumer-Based Processing Power and Pricing, April 2018, (Uday Rao, Jordan Crabbe)
This analysis investigates the effects of the deceleration of the observational Moore’s Law on consumer based central processing units. Moore’s Law states that the number of transistors in a densely integrated circuit approximately doubles every two years. The study involved a data-set containing information about 2241 processors released by Intel between 2001 and 2017, which is the approximate time frame associated with the decline of Moore’s Law. Data wrangling and pre-processing was performed in R to clean the data and convert it to a state that was ready for analysis. Data was then aggregated by platform to study the evolution of processing across desktops, servers, embedded devices, and mobile devices. Formal time series procedures were then applied to the entire data set to study how processing speed and price has changed recently and how future forecasts are expected to behave. It was determined that while processing speeds are in a period of stagnation, the price paid for computational power has been decreasing and is expected to decrease in the future. While the negative effects of the decline of Moore’s Law may have an impact on a small fraction of the market through speed stagnation, the overall price decrease of processing performance will benefit the average consumer.
Hongyan Ma, A Return Analysis for S&P 500, April 2018, (Yan Yu, Liwei Chen)
Time series analysis is commonly used to analyze and forecast economic data. It helps to identify patterns, to understand and model the data as well as to predict short-term trends. The primary purpose of this paper is to study the Moving Window analysis and GARCH Models built through analyzing the monthly return of S&P 500 for recent 50 years from January 1968 to December 2017.
In this paper, we first studied the raw data to check its patterns and distributions, and then analyzed the monthly returns in different time windows, that is, 10-year, 20-year, 30-year and 40-year by Moving Window analysis. We found that over the long horizon, the S&P 500 had produced significant returns for investors who had long stayed in investment. However, for a given 10-year period, the return can go even negatively. Finally, we fitted several forms of GARCH models in normal distributions as well as in student t distributions and found the GARCH (1,1) Student-t model as the best model in terms of the Akaike’s Information Criteria and log-likelihood values.
Justin Jodrey, Predictive Models for United States County Poverty Rates and Presidential Candidate Winners, April 2018, (Yan Yu, Bradley Boehmke)
The U.S. Census Bureau administers the American Community Survey (ACS), an annual survey that collects data on various demographic factors. Using a Kaggle dataset that aggregates data at the United States county level and joining other ACS tables to it from the U.S. FactFinder website, this paper analyzes two types of predictive models: regression models to predict a county’s poverty rate and classification models to predict a county’s 2016 general election presidential candidate winner. In both the regression and classification settings, a generalized additive model best predicted county poverty rates and county presidential winners.
Trent Thompson, Cincinnati Reds – Concessions and Merchandise Analysis, April 2018, (Yan Yu, Chris Calo)
Concession and Merchandise sales account for a substantial percentage of revenue for the Cincinnati Reds. Thoroughly analyzing the data captured from Concession and Merchandise sales can help the Reds with pricing, inventory management, planning and product bundling. The scope of this Concession and Merchandise analysis includes general exploratory data analysis, identifying key trends in sales, and analyzing common order patterns. One major finding from this analysis was calculating 95% confidence intervals of Concession and Merchandise sales resulting in improved efficiency in inventory management. Another learning is that generally, fans buy their main food items (hot dog, burger, pizza) before the game and then beverages, desserts and snacks during the game. Finally, strong order associations exist among koozies with light beer and bratwursts with beverages and peanuts. I recommend displaying the koozies over the refrigerator with light beers and bundling bratwursts in a similar manner to the current hot dog bundle with hopes of driving a lift in sales.
Xi Chen, Decomposing Residential Monthly Electric Utility into Cooling Energy Use by Different Machine Learning Techniques, April 2018, (Peng Wang, Yan Yu)
Today the residential sector consumes about 38% of energy produced, of which nearly a half is consumed by HVAC systems. One of the main energy-related problems is that most households do not operate in an energy efficient manner, such as utilizing natural ventilation or adjusting the thermostat upon weather conditions, thus leading to higher usage than necessary. It has been reported that energy saving behaviors may lead to 25% energy-use reduction just by giving consumers a more detailed electricity bill with the same building settings. Therefore, the scope of this project is to construct a monthly HVAC energy use predictive model with simple and accessible predictors for home. The dataset used in this project include weather, metadata, electricity-usage-hours data downloaded from pecan street data port. The final dataset used in this project contains 3698 observations and 11 variables. Multiple linear regression, regression tree, random forest, and gradient boosting are four types of machine learning techniques that are applied to predict the monthly HVAC cooling uses. Root Mean Squared Error (RMSE) and adjusted R2 are two criteria that are adopted to evaluate the model fitness. All models are highly predictive based on the range of R2 from 0.823 to 0.885. Gradient boosting model has the best overall quality of the prediction with out-of-sample RMSE as 0.57.
Fan Yang, Breast Cancer Diagnose Analysis, April 2018, (Yichen Qin, Dungang Liu)
The dataset studied in this paper explains breast cancer tissue from two dimensions. The tissue is either benign or malignant. Our target is to recognize malignant tissue by knowing the dimension (mean, standard error and the worst) of it. This paper shows a section of feature selection which is based on correlation analysis and data visualization. After eliminating some correlated and visually unclassified features, logistic regression, random forest and xgboosting are conducted on training and validation data. 10 fold cross validation is also used for estimating performance of all the models, then prediction accuracy from different models are compared and area under ROC is used to evaluate model performance on validation data.
Sinduja Parthasarathy, Income Level Prediction using Machine Learning Techniques, April 2018, (Yichen Qin, Dungang Liu)
Income is an essential component in determining the economic status and standard of living of an individual. An individual’s income largely influences his nation’s GDP and financial growth. Knowing one’s income can also assist an individual in financial budgeting and tax return calculations. Hence, given the importance of knowing an individual’s income, the US Census data from the UCI Machine Learning Repository was explored in detail to identify the factors that contribute to a person’s income level. Furthermore, machine learning techniques such as Logistic regression, Classification tree, Random forests, and Support Vector Machine were used to predict the income level and subsequently identify the model that most accurately predicted the income level of an individual.
Relationship status, Capital gain and loss, Hours worked per week and Race of an individual were found to be the most important factors in predicting the income level of an individual. Of the different classification techniques that were built and tested for performance, the logistic regression model was found to be the best performing, with the highest accuracy of 84.63% in predicting the income level of an individual.
Jessica Blanchard, Predictive Analysis of Residential Building Heating and Cooling Loads for Energy Efficiency, March 2018, (Peng Wang, Dungang Liu)
This study’s focus is to predict the required heating load and cooling load of a residential building through multiple regression techniques. Prediction accuracy is tested with in-sample, out-of-sample, and cross-validation procedures. A dataset of 768 observations, eight potential predictor variables, and two dependent variables (heating and cooling load) will be explored to help architects and contractors utilize and predict the necessary air supply demand and thus design more energy efficient homes. Exploratory Data Analysis not only uncovered relationships between the explanatory and dependent variables, but relationships amongst explanatory variables as well. To create a model with accurate predictability, the following regression techniques were examined and compared to one another: Multiple Linear Regression, Stepwise, LASSO, Ridge, Elastic-Net, and Gradient Boosting. While each method has its advantages and disadvantages, the models created using LASSO Regression to predict heating and cooling load, balance simplicity and accuracy relatively well. However, when compared against the results from Gradient Boosting, the LASSO models produced greater root mean squared error. Overall, the regression trees created with Gradient Boosting yielded the best predictive results with parameter tuning to regulate “overfitting.” These models meet the purpose of this study to provide residential architects and contractors a straightforward model with greater accuracy than the current “Rules of Thumb” practice.
Zachary P. Malosh, The Impact of Scheduling on NBA Team Performance, November 2017, (Michael Magazine, Tom Zentmeyer)
Every year, the NBA releases their league schedule for the coming year. The construction of the schedule contains many potential schedule-based factors (such as rest, travel, and home court) that can impact each game. Understanding the impact of these factors is possible by creating a regression model that quantifies the team performance in a particular game in terms of final score and fouls committed. Ultimately, rest, distance, attendance, and time in the season had direct impact on the final score of the game while the attendance at a game led to an advantage in fouls called against the home team. The quantification of the impact of these factors can be used to anticipate variations in performance to improve accuracy in a Monte Carlo simulation.
Oscar Rocabado, Multiclass Classification of the Otto Group Products, November 2017, (Yichen Qin, Amitabh Raturi)
Otto group is a multinational group with thousands of products that need to be classified consistently in nine groups. The better the classification, the more insights they can generate about their product range. However, the data is highly unbalanced among classes so we try to find out if the balancing group Synthetic Minority Oversampling Technique has notable effects in the performance of the accuracy and Area under the Curve of the classifiers. Given the data set is obfuscated so that the interpretability of the dataset is impossible, we will use black box methods like Linear and Gaussian Support Vectors Machines and Multilayer Perceptron and Ensembles that combines classifiers like Random Forests and Majority Voting.
Shixie Li, Credit Card Fraud Detection Analysis: Over sampling and under sampling of imbalanced data, November 2017, (Yichen Qin, Dungang Liu)
Imbalanced credit fraud data is analyzed by over sampling and under sampling methods. A model is built with logistic regression and area under PRROC (Precision-Recall curve) is used to show model performance of each method. The disadvantage of using area under ROC is that due to the imbalance of the data the specificity will be always close to 1. Therefore the area under the curve does not work well on imbalanced data. This disadvantage is shown by comparison in this paper. Instead a precision-recall plot is used to find a reasonable region for the cutoff point based on the result from selected model. The cutoff value should be chosen within the region or around the region and it is all depends on whether precision or recall is more important to the bank.
Cassie Kramer, Leveraging Student Information System Data for Analytics, November 2017, (Michael Fry, Nicholas Frame)
In 2015, The University of Cincinnati began to transition its Student Information System from a homegrown system to a system created by Oracle PeopleSoft called Campus Solutions and branded by UC as Catalyst. In order to perform reporting and analytics on this data, the data must be extracted from the source system, modeled and loaded into a data warehouse. The data can then be exported to perform analytics. In this project, the process of extract, modeling, loading and analyzing will be covered. The goal will be to predict students’ GPA and retention for a particular college.
Parwinderjit Singh, Alternative Methodologies for Forecasting Commercial Automobile Liability Frequency, October 2017, (Yan Yu, Caolan Kovach-Orr)
Insurance Services Office, Inc. publishes quarterly forecast of Commercial Automobile liability frequency (number of commercial automobile insurance claims reported/paid) to help insurers make better pricing and reserving decisions. This paper proposes forecasting models based on time-series forecasting techniques as an alternative to already existing traditional methods and intends to improve the existing forecasting capabilities. ARIMAX forecasting models have been developed with economic indicators as external regressors. These models resulted in a MAPE (Mean Absolute Percentage Error) ranging from 0.5% to ~9% which is a significant improvement from currently used techniques.
Anjali Chappidi, Un-Crewed Aircraft Analysis & Maintenance Report Analysis, August 2017, (Michael Fry, Jayvanth Ishwaran)
This Internship comprised of two projects: Analysis of some crew data using SAS and analysis of the aircraft maintenance reports using text mining in R. The first project identifies and analyzes how different factors affected the crew ratio on different fleets. The goal of the second project is to study the maintenance logs which consisted of the work order description and work order action related to the aircrafts that were reported to go under maintenance.
Vijay Katta, A Study of Convolutional Neural Networks, August 2017, (Yan Yu, Edward Winkofsky)
The advent of Convolutional Neural Networks has drastically improved the accuracy of image processing. Convolutional Neural Networks in short CNNs, are presently the crux of deep learning applications in computer vision. The purpose of this capstone is to investigate the basic concepts of Convolutional Neural Networks in a stepwise manner and to build a simple CNN model to classify images. The study involves understanding the concepts behind different layers in CNN, studying the different CNN architectures, understanding the training algorithms of CNNs, studying the applications of CNNs, and applying CNN for image classification. A simple image classification model was designed on an ImageNet dataset which contains 70,000 images of digits. The accuracy of the best model was found to be 98.74. From the study, it is concluded that a highly accurate image processing model is achievable in a few minutes given the dataset has less than 0.1 million observations.
Yan Jiang, Selection of Genetic Markers to Predict Survival Time of Glioblastoma Patients, August 2017, (Peng Wang, Liwei Chen)
Glioblastoma multiforme (GBM) is the most aggressive primary brain tumor with survival time less than 3 months in >50% patients. Gene analysis is considered as a feasible approach for the predication of patient’s survival time. The advanced gene sequencing techniques normally produce large amount of genetic data which contain important information for the prognosis of GBM. An efficient method is urgently needed to extract key information from these data for clinical decision making. The purpose of this study is to develop a new statistical approach to select genetic markers for the prediction of GBM patient’s survival time. The new method named Cluster-LASSO linear regression model has been developed by combining nonparametric clustering and LASSO linear regression methods. Compared to the original LASSO model, the new Cluster-LASSO model simplifies the model by 67.8%. The Cluster-LASSO model selected 19 predictor variables after clustering instead of 59 predictor variables in LASSO model. The predictor genes selected for Cluster-LASSO model are ZNF208, GPRASP1, CHI3L1, RPL36A, GAP43, CLCN2, SERPINA3, SNX10, REEP2, GUCA1B, PPCS, HCRTR2, BCL2A1, MAGEC1, SIRT3, GPC1, RNASE2, LSR and ZNF135. In addition, The Cluster-LASSO model surpasses the out of sample performance of LASSO model by 1.89%. Among the 19 genes selected in the Cluster-LASSO model, the positively associated HCRTR2 gene and negatively associated GAP43 are especially interesting and worth of further study. A further study to confirm their relationship to the survival time of GBM and possible mechanism would contribute tremendously to the understanding of GBM.
Jing Gao, Patient Satisfaction Rating Prediction Based on Multiple Models, August 2017, (Peng Wang, Liwei Chen)
As the development of economy and technology, online health consultation provides a convenient platform which enables the patients seeking the suggestion and treatment quickly and efficiently, especially in China. Due to the large population density, physicians may need to take hundreds of patients every day at hospital, which is really time-consuming for patients. So there is no wonder why online health consultation grows so rapidly recently. Since healthcare service always related to issues of mortality and life quality for patients, hence online healthcare services and the patient satisfaction are always important to keep this industry running safely and efficiently. So in this project, we focus on the patient satisfaction. We integrate three levels of data (physician level, hospital level and patient level) into one. And we build multiple predictive models in order to know which independent variables have significant effects on the patient satisfaction rate as well as to check the precision of the models by comparison. This paper verifies that the physicians’ degrees of participation with the online healthcare consultation system as well as the hospital’s support affect the patient satisfaction significantly, especially the interactive activity such as total web visits, thanks letters, etc.
Jasmine Ding, Comparison Study of Common Methods in Credit Data Analysis, August 2017, (Peng Wang, Dungang Liu)
Default risk is an integral part of risk management at financial institutions. Banks allocate a significant amount of resources on developing and maintaining credit risk models. Binning is a method commonly used in banking to analyze consumer data to determine whether a borrower would qualify for a bankcard or a loan. The practice requires that numeric variables are categorized into discrete bins for further analyses based on certain cutoff values. The approach for grouping observations could vary from equal bin size to equal range depending on the situation. Binning is popular because of its ability to identify outliers and handle missing values. This project explores the basic methods that are commonly used for credit risk modelling, including simple logistic regression, logistic regression with binned variable transformation, and generalized additive models. After developing each model, a misclassification rate is calculated to compare model performance. In this study, the credit model based on binned variables did not produce the best results, both generalized additive model and random forest performed superior. In addition, the project also proposes other methods that can be used to improve credit model performance when working with similar datasets.
Sneha Peddireddy, Opportunity Sizing of Final Value Fee Credits, August 2017, (Michael Fry, Varun Vashishtha
The e-commerce company allows customers to “commit to purchase” an item and they charge the seller a fee (commission for sale) when this happens. If the actual purchase does not happen because of any reason, seller has to be refunded the fee amount as a credit. In this process, there are multiple reasons why a transaction could not be completed after “commit to purchase”. Also, there are cases where a transaction is taken off the website because of the mutual agreement between buyer and seller. This will result in loss of revenue for the company. The current project involves identifying the key reasons for an incomplete transaction and sizing the opportunity to minimize the credits payment for off platform transactions.
Krishna Teja Jagarlapudi, Solar Cell Power Prediction, August 2017, (Michael Fry, Augusto Sellhorn)
The rated power output from a solar cell is estimated through experimental measurements and theoretical calculations. However, it is difficult to obtain reliable prediction of the power output for varying weather conditions. With the advent of Internet of Things, it is possible to record exact power output from a solar cell over time. This data along with weather information can be used to build predictive models. In this project, a neural network model and a random forest model are built. The performance of the two models is compared using 10-fold cross validation, based on mean absolute error, and adjusted r-squared. It is seen that Random Forest performs better than neural network.
Mansi Verma, 84.51o Capstone Project, August 2017, (Michael Fry, Mayuresh Gaikwad)
84.51° is an analytics wing of Kroger which aims to make people’s life easier by achieving real customer understanding. It brings together customer data, analytics, business and marketing strategies for more than 15 million loyal Kroger Customers. It also collaborates with 300 CPG (consumer packages goods) Clients by driving awareness, trail, sales uplift, earned media impression and ultimately customer loyalty. Using the latest tools, technology and statistical techniques; 84.51° works towards producing insight on customer behavior with their spend data at the stores for business decisions. All goals of the company are centered towards customers at the center and not the profits only. Targeting the right customers is not an easy job. The objective of the customer targeting is to target right customer base and to know when to target them with what. This right kind of targeting not only drives sales but also saves business resources and maximizes profit. Kroger provides coupons in many channels being tills at the time of billing, emails, website, mobile app and direct mails that it sends to the best customers. This project aims to discuss about the model for best customer targeting for a direct mail campaign for a beauty CPG client for a new product launched.
Shengfang Sun, Human Activity Classification Using Machine Learning Techniques, August 2017, (Yichen Qin, Liwei Chen)
In this work, machine-learning algorithms are developed to classify human activities from wearable sensor data. The sensor data was collected from 10 subjects of diverse profile while performing a predefined set of physical activities. Three activity classifiers using the sensor metrics were trained and tested: random forest, Naïve Bayes and neural network. Performances of these classifiers were scored by leave-one-subject-out cross validation. The results show that neural network performs best with an accuracy rate of 85%. A closer look at the aggregated confusion matrix suggests that most activities of new subject can be predicted well by the pre-trained neural network classifier, despite that some activities appears to be very subject-sensitive and may require subject-specific training.
Sakshi Lohana, Market Basket Analysis of Instacart Buyers, August 2017, (Peng Wang, Uday Rao)
Market Basket Analysis is a modelling technique used to determine the unique buying behavior of customers. It can be used to formulate strategies to increase sales by suggesting customers what to buy next and providing promotions on relevant products of their choice. Through this project, Market Basket Analysis and Association Rules are explored using the dataset available on Kaggle.com. This data set is transactions by various users on an ecommerce website known as Instacart. After careful analysis, it is found that the items of daily use such as fruits, milk, sparkling water are ordered the most. Also, the proportion of reordered products is as high as 46% and hence customers can be encouraged to buy the same product again if they are satisfied with the buying experience the first time. There is high level of associations between different yoghurts, pet foods and organic items. A person buying organic cilantro is most likely to buy organic limes.
Sahil Thapar, Predicting House Sale Price, August 2017, (Dungang Liu, Liwei Chen)
Over the recent years we have seen that house prices can be an important indicator of the state of the country's economy. In this project, we will employ machine learning techniques to predict the final sales price for a house based on a range of features of the house. We know that houses can be the single biggest investment an individual makes in his lifetime. A sound statistical model can help the customer get a fair valuation of the house - both at the time of purchase and sale. The final house prices are a continuous variable and are predicted using linear regression. As a part of this project, regularization was performed to achieve simpler predictive models.
Pradeep Mathiyazagan, Website Duration Model, August 2017, (Yichen Qin, Yan Yu)
This capstone project is a natural extension of the Graduate Case Study that I worked on in the Spring Semester, 2017 as part of the Business Analytics program at University of Cincinnati. This will explore a bag-of-words model with user browsing data on the website of a local TV news station in Las Vegas owned by EW Scripps. The original Graduate Case Study did not afford us the time to explore a bag of words model as it involved a fairly large amount of web-scraping. Another worthwhile information I hope to include in this model is the amount of media elements present on a webpage in form of tweets, pictures and videos to analyze their impact on user engagement. Through this, we hope to identify pertinent information that results in better user engagement which would ultimately result in increased advertising revenue.
Rajul Chhajer, Forecasting Stock Reorder Point for Smart Bins, July 2017, (Michael Fry, John E. Laws)
Forecasting the reorder point plays an important role in efficiently managing the inventories. The reorder point is essentially the right time to order a stock considering the lead time to get the stock from the supplier and the safety stock available. It is difficult to determine the replenishment point if the sales information and lead time are unknown. In this study, historical reorder trends have been observed at product level for the forecasting. Apex ActylusTM smart bins have the ability to reorder stocks automatically based on the inventory level and it stores the information of all the past orders. The past reorders helped in understanding the velocity of a product present in a bin and then a moving average technique was used at product level to predict the next replenishment. The reorder point prediction would reduce the frequency of ordering and would help the floor managers in making better reorder plans.
Wei Yue, Analysis of Students’ Dining Survey, July 2017, (Peng Wang, Yinghao Zhang)
The goal of this project is to explore the factors that influence the customer experience the most under the designed circumstance. To achieve this objective, regression models were built to represent the relationship between customer experience and their basic information. The results of model building showed that the customer experience is not directly related to all the information provided by the survey. The survey results were supplied by randomly selected students from a University in Guangdong Province, China. The purpose of the survey is to help the restaurant management to better understand which dishes are more popular among students, and more importantly, if there are connections between dish ordering patterns and different students.
First, the students’ basic information was collected and categorized, such as, gender, major, frequency of dining out, etc. Then participants were asked to pick 5 dishes from eight categories of dishes on the menu with two in each category (16 in total) as they were dining in and then one out of the five dishes was randomly selected to be out of stock. Under this circumstance, participants need to pick one other dish to replace it. Then the customer experience was surveyed for analysis. The total number of participants is 98.
Gupta, Akash, Customer Segmentation and Post Campaign Analysis, July 2017, (Michael Fry, Naga Ramachandran)
A marketing campaign is a focused, tactical initiative to achieve a specific marketing goal.
Marketing activities require careful planning so that every step of the process is understood before you launch. Because a marketing campaign is tactical and project based, you need to map out the process from the initial promotional intent to the ultimate outcome. Based on that purpose, you need to set specific goals and metrics or key performance indicators (KPIs) that will help you determine how your campaign is performing against that goal and are helpful when creating or refining marketing strategies. It is important to track our marketing activities to results. Results will be determined by what our goals were for the campaign. But in most cases, results are usually in terms of sales or qualified leads and eventually applications.
Palash Siddamsettiwar, Internship at Tredence Analytics, July 2017, (Michael Fry, Sumit Mehra)
During my period of internship at Tredence Analytics, I was working as an analytics consultant to one of the biggest plumbing, HVAC&R and fire protection distributor in United States with more than $13 billion of yearly revenue. I was involved in building the Analytics capabilities in various divisions including supply chain, operations and products. My primary project involved working with warehouse managers and the head of data to understand how to cut down shipping costs to customers by optimizing modes of shipment and timing of delivery and thus, cutting down fixed and variable costs. By providing cost estimations for the options available, sales representatives and dispatchers would be able to make data-driven decisions rather than instinct-based ones.
My secondary project involved working with the products team and the ecommerce team to help them categorize their products using machine learning techniques. Within more than 3 million SKUs involved and more than 2 million of these still unclassified, the current pace and accuracy of classifying these products was not sustainable. Using machine learning would help these two teams to significantly reduce effort, time and money needed to classify the products and check the classifications. Both projects involve creation of a long-term, automated and real-time solution which will be integrated into their IT systems, to help people make quicker and more efficient decisions.
Jordan Adams, Forecasting Process for the U.S. Medical Device Markets, July 2017, (Yan Yu, Chris Dickerson)
The goal of this capstone is to build a forecasting process and model for Company X to forecast the US medical device market sales and share for Company X and all competitors. The forecasting process will be built using two data analytics tools to handle data management, data modeling, data visualization, and statistical analysis. The forecast process for the medical device market will involve conducting a baseline forecast using an array of time series forecasting methodologies, and adjusting the forecasts based on economic trends, competitive intelligence, market insights, and organizational strategies. The forecaster will have the flexibility to choose among many differing forecasts to select the model that they feel has the best predictability power, and the ability to cleanly visualize and explore each forecast in depth.
Aditya Singh, Churn Model, July 2017, (Michael Fry, Evan Cox)
The client is a cosmetics company based in New York City. The company has close to 9000 members globally, both men and women, from over 2250 companies in the beauty related industries. The primary reasons for becoming a member are as follows:
- Networking with other people in the beauty industry
- Find a career in the beauty industry
- Learn more about the latest trends in the beauty industry
- Get your product/company recognized at an awards event hosted by the company
A big percentage of the members churn after just one year of subscription. The goal is to identify patterns among these members who are likely to churn and eventually predict when a member is going to churn. A significant amount of time has been spent setting up the dataset before the modeling process. After, data cleaning and manipulation, I have built a Logistic Regression Model which predicts whether a member is going to churn or not.
Catherine Cronk, A Simulation Study of the City of Cincinnati’s Emergency Call-Center Data: Reducing Emergency Call Wait Times, July 2017, (David Kelton, Jennifer Bohl)
Emergency-response call centers are arguably one of the most important services a city can provide for its constituents. When a person calls 911 there is an expectation that the call will be answered and dispatched to the nearby emergency response department within seconds. In recent years, the total number of calls to 911 have increased, causing wait times to be up to 30 minutes for people contacting emergency services. The purpose of this simulation study is to analyze the current emergency call-center system and data for the City of Cincinnati and simulate alternate systems. The goal is to identify a better system that can achieve the City Administration’s goal of call takers’ answering 90% of 911 phone calls in under 10 seconds.
Michael Ponti-Zins, Inpatient Readmissions Reduction and MicroStrategy Dashboard Implementation, July 2017, (Michael Fry, Denise White)
Inpatient hospital readmission rates have been considered a major indicator of quality of care for several decades and have been shown to have a highly negative correlation with patient satisfaction. In 2017, the Ohio Department of Medicaid announced a 1% reduction in Medicaid reimbursement for all hospitals that are deemed to have excessive readmissions. In order to improve care and avoid potential payment reductions, Cincinnati Children’s Hospital created an internal quality improvement team focusing on readmissions reduction. In order to better understand the millions of data points related to readmissions, a dynamic dashboard was created using MicroStrategy, a business intelligence and data visualization tool. This dashboard was used to track the percentage of patients readmitted within 7 and 30 days of discharge, track why patients were returning, the percentage of readmissions that were potentially preventable, and other related aspects of each inpatient encounter. This information was used to identify targeted interventions to decrease future readmissions. These interventions included improved discharge and home medication instructions, automated email notification of providers, and data exports to assist in ad hoc analysis.
Ajish Cherian, Predicting Income Level using US 1994-95 Census Data, July 2017, (Peng Wang, David F. Rogers)
The objective of the project was to predict whether income exceeds $50,000 per year based on US 1994-1995 census data using different predictive models and comparing their performance. Since, the prediction to be made is a categorical value (income <=50K or >50K), the predictive models built were for classification. Models designed for the dataset were Logistic Regression, Lasso Regression, K-Nearest Neighbor, Support Vector Machine, Naive Bayes, Classification Tree, Random Forest and Gradient Boosting. Performance and effectiveness of all the models were evaluated using Area-Under the Curve (AUC) and Misclassification Rate. AUC and misclassification rate are calculated on the training and test datasets. However, for finalizing a model only metrics from the test dataset were used. Gradient Boosting performed best out of the selected models.
Rui Ding, Analysis of Price Premium for Online Health Consultations by Statistical Modeling, July 2017, (Peng Wang, Liwei Chen)
In this project, we focus on the mechanism of how the descriptive information of physicians and information of interactive reviews from patients will affect the price premium of online health consultation. Section 1 briefly introduces the definition of online health consultation and the techniques to be used in the project. Section 2 concentrates on the exploratory data analysis of the data set to obtain the overview of distribution of price premium and physicians. Section 3 discusses the analysis process of the data set by different modeling methods. The performance of each method is evaluated by in-sample, out-of-sample mean squared error and prediction error. Generalized linear modeling and mixed effect modeling demonstrate similar performance without obvious over fitting. Regression tree shows better prediction performance. However, tree-based bagging and random forest methods provide excellent performance with potential over fitting problem. Section 4 concludes the finding from the modeling and interprets the importance of the variables in the finalized models.
S.V.G. Sriharsha, Analysis of Grocery Orders Data, July 2017, (Yichen Qin, Jeffery Mills)
Objective of this analysis is to study order pattern of users of Instacart, a grocery delivering company and provide key insights about the customer behavior. There are 206209 users in the database and 49687 different products available to order through Instacart which can be characterized to 21 different departments. Current database consists of the details about 3421083 orders placed by the users over a certain amount of time. This analysis starts with exploration of variables then moves on to i) Association rule mining using apriori algorithm, ii) Unsupervised classification of customers based on their buying behavior using K-means clustering algorithm, iii) Product embedding using Word2Vec analysis and concludes with a summary of the results.
Linxi Yang, Analysis of Feedback from Online Healthcare Consultation with Text Mining, July 2017, (Peng Wang, Liwei Chen)
China has experienced rapid economic growth which benefited many industries but not the healthcare system. Because of the uneven economic development in China, not all residents can receive appropriate medical care. With an immature healthcare system and scarce medical resources for 1.3 billion people, the online healthcare consultation community in China now has become as popular as it is in other developed countries. The data was collected from an online healthcare consultation community, Good Doctor Community. Good Doctor Community (www.haod.com), which is the earliest and largest online healthcare consultation community in China, has been growing rapidly in the past 10 years. This research project will focus on how to improve the quality of service in the healthcare industry and provide insightful analysis for Good Doctor Community for future development by using text mining. Results show that the main purpose of visits is for treatment and diagnosis, and the main reason for choosing the physician is the online reviews and recommendation from friends, relatives, etc. There are 11,671 out of 22,625 respondents registered at the counter before they have seen physician, and 9,290 out of 22,625 respondents registered via an online system. The most frequent word appeared in the dataset is patient, and the most frequent word appeared in the dataset with dissatisfied review is impatient. By analyzing the sentiment of text, most patients have very positive sentiment and only 1/48 people have negative sentiment.
S. Zeeshan Ali, Image Classification with Transfer Learning, July 2017, (Peng Wang, Liwei Chen)
To correctly classify an image is a problem which has been there since the breakthrough of the modern computers. Nowadays because of techniques like deep learning there has been breakthroughs in this field. We will explore some techniques like transfer learning to classify the images in this project. We will also touch upon image feature extraction and modelling with image arrays. We will see this with a digit image dataset for simplicity.
Apoorv Joshi, Predicting Realty Prices Using Sberbank Russian Housing Data, July 2017, (Dungang Liu, Liwei Chen)
Sberbank is Russia’s oldest and largest bank. It utilizes historical property sale data to create predictive models for realty price and assists customers in making better decisions while renting or purchasing a building. The Sberbank Housing Dataset describes the property and the sub area to which it belongs in Moscow. The dataset contains 30471 observations and 292 variables. The variables are analyzed using Exploratory Data Analysis to see how they individually affect the price of a house. Further, the available data is cleaned, manipulated, and is used to fit models that can predict the house prices. Linear Regression, LASSO, Random Forest, and Gradient Boosting models were fit on the data, and we could make the predictions with sufficient accuracy.
Aishwarya Nalluri, Multiple Projects with Sevan Multi Site Solutions, July 2017, (Michael J. Fry, Doug Gafney)
Client Company A is a well-known fast food restaurant chain, spread across the world. Their business model in USA is divided into major FETs. In this project, an attempt has been made to map employees (supporting Company A but who are employed by Sevan Multi Site Solutions) working at different levels in a single dashboard. The tool used is Power BI. Main challenge is collecting data and preparing it for use in Power BI. The data had to be valid for representing in a dashboard and how the headshots can be embedded in the dashboard instead of simply specifying external hyperlinks.
QBR is a Quarterly Business Report which is presented to board members of the company. Every quarter a meeting is held and an opportunity is provided for each department to represent where they stand and what are the challenges they are facing. QBR is mainly focused on 4 aspects: people, clients, operations and finance. This methodology was introduced when the company started acquiring more projects from a variety of clients. As quarters passed by, many modifications have been made to the process of collecting required data and presenting it. The main challenge that the company faced is that there is no standard framework to work on QBR release reporting. The Finance team had issues collecting data, cleansing and representing it. As part of the solution to this challenge, a standard approach was formed using excel. The only effort needed by the Finance team now is loading a report from Quick books from excel which would automatically update all the reports. This solution has reduced their time by 50%.
Siva Ramakrishnan, The Insurance Company Benchmark (CoIL 2000), July 2017, (Yan Yu, Edward Winkofsky)
This project focuses on predicting potential customers for the Caravan Insurance Company. The dataset was used in the Computational intelligence and Learning(CoIL) 2000 challenge. It consists of 86 variables and includes product ownership data and socio-demographic data. The aim of the project is to classify customers as either buyers or non-buyers of the insurance policy. Six different models where developed including Logistic Regression, Classification Tree, Naïve Bayes, Support Vector Machine, Random Forest and Gradient Boosted trees. These models were evaluated based on the competition rules where contestants had to select a set of 800 observations from the test set of 4000. The logistic regression model performed better than all the other models.
Nitisha Adhikari, PD and LGD Modelling Methodology for CCAR, July 2017, (Michael J. Fry, Maduka S. Rupasinghe)
With the acquisition of First Niagara Bank in 2016 Key Bank acquired $2.6b Indirect Auto Portfolio. This was a new addition to the list of existing portfolios at Key and a Loss estimation model is being built to generate stressed loss forecasts for the Comprehensive Capital Analysis and Review (CCAR) and Dodd-Frank Act Stress Tests (DFAST). This document talks about the data preparation and modeling methodology for Probability of Default model (PD) and Loss given Default (LGD). The PD and LGD along with the Exposure at Default (EAD) are used to generate stressed loss forecasts for the CCAR and DFAST.
Venkat Kanishka Boppidi, Lending Club – Identification of Profitable Customer Segment, July 2017, (Dungang Liu, Liwei Chen)
Lending club issues unsecured loans to different segments of customers. The interest rate for the loan is dependent on the credit history of the customer and various other factors like income levels, demographics etc. The data of the borrowers is public. The current analysis has several objectives:
- To review the lending club dataset and summarize thoughts on LC risk profiles by loan type, grade, sub grade, loan amount, etc. using loan status of ‘Charged Off’ and ‘Default’, as indicators of a ‘bad loan’.
- To identify fraudulent customers (customers with no payment) in Lending Club data. The key characteristics of these fraudulent applications.
- To Identify best and worst categories by purpose (a category provided by the borrower for the loan request) in terms of risk.
- To build a statistical model using classification techniques and identify the less risky customer segment. These recommendations can be used to cross sell the loans for a customer segment which has low default rate and high profit.
Xiaojun Wang, Co-Clustering Algorithm in Business Data Analysis, July 2017, (Yichen Qin, Michael Fry)
In this project, we investigate a two-way clustering method and apply it to a business data set.
The classical clustering method is one-way. Given a data matrix, it is performed either on the whole row (observation-wise), or on the whole column (variable-wise). For example, in the well-known K-means method, all the variables involving in the distance measure either come from variables, or records, but not both. Co-clustering, also called bi-clustering or block clustering, is a two-way clustering method. It does clustering simultaneous on the rows and columns of a data matrix and turns the data into blocks. Our data set comes from a retail company that has hundreds of stores, each of which contains hundreds of business departments. Co-clustering analysis helps to group the data into blocks based on the similarity in productivity. Each block will consist of a group of departments and the corresponding group of stores they belong to. Our goal is to study these blocks so that business decisions can be made based on the information they bring with. The result we get shows co-clustering serves our purpose well.
Manisha Arora, Marketing Mix (Promotional Spend Optimization) for a Healthcare Drug, July 2017, (Michael Fry, Juhi Parikh)
The Healthcare Industry is one of the world’s largest and fastest-growing industries, consuming over 10% of GDP for most developed nations. Data and analytics are playing a major role in healthcare, allowing organizations the ability to make smart, impactful, data-driven decisions to mitigate risk, improve employee welfare and capitalize on the opportunities. This capstone project focusses on evaluating the effectiveness of its professional tactics for a particular drug, and optimizing its promotional spends, based on the channel effectiveness. This project analyzes each of the channels and would try to answer the following questions:
- What is the impact of each channel on the promotion of the drug?
- What is the average and marginal ROI for each channel?
- What would be the ideal spend levels per tactic and optimized based on a brand budget number?
Jayaram Kishore Tangellamudi, Predicting Housing Prices for ‘Sberbank’, July 2017, (Yan Yu, David F. Rogers)
Sberbank, Russia’s oldest and largest bank, helps their customers by making predictions about realty prices so renters, developers, and lenders are more confident when they sign a lease or purchase a building. Although the housing market is relatively stable in Russia, the country’s volatile economy makes forecasting prices as a function of apartment characteristics a unique challenge. Complex interactions between housing features such as number of bedrooms and location are enough to make pricing predictions complicated. Adding an unstable economy further complicates the predictions. Several regression models such as Linear Regression, General Additive Models (GAM), Decision Trees, Random Forest (RF), Support Vector Regression (SVR), Extreme Gradient Boosting (XGB) were built on the housing features alone to predict the housing prices. Additionally, economic indicator data was merged with Housing features data to check if these indicators can further explain the variance in the housing prices. The predictive model performances were compared using the Mean Square Error (MSE) of the logarithmic value of the housing prices.
Ramya Kollipara, Analysis of Income Influencing Factors in Different Professions, July 2017, (Dungang Liu, Liwei Chen)
Knowing the characteristics of a high/low income individual can be useful in marketing a new service targeted at potential customers within a salary range. There is always a cost involved in attracting the right customers, which the organization would always want to minimize. If a model was designed to accurately identify the right people in an income range, the cost could be significantly decreased with a higher rate of returns. The objective of this project is to explore and analyze the variables associated with an individual that might prove to be useful in understanding whether his/her income exceeds $50K/year, specially focusing on 3 different professions: Sales, Executive Managers, Professional Specialties. Various modelling techniques are explored and the different models are compared to see how some characteristics have a greater influence on certain professions compared to others and the most effective model is selected to accurately predict whether an individual’s income exceeds $50K/year based on the census data.
Shalvi Shrivastava, Black Friday Data Analysis, July 2017, (Yan Yu, Yichen Qin)
Billions of dollars are spent on Black Friday and the holiday shopping season. ‘ABC Private Limited’ has shared data of various customers for high volume products from the Black Friday month and wants to understand the customer purchase behavior (specifically, purchase amount) against various products of different categories. The challenge is to predict purchase amounts of various products purchased by customers based on the given historical purchase patterns. The data contained features like age, gender, marital status, categories of products purchased, city demographics etc. We were to build our models on the train data and validation data. The evaluation metric was RMSE, which also seemed a very appropriate choice for this problem.
Junbo Liu, Predicting Movie Ratings with Collaborative Filtering, July 2017, (Peng Wang, Zhe Shan)
Collaborative filtering, the most popular recommendation system, has been widely applied to virtually every aspect of people’s lives and has generated remarkable success in e-commerce. To make a relevant recommendation to an active user, recommendation system must be able to accurately predict the utility of items for this user because items with the highest utility (ratings in movie case) are recommended. Therefore, prediction accuracy is the key to success of a recommendation system. In this report, we compared three representative types of collaborative filtering approaches derived from three distinct rationales using movie ratings data. The three types are user-based collaborative filtering (UBCF), single value decomposition (SVD) and group-specific recommendation system (GSRS). The minimum root mean square error (RMSE) for UBCF is 0.9432 when the number of neighbor is set to 28. For SVD, the minimum RMSE is 0.9240 when the tuning λ is 0.17 and the number of latent factor is 19. For GSRS, the same number of latent factor of 19 is used and the cluster number of both users and items is set to default value of 10. When the λ value is 65, the RMSE for GSRS is 0.9007. Therefore, our results show that GSRS has the highest prediction accuracy, SVD next and UBCF last. They are consistent with the conclusion from publications.
Aditya Nakate, Talmetrix Inc, Cincinnati, July 2017, (Michael J. Fry, Ayusman Vikramjeet)
I am working as a Production Support Analyst Intern at Talmetrix at downtown Cincinnati. This company helps organizations capture feedback regarding the employee experience and analyses that data to help organizations attract desired talent and improve employee retention, performance and productivity. It helps organizations to make more informed decisions about their employees. Analysis or reports created by the company are mainly consumed by the human resource heads of the client company. During my internship, I am working on various projects including report generation and ad-hoc analysis. While working here, I have used technologies like SQL, R, Tableau etc. and have also used various statistical skills like classification algorithm and regression to name a few. This report contains the summary of the work I have done during my internship at Talmetrix. My first project at the company was about the driver’s analysis. This project was intended to find out the categories which are critical for employee satisfaction and which the clients need to focus on. Later, I also worked on a report generation process for one client. We had the employee feedback data. Employees were asked to take surveys which contained both type of questions: Likert’s and open-ended questions. Reports were created in tableau. Different views were created at levels such as overall, region, age-levels, Tenure levels, department, operating unit and suboperating units. Currently, we are generating more reports based on this one as clients are doing some deep-dives.
Suchith Rajasekharan, Allstate Insurance Claim Severity Analysis, July 2017, (Yichen Qin, Michael Magazine)
In the insurance industry, having the ability to accurately predict the loss amount of a claim is of paramount importance. Companies build predictive models based on different features of a claim and use the predictions from these models to apply proper claims practices, business rules and experienced resources to manage the claims. In this paper, we explore the different steps involved in building a model to predict the loss amount of a claim. A Kaggle dataset provided by Allstate Insurance is used for this study. Various machine learning techniques, viz, Multiple Linear Regression, Generalized Linear Model, Generalized Additive Model, Extreme Gradient Boosting, and Neural Networks are used to build different models. The models are implemented using various packages available in the open source software ‘R’. Models built using different techniques are compared based on their performance on a validation set and the best model is chosen. XGBoost model gave the best performance out of all the models. Therefore, it is chosen as the final model.
Mahesh Balan, Cash as a Product, July 2017, (Michael Fry, Fan Yang)
The project analyzed the potential of adding cash as an additional payment feature to more markets. The analysis quantified the pros and cons of cash. The economics of a cash vs non-cash trip on Uber was analyzed. The cash trip was economically beneficial to Uber compared to that of a non-cash trip. The project also deep dived into aspects such as driver and rider experience in a cash vs a non-cash trip. The experience for a non-cash trip appears to be seamless compared to that cash trip. The project also tried to quantify the risk and safety issues in a cash vs a non-cash trip. The non-cash trip appears to be safer and more trustworthy compared to that a cash trip. The project also looked at various ways to improve the existing economics and current rider/driver experience in a cash trip. The recommendations from the analysis was presented to the Growth and Product Team to improve the overall cash experience for a rider and driver in a cash trip.
Anitha Sreedhar Babu, eCommerce Marketing Analytics, July 2017, (Michael Fry, Maria Topken)
The client, a well-known online food delivery service in Cincinnati, is looking to engage its existing customers and increase the size and frequency of purchases. In order to understand the customer behavior and to drive revenue and engagement, customers were segmented based on frequency of orders and average lag between the orders. Customers were grouped into frequent shoppers, yearly shoppers, and one-time buyers. The data was also used to perform a market basket analysis to understand their purchase patterns. This information was used to drive recommendation engines as well as for effective cross selling of products to existing customers, by designing suitable combos. Targeted marketing strategies were developed based on the insights derived from the analysis.
Dhivya Rajprasad, Prediction of 30-Day Readmission Rate for Congestive Heart Failure Patients, July 2017, (Michael Fry, Scott Brown)
Prediction of readmission rates for patients has gained importance in the present healthcare environment for two major reasons. First, transitional care interventions have a role in reducing the readmissions among chronically ill patients. Second, there is an increased interest in using readmission rates as a quality metric with the Centers for Medicare and Medicaid Services (CMS) using the readmission rate as a publicly reported metric aimed at lower reimbursements for hospitals which have excess readmission rates according to reported risk standards. The objective of this project is to understand the factors which contribute to high readmission rates and predict the probability of a patient being readmitted. With a prediction model in place, hospitals will be able to better understand patient dynamics and provide better care while avoiding penalties for higher readmission rates. In this report, several different data mining, advanced statistical and machine learning techniques are explored and used to predict readmission rates. A comparison of the different techniques is also provided.
Prarthana Rajendra, Cincinnati Children’s Hospital and Medical Center, July 2017, (Jason Tillman, Michael Fry)
The scope of the project is to compute the metric usage of reports of various learning networks. This is done through the Extraction, Transformation, and Load processes. Data is extracted from various tables, transformed according to the requirements, and loaded into a single reporting database. The measures computed are then visualized in the form of graphs. SSIS, SSRS and SQL Server are the main technologies used in accomplishing this task. Packages were built in SSIS to automate these tasks and the resultant data sets can be viewed and analyzed through reports built using SSRS.
Matthew Murphy, Optimization of Bariatric Rooms and Beds within a Hospital, July 2017, (Michael Magazine, Neal Wiggermann)
Currently, hospitals do not have the ability to predict the quantity and type of specialty resources needed to care for specialty patients. This inability is especially problematic given the explicit and implicit cost of under or overestimating the need. Two such specialty resources are bariatric beds and bariatric rooms. According to the Center for Disease Control, the obesity rate within the United States adult population has risen to 36%. The increase in the obese population of the United States along with high costs for bariatric beds and dedicated bariatric rooms have necessitated investigating a better way to determine the proper number of bariatric rooms to construct, bariatric beds to own, and bariatric beds to rent. In this paper, we use simulation and probabilistic techniques along with queueing theory models to investigate the relationship between service level of severely obese patients and the number of bariatric rooms needed to reach a designated service level with such patients. Furthermore, we investigate and build a model that can be used to determine the optimal mix of beds to buy versus rent to minimize the overall cost of bariatric equipment for the entire hospital.
Soumya Gupta, Employee Attrition Prediction, July 2017, (Yan Yu, Peng Wang)
Every company wants to make sure that its employees especially the good ones continue to work for it. Losing valuable employees is very expensive for a company both monetarily and non-monetarily. In this project, we aim to predict whether an employee will leave the company. Three classification techniques —logistic regression, decision trees, and random forest —have been used for building the predictive models. Their results have been compared. Valuable employees have also been identified by making a few assumptions and separate models have been built for this set of employees since the cost of losing a valuable employee is much higher. The prediction accuracy of the random forest is quite high in this case.
Apurva Bhoite, Predicting Success of Students at Medical School, July 2017, (Peng Wang, Liwei Chen)
The University of Cincinnati’s College of Medicine wanted to conduct a study to explore the students’ information enrolled at the College of Medicine by exploring their MCAT scores, MMI scores, Academic Background, Race, and overall background. The College of Medicine also want to identify the most influential predictors in determining the success of the students at the medical school, and finally build a predictive model to do so. The main aim of this project was inference based. Thus, a lot of graphical exploratory analysis which included mainly box plots and bar plots faceted over variables were plotted to get an overall idea. Due to the high dimensionality of the data and less number of observations I used lasso subset selection with cross-validation to reduce the number of predictors. The modeling techniques Logistic Regression, Classification Trees and Random Forests were used to build the predictive model and compare its performance to select the best model. The College of Medicine can employ this model while admitting the students to the college.
Swapnil Sharma, Application of Market Basket Analysis to Instacart Transaction Data, July 2017, (Yichen Qin, Edward P. Winkofsky)
With the rise in online transactions, companies are trying to leverage the humongous data generated by the transaction activities to transform it to meaningful insights. Data Mining techniques can be used to develop a cross selling strategy for the products. Data scientists use predictive analytics to improve the customer experience of shopping online by developing models that predict which products a user will buy again, or try for the first time, or which products are bought together. In this paper, we analyze the trend in customer shopping behavior on the Instacart website for buying groceries. The data set was made public by Instacart—a same day grocery delivery service, for 3 million transactions of over 200,000 users. The data set is explored using the open source statistical learning tool R. Market Basket Analysis is done using the Apriori algorithm for various support levels, confidence and lift to suggest combinations of products to be included in a basket to cross sell the products on the platform. The model is developed to predict which previously purchased products will be in a user’s next order. The F-score measures the model’s performance.
Jasmine Sachdeva, Malware Analysis & Campaign Tracking, July 2017, (Michael J. Fry, Dungang Liu)
Any software that does something that causes harm to a user, computer, or network can be considered malware. Malware analysis is all about examining malware to understand how it may harm the device, what is its source, how it works, and how to destroy it. As the number of malware attacks hitting an organization is increasing every day, it is crucial to analyze and mitigate it to ensure the security of the sensitive data residing in the devices. This project is also about IT Security awareness programs that were conducted and analyzed enabling employees to become more vigilant, ensuring data and security is not breached within the organization.
William Newton, Concrete Compressive Strength Analysis, July 2017, (Yan Yu, Edward Winkofsky)
Concrete is an indispensable material in modern society. From roadways to buildings, humankind is literally surrounded and supported by this chemical bond comprised of relatively basic ingredients. Concrete is so ubiquitous today that it is often taken for granted. Many never question how concrete got here or how it can be trusted. Responsible for the construction of buildings thousands of years old, which in some cases still stand, the contained analyses seek to explain what concrete is and how its strength can be evaluated. Using principal components analysis and linear regression techniques, a dataset comprised of different concrete mixtures was analyzed. The analyses provide bases for reasonable inferences to be made about compressive strength and how different elements behave in the presence of others. But they also indicate that this particular dataset is not comprehensive enough to make reliable predictions regarding compressive strength of concrete.
Eric Nelson, Enhancing Staffing Tactics for Retailer Credit Card Customer Acquisition, July 2017, (Peng Wang, Justin Arnold)
Credit card companies across the country spend millions of dollars promoting their credit cards to consumers. Obtaining the attention and interest of a shopper can be extremely difficult, nonetheless so when a credit card is being promoted by a retailer whose marketing budget does not stand up to those of larger banks. To attract customers, many retailers set up in-store promotional activities to give customers a chance to learn more about the card. One such retailer invested in this strategy but required assistance determining which stores should receive marketing at which times as the required materials and staff are limited and expensive. To answer the question, this project looks at existing credit consumers through the lens of their shopping history. A model is used to determine which potential acquisition customers (“lookalikes”) are most similar to customers who already possess one of the retailer’s credit cards. A final tool shows which stores have the largest number of lookalike households and when those shoppers are in store and likely to notice the credit card promotional materials.
Nitish Puri, A Study of Market Segmentation and Application with Cincinnati Zoo Data, July 2017, (Yan Yu, Yichen Qin)
The process of dividing a market into homogeneous groups of customers is known as market segmentation. Customers can be grouped together based on where they live, other demographic factors or even their behavioral patterns. This project explains these along with other ways of grouping customers in the market, purpose of doing segmentation and the general process followed. Clustering is the main statistical technique used for performing segmentation. The two most commonly used algorithms are K-Means and Hierarchical Clustering, and they are explained in detail in this project. The final part of the project describes the membership data from Cincinnati Zoo, and segments the Cincinnati Zoo customers by performing K-Means clustering on this data.
Tauseef Alam, Internship with JP Morgan Chase Bank, July 2017, (Michael Fry, Yuntao Zhu)
The Chase Consumer & Community Banking (CCB) Fraud Modeling team at JPMorgan Chase & Co. is an analytical center of excellence to all fraud risk managers and operations across the bank. CCB Fraud Modelling team is responsible for building predictive models for managing fraud risk at transaction, account, and customer and application level. As part of CCB fraud modeling team my role is to build machine learning model for predicting Credit Card Bust out Account fraud. "Bust-out" fraud also known as sleeper fraud, is primarily a first-party fraud scheme. It occurs when a consumer applies for and uses credit under his or her own name, or uses a synthetic identity, to make transactions. The fraudster makes on-time payments to maintain a good account standing, with the intent of bouncing a final payment and abandoning the account. ("Bust-out fraud white paper" 2009 Experian Information Solutions, Inc.) I used GBM as my modelling technique for predicting fraud accounts. As part of the process I have created some independent variables and tuned model parameters to build the model. As part of our next steps we will enhance our model performance by including more features. Once the model is finalized it would be implemented and the scores generated from this model will be used in deciding whether the Credit Card account is fraud or not.
Xiaoming Lu, Investigating the Information Loss of Binning Variables for Financial Risk Management, July 2017, (Peng Wang, Dungang Liu)
In financial risk management, binning technique is widely used in the credit scoring field, especially in the scorecard development. Binning is defined as the process of transforming numeric variables into categorical variables and regrouping the categorical variables into new categorical variables. This technique is usually employed at the early stage of model development to coarsely select important variables for further evaluation. One potential problem of binning is the information loss due to transformation. To tackle this question, we performed automatic binning on the German Credit dataset using the “woeBinning” package. Then, we explored the potential information loss of binning in the development of several models using R, including logistic regression, classification tree and random forest. We employed residual mean deviance, OOB estimate of error rate, ROC Curve, symmetric and asymmetric misclassification rates (MR & AMR) to compare model performance. In general, there is little difference in the model performance for the original data and binning data, which means there is little information loss after binning the data.
Sushmita Sen, Digit Recognition with Machine Learning, July 2017, (Yan Yu, Liwei Chen)
Computer vision is a subject that piques everyone’s interest. As humans, we learn to see and identify objects very early and as such don’t give much thought to the process. But in the background an immensely complex architecture of neurons carry on this task. In pursuit of replicating this process, many fields of study have emerged. Machine learning and pattern recognition are among those. In this project, I have attempted to identify images of handwritten digits from the very popular MNIST dataset. I have used a very popular classifying algorithm Support Vector Machine and Neural networks and compared their results in this document.
Abhishek Rao, NBA’s Most Valuable Player of 2017, July 2017, (Yan Yu, Liwei Chen)
Analytics and sports have been around together for a while now, with advancements in sports technology, the application of analytics to sports increases with every passing day. A lot of decision making, scouting, recruiting, and coaching in this age has something to do with how they crunch their numbers. While it’s true that uncertainty in sports is the best thing, an increasing number of people are becoming proponents of analytics applied to Basketball. The nature of the sport makes it very suitable for statistical analysis. The plethora of variables and their interrelationships reveal some of the important facets of the game. Although it’s difficult to evaluate an individual’s ability through analysis of a team game, it reveals things that wouldn’t have been noticed by plain sight.
Gautam Girish, Predicting Wine Quality, July 2017, (Peng Wang, Yan Yu)
Wines have been produced across the world for hundreds of years. However, there are significant differences in the quality of the wine which may be due to several factors. These factors can range from alcohol content, pH of the wine, fixed and volatile acidity etc. In this paper, I am trying to predict the quality of wine based on several of these factors. Different modeling techniques will be used to determine the best model to predict the quality of wine. The prediction techniques used are Linear regression, Generalized Additive Models, Regression trees. Ensemble methods like Boosting and Random Forest have also been used. Principal Component Analysis will also be done to try and improve the model performance. The dataset has been obtained from Kaggle. All the ensuing analysis and model building has been done in R with the necessary packages. The R-squared values obtained from the test dataset is used as the metric for model comparison.
Keerthana Regulagedda, Diabetes Prediction In Pima Indian Women, July 2017, (Yan Yu, Michael Magazine)
The objective of the project is to predict diabetes in Pima Indian women based on different diagnostic measures. As the size of the data set in consideration is small and has missing values in some of the variables, models are built using algorithms that are robust to missing data. In order to achieve this, first data exploration is performed and all the predictor variables are analyzed, correlations and patterns in the data are noted. Based on the preliminary analysis, variable selection is done and initial prediction model is built using logistic regression technique by removing the records with missing data. While removing the missing data, half of the information is lost and as a result the logistic regression model built gave poor results in prediction with AUC as 0.6 and misclassification rate as 0.54. In the model building process, CART and Gradient boosting classification algorithms that handle missing data well are implemented and performance metrics are calculated. Missing data imputation is also done and effects of imputation on variable distributions are studied. Finally, models are built on complete data to see if the accuracy of prediction improves after imputation of missing values.
Rajarajan Subramanian, Predicting Employee Attrition Using Data Mining Techniques, July 2017, (Yan Yu, Edward Winkofsky)
For any organization, human resources form one of the many pillars of foundation to ensure its sustainability in the market. Employee satisfaction and attrition are two critical factors that impact its growth in the near future. They tend to have positive and n