Safe Dining Talk

An online recommender system to suggest safe eating places in your neighborhood

Transcript

1. Ahmad Haider Insight Data Science 2016
2. Personal Story What if I could find which restaurants are safe and which are not? Mugged @Parking lot ! L Hungry for Pizza! Closest pizza location
3. Makes Real-Time Recommendations for Safety Ratings Restaurants in a Neighborhood SafeDining app
4. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location Under the hood…
5. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location
6. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location
7. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location p1 p2 p3 p4 p5 p1 p2 p3 p4 p1 p2 p1 p2 p3 p4 p5 p6 p7 p8 p1 Crime Location Crime Probability
8. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location p1 p2 p3 p4 p5 p1 p2 p3 p4 p1 p2 p1 p2 p3 p4 p5 p6 p7 p8 p1 Crime Location Crime Probability 1. pRest 1. pRest 1. pRest 1. pRest pRest Crime Probability at restaurant
9. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location p1 p2 p3 p4 p5 p1 p2 p3 p4 p1 p2 p1 p2 p3 p4 p5 p6 p7 p8 p1 Crime Location Crime Probability 1. pRest 1. pRest 1. pRest 1. pRest pRest Crime Probability at restaurant pRest pRest pRest pRest pRest pRest pRest
10. I want to eat Pizza at 2+ rated restaurant within 3 miles of my location p1 p2 p3 p4 p5 p1 p2 p3 p4 p1 p2 p1 p2 p3 p4 p5 p6 p7 p8 p1 Crime Location Crime Probability 1. pRest 1. pRest 1. pRest 1. pRest pRest Crime Probability at restaurant pRest pRest pRest pRest pRest pRest pRest 2. Relative Safety Index 2. Relative Safety Index 2. Relative Safety Index 2. Relative Safety Index
11. Workflow Crime dataset Yelp search API Preprocessing Wrangling Defining classification problem Feature Engineering Choosing a model Validation 10-fold cross validation Cross entropy loss measure
12. ™  Multiclass Classification –  Predict the probability of crime at any hour at any given location –  Features: 35 -- Location (Lat., Long. etc.) , Time (dd, wk, mm, yyyy) –  Labels: 24 classes (hour of day) –  Logistic Regression ™  calibrated results ™  Minimum misclassified results ™  Lowest run time –  Cross entropy loss measure = 2.95 Classification
13. Theft Residential Burglary Robbery Assault Source: mylocalcrime.com Validation My analysis mylocalcrime.com
14. ™ A color coded ranked recommendation list of top 10 safest restaurants ™ Location of the restaurants relative to my location in a Google Map display ™ Crime heat map of the neighborhood, if I want to walk to a restaurant Recommendation summary
15. •  Ahmad Haider •  Georgia Tech •  PhD thesis: “Measurement of energy landscapes of biological interactions using Boltzmann sampling” •  Love hiking About Me