Cell Phone Surveillance & Tracking

GPS and Cell Phone Tracking: A Constitutional and Empirical Analysis

MAPS: Machine-based Automatic Phone Surveillance

Exploring potential threats to electronic media has been an area of active interest in computer security for the purpose of prevention of these threats. We examine a threat scenario that involves eavesdropping on phones with virtual keypads, a class of phones becoming increasingly popular by the day. We explore an approach to automatically recover the text that was typed by a person on his phon...

Applications of Quantum Dots in Cell Tracking

Tracking cells after transplantation is always one the main concerns of researchers in the field of regenerative medicine. Finding a tracer with long stability and low cytotoxicity can be considered as a solution for this issue. Semiconductor nanocrystals, also called quantum dots (QDs), have unique photophysical properties which make them as suitable candidate in this setting. Broad-range exci...

Tracking Employment Shocks Using Mobile Phone Data

Can data from mobile phones be used to observe economic shocks and their consequences at multiple scales? Here we present novel methods to detect mass layoffs, identify individuals affected by them and predict changes in aggregate unemployment rates using call detail records (CDRs) from mobile phones. Using the closure of a large manufacturing plant as a case study, we first describe a structur...

Detection and Tracking for Surveillance

This tutorial will cover problems related to detection and tracking from surveillance video. For detection, I will cover background subtraction for fixed and pan/tilt/zoom cameras, shape-based detection using machine learning techniques, and the use of periodic motion models to discriminate people from other moving objects in video. For tracking, I will discuss discus basic representation and c...