• Publications
  • Influence
Bridging the gap between physical location and online social networks
A novel set of location-based features for analyzing the social context of a geographic region, including location entropy, which measures the diversity of unique visitors of a location, are introduced. Expand
The Livehoods Project: Utilizing Social Media to Understand the Dynamics of a City
This work introduces a clustering model and research methodology for studying the structure and composition of a city on a large scale based on the social media its residents generate, and applies this new methodology to data from approximately 18 million check-ins collected from users of a location-based online social network. Expand
I'm the mayor of my house: examining why people use foursquare - a social-driven location sharing application
The results of three studies focusing on the foursquare check-in system are presented, both qualitatively and quantitatively, to understand how and why people use location sharing applications, as well as how they manage their privacy. Expand
The ATLAS Simulation Infrastructure
The simulation software for the ATLAS Experiment at the Large Hadron Collider is being used for large-scale production of events on the LHC Computing Grid. This simulation requires many components,Expand
School of phish: a real-world evaluation of anti-phishing training
Results of this study show that users trained with PhishGuru retain knowledge even after 28 days; adding a second training message to reinforce the original training decreases the likelihood of people giving information to phishing websites; and training does not decrease users' willingness to click on links in legitimate messages. Expand
Empirical models of privacy in location sharing
Locaccino, a mobile location sharing system, was deployed in a four week long field study, where the behavior of study participants who shared their location with their acquaintances was examined, showing that users appear more comfortable sharing their presence at locations visited by a large and diverse set of people. Expand
"i read my Twitter the next morning and was astonished": a conversational perspective on Twitter regrets
It was found that participants who posted on Twitter became aware of, and tried to repair, regret more slowly than those reporting in-person regrets. Expand
Readiness of the ATLAS Tile Calorimeter for LHC collisions
An overview of the Tile Calorimeter performance as measured using random triggers, calibration data, data from cosmic ray muons and single beam data and the determination of the global energy scale was performed with an uncertainty of 4%. Expand
Locaccino: a privacy-centric location sharing application
The purpose of this demo is to introduce participants to the features of Locaccino, so that they can try out thelocaccino smartphone and laptop applications on their own devices, locate their friends and colleagues, and set rich privacy policies for sharing their location. Expand
Making Sense of Group Chat through Collaborative Tagging and Summarization
Tilda, a prototype system that enables people to collaboratively enrich their chat conversation while conversing, is developed and found that teams actively engaged with Tilda both for marking up their chat as well as catching up on chat. Expand