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AIC Seminar Series

Modeling Social Network Event Data over Time

Padhraic SmythUniversity of California, Irvine[Home Page]

Notice:  Hosted by Ramesh Nallapati

Date:  2012-09-06 at 12:00

Location:  EK255 (SRI E building)  (Directions)

   Abstract

Social network data in the form of time-stamped events, such as email or text communications over time between individuals, is of increasing interest both to computer scientists and social scientists. In this talk I will describe recent work on analyzing and modeling such data, both from an individual (egocentric) viewpoint as well as from a global network perspective. These problems typically involve a combination of different data types: relational information (who talks to who), temporal signals (when events occur over time), and text content (what the communication events are about). We will discuss models that use latent variables for modeling network structure, time-varying Poisson processes for modeling of event rates, and topic models for message content. Experimental results will be presented comparing different modeling approaches using a variety of real-world event-based network data sets. The talk will conclude with some speculative comments on future research directions.

   Bio for Padhraic Smyth

Padhraic Smyth is a Professor at the University of California, Irvine, in the Department of Computer Science with a joint appointment in Statistics, and is also Director of the Center for Machine Learning and Intelligent Systems at UC Irvine. His research interests include machine learning, data mining, pattern recognition, and applied statistics and he has published over 150 papers on these topics. He was a recipient of best paper awards at the 2002 and 1997 ACM SIGKDD Conferences, received the ACM SIGKDD Innovation Award in 2009, and was named a AAAI Fellow in 2010. He is co-author of Modeling the Internet and the Web: Probabilistic Methods and Algorithms (with Pierre Baldi and Paolo Frasconi in 2003), and co-author of Principles of Data Mining, MIT Press (with David Hand and Heikki Mannila in 2001).

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