Electrical Engineering and Computer Science

Software Seminar

Information Diffusion in Online Social Networks: From Analyzing Trends to Stopping Misinformation

Amr El Abbadi

Professor
University of California, Santa Barbara
 
Thursday, November 17, 2011
12:30pm - 2:00pm
3725 Beyster Bldg.

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About the Event

Social networks provide great opportunities for social connection, learning, political and social change, as well as individual entertainment and enhancement in a wide variety of forms. Online social networks also provide unprecedented amounts of information about social interaction and provide opportunities to study social interactions on a scale and at a level of detail that has never been possible before. In this talk, we will consider ways of systematically exploring the vast space of on-line social network problems. Namely, we will consider three dimensions; understanding, managing and reporting on social networks and focus on example studies relating to these dimensions. We will focus on two applications: limiting the spread of misinformation in social networks and trend analysis. In the former problem, we study the notion of competing campaigns in a social network, and explore the spread of influence in the presence of such competing campaigns. In particular, we develop protocols whose goal is to limit the spread of misinformation by identifying a subset of individuals that need to be convinced to adopt the competing (or "good") campaign so as to minimize the number of people that adopt the "bad" campaign . The second problem is motivated by the critical role the identification of popular and important topics plays in better understanding societal concerns. We propose two novel structural trend definitions referred to as "coordinated" and "uncoordinated" trends that use friendship information to identify topics that are discussed among clustered and unconnected users respectively. Our analyses and experiments show that structural trends are significantly different from traditional trends and provide new insights into the way people share information online.

This work was done jointly with Divyakant Agrawal and Ceren Budak.

Biography

My research interests are in the fields of fault-tolerant distributed systems and databases. I have designed several protocols for highly available fault-tolerant systems and have also been involved in designing systems and database support for geographic information systems and collaborative environments. Recently, I have been especially interested in exploring efficient ways for retrieving data in a distributed library as well as content-based searching using multi-dimensional index structures. I am currently involved in several research projects including Alexandria for building a distributed digital library (not to be confused with the ancient library of Alexandria ), an NSF sponsored data summarization project Yangtze , and an NSF sponsored project on leveraging advanced hardware for data stream managment

Additional Information

Contact: Stephen Reger

Phone: 734-764-9401

Email: sereger@eecs.umich.edu

Sponsor: SSL

Open to: Public