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Events for May 20, 2016
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AI SEMINAR
Fri, May 20, 2016 @ 11:00 AM - 12:00 PM
Information Sciences Institute
Conferences, Lectures, & Seminars
Speaker: James Gleeson, Professor, University of Limerick
Talk Title: Competition and avalanches in social spreading phenomena
Series: AI Seminar
Abstract: We consider the spreading of memes (distinct pieces of information like ideas, hashtags, URLs, etc.) on a large directed social network, like Twitter. We use a branching-process model to describe how users choose among multiple sources of incoming information, similar to models used in other studies, which rely on intensive computational simulations to fit to data. In contrast, we here develop analytical insights into the respective roles of the network degree distribution, the memory-time distribution of users, and the competition between memes for the limited resource of user attention. The result is a form of self-organised criticality, which we dub competition-induced criticality. Using this analysis, we fit the model to data on Twitter hashtags, and predict features of the time-dependent data. This work is in collaboration with Yamir Moreno, Raquel A. Baños (both Universidad de Zaragoza), and Kevin O Sullivan (University of Limerick)
Biography: Professor James Gleeson holds the Chair in Industrial and Applied Mathematics at the University of Limerick. He is a graduate of University College Dublin in Mathematical Sciences and Mathematical Physics and received his PhD in Applied Mathematics from Caltech in 1999. Following his graduation from Caltech, he was a visiting assistant professor in Arizona State University, and then moved to University College Cork for 7 years, before taking up his current position at the University of Limerick. He is an Associate Editor of the Journal of Complex Networks; is a council member of the European Consortium for Mathematics for Industry, and was appointed to the Irish Research Council by Minister Sean Sherlock in 2013. As co-director of MACSI, the Mathematics Applications Consortium for Science and Industry, he leads research into applications of mathematics to real-world problems with significant economic and social impact. His research interests include stochastic dynamics and contagion on complex networks
Host: Kristina Lerman
Webcast: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=fff38167d27a42cc9a0ad981a082d7c71dLocation: Information Science Institute (ISI) - 1135 - 11th fl Large CR
WebCast Link: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=fff38167d27a42cc9a0ad981a082d7c71d
Audiences: Everyone Is Invited
Contact: Alma Nava / Information Sciences Institute
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NL Seminar-Natural Language Communication with Computers
Fri, May 20, 2016 @ 03:00 PM - 04:00 PM
Information Sciences Institute
Conferences, Lectures, & Seminars
Speaker: Yonatan Bisk, USC/ISI
Talk Title: Natural Language Communication with Computers
Series: Natural Language Seminar
Abstract: We propose a framework for devising testable algorithms for bridging the communication gap between humans and robots. We begin with a setting in which humans give instructions to robots using unrestricted language commands, with instruction sequences aimed at building complex goal configurations in a blocks world. I will present details of our data-collection effort, and preliminary results on action understanding. Time permitting, I will present new baseline results for flipping the semantic parsing paradigm to address the problem of language generation, where a human performs commands produced by a machine to demonstrate basic two-way communication.
Biography: Yonatan Bisk received his PhD from UIUC in 2015 under Professor Julia Hockenmaier and is now a Postdoc with Daniel Marcu at ISI.
Host: Xing Shi and Kevin Knight
More Info: http://nlg.isi.edu/nl-seminar/
Location: Information Science Institute (ISI) - 6th Floor -CR # 689; ISI-Marina del Rey
Audiences: Everyone Is Invited
Contact: Peter Zamar
Event Link: http://nlg.isi.edu/nl-seminar/
