Structure and Dynamics of Social Networks - Toward Comprehension and Prediction of Human Social Behavior Lectures on 2/6(Mon), 7(Tue), 9(Thu), and 10(Fri) will be broadcasted live via USTREAM | Date | February 6-10, 2012 | Place | Seminar Room 7, Faculty of Mathematics building, Ito Campus Access,Ito Campus map | Program | 6 February 2012, Monday, 10:30~12:00 Title:Learning to Predict Social Influence in Complex Networks Author:Kazumi SAITO (University of Shizuoka) Abstract:We observe human social interaction as a process over a large-scale social network in a wide variety of on-line settings, like Blog (Weblog) communications, e-mail exchanges and so on. In our research, we focus on this kind of on-line societies including Blogosphere and sites such as for social networking, knowledge-sharing and media-sharing in the World Wide Web, through which behaviors, ideas and opinions can spread. Clearly, the evolution of social entities in these on-line societies also reflects complex social structures and distributed social trends. Thus, it is worth putting some effort to attempt to find empirical regularities and develop explanatory accounts of social influence in these complex networks. In this talk, we present a series of methods for learning to predict social influence in complex networks, which have been developed by our research group. We consider that these methods contribute to understanding basic mechanisms of social evolution like opinion formation processes in our society. 7 February 2012, Tuesday, 10:30~12:00 Title:Epidemic models on Complex Networks Author:Takehisa HASEGAWA (Tohoku University) Abstract: Epidemic models, such as susceptible-infected-susceptible (SIS) model and susceptible-infected-recovered (SIR) model, are used to model computer virus spreading, information propagation, and rumor spreading, etc. In this talk, we introduce recent studies about epidemic models on complex networks and discuss some unsolved problems. We also discuss the percolation transition of networks based on epidemics. 8 February 2012, Wednesday, 10:30~12:00 Title:Recommender and Purchasing Behavior on Web Marketing Author:Yoshimi OKADA (Marketing & Technology Labs., IMJ corporation) Abstract: The company has the common purpose of offering more of its products and services to those who want them. It is important in that context that increasing attention and resources has recently been allocated to web marketing. In this session, the recommender system connecting consumers and businesses, and marketing activities that help consumers' purchase decision making will be discussed. 9 February 2012, Thursday, 10:30~12:00 Title:Geographical network constructions by fractal-like hierarchical divisions -for future communication networks- Author:Yukio HAYASHI (JAIST) Abstract: With a review of recent studies in complex network science, we introduce and discuss the self-organization methods for constructing communication networks embedded on a geographical space. In particular, we will show that the proposed model based on a self-similar tiling has superior properties for both efficient routing and robustness of connectivity, and that the growing process is related to a Markov chain and a difference equation in a theoretical viewpoint. 10 February 2012, Friday, 10:30~12:00 Title:Information Sharing on the Twitter during The Great East Japan Earthquake Author:Fujio TORIUMI (Graduate School of Information Science, Nagoya University) Abstract: Under the catastrophic situation which occurred by The Great East Japan Earthquake, Many people used social media to communicate and share information through the series of earthquake events and aftershocks. We analyzed over 300 million tweets and the Twitter network in Japan before and after the earthquake, which revealed the earthquake that occurred in the Twitter milieu itself. | | | | |