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Structure and evolution of online social relationship

, , , , and . Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)

Abstract

With the advancement in the information age, people are using electronic media more frequently for communications, and social relationships are also increasingly resorting to online channels. While extensive studies on traditional social networks have been carried out, little has been done on online social networks. Here we analyze the structure and evolution of online social relationship by examining the temporal records of a bulletin board system in a university. The obtained network exhibits interesting features: In contrast to a typical community network, the BBS network contains hub members who participate in many boards simultaneously but are strongly tied, that is, they have a large degree and betweenness centrality and provide communication channels between communities. On the other hand, intracommunities are rather homogeneously and weakly connected. Such a structure, which has never been emiprically characterized in the past, might provide a new perspective on the social opinion formation in this digital era. We also study the temporal evolution of such a network and compare it with existing models for weighted complex networks.

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