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| The Evolution of Social Networks Constructed by “Ice Bucket Challenge” |
| YANG Kai, LIU Xiaolu, LIN Jianhong, CHENG Xi, GUO Qiang, LIU Jianguo
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| Research Center of Complex Systems Science, University of Shanghai for Science and Technology, Shanghai 200093 |
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Abstract The evolutionary process of social networks at initial period is very important, especially for the quantitative understanding of the formation and the evolution of interpersonal relationships. In this paper, combining with the “Ice Bucket Challenge”, we collect the data of this event from the launch to the sixth day in our country. The nodes stand for the challengers and the edges are the relations of called people in the social networks. By analyzing the rules of the structural characteristics, including the network size, the clustering coefficient, density, network efficiency and connectivity sub-graphs, we find that the clustering coefficient increased from zero to 0.0167 at the beginning and then decreases; the densityof the network declines from 0.1209 over time; the network efficiency reduces by 81.4% at first and then slowly increases; the connected sub-graphs rapidly increases five times and then decreases; the network efficiency and the number of sub-graphs are negatively correlative. Taking into account the specificity of the network,we compare with evolution of other social networks.Thiswork will be helpful for understanding the law of the formation and development of the early social networks.
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Received: 29 October 2014
Published: 25 February 2025
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