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Mobile devices carried by people form dynamic networks. Understanding the social structures within the human mobility traces captured from the mobile devices help one to design more efficient message dissemination schemes. People who are in multiple communities are good message carriers. Thus, the ability to identify the different communities efficiently from the various communication traces e.g. contact traces from users' mobile devices are important. In this paper, using some human mobility traces from the real world, the authors first identify nodes that can play connector roles using some social network metrics e.g. position role centrality. Then, they investigate the usefulness of utilizing the connector nodes information in the design of multicast delivery schemes in human contact-based networks.
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