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Epidemic content dissemination in Opportunistic Social Networks (OSN) has been analyzed in depth, theoretically and empirically. Most related works have studied the pair-wise contact history among nodes in conference or campus environments. The authors claim that given the nature of these networks, this approach leads to a biased understanding of the content dissemination process. They design a methodology to break OSN traces down into "Temporal communities", i.e., groups of people who meet periodically during an experiment. They show that these communities correlate with people's social communities. As in previous works, they observe that efficient content dissemination is mostly due to high contact rate nodes.
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