Online social networks (OSNs) like Facebook, Twitter, etc. are excellent media for viral marketing. One of the fundamental problems for viral marketing in OSNs is the influence maximization (IM) problem, where the company aims at reaching a widespread product adoption via word-of-mouth effect by providing free samples of a product…... Read More

Overlapping users of social networks such as Facebook and Twitter link these online social networks into a multiplex of social networks. As different components of the multiplex may have different properties, the multiplex may exhibit emergent phenomena that isn’t present in the simpler case of single layer social networks. For…... Read More

As an imperative channel for rapid information propagation, OSNs also have their disruptive effects. One of them is the leakage of information, i.e., information could be spread via OSNs to the users whom we may not willing to share with. Thus the problem of constructing a circle of trust to…... Read More