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Community activity analysis in social media.

The goal is to investigate the structure, evolution, and practices of communities in social media with Flick as a target. In particular, using statistical models relying on textual and social metadata, the project will model the dynamical aspect of social media groups (including topic and memberships patterns), study and discover micro-activity patterns within sub-groups, and investigate the use of visual information extracted from photos and videos to refine user and group descriptions.

While each of the sub-projects pursues its own goals, the grounding of the approaches on similar principled methodologies (e.g. bag-of-words and Bayesian topic models) will provide opportunities for research synergies and the strengthening of Idiap's activities on human behavior and interaction modeling.