This book constitutes the thoroughly refereed joint post-proceedings of
the Third International Workshop on Mining Ubiquitous and Social
Environments, MUSE 2012, held in Bristol, UK, in September 2012, and the
Third International Workshop on Modeling Social Media, MSM 2012, held in
Milwaukee, WI, USA, in June 2012. The 8 full papers included in the book
are revised and significantly extended versions of papers submitted to
the workshops. They cover a wide range of topics organized in three main
themes: communities and group structure in ubiquitous social media;
ubiquitous modeling and aspects of social interactions and influence.