Ubiquitous Social Media Analysis Third International Workshops, MUSE 2012, Bristol, UK, September 24, 2012, and MSM 2012, Milwaukee, WI, USA, June 25, 2012, Revised Selected Papers. Edited by Martin Atzmueller, Alvin Chin, Denis Helic and Andreas Hotho. Berlin, Heidelberg: Imprint: Springer, 2013.