Mining, Modeling, and Recommending 'Things' in Social Media 4th International Workshops, MUSE 2013, Prague, Czech Republic, September 23, 2013, and MSM 2013, Paris, France, May 1, 2013, Revised Selected Papers - Atzmueller, Martin; Chin, Alvin; Scholz, Christoph; Trattner, Christoph (Springer International Publishing : Imprint: Springer, 2015)