In: Shlomo Berkovsky; Francesca Carmagnola; Dominikus Heckmann; Tsvi Kuflik (Hrsg.). Proceedings of the 7th International Workshop on Ubiquitous User Modelling. Workshop on Ubiquitous User Modeling (UbiqUM-09), located at User Modeling, Adaptation, and Personalization, June 22, Trento, Italy, Pages 33-36, 2009.