Evaluating AAL Systems Through Competitive Benchmarking. Indoor Localization and Tracking International Competition, EvAAL 2011, Competition in Valencia, Spain, July 25-29, 2011, and Final Workshop in Lecce, Italy, September 26, 2011. Revised Selected Papers - Chessa, Stefano; Knauth, Stefan (Springer Berlin Heidelberg : Imprint: Springer, 2012)