Silvia Gabrielli, Dirk Elias, Kanav Kahol: Ambient Media and Systems - Second International ICST Conference, AMBI-SYS 2011, Porto, Portugal, March 24-25, 2011, Revised Selected Papers. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 70, Springer 2011, ISBN 978-3-642-23901-4