Ubiquitous computing and ambient intelligence : context-awareness and context-driven interaction : 7th International Conference, UCAmI 2013, Carrillo, Costa Rica, December 2-6, 2013 : proceedings - Urzaiz, Gabriel; Urzaiz, Gabriel; Ochoa, Sergio F.; Ochoa, Sergio F.; Bravo, José 1954-; Bravo, José 1954-; Chen, Liming Luke; Chen, Liming Luke; Oliveira, Jonice; Oliveira, Jonice (Lecture notes in computer science / series editors Gerhard Goos, Juris Hartmanis, Jan van Leeuwen, 2013)