Ambient Intelligence 15th European Conference, AmI 2019, Rome, Italy, November 13-15, 2019, Proceedings - Chatzigiannakis, Ioannis; Chatzigiannakis, Ioannis; De Ruyter, Boris; De Ruyter, Boris; Mavrommati, Irene; Mavrommati, Irene (Springer International Publishing : Imprint: Springer, 2019)