Tekstiviesti: Context-Aware Systems and Applications, and Nature of Computation and Communication : 6th International Conference, ICCASA 2017, and 3rd International Conference, ICTCC 2017, Tam Ky, Vietnam, November 23-24, 2017, Proceedings / edited by Phan Cong Vinh, Nguyen Ha Huy Cuong, Emil Vassev.