Context-Aware Systems and Applications, and Nature of Computation and Communication 8th EAI International Conference, ICCASA 2019, and 5th EAI International Conference, ICTCC 2019, My Tho City, Vietnam, November 28-29, 2019, Proceedings - Vinh, Phan Cong; Vinh, Phan Cong; Rakib, Abdur; Rakib, Abdur (Springer International Publishing : Imprint: Springer, 2019)