Putrada, A.G., Ramadhan, N.G. and Abdurohman, M. 2020. Context-Aware Smart Door Lock with Activity Recognition Using Hierarchical Hidden Markov Model. Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control. 5, 1 (Feb. 2020), 37-44. DOI:https://doi.org/10.22219/kinetik.v5i1.904.