id author title date pages extension mime words sentences flesch summary cache txt cord-238444-v9gfh3m1 Maghdid, Halgurd S. A Smartphone enabled Approach to Manage COVID-19 Lockdown and Economic Crisis 2020-04-25 .txt text/plain 3833 224 59 Further, authorities use case quarantine strategy and manual second/third contact-tracing to contain the COVID-19 disease. In this paper, we developed a smartphone-based approach to automatically and widely trace the contacts for confirmed COVID-19 cases. From a technical standpoint, we summarise the most important contributions of this paper as follows: 1) We build a tracking model based on positional information of registered users to conduct contact-tracing of confirmed COVID-19 cases. The best thing to do seems to be let people go out for their business, but any body tests positive of COVID-19, we would be able, through proposed framework, to trace everybody in contact with the confirmed case and managing the lockdown and mass quarantine. In this study, K-means as an unsupervised machine learning algorithm is used to cluster the users' positions information and predict that the area should be locked down or not based on same empirical thresholds. ./cache/cord-238444-v9gfh3m1.txt ./txt/cord-238444-v9gfh3m1.txt