He received M.S. and Ph.D. degrees at Dept. of Computer Science Education in Korea University, Korea. His research interests include spatial query and index, spatio-temporal database, mobile data management, locationbased services, Spark, WSNs and mobile data mining. Daewon Lee received his B.S. in division of Electricity and Electronic Engineering from Soonchunhyang University, Asan, ChungNam, Korea in He received his M.E. and Ph.D. degrees in Computer Science Education from Korea University, Seoul, Korea in 2003 and He is currently a full time lecturer in the Division of General Education at SeoKyeong University in Korea. His research interests are in IoT, Mobile computing, Distributed computing, Cloud computing, and Fault-tolerant systems. 186 Copyright c 2015 SERSC