Advance in Safe and Useful Social Network Services with Context-Sensitive Data in Cyber-Physical System

1 Department of Computer Engineering, Mokpo National University, Muan, Jeonnam 534729, Republic of Korea 2Department of Informatics, J. E. Purkinje University, Ceske mladeze 8, 400 96 Usti nad Labem, Czech Republic 3 AGH University of Science and Technology, 30 Mickiewicza Avenue, 30-059 Krakow, Poland 4 Institute of Engineering-Polytechnic of Porto, 4200-072 Porto, Portugal 5 GECAD-Knowledge Engineering and Decision Support Group, 4200-072 Porto, Portugal