1. School of Computer Science and Engineering, Northeastern University, Shenyang, China
2. Department of Computing and Mathematics, Manchester Metropolitan University, Manchester, U.K.
3. School of Management, Nanchang University, Nanchang, Jiangxi, China
4. Department of Information Systems, Faculty of Computing and Information Technology in Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
5. College of Computer Engineering and Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
6. Global Information and Telecommunication Institute, Waseda University, Shinjuku, Tokyo, Japan