1. Department of Computer Science, School of Computer Science and Informatics, University College Dublin, Dublin, Ireland
2. Institute for International Strategy, Tokyo International University, Saitama, Japan
3. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
4. Department of Computer Science, College of Science and Arts-Sharourah, Najran University, Sharourah, Saudi Arabia
5. Department of Math, Turubah University College, Taif University, Taif, Saudi Arabia
6. Department of Information Systems, College of Computer Science and Information Systems, Najran University, Najran, Saudi Arabia
7. Department of Computer Science, Faculty of Computer Science and Information Technology, University of Science and Technology, Khartoum, Sudan