1. Computer Science Department, Faculty of Media Engineering and Technology, German University in Cairo (GUC), New Cairo, Egypt
2. Department of Computer Science, Faculty of Mathematical Sciences and Informatics, University of Khartoum, Khartoum, Sudan
3. Department of Computer Science and Information Engineering, National Taipei University of Technology, Taipei, Taiwan
4. Department of Computer System and Technology, Faculty of Computer Science and Information Technology, Universiti Malaya, Kuala Lumpur, Malaysia
5. Department of Computer Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
6. Communications Department, Faculty of Information Engineering and Technology, German University in Cairo (GUC), New Cairo, Egypt