1. Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
2. Department of Signal Theory and Communications, Universidad Carlos III de Madrid, Leganés, Spain
3. Department of Information Systems and Computer Science, Ahmed bin Mohammed Military College (ABMMC), Doha, Qatar
4. Department of Management and Tourism Studies, Oman Tourism College, Muscat, Oman
5. School of Computer Science & Mathematics, Liverpool John Moores University, Liverpool, U.K