1. BISITE Digital Innovation Hub, University of Salamanca, Calle Espejo 2, 37007 Salamanca, Spain
2. School of Information and Communication Engineering, Sunchon National University, Suncheon, Republic of Korea
3. Department of Electronics, Information and Communication, Faculty of Engineering, Osaka Institute of Technology, 535-8585 Osaka, Japan
4. Pusat Komputeran dan Informatik, Universiti Malaysia Kelantan, Karung Berkunci 36, Pengkaan Chepa, 16100 Kota Bharu, Kelantan, Malaysia