1. Department of Physics, Federal University Lokoja, P.M.B., 1154 Lokoja, Nigeria
2. Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Lagos, Akoka, Lagos 100213, Nigeria
3. Department of Electrical Engineering and Information Technology, Institute of Digital Communication, Ruhr University, 44801 Bochum, Germany
4. S. N. Technology, Bhopal, India
5. Department of Mathematics, College of Science, King Khalid University, Abha, Saudi Arabia
6. Department of Computer Science & Engineering, Graphic Era Deemed to be University, Dehradun, Uttarakhand 248002, India
7. Department of Electrical and Computer Engineering, College of Engineering, Anderson University, Anderson, SC 29621, USA
8. Department of Electrical and Electronic Engineering, Technical University of Mombasa, Mombasa, Kenya