1. Department of Electrical Engineering, University of Cape Town, Cape Town, South Africa
2. Department of Computer Science and Electrical Engineering, School of Computing and Engineering, College of Science, Engineering and Technology, University of South Africa, Johannesburg, South Africa
3. Department of Electrical and Computer Engineering, College of Engineering, Anderson University, Anderson, SC, USA
4. School of Computing (Innovations and Technology), University of Vaasa, Vaasa, Finland
5. Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Lagos, Akoka, Lagos, Nigeria
6. Department of Computer Science, College of Computing, Khon Kaen University, Khon Kaen, Thailand