1. Department of Electrical and Information Engineering, Covenant University, Canaanland, P.M.B 1023, Ota, Nigeria
2. HRA, Institute for Systems Science, Durban University of Technology, P.O. Box 1334, Durban, South Africa
3. Department of Nursing, Durban University of Technology, Durban, South Africa
4. Schools of Mechatronic System and Engineering Science, Simon Fraser University, Surrey, BC V3T 0A3, Canada