1. Department Electrical Engineering, Tshwane University of Technology, South Africa
2. French South African Institute of Technology (F’SATI), Tshwane University of Technology, South Africa
3. Ecole Supérieure d’Ingénieurs en Électrotechnique et Électronique, France
4. Department of Chemical, Metallurgy and Material Engineering, Tshwane University of Technology, South Africa