1. Department of Electrical Engineering, Copperbelt University, Kitwe, Zambia
2. Department of Mechanical Engineering, Copperbelt University, Kitwe, Zambia
3. Department of Physics, Mulungushi University, Kabwe, Zambia
4. Department of Mechanical Engineering, Rose-Hulman Institute of Technology, Terre Haute, IN, USA
5. Department of Electrical Engineering, University of Zambia, Lusaka, Zambia
6. Department of Chemical Engineering, Copperbelt University, Kitwe, Zambia