1. Department of Manufacturing, Industrial and Textile Engineering, School of Engineering, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
2. Department of Information and Communication Technology, Moshi Co-operative University, P.O. Box 474, Moshi, Tanzania
3. Department of Electrical and Electronics Engineering, College of Science and Technology, University of Rwanda, P.O. Box 3900, Kigali, Rwanda
4. Department of Polymer, Industrial and Textile Engineering, Faculty of Engineering, Busitema University, P.O. Box 236, Tororo, Uganda