1. Department of Geoscience and the Environment, Technical University of Kenya, Nairobi, Kenya
2. Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg South Africa
3. Department of Mechanical Engineering, Dedan Kimathi University of Technology, Nyeri-Kenya
4. Department of Materials and Metallurgical Engineering, University of Ilorin, Ilorin Nigeria
5. Directorate, Pan African University Institute of Earth and Life Sciences (PAULESI), University of Ibadan, Nigerian