1. Department of Mechanical Engineering Science University of Johannesburg, P. O. Box 524 JOHANNESBURG SOUTH AFRICA
2. Department of Mechanical Engineering University of Ilorin, P. M. B. 1515 ILORIN NIGERIA
3. Department of Materials and Metallurgical Engineering University of Ilorin, P. M. B. 1515 ILORIN NIGERIA
4. CSIR National Laser Centre; P. O. Box 395 PRETORIA SOUTH AFRICA
5. Department of Mechanical Engineering Butterworth Campus Walter Sisulu University Private Bag X3182 BUTTERWORTH 4960 SOUTH AFRICA
6. Okayama University 1 Chome-1-1 Tsushimanaka, Kita Ward OKAYAMA 700-8530 JAPAN
7. Jomo Kenyatta University of Agriculture and Technology 62000-00200 NAIROBI KENYA
8. Directorate Pan African University for Life and Earth Sciences Institute (PAULESI) NIGERIA.