1. University of South Africa,Department of Mechanical Engineering,Florida,South Africa
2. Tshwane University of Technology,Department of Industrial Engineering,Pretoria,South Africa
3. Federal University Oye Ekiti,Department Mechanical Engineering,Oye Ekiti,Nigeria
4. Afe Babalola University,Department of Industrial Chemistry,Ado Ekiti,Nigeria
5. Landmark University,Department of Mechanical Engineering,Omu-Aran,Nigeria