N. K. Al-Shammari
http://www.uoh.edu.sa/en/Subgates/Faculties/CM/Departments/ME/Pages/Members.aspx

Mechanical Engineering Department, University of Hail, Saudi Arabia

Mechanical Engineering Department, University of Hail, Hail, Saudi Arabia

S. M. H. Darwish
Industrial Engineering Department, King Saud University, Saudi Arabia

Industrial Engineering Department, King Saud University, Riyadh, Saudi Arabia