1. Sheikh Taimur Academic Block-II, Department of Mathematics, University of Peshawar, Khyber Pakhtunkhwa, Pakistan
2. Building and Construction Department, Shaqlawa Technical College, Erbil Polytechnic University, Erbil, Iraq
3. Computer Engineering Department, College of Computer and Information Sciences, King Saud University, Riyadh, Saudi Arabia
4. School of Continuing Studies, McGill University, Quebec, Canada