1. Department of Civil Engineering, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia
2. Energy Research Unit, Al-Hawija Technical Institute, Northern Technical University, Kirkuk 36001, Iraq
3. Department of Reconstruction and Projects, University of Baghdad, Baghdad 10071, Iraq
4. Faculty of Engineering, Sohar University, Sohar 311, Oman
5. Northern Technical University, Mosul 41002, Iraq
6. Civil and Environmental Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia