1. School of Civil Engineering, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia
2. Civil Engineering Department, Palestine University, Gaza Strip, Palestine
3. Civil Engineering Department, Antalya International University, Dosemalti, Turkey
4. Environmental Engineering Technology Department, Malaysian Institute of Chemical and Bioengineering Technology Universiti Kuala Lumpur, (UniKL, MICET), Melaka, Malaysia