1. Department of Civil and Architectural Engineering, College of Engineering, Sultan Qaboos University, Muscat, Sultanate of Oman
2. Department of Civil and Architectural Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoudh, P.C. 123, Muscat, Sultanate of Oman, Tel.: +(968) 2414-2543, Fax: +(968) 2414-1331
3. Department of Environmental and Sustainable Engineering, University at Albany, State University of New York (SUNY), Albany, NY, USA
4. School of Public Health, University of Alberta, Edmonton AB, Canada