1. Assistant Professor, Dept. of Civil Engineering, Sultan Qaboos Univ., P.O. Box 33, Al-Khod, PC 123, Sultanate of Oman.
2. Technical Manager, Renardet S. A. & Partners, P.O. Box 579, Code 113, Muscat, Sultanate of Oman; formerly, Professor, Public Works Dept., Faculty of Engineering, Cairo Univ., Cairo, Egypt.
3. Professor, Public Works Dept., Faculty of Engineering, Cairo Univ., Cairo, Egypt.