1. Head, Central Lab., Ministry of Public Works and Housing, Dubai, United Arab Emirates.
2. Assoc. Prof., Civ. Engrg. Dept., United Arab Emirates Univ., P.O. Box 17555, Alain, United Arab Emirates.
3. Emeritus Prof., Mech. Engrg. Dept., Univ. of Sheffield, Mappin St., Sheffield, S1 3JD, U.K.