1. Assistant Professor, Dept. of Construction Engineering, School of Sciences and Engineering, American Univ. in Cairo, Egypt.
2. Professor and Graduate Program Director, Dept. of Construction Engineering, School of Sciences and Engineering, American Univ. in Cairo, Egypt.
3. Professor, Dept. of Construction Engineering, School of Sciences and Engineering, American Univ. in Cairo, Egypt.
4. Research Assistant, Dept. of Construction Engineering, School of Sciences and Engineering, American Univ. in Cairo, Egypt