1. Fellow, ASCE
2. Member, ASCE
3. Grad. Res. Fellow, Massachusetts Inst. of Technol., Cambridge, MA 02139.
4. Prof. of Civ. and Envir. Engrg., Massachusetts Inst. of Technol., Cambridge, MA.
5. Assoc. Prof. of Civ. and Envir. Engrg., Massachusetts Inst. of Technol., Cambridge, MA.