1. Assoc., Woodward-Lundgren & Assocs., Oakland, Calif.; and Asst. Research Engr., Univ. of California, Berkeley, Calif
2. Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif
3. Grad. Student, Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif