1. Postdoctoral Researcher, Los Angeles County Museum of Arts, Los Angeles, CA 90036; formerly, Graduate Student Researcher, Dept. of Structural Engineering, International Institute of Earthquake Engineering and Seismology (IIEES), P.O. Box 3913/19395, Tehran, Iran.
2. Professor, International Institute of Earthquake Engineering and Seismology (IIEES), P.O. Box 3913-19395, Tehran, Iran.
3. Postdoctoral Researcher, Dept. of Civil and Environmental Engineering, UCLA, Los Angeles, CA 90095-1593.
4. Professor, Dept. of Civil and Environmental Engineering, UCLA, Los Angeles, CA 90095-1593 (corresponding author).