1. Assistant Professor, Bogazici Univ., Dept. of Civil Engineering, Bebek-Istanbul 34342, Turkey.
2. Professor, Univ. of California, Los Angeles, Civil & Environmental Engineering Dept., 5731E Boelter Hall, Los Angeles, CA 90095-1593 (corresponding author).
3. Research Engineer, Univ. of California, Los Angeles, Civil & Environmental Engineering Dept., 6679 Boelter Hall, Los Angeles, CA 90095-1593.
4. Senior Project Engineer, Kinemetrics Inc., 222 Vista Ave., Pasadena, CA 91107.
5. Associate Professor, Bogazici Univ., Dept. of Civil Engineering, Bebek-Istanbul 34342, Turkey.
6. Professor and Chair, Dept. of Earthquake Engineering, Bogazici Univ., Kandilli Observatory and Earthquake Research Institute, Cengelkoy-Istanbul 34688, Turkey.