1. Post Graduate Researcher, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697-2175.
2. Professor, Dept. of Signal Theory and Communications, Technical Univ. of Catalonia, Barcelona, Spain.
3. Assistant Professor, Dept. of Electrical and Computer Engineering, Univ. of California, Irvine, CA 92697-2175.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697-2175.