1. Graduate Research Assistant, Dept. Civil and Environmental Engineering and Geodetic Science, The Ohio State Univ., 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210.
2. Graduate Research Assistant, School of National Resources, The Ohio State Univ., 2021 Coffey Rd., Columbus, OH 43210.
3. Associate Professor, Dept. Civil and Environmental Engineering and Geodetic Science, The Ohio State Univ., Columbus, 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210.
4. Director, Sierra Nevada Research Institute, Univ. of California, P.O. Box 2039, Merced, CA 95344.
5. Associate Professor, Dept. Civil and Environmental Engineering and Geodetic Science, The Ohio State Univ., 470 Hitchcock Hall, 2070 Neil Ave., Columbus, OH 43210.