1. Department of Civil Engineering, MSC 01 1070, University of New Mexico, Albuquerque, NM 87131-011
2. Department of Civil Engineering, MSC 01 1070, University of New Mexico, Albuquerque, NM 87131-011; Air Force Research Laboratory, Space Vehicles Directorate, AFRL/VSSV, Building 472, Albuquerque, NM 87117-5776; S-Systems Corporation, P.O. Box 9316, Albuquerque, NM 87119
3. S-Systems Corporation, P.O. Box 9316, Albuquerque, NM 87119