1. P.E., Member, ASCE
2. Postdoctoral Res. Fellow, Engrg. Sci. and Applications Div., Engineering Analysis Group, Los Alamos Nat. Lab., Los Alamos, NM 87545.
3. PhD Student, Dept. of Civ. and Envir. Engrg., Massachusetts Inst. of Technol., Cambridge, MA 02139.
4. Mat. Behavior Team Leader, Engrg. Sci. and Applications Div., Engineering Analysis Group, Los Alamos Nat. Lab., Los Alamos, NM.