1. Associate Professor, University of Colorado Boulder, Department of Civil, Environmental, and Architectural Engineering, UCB 428, Boulder, CO 80309, USA, Telephone: +1 303-492-0470, Telefax: +1 303-492-7317, E-mail: john.mccartney@colorado.edu
2. Assistant Professor, The University of Texas at Austin, Department of Civil, Architectural and Environmental Engineering, 301 E. Dean Keeton St. Stop C1792, Austin, TX 78712-1174, USA, Telephone: +1 512-471-4921, Telefax: +1 512-471-0592, E-mail: cox@mail.utexas.edu