1. Barry Faculty Fellow and Assistant Professor, Univ. of Colorado at Boulder, Dept. of Civil, Environmental, and Architectural Engineering, 428 UCB, Boulder, CO 80309. E-mail: john.mccartney@colorado.edu
2. Associate Professor, Univ. of Texas at Austin, 1 University Station C1792, Austin, TX 78712.
3. Faculty Associate, Univ. of North Carolina at Charlotte Dept. of Engineering Technology, The William States Lee College of Engineering, 9201 University City Blvd, Smith 244 Charlotte, NC 28223-0001. E-mail: rswan1@uncc.edu