1. Research Associate, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, 1111 Engineering Dr., Boulder, CO 80309 (corresponding author).
2. Assistant Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, UCB428, 1111 Engineering Dr., Boulder, CO 80309.
3. Director, Myers-Lawson School of Construction and Center for Innovation in Construction Safety and Health, Virginia Tech., and Bogle Professor of Industrial and Systems Engineering, 1345 Perry St., Blacksburg, VA 240611.
4. Graduate Research Assistant, Dept. of Civil, and Environmental Engineering, Virginia Tech., 1345 Perry St., Blacksburg, VA 24061.
5. NCSA Faculty Fellow and Assistant Professor, Dept. of Civil and Environmental Engineering; and Dept. of Computer Science, Univ. of Illinois at Urbana-Champaign, 205 N Mathews Ave., Urbana, IL 61801.