1. Research Engineer, Dept. of Architecture, Univ. of Washington, 208 Gould Hall Box 355720 Seattle, WA 98195-5720.
2. Associate Professor, Dept. of Architecture, Univ. of Washington, 208 Gould Hall Box 355720 Seattle, WA 98195-5720 (corresponding author).
3. Zuckerman Postdoctoral Fellow, Dept. of Industrial Engineering and Management, Technion-Israel Institute of Technology, Haifa, 32000, Israel.