1. Assistant Professor, School of Construction Management Technology, Polytechnic Institute, Purdue Univ., 401 Grant St., West Lafayette, IN 47097 (corresponding author).
2. Professor and Chair, School of Building Construction, College of Design, Georgia Institute of Technology, 280 Ferst Dr., Atlanta, GA 30332-0680.
3. Principal Researcher, Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki Prefecture 305-0053, Japan.