1. Department of Civil, Construction, and Environmental Engineering, Iowa State University, 813 Bissell Road, Ames, Iowa 50011, United States
2. Department of Human Development and Family Studies, Iowa State University, 2222 Osborn Dr., Ames, Iowa 50011, United States
3. Department of Landscape Architecture and Urban Planning, Texas A&M University, 789 Ross Street, College Station, Texas 77843, United States