1. M.S. Student, Construction Engineering and Management, Charles Durham School of Architectural Engineering and Construction, Univ. of Nebraska–Lincoln, W113 Nebraska Hall, Lincoln, NE 68588.
2. Assistant Professor, Construction Engineering and Management, Charles Durham School of Architectural Engineering and Construction, Univ. of Nebraska–Lincoln, W113 Nebraska Hall, Lincoln, NE 68588 (corresponding author).
3. Associate Professor, Environmental, Agricultural, Occupational Health Science, 984388 Nebraska Medical Center, Omaha, NE 68198-4388; and Construction Engineering and Management, Charles Durham School of Architectural Engineering and Construction, W113 Nebraska Hall, College of Engineering, Univ. of Nebraska–Lincoln, NE 68588-0500.