1. Associate Professor, Dept. of Civil Engineering, Univ. of Nebraska-Lincoln, N114 SEC-LINK, 844 N. 16th St., Lincoln, NE 68588-6105 (corresponding author).
2. Instructional Design Technology Coordinator, Innovative Instructional Design, Room 315, Brace Hall, College of Engineering, Univ. of Nebraska-Lincoln, Lincoln, NE 68588.