1. Engineering Practice Academy, Swinburne University of Technology, Mail H38, P.O. Box 218, Hawthorn 3122, Victoria, Australia e-mail:
2. Humanities, Arts, and Social Sciences Division, Colorado School of Mines, Stratton Hall, Room 420, Golden, CO 80401 e-mail:
3. School of Engineering Education, Purdue University, 701 W. Stadium Ave, West Lafayette, IN 47907 e-mail: