Postprint version. Published in Journal of Professional Issues in Engineering Education and Practice, Volume 131, Issue 1, January 1, 2005, pages 1-5.
NOTE: At the time of publication, the author Allen Estes was affiliated with the United States Military Academy - West Point, NY. Currently, August 2008, he is Head and Professor of Architectural Engineering at California Polytechnic State University - San Luis Obispo.
The definitive version is available at http://dx.doi.org/10.1061/(ASCE)1052-3928(2005)131:1(1).