David Gordon Wilson was Professor of Mechanical Engineering Emeritus at MIT. An acknowledged authority on human-powered transit and bicycle design-and the self-described ""father of modern recumbents""-he was also a prolific inventor and an early advocate for a ""carbon fee"" to encourage the use of renewable energy. Theodosios Korakianitis is Dean of the Parks College of Engineering, Aviation, and Technology; Professor of Aerospace and Mechanical Engineering; and Professor of Biomedical Engineering at Saint Louis University.