Hans van Leeuwen, Iowa State University (IMAGE) Iowa State University Caption Hans van Leeuwen is an Iowa State University professor and the R&D Magazine's 2009 Innovator of the Year. Credit By Bob Elbert/Iowa State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.