Pei Zhong, Duke University (IMAGE) Duke University Caption This is a photo of Pei Zhong, the Anderson-Rupp Professor of Mechanical Engineering and Materials Science at Duke University, with a modern lithotripsy machine. Credit Duke 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.