Injector (IMAGE) Penn State Caption Jason Moore, associate professor of mechanical engineering; David Pepley, a doctoral student studying mechanical engineering; and Yichun 'Leo' Tang, undergraduate student studying mechanical engineering, work with the needle simulator training device. Credit Erin Cassidy Hendrick Usage Restrictions non commercial use only 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.