David R. Williams, University of Rochester (image) University of Rochester Share Print E-Mail Caption David R. Williams in his lab at the Center for Visual Science at the University of Rochester. Williams is the recipient of the 2015 Sigma Xi Procter Prize. Credit J. Adam Fenster/University of Rochester Usage Restrictions Please credit. Share Print E-Mail 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.