Prof. Dr. Jan Anton Koster (IMAGE) University of Groningen Caption This is Prof. Dr. Jan Anton Koster, Professor of Semiconductor Physics at the University of Groningen. Credit University of Groningen Usage Restrictions With credit 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.