Nam Cao, Graz University of Technology (IMAGE) Graz University of Technology Caption Nam Cao is responsible for the hardware of the pollen sensor prototype. The PhD student is working on this topic as part of his DIssertation at the Institute of Technical Informatics at TU Graz. Credit © TU Graz - ITI 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.