Ghasempour Lab (IMAGE) Princeton University, Engineering School Caption Graduate student Atsutse Kludze, right, and postdoc Subhajit Karmakar work in Yasaman Ghasempour's Princeton lab to develop a wireless technology that can effectively peek beneath the surface of the fruit's skin to take ripeness measurements that indicate its quality. The researchers believe it is the first smart food technology to make use of the high-frequency sub-terahertz band of wireless signals. Credit Sameer A. Khan/Fotobuddy Usage Restrictions non-commercial use; use with credit License Original 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.