Dartmouth Human Light Sensing Study (IMAGE) Dartmouth College Caption Xia Zhou, an assistant professor of computer science at Dartmouth College, and her colleagues have significantly improved their innovative light-sensing system that tracks a person's behavior continuously and unobtrusively in real time. Credit Dartmouth College Usage Restrictions Credit Dartmouth College 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.