Researchers (IMAGE) University of Pittsburgh Caption Xu Liang, PhD, (right), professor of civil and environmental engineering at the University of Pittsburgh's Swanson School of Engineering, with doctoral candidate Daniel E. Luna. Credit University of Pittsburgh 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.