Timothy Wei (IMAGE) Rensselaer Polytechnic Institute Caption Rensselaer Polytechnic Institute professor Timothy Wei has been using experimental flow measurement techniques to help American swimmers sharpen their strokes, shave seconds from their lap times and race toward a gold medal in Beijing. Credit Rensselaer Polytechnic Institute 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.