Luna Lu (IMAGE) Purdue University Caption Purdue University professor Luna Lu holds the REBEL concrete strength sensing system, which her lab invented to improve estimates of in-place strength of concrete structures. As a beta product of Wavelogix, founded by Lu, the REBEL sensor technology is being tested in several states. Credit Purdue University photo/Greta Bell Usage Restrictions No restrictions. License Public Domain 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.