Howard Katz, Johns Hopkins University (IMAGE) Johns Hopkins University Caption In his Johns Hopkins materials science lab, Professor Howard E. Katz adjusts probes used for testing electronic devices. Credit Will Kirk/JHU 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.