April 23, 2015 - University of Delaware colleagues, friends and students of the late Dr. Norbert Mulders, professor of physics and astronomy, remember him as a dedicated and inspiring teacher, a brilliant experimental physicist and an open and witty companion. Dr. Mulders, a UD alumnus and member of the faculty since 1996, died from complications resulting from esophageal cancer on Monday, March 30. He was 55.