UD Professor Frank Schroeder has traveled to some of the most remote locations on the planet to set up radio antennas to detect cosmic rays, which are natureâs highest-energy particles. At right, he is shown in Siberia with a research team from Germany and Russia prior to his UD career. UD physicist named Sloan Research Fellow Article by Tracey Bryant Photos courtesy of Frank Schroeder | Photo illustration by David Barczak February 16, 2021 Frank Schroeder awarded prestigious fellowship Frank G. Schroeder, assistant professor of physics and astronomy at the University of Delaware, has received the Sloan Research Fellowship, one of the most competitive and prestigious awards available to researchers in the U.S. and Canada early in their careers.