Coskun Bayrak, PhD Professor and Chairperson Biography: Dr. Coskun Bayrak is currently chairperson and professor of computer science and information systems at youngtown state university (ysu. Prior to joining ysu, he was a professor and program director of graduate programs (ms and phd) at the university of arkansas – little rock (august 2000-july 2017); associate professor in computer science at troy state university (1997-2000); assistant professor in computer science at benedict college, colombia, sc, and lecturer at the university of Texas at Dallas.