Emrah Polat, a student advised by Professor Dr.Zeki Koday, completed his PhD thesis titled Human and Economic Geography of Ardahan Central District on 25.09.2019. He defended it against the jury consisting of Pof.Dr. Zeki Koday, Prof. Dr. Mete Alım, Prof. Dr. Mehmet Zaman, Assoc. Dr. Alperen Kayserili and Assoc. Dr. Vedat  Karadeniz  was unanimously successful by the jury and received the title of doctor.