US Naval Postgraduate School (NPS) completes study of sleep patterns aboard 'USS Jason Dunham' (DDG 109). The study was conducted by personnel from the Naval Postgraduate School (NPS) who came aboard Jason Dunham to interview crewmembers about their watch rotations and monitor their sleep patterns, activity periods and reaction times. Dr. Nita Shattuck, an associate professor with the NPS Operations Research Department, said Jason Dunham's crew were the perfect candidates for the study.