A man who admitted kidnapping a woman and sexually assaulting her inside a Fairleigh Dickinson dorm room last year was sentenced Friday to 15 years in state prison, authorities said. On April 9, 2023, Jayshawn E. Moore, 22, of Jersey City, forced the woman into the room, threatened her and then physically and sexually assaulted her over the course of several hours while armed with a knife, the Morris County Prosecutor’s Office said in a statement. Moore is not affiliated with the university and the woman he assaulted was known to him, the office said. Moore was arrested two days later and char…