(Portland, OR)  --  Portland police are looking for a man who sexually assaulted a woman in the Woodstock neighborhood.  Authorities say the attack took place around 3:30 a.m. on New Year's Day in the area of Southeast 47th and Woodstock Boulevard.  The suspect is described as a white man in his 20s, with a thin build and "dark and greasy" short hair.  He was wearing "gas-attendant-style" jacket with a patch on the back that reads "Pork Army."