Louisiana State University today reopened a portion of University Hospital, a facility in downtown New Orleans that was devastated 15 months ago by Hurricane Katrina. The hospital, which serves some of the city’s neediest people, is also a training ground for medical residents and students. Only 85 of its 575 beds will be available as the hospital reopened its emergency room, intensive-care unit, and a few medical and surgical beds. But the reopening is widely viewed as a turning point for a city that has suffered a shortage of emergency care for more than a year, according to The Times-Picayune, a local newspaper. The university’s other downtown teaching hospital, Charity Hospital, has been deemed a total loss.