University of Rochester President Joel Seligman announced his resignation Thursday, just hours after the release of a report on sexual misconduct on campus.  The news came late Thursday afternoon, just as his silence on the Mary Jo White report was becoming conspicuous. That report, which examined the university's response to sexual misconduct allegations in the Brain and Cognitive Sciences department, largely approved the role Seligman and his cabinet played in the affair.  His decision to resign, though, was made before the White report came out.