ScienceNow: Purdue University officials today announced that they have completed a review on controversy swirling around Purdue nuclear engineer Rusi Taleyarkhan, the chief proponent of the contentious notion that sound waves can cause bubbles to collapse in a way that yields energy. Contrary to earlier statements by the university, officials now say they have no plans to make the review public or to reveal any potentially forthcoming disciplinary actions. “Specific recommendations of the examination committee and any subsequent steps by the university will be treated as confidential internal matters,” said Purdue University Vice President for Research Charles Rutledge in a statement.