RALEIGH, N.C. --When John Cornwell graduated from Duke University last year, he landed a job as software engineer in Atlanta but soon found himself longing for his college lifestyle. So the engineering graduate built himself a reminder of life on campus: a refrigerator that can toss a can of beer to his couch with the click of a remote control. "I conceived it right after I got out," said Cornwell, a May 2006 graduate from Huntington, N.Y. "I missed the college scene. It embodies the college spirit that I didn't want to let go of."