(Portland, OR)  --  A professor at Linfield College in Portland is slated to appear today as a contestant on the popular game show "Jeopardy."  Chuck Dunn is a math professor who's taught at Linfield for 14 years, and says he's been a Jeopardy fan for a long time.  Dunn took an online test and was invited in July to participate on the show following an interview.  The episode was taped in August.