NCAA Division I-AA independent schools are four-year institutions whose football programs are not part of a football conference. This does not mean that I-AA independents schedule each other for competition like conference schools do. There are considerably less independent schools than in years past; many independent schools later join (or attempt to join) established conferences.
... inside the groove. (Compare with graphic below.) Since this friction force is essential for the device's operation, the groove must not be lubricated. Th ...