MURFREESBORO — Aron Ralston, author of Between A Rock And A Hard Place, will be the keynote speaker opening MTSU’s 95th academic year at the University Convocation held on August 28th at 2 p.m. in Murphy Center. Ralston, gave up a career as a mechanical engineer and moved to Colorado, where among other things he attempted to climb the 59 Colorado peaks of more than 14,000 feet.