Dear Colleagues, This week marks the start of another academic year. This is always a period of rejuvenation on any campus when new students and faculty members arrive - all bringing new energy to the academic enterprise. This Fall semester is a special one for us as we celebrate our School's Centennial on campus during October 7-8. I wish all a great 2011-12 academic year! Best, Arvind Arvind Varma R. Games Slayter Distinguished Professor Head, School of Chemical Engineering Purdue University