Mechanical and aerospace engineering is starting off its Centennial Seminar Series with a lecture from Dr. Robert M. Wagner, director of the Fuels, Engines and Emissions Research Center at Oak Ridge National Laboratory. The seminar will be held at 3:30 p.m. Thursday, Sept. 1, in Room 140 Toomey Hall. His lecture is titled “Directions in High Efficiency Research and Future Fuel Opportunities.” This seminar is open to all students, faculty and staff who are interested.