Professor Teik C. Lim of the University of Cincinnati gave a seminar Tuesday, April 22, on the modeling, analysis and control of high-speed gear dynamics. Lim explained that gear dynamics is one of the most critical factors affecting the noise, vibration and durability performances of gearbox, drivetrain and power transmission systems. The dynamics of a gear pair is essential to today's automobile NVH (noise, vibration, and harshness) performance that drives this product's competitiveness, so gaining a better understanding of the underlying physics is crucial in the design and development of quieter and more durable geared rotor systems. Professor Lim has been on the Mechanical Engineering factulty at the University of Cincinnati since 2002, and is currently the Department Head. His research interest is in power transmission systems, structural dynamics, vibro-acoustics, sound quality and active control.