Richard Hogg, PhD, professor emeritus of Mineral Processing and GeoEnvironmental Engineering at Penn State University, will discuss "Mixing and Segregation of Powders" at the Spring 2010 Granular and Multiphase Flows Colloquium Series on April 5, 11:30 a.m.-1 p.m. in the Mechanical Engineering Center Room 224. For further information, contact Dr. A. Rosato, MIE Dept (rosato@njit.edu; 973-596-5829).