Sia Nemat-Nasser, PhD, Distinguished Professor of Mechanics and Materials at the University of California-San Diego's Jacobs School of Engineering, will discuss "Managing Stress Waves over Multi-Frequencies by Micro-architectural Design of Materials" on April 18, 11:30 a.m.-1 p.m. in the Guttenberg Information Technologies Center, Room 3730.  The Elsevier Distinguished Lecture in Mechanics is sponsored by Elsevier and the NJIT Granular Science Laboratory.