Mun Choi, PhD, of Drexel University will discuss "New Observations of Droplet Combustion Behavior Under Microgravity Conditions" on Dec. 7, 11:30 a.m., Mechanical Engineering Center, Rm. 224. Contact: Edward Dreizin, 973-596-3327 or 973-596-5751; dreizin@njit.edu.