Dr. Kennedy joined the Department of Mechanical and Aeronautical Engineering at the University of California Davis in 1986 after a period as a Research Staff member at Princeton University and several years at the Aeronautical Research Laboratories in Australia. He has developed a major aerosol research facility at the University of California Davis in which efforts are directed at varied problems related to ultrafine particle synthesis and applications in technology. Funding has been obtained from NSF, NASA, AFOSR, the California Air Resources Board, the Health Effects Institute (a consortium that includes the US EPA and the engine industry) and NIEHS. The research in his laboratory includes studies of nanoscale particulate emissions from combustion systems, including engines. A major thrust of Dr. Kennedy's efforts is directed towards understanding the impact of ultrafine aerosol particles on human health. This interest is pursued via extensive multidisciplinary collaborations with colleagues in Environmental Toxicology, Land Air Water Resources, Veterinary Medicine, Chemistry and Civil and Environment Engineering. He is also involved in applying nanoscale particles to detection technologies in biology and biophotonics e.g., using nanoscale phosphors as labels of biomolecules. This work involves collaborative research with colleagues in the Departments of Entomology, Internal Medicine and Land Air Water Resources.