David Y. H. Pui (Course Director) is a Regents Professor and LM Fingerson/TSI Inc Chair in Mechanical Engineering at the University of Minnesota. He is a member of the National Academy of Engineering (NAE) and Director of the Particle Technology Laboratory at the University of Minnesota. He is also the director of the Center for Filtration Research (CFR) with 20 leading international filtration companies as members. He has a broad range of research experience in aerosol and nanoparticle science and filtration technology, and has over 300 published journal papers and 40 patents. He has developed several widely used commercial aerosol instruments. Dr. Pui has received many awards, including the Max Planck Research Award (1993), the Humboldt Research Award for Senior US Scientists (2000), the Fuchs Memorial Award (2010)—the highest disciplinary award conferred jointly by the American, German, and Japanese Aerosol Associations—and the Einstein Professorship Award (2013) by the Chinese Academy of Sciences (CAS).