David Y. H. Pui is a Regents Professor and LM Fingerson/TSI Inc. Chair in Mechanical Engineering at the University of Minnesota.  He is also a Presidential Chair Professor at The Chinese University of Hong Kong, Shenzhen, and a Chair Professor at the Xi’an Jiaotong University.  Dr. Pui is a Member of the U.S. National Academy of Engineering (NAE) and the Director of the world-renowned Particle Technology Laboratory at the University of Minnesota.  He is also the Director of the Center for Filtration Research (CFR) consisting of 20 leading international filtration manufacturers and end users.  Dr. Pui has a broad range of research experience in aerosol and nanoparticle engineering and filtration technology and has over 320 journal papers and 40 patents.  He has developed several widely used commercial aerosol instruments for PM2.5 measurements. His recent interest involves developing green technologies for mitigating vehicle emissions, and for urban air cleaning using the Solar Assisted Large Scale Cleaning System (SALSCS).  Dr. Pui has received many awards, including the Max Planck Research Award (1993), the Humboldt Research Award for Senior U.S. Scientists (2000), the Fuchs Memorial Award (2010) -- the highest disciplinary award conferred jointly by the American, German and Japanese Aerosol Associations.  He served as President of the American Association for Aerosol Research (2000-2001), and President of the International Aerosol Research Assembly (2006-2010) consisting of 16 member associations from around the world.