Anastasios Melas is a Chemical Engineer (Dipl. ChE - Aristotle University of Thessaloniki, 2009) and holds a PhD in experimental and numerical studies of soot aggregates dynamics and structure (Aristotle University of Thessaloniki, 2015). His research activities are related to light and heavy duty vehicles particle emissions measurement, ultrafine particles sampling/condition-ning/measurement devices development and evaluation, particle number measurements in the new periodical technical inspection, and aerosol dynamics simulation. Currently, he is a researcher at the Joint Research Centre (Ispra, Italy). He has been a member of the Hellenic Association for Aerosol Research since 2011. He is a member of HAAR Board.