Sreyvich SIENG is a doctoral student at Kanazawa University, Japan, supported by a MEXT scholarship within the framework of the JICA-JST SATREPS project. She previously served as a staff member at the Institute of Technology of Cambodia. She holds a Master's degree in Chemical Engineering (2019) from Universitas Gadjah Mada, Indonesia. Her current research focuses on the chemical characterization of atmospheric ultrafine particulate matter (PM0.1) to understand seasonal variations and source apportionment in Cambodia.