Dr. Siti Nurasiah Mat Nawi is a Postdoctoral Research Fellow at the Department of Physics, Faculty of Science, Universiti Malaya. She obtained her PhD in Medical Science from Sunway University under a fully funded scholarship, following her MSc in Experimental Physics (Radiation Science) and BSc in Physics from Universiti Malaya. Her research focuses on radiation dosimetry, thermoluminescence materials, radiation detection, and advanced functional materials for medical and environmental applications. She has published more than 58 ISI-indexed papers, with over 500 citations and an H-index of 15. She has received national and international research awards and actively collaborates with academic, healthcare, government, and industry partners. Her research interests include thermoluminescence dosimetry, graphite-based dosimeters, retrospective dosimetry, radiation-induced defects, and material characterization.