Pusat Pengajian Sains Fizik - Tesis
Browse
Recent Submissions
Now showing 1 - 5 of 607
- PublicationRadiation Shielding Parameters For Composite Particleboard Added Baso4 And Bi2o3 At Orthovoltage Energy Range(2025-07)Abdullah, Siti Nor AzizahWood-based composites have gained attention as potential radiation shielding materials due to their lightweight nature, adaptability for property enhancement, and versatility across various applications. This research studies a new metal added composite particleboard as a lead equivalent material for radiation shielding.
- PublicationFabrication And Characterization Of Sb Doped Tio2 Nanoparticle Synthesized By Laser Assisted Chemical Bath Deposition On Porous Silicon For Uv Photodetection(2025-07)Yusuf, ShehuThe effects of antimony (Sb)-doping concentration into titanium dioxide (TiO2) material, whereby the doping films deposited utilizing laser-assisted chemical bath deposition (LACBD) technique on porous silicon (PSi) substrates-based ultraviolet photodetectors (UV PDs), have been studied for the first time in this work. The obtained results revealed that the Sb doping concentrations significantly affected the morphological, topographical, structural, optical, and photodetection properties.
- PublicationEu/Mg-Doped Sodium Silica-Borate Glasses From Recycled Soda-Lime-Silica Glass For Low-Dose Radiation Dosimetry(2025-07)Ezra, Nabasu SethThis study synthesised a radiation dosimeter with soda-lime-silica (SLS) glass, which is typically thrown in landfills, where it takes a long time to break down. Using this glass waste helped prevent the build-up of glass waste. Additionally, this reduces the need for pure SiO2. Two sets of glasses were synthesised by melt-quenching, the conventional method, doped and co-doped with Eu2O3 and MgSO4 respectively with compositions (Eu2O3)x (Na2O)0.1 (B2O3)0.6 (SLS)0.3-x and (Eu2O3)0.01 (Na2O)0.1 (B2O3)0.6 (SLS)0.29-y (MgSO4)y where x = y = 0, 0.005, 0.01, 0.03, and 0.05 mol%.
- PublicationDevelopment Of A Monte Carlo-Based Treatment Planning System For Personalized Dosimetry In Yttrium-90 Hepatic Radioembolization(2025-07)Abdul Hadi, Muhammad Fahmi RizalYttrium-90 (90Y) hepatic radioembolization is a targeted therapy for liver cancer that depends on accurate dosimetry for both treatment efficacy and safety. Conventional dose estimation using the Partition Model (PM) often overlooks patient-specific anatomy and radiation crossfire effects, leading to potential inaccuracies. This study presents a cross-platform treatment planning system (TPS) integrating Monte Carlo (MC) simulations to improve personalised dosimetric evaluation. Pre-treatment CT and 99mTc-MAA SPECT images from patients at University of Malaya Medical Centre were segmented using 3D Slicer to define volumes of interest (VOIs), including lungs, normal liver, and tumour.
- PublicationPengumpulan Dan Penganalisaan Data Sinaran Suria Menggunakan Komputer(1996)Lubis, SaharaKebanyakan pengukuran sinaran suria kini dijalankan secara manual, yang melibatkan banyak kerja yang rumit, sehingga perlu dijalankan dengan bantuan komputer selaras dengan zaman teknologi komputer yang sedang berkembang dengan pesat. Kajian ini bertujuan untuk memudahkan kerja-kerja pengumpulan dan pemprosesan data sinaran suria keseluruhan yang seterusnya digunakan untuk mencadangkan suatu persamaan yang bersesuaian untuk negeri pulau pinang. Suatu sistem pengubah analog ke digital yang cekap dikenali sebagai sistem pci-20000 digunakan untuk mengukur data sinaran suria dan data kaji iklim melalui pyranometer model kipp & zonen. Isyaratisyarat input analog dari pyranometer dihantar kepada sistem peralatan pci-20000 yang berhubungan terus dengan komputer peribadi