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Modelling and Validation of a 6 MV Compact Linear Accelerator via Monte Carlo Simulation using Geant4 Application for Tomographic Emission (GATE).
Biomed Phys Eng Express
January 2025
Mindanao Radiation Physics Center, MSU-Iligan Institute of Technology, Andres Bonifacio Street Tibanga, Iligan City, Lanao Norte, 9200, PHILIPPINES.
To accurately model and validate the 6 MV Elekta Compactlinear accelerator using the Geant4 Application for Tomographic Emission (GATE). In particular, this study focuses on the precise calibration and validation of critical parameters, including jaw collimator positioning, electron source nominal energy, flattening filter geometry, and electron source spot size, which are often not provided in technical documentation. Methods: Simulation of the Elekta Compact6 MV linear accelerator was performed using the Geant4 Application for Tomographic Emission (GATE) v.
View Article and Find Full Text PDFTwo-Step Reshaping of Acicular Gold Nanoparticles.
Nano Lett
January 2025
Institut Charles Sadron, Université de Strasbourg and CNRS, 67034 Strasbourg, France.
Anisometric plasmonic nanoparticles find applications in various fields, from photocatalysis to biosensing. However, exposure to heat or to specific chemical environments can induce their reshaping, leading to loss of function. Understanding this process is therefore relevant both for the fundamental understanding of such nano-objects and for their practical applications.
View Article and Find Full Text PDFResearch on the influence of loading rate on the dynamic initiation fracture toughness of CMDB propellant.
Sci Rep
December 2024
School of Mechanical Engineering, Key Laboratory of Special Engine Technology, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
In the field of gun launched missile extended range rocket, the propellant grain in the rocket needs to withstand significant launch loads during their firing phase, and also bear the high pressure caused by ignition, and the impact of launch overloads and ignition shocks on the structural integrity of propellants becomes very important. So this work investigated the dynamic initiation fracture toughness of the composite modified double-base (CMDB) propellant by both experiments and numerical simulations. The dynamic mechanical properties test of the cracked straight through flattened Brazilian disc (CSTFBD) specimens were conducted using a modified Split Hopkinson pressure bar (SHPB).
View Article and Find Full Text PDFFlattened red nucleus in progressive supranuclear palsy detected by quantitative susceptibility mapping.
Parkinsonism Relat Disord
December 2024
Department of Neurology, Fujita Health University School of Medicine, Toyoake, Japan. Electronic address:
Introduction: Progressive supranuclear palsy (PSP) involves midbrain structures, including the red nucleus (RN), an iron-rich region that appears as a high-contrast area on quantitative susceptibility mapping (QSM). RN may serve as a promising biomarker for differentiating parkinsonism. However, RN deformation in PSP remains elusive.
View Article and Find Full Text PDFDamage analysis and optimal design of micro-structure milling cutter based on peridynamics.
PLoS One
December 2024
School of Mechanical Engineering, Guizhou University, Guiyang, China.
H13 die steel has the characteristics of high hardness, strong toughness, and good heat resistance, and is a typical difficult to process materials material. During the cutting process, it is prone to accelerate tool wear and cause thermal deformation. By reasonably designing micro-grooves, the comprehensive performance of the tool can be effectively improved.
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