A5110637968- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Carcinogens and Genotoxicity Assessment
- Radiation Effects and Dosimetry
- Radiopharmaceutical Chemistry and Applications
- Nuclear Materials and Properties
- Radioactivity and Radon Measurements
- Boron Compounds in Chemistry
- Radioactive contamination and transfer
- Fusion materials and technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Effects of Radiation Exposure
- Additive Manufacturing and 3D Printing Technologies
- Radioactive element chemistry and processing
- Advanced Algorithms and Applications
- Anatomy and Medical Technology
- Grey System Theory Applications
- Air Quality and Health Impacts
- Atomic and Subatomic Physics Research
- Nuclear and radioactivity studies
- Sperm and Testicular Function
- Reproductive Biology and Fertility
- Nuclear materials and radiation effects
Korean Academy of Science and Technology
2024
Dongnam Institute of Radiological & Medical Sciences
2021-2024
Pohang University of Science and Technology
2014-2023
Pohang Accelerator Laboratory
2019
Biological dosimetry is crucial for estimating the doses from biological samples and guiding medical interventions accidental radiation exposure. This study aimed to derive rapid precise dose estimates using a dicentric chromosome assay. To address challenges of manual scoring chromosomes, we upgraded an automatic system at enhancing precision detection while reducing need human intervention. We collected blood 30 individuals aged 20–67 years create dose-response curves aiming investigate...
The radioactivity concentration of environmental radionuclides was analyzed for soil and sand at eight locations within a radius 255 m centered on the Dongnam Institute Radiological & Medical Science (DIRAMS), Korea. average activity concentrations 40K, 137Cs, 226Ra, 232Th were 661.1 Bq/kg-dry, 0.9 21.9 11.1 respectively. 40K 137Cs lower than 3-year (2017–2019) reported by Korea Nuclear Safety, Due to nature granite-rich soil, 0.6-fold higher in other countries, while normal fluctuation...
Abstract The dicentric chromosome assay is the “gold standard” in biodosimetry for estimating radiation exposure. However, its large-scale deployment limited owing to time-consuming nature and requirement expert reviewers. Therefore, a recently developed automated system was evaluated assay. A previously constructed deep learning-based automatic dose-estimation (DLADES) used construct dose curves calculate estimated doses. Blood samples from two donors were exposed cobalt-60 gamma rays (0–4...
The adverse effects of radiation are proportional to the total dose and rate. We aimed investigate rate on different organs in mice. mice were subjected low (LDR, ~3.4 mGy/h) high (HDR, ~51 Gy/h) radiation. LDR caused severe tissue toxicity, as observed histological analysis testis. It adversely influenced sperm production, including count motility, induced greater abnormalities. expression markers early stage spermatogonial stem cells, such Plzf, c-Kit, Oct4, decreased significantly after...
The purpose of this study was to establish the dose-response curves for biological dosimetry Dong Nam Institute Radiological and Medical Sciences monitor radiation exposure local residents in vicinity nuclear power plant. blood samples five healthy volunteers were irradiated with gamma ray, each sample divided equally analysis chromosomal aberrations by Giemsa staining three-color fluorescence situ hybridization painting triplet (chromosomes #1, #2, #4). results followed Poisson distribution...
The activity of gamma-ray emitting nuclides is calculated assuming that each detected individually; thus, the magnitude coincidence summing signal must be considered during calculations. Here, correction factor for effect was calculated, and detection efficiencies two HPGe detectors were compared. CANBERRA Inc. GC4018 high-purity Ge detector provided an estimate peak-to-total ratio using a point source to determine factor. ORTEC GEM60 uses EFFTRAN in LVis obtain parameters model gamma-gamma...
Among the parameters influencing plasma arc cutting, current, cutting speed, and torch height act as main factors. them, plays an important role in improving kerf width cut quality, automatic control of is essential due to deformation workpiece during process. Therefore, according surface condition it required have so that gap between nozzle remains constant. The system this paper consists sensing, controller, prediction, stepper motor height. Here, rolling mode grey prediction algorithm...
Evaluating the radiation dose of target organs a laboratory mouse requires glass dosimeter to be surgically inserted at irradiated location. However, precisely inserting same location in different mice is rarely achieved, reducing reliability measured dose. To address this limitation, 3-D phantom was developed using computed tomography scanning and printing technology. The assessed four models: mouse, phantom, Monte Carlo N-Particle (MCNP) MCNP simulation. In all experiments, brain, heart,...
This study aims to develop a facility that can irradiate subjects with desired low dose, which be used assess the biological effects of low-dose radiation. We single-occupancy mouse-cage and shelf system adjustable geometric parameters, such as distances angles cages relative collimator. irradiation-level accuracy using two measurement methods. First, we calculate angle distance each mouse cage irradiator. employ Monte Carlo n-particle simulation for all at given from radiation source air...
Abstract Approximately 48 medical institutions in South Korea own and use blood irradiators; however, the quality control of irradiators is insufficient. This study was conducted to establish procedures for using an alanine dosimeter ensure reliability dosimetry. For dosimetry dosimeters, measurements were performed jig developed this dose delivery system reliability. Furthermore, distribution verified, uncertainty evaluated.