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Now showing items 901-920 of 2309636

Beyond the curve: a machine learning approach for wobbling proton beam therapy output prediction

Chung Kwangzoo (The Korean Physical Society, 2026-08)

While analytical models for monitor unit prediction in wobbling proton beam therapy are well-established, they exhibit reduced accuracy in clinically extreme cases, such as large field sizes or seldom-used plan parameters. ...
Beam profile monitor for PAL-XFEL

Kim Gyujin; Oh Bongi; Yang Haeryong; Kang Heung-Sik; Ko In Soo; Kim Changbum; Kim Chul Hoon (The Korean Physical Society, 2026-08)

Abeam profile monitor has been developed for precise measurement of the electron beam size at the X-ray free-electron laser (XFEL). Given the XFEL’s high beam energy, accurate alignment of optical transition radiation (OTR) ...
Design of a proton beamline specialized for radiation testing of semiconductors at KOMAC

Kim Han Sung; Lee Seung-Hyun; Yun Sang-Pil; Kim Dong-Hwan; Kwon Hyeok Jung (The Korean Physical Society, 2026-08)

The demand for radiation hardness testing of semiconductor devices has been rapidly increasing, particularly for space and high-reliability applications. To address this need, a dedicated proton beamline for semiconductor ...
Test of full-performance operation (80 MW, 4 $$\upmu $$s, 60 Hz) of the latest S-band klystron at PAL

Park S. J.; Min C. K.; Park Y. G.; Jang S. D.; Jang G. Y.; Shin H. S. (The Korean Physical Society, 2026-08)

We report high-voltage (HV) and RF processing results of the latest domestically manufactured S-band pulse klystrons developed for the Pohang Accelerator Laboratory (PAL). Previous prototypes of the 80 MW-class tube suffered ...
Microwave instability study in a high-current electron storage ring

Fan Weijie; Li Ji; Wang Yanxu; Feng Chao; Zhang Qinglei; Zhou Demin (The Korean Physical Society, 2026-08)

In modern storage rings, microwave instability frequently represents a critical performance-limiting factor. A storage ring based coherent light source (SRCLS) generally requires high average current to generate coherent ...
Experimental performance evaluation of prototype single-spoke resonator superconducting RF cavities

Kim Heetae; Jeon Sungmin; Kim Juwan (The Korean Physical Society, 2026-08)

The RF performance of prototype single-spoke resonator (SSR) superconducting radio-frequency cavities has been system atically evaluated to characterize their accelerating and mechanical properties. Vertical cryogenic tests ...
Multi-objective regionalized Bayesian optimization of MeV-ultrafast electron diffraction facility

Jung Minseo; Chung Moses; Min Chang-Ki (The Korean Physical Society, 2026-08)

Ultrafast Electron Diffraction (UED) is an imaging method to study the structure of matter and its dynamics by scattering of a pulsed electron bunch. Its performance depends on electron beam parameters such as beam size ...
Beam dynamics studies for SDTL-based 200 MeV energy upgrade of KOMAC proton linac

Lee Seunghyun; Moon Seok-Ho; Park Sungbin; Kim Han-Sung; Kwon Hyeok Jung (The Korean Physical Society, 2026-08)

The Korea Multi-purpose Accelerator Complex (KOMAC) is proposing an energy upgrade for the existing 100 MeV pro ton linear accelerator (linac). The design for this extended linac is based on a normal-conducting separated-drift ...
Operational validation of a replacement IGBT for the high voltage converter modulator in a proton accelerator at KAERI

Jeong hae seong (The Korean Physical Society, 2026-08)

A replacement Insulated Gate Bipolar Transistor (IGBT) for the High Voltage Converter Modulator (HVCM) used in the KAERI 100-MeV proton linear accelerator was evaluated following the discontinuation of the original device. ...
Operation status of KOMAC Linac

Kwon Hyeok Jung; Kim Han Sung; Song Young-Gi; Yun Sang-Pil; KIM KYUNGHYUN; Jeong hae seong; Lee Seunghyun (The Korean Physical Society, 2026-08)

A 100-MeV proton linear accelerator (linac) which has been operating since 2013 at Korea Multi-purpose Accelerator Complex (KOMAC) started 24-h beam service in 2024 and neutron beam service in 2025. In addition to the ...
Stabilization of beam quality and increase in lifetime of thyratron System for PAL-XFEL

Kim Sang-Hee; Min Chang-Ki; Heo Hoon; Lee Jaeyu (The Korean Physical Society, 2026-08)

PAL-XFEL uses 51 klystron modulators as high-voltage pulse-switching devices to accelerate electron beams to 10 GeV. The output stability of the modulator is a key factor in stably accelerating the electron beam. Thyratrons ...
텍스트 제시 양식, 지문 종류 및 질문 유형에 따른 초등학생 어휘발달지연 아동과 일반 아동의 판별력 분석

KIM SHIN YOUNG; Dongsun Yim (Korean Speech- Language & Hearing Association(KSHA), 2026-07)

목적: 본 연구는 초등학교 1~6학년 아동들을 대상으로 텍스트 이해 능력을 검토하고, 텍스트 과제 조건 중 일반 아동과 어휘발달지연 아동을 가장 효과적으로 판별하는 조건이 무엇인지 검토하고자 하였다. 방법: 본 연구에는 초등학생 355명이 참여하였으며, 비언어성 지능검사 점수 결측 사례를 제외한 312명(일반 아동 285명, 어휘발달지연 아동 27명)을 최종 분석 대상으로 하였다. 연구 대상 ...
‘-으로만’, ‘-만으로’ 교체 양상과 제약 요인

Lee,JunHee (한말연구학회, 2026-08)

This study examines the alternation between the Korean particle sequences ‘-euroman’ and ‘-maneuro’ and explains the factors that license or constrain their distribution. Although Korean particles generally occur in a ...
‘하오체’의 변화 양상 - 20세기 중반에서 후반까지 영화 대사를 중심으로 -

Lee, Jung tag (한말연구학회, 2026-08)

‘hao’ style is regarded as one of the Korean main addressee honorification now. This style was made in modern times. In this times this style was one of the most active styles. But it is very clear that this style lost ...
초등 정보교육에서의 컴퓨팅 사고력 다차원적 평가 준거 탐색: 델파이 조사를 중심으로

Yerin Hong; Lee YoungSeok (산학협력단 부설 지능소프트웨어교육연구소, 2026-08)

초등 정보교육에서 컴퓨팅 사고력의 중요성이 확대되고 있으나, 기존 평가는 지필 검사나 산출물 점수 중심의 단일 평가로 이루어져 학생의 사고 과정, 태도, 수행, 학습 경험을 종합적으로 설명하는 데 한계가 있다. 본 연구는 초등 정보교육 맥락에서 컴퓨팅 사고력을 다차원적으로 평가하기 위한 평가 준거를 도출하고 그 타당성을 검증하는 데 목적이 있다. 문헌 분석을 바탕으로 인지적 측면, 정의적·성향적 ...
사회·산업적 문제 해결을 위한 디자인 씽킹 2P 확장 모델 기반 초등 AI 융합 교육 프로그램 개발 및 적용

Dagyeom Lee; Yi Soyul (산학협력단 부설 지능소프트웨어교육연구소, 2026-08)

인공지능(AI) 기술이 초래하는 사회·산업적 변화에 대응하기 위해 초등학생 단계부터 실제적 문제를 다루는 AI 융합 교육이 요구된다. 이에 본 연구는 가상 창업을 주제로 한 디자인 씽킹 2P 확장 모델을 초등학생의 발달 단계에 맞게 재구조화한 12차시의 AI 융합 교육 프로그램을 개발 및 적용하였다. 디지털 새싹 캠프에 참여한 초등학교 6학년 학생 21명을 대상으로 적용하여 디지털 역량과 ...
Modeling U(VI) sorption on bentonite under thermal and geochemical conditions relevant to high-level radioactive waste repositories

HWANG JEONG HWAN; Weon Shik Han; Won Woo Yoon; Ji-Yong Lee; Jung-Woo Kim (Korean Nuclear Society, 2026-08)

Ensuring the long-term safety of high-level radioactive waste repositories requires reliable buffer materials. Bentonite, primarily composed of montmorillonite, is widely used due to its high sorption capacity for ...
Post-closure safety assessment of the Anarak repository site using AMBER code; the bath-tubbing scenario analysis

Zare Ganjaroodi Saeed; Fani Maryam; Maleki Farsani Ali (Korean Nuclear Society, 2026-08)

Post-closure safety assessment of radioactive waste (RW) disposal aims to ensure that a repository remains protective of human health and the environment over long timescales. Following an eight-year site selection and ...
Numerical analysis of aerosol pool scrubbing mechanisms in rising bubbles using a coupled VOF–DPM framework

Liang Hui; Li Yun; Chen Yuqi; Ma Qianchao; Yu Hongxing; Lv Huanwen; Tian Chao; Duan Riqiang; Ding Ming; Sun Zhongning (Korean Nuclear Society, 2026-08)

During severe nuclear reactor accidents, radioactive aerosols released from degraded fuel can be transported into engineered safety systems such as suppression pools and filtered containment venting systems (FCVS), where ...
Fault diagnosis of control systems in small pressurized water reactors based on CNN–LSTM hybrid network

Wan Jiashuang; Sun Qikun; Wu Shifa (Korean Nuclear Society, 2026-08)

Small Modular Pressurized Water Reactors (SMPWRs) are characterized by complex configurations and compact layouts. Operating under dynamic conditions, these systems are highly susceptible to both single and concurrent ...

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