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피로손상된 제진합금의 감쇠능에 미치는 피로 응력의 영향
이명수,이예나,남기우,강창룡,Lee, Myeong-Soo,Lee, Ye-Na,Nam, Ki-Woo,Kang, Chang-Yong 한국재료학회 2018 한국재료학회지 Vol.28 No.10
This study investigates the effect of fatigue stress on the damping capacity in a damaged Fe-22Mn-12Cr-3Ni-2Si-4Co damping alloy under fatigue stress. ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ forms by fatigue stress in the damaged Fe-22Mn-12Cr-3Ni-2Si4-Co damping alloy under fatigue stress. The ${\alpha}^{\prime}$ and ${\varepsilon}-martensite$ forms with the specific direction and surface relief, or they cross each other. With an increasing fatigue stress, the volume fraction of ${\alpha}^{\prime}-martensite$ and ${\varepsilon}-martensite$ increases. With an increasing fatigue stress, the damping capacity increases with an increase in the volume fraction of ${\varepsilon}-martensite$. The increase in the damping capacity in the damaged Fe-22Mn-12Cr-3Ni-2Si-4Co alloy under fatigue stress strongly affects the increase of ${\varepsilon}-martensite$ formed by fatigue stress, but the damping capacity of the damaged Fe-22Mn-12Cr-3Ni-2Si-4Co damping alloy under fatigue stress is strongly controlled by a large amount of ${\alpha}^{\prime}-martensite$.
이명수 ( Myeong Soo Lee ),김혜경 ( Hye Kyung Kim ),김혜정 ( Hye Jung Kim ),박기원 ( Ki Won Park ),문성록 ( Sun Rock Moon ) 한국의류산업학회 2003 한국의류산업학회지 Vol.5 No.3
The study investigated the effect of multi-functional fabric on the autonomic nervous function and psychological variables of 20 students. The experimental group exhibited lower values in anxiety, depression, fatigue and stress level and higher emotional level. This study reveals that multi-functional fabrics reduced the low frequency/high frequency power ratio of heart rate variability. These results support the multi-functional fabrics increases cardiac parasympathetic tone. In addition, experimental group were found to have lower heart rate compared with controls. This augmented heart rate in experiment provides support for stablizing autonomic nervous system. In conclusion, multi-functional fabrics may stabilize the autonomic nervous system and psychological symptoms.
원자력 교육원 #2 시뮬레이터 성능개선에 관한 연구(Ⅰ)
이명수(Myeong-Soo Lee),유현주(Hyun-Joo Yoo),박신열(Shin-Yeol Park),홍진혁(Jin-Hyuk Hong) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
원자력교육원 #2(KNPEC-2) 시뮬레이터는 1980년도 중반에 웨스팅하우스에 의해 공급되어 계속 사용되어 오다가 현재 성능개선 연구가 진행 중이다.<br/> 이번 성능개선을 통해 기존의 컴퓨터 시스템 (Gould MPX)와 소프트웨어의 전면 교체가 이루어지고 있으며 최적 계산코드를 이용한 실시간 열수력 모델 (ARTS; Advanced Real-Time Thermal-Hydraulics Simulation) 개발, 2-Group 3D 실시간 노심모델 (REMARK, Real Time Multigroup Advanced Reactor Kinetics)를 이용한 노심 주기개선 (Cycle Update), 가상현실 기술 등을 이용한 컴퓨터 교육지원 시스템 (CATS: Computer Assister Training System) 둥 새로운 시도가 이루 어지고 있으며 본 논문은 이러한 새로운 시도를 및<br/> 그 결과에 대해 기술하고 있다.<br/> 기준발전소 (Reference Plant) 인 영광 1 호기 12 주기의 노성모델로 주기개선 (Cycle Update) 을 위한 REMARK 의 입력자료 생성을 위해 핵설계 전산 체계인 APA (ALPHA-PHOENIX -ANC) 시스템 의 출력으로부터 자동으로 REMARK 입력데이타를 생성하기 위한 GUI 툴 개발하였다 .<br/> 또 이를 이용하여 개발된 노심 모델은 최적계산코드 (RETRAN 3D)의 열수력 해법을 이용하여 개발 된 NSSS 열수력코드 (ARTS) 와 결합 OntegratlOn) 되어 안정 및 과도 상태 시험에 사용되었으며, 원 자로 냉각재 펌프 정지등의 몇 가지 과도 시험 계산결과 기존 해석 결과와 잘 일치하였다<br/> 중앙제어실 (MCR ; Main Control Room) 내의 운 전원 행동만 훈련하도록 되어있는 기존 시뮬레이터의 한계를 극복하기 위해 가상현실 (VR) 저작도구를 이용한 발전소 현장 내부를 표현하는 가상발전<br/> 소 (Virtual Plant), 발전소 현장에 소재하여 기존 시뮬레이터의 모의한계 밖에 있던 패널을 표현한 가상판넬 (Virtual Panel 등과 강의실에서 발전소 모의 훈련을 가능케하기 위해 가상현실 기술을 이용한 컴퓨터 지원 교육훈련 시스템 (CATS: Computer Assister Training System) 을 개발 중이며 일부 개발부분을 소개하였다.
통계적 공정 관리(SPC)와 엔지니어링 공정 관리(EPC)의 비교 조사: 통합 방안을 중심으로
이명수 ( Myeong Soo Lee ),김광재 ( Kwang Jae Kim ) 한국품질경영학회 2005 품질경영학회지 Vol.33 No.1
With the common objective to improve process productivity and product quality, statistical process control (SPC) and engineering process control (EPC) have been widely used in the discrete-parts industry and the process industry, respectively. The major focus of SPC is on process monitoring, while that of EPC is on process adjustment. The emergence of the hybrid industry necessitates a synergistic combination of the two methods for an effective process control. This paper investigates the existing studies on SPC, EPC, and the integration of the two methods. This paper also presents future research issues in this field.
특수기능성섬유가 성장기 운동선수의 수면 중 성장호르몬 분비에 미치는 영향
이명수 ( Myeong Soo Lee ),이진희 ( Jin Hee Lee ),고경찬 ( Kyung Chan Koh ),문성록 ( Sun Rock Moon ) 한국의류산업학회 2003 한국의류산업학회지 Vol.5 No.1
The purpose of this study was to investigate the effect of multi-functional fabric on EEG and growth hormone (GH) during sleep and quality of sleep with the 9 young female athletes. The subjects participated in separated experimental procedure; sleeping in multi-functional fabric wear (experimental group) and cotton wear (control group) for 450min. During the night (22:00-05:30), we recorded the changes of nocturnal polysomnographic sleep recording and GH were measured every 60min. The results show that there are significant differences in percentage of stage 1, 2 and slow wave sleep (SWS) between two groups(S1, p<.05;S2, SWS, p<.01). The SWS percentage of experimental group is 1.89 times higher than control group. The changes of GH secretion varied depending on two experimental procedures. The peak of GH secretion in experimental group is more than controls by 2.4time (p<.001). The quality of sleep in experimetal group is significantly higher than control (p<.01). These results suggest muti-functional fabric wear is effective in inducing the deep sleep and increasing GH and quality of sleep.
500MW급 표준화력발전소 시뮬레이터 모델을 이용한 디지털 제어시스템 검증
서정관,이명수,홍진혁,Suh, Jeong-Kwan,Lee, Myeong-Soo,Hong, Jin-Hyuk 한국시뮬레이션학회 2010 한국시뮬레이션학회 논문지 Vol.19 No.3
The simulator models for 500MW fossil power plant have been developed, and interconnected with the turbine control system to test and validate the digital instrumentation & control (I&C) systems before they are implemented in operating power plants. When the performance of a selected digital I&C system is tested, the corresponding simulator model is replaced by the plant digital I&C systems which is considered as a non-tunable system. The input/out variables of simulator models and control systems were mapped using the LabView in interface systems. This paper describes the interconnection method between the simulator model and the digital I&C system, and summarizes the validation test results performed at the condition of steady-state operation, normal evolution, and malfunction. The integrated validation method of digital I&C systems using the simulator models showed that the simulator can be used as a test bed for the implementation of digital I&C systems in power plants.
CARE 지침에 따른 대한한방소아과학회지의 증례보고에 대한 질평가
이혜림,김지환,이명수,이주아,Lee, Hye Lim,Kim, Ji Hwan,Lee, Myeong Soo,Lee, Ju Ah 대한한방소아과학회 2018 대한한방소아과학회지 Vol.32 No.3
Objectives The purpose of this study is to assess the quality of case reports from the Journal of Pediatrics of Korean Medicine. Methods Case reports were selected from the Journal of Pediatrics of Korean Medicine from January 2015 to April 2018, by utilizing Oriental Medicine Advanced Searching Integrated System (OASIS). The quality of the reports were reviewed based on the Consensus-based Clinical Case Reporting Guideline Development (CARE) guideline. Results Total of 13 case reports were finally selected for the assessment. 73.08% of the case reports included necessary information based on the CARE guideline but the rest of the reports did not. More than 50% of the reports were missing data regarding 'Timeline', 'Diagnostic challenges', 'Intervention adherence and tolerability', 'Adverse and unanticipated events', or 'Patient perspective or experience'. Also, the reports did not include 'Key word', 'Introduction in abstract', 'Case presentation in abstract', or 'The rationale for conclusions' information. Conclusions Case reports from the Journal of Pediatrics of Korean Medicine have important role in pediatrics. Efforts are needed to improve the quality of the case reports as well as to develop reporting guidelines for the Journal of Pediatrics of Korean Medicine.