• 한국안전학회지
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• 제29권4호
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• pp.199-207
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• 2014

In this paper, to systematically assess the abandonment risk of main control room (MCR) fire, fire simulations with Fire Dynamics Simulator were performed and abandonment probabilities were estimated for the MCR bench-board fire of domestic reference nuclear power plant. The fire simulation scenarios performed in this study included propagating and non-propagating fires of the MCR bench-board, and the availability and unavailability of heating, ventilation, and air conditioning system (HVACS). The following results were obtained. First, temperature was the major abandonment impact factor for the MCR bench-board fire if the HVACS was available and optical density was that if the HVACS was unavailable. Second, the fire scenario contributing the MCR bench-board fire abandonment risk was identified to be only the propagating fire. Third, it was confirmed that the abandonment probability of the MCR bench-board fire for domestic reference nuclear power plant could be reduced by using the fire modeling.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 전력전자학술대회 논문집
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• pp.124-127
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• 2001

가상현실 기술을 이용한 컴퓨터 지원 교육훈련 시스템 (VR-CATS: Virtual Reality based Computer Assisted Training System) 개발에 대한 연구를 전력연구원에서는 계속 수행해 왔다. 본 논문에서는 New VR-CATS (울진 3호기 참조)중 가상현실에서의 공동 협동 훈련 시스템(Virtual Reality Collaboration Training System)의 설계에 관하여 서술한다. 공동작업은 발전소 MCR(Main Control Room)을 3D 데이터 모델링 후 가상현실화하고 MCR 내부를 Navigation 할 수 있도록 가상패널(Virtual Panel)을 개발 및 에에 대한 엔지니어링 데이터베이스환경을 작성하여 추후 정확하고 신속한 계기 정보를 얻을 수 있도록 하며 훈련생들이 시뮬레이터실로 가지 않고 MCR에서 발전소를 운전하는 것과 같은 효과를 강의실에서 얻을 수 있다. 또한 설계기준사고 중의 하나인 LOCA 사고 복구 훈련 시나리오를 통하여 실제와 동일한 복구 훈련을 하므로서 효율적이며 현장감있는 교육훈련 수행을 가능케 한다.

• 동의생리병리학회지
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• 제17권4호
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• pp.905-913
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• 2003

Oriental medicine explains aging as the weakening of Kidney-ai, and Kidney-strengthening herbal medicines such as Yukmijihwang-tang have been studied for anti-aging effects. In Western Medicine, the hypothesis that reactive oxidant species(ROS) contribute to the aging process is generally accepted. It has been reported that Moutan Cortex Radicis extract (MCR) was the most effective constituent of Yukmijihwang-tang in decreasing ROS production in oxidative-stressed cells. The purpose of this study is to confirm the anti-oxidant effect of MCR on PC12 cells, the expression of Heme oxygenase (HO), Macrophage migradon inhibitory factor (MIF), Catechol-O-methyltransferase (COMT) using real time RT PCR. PC12 cells were treated without or with hydrogen peroxide in the presence or absence of MCR using MTS assay. Hydrogen peroxide decreased the viability of PC12 cells by 53% and MCR did not influence that of stressed PC 12 cells irrespective of dose or incubation period. However, MCR showed an inhibitory effect on production of ROS in stressed cells, both dose and incubation time dependently. In particular, 1 ㎎/㎖ of MCR for 24 h culture almost returned to normal level. In the quantiation of anti-aging related gene expression, MCR at 1 ㎎/㎖ increased the expression of HO by 370%, MIF by 180% and COMT by 280% through real time RT PCR. In conclusion, MCR treatment protected PC12 cells from hydrogen peroxide and decreased ROS production and enhanced anti-oxidative gene expression such as HO, COMT and MIF, which suggests that MCR is involved in controlling anti-aging of nerve cells through elimination of cytotoxic stimuli.

• 한국통신학회논문지
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• 제27권4C호
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• pp.308-315
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• 2002

Guaranteed frame rate (GFR) 서비스는 ATM 망에서 인터넷 트래픽을 전송하는 가상 연결에게 예약된 minimum cell rate (MCR)을 보장하고, 여분의 대역폭을 가상 연결들에게 공평하게 배분하기 위해 정의되었다. ATM 망에서 GFR 서비스를 제공하기 위한 가장 간단한 스위치 구현 방법은 frame-based generic cell rate algorithm (F-GCRA) 프레임 분류기와 FIFO 버퍼를 위한 early packet discard (EPD) 기법의 버퍼 허용 알고리즘으로 이루어진다. 이 구현 방법은 간단하지만, 상대적으로 큰 MCR을 예약한 가상 연결에게 예약한 만큼의 대역폭을 보장 할 수 없었다. 본 논문은 TCP 트래픽에 패킷 스페이싱 기법을 적용하여 burstness을 완화시켜서 가상 연결에게 더 큰 MCR을 보장하도록 한다. 또한, 버퍼 허용 알고리즘에 random early detection (RED) 기법을 적용하여 여분의 대역폭 사용에 있어서 공평성을 향상시킨다. 모의 실험을 통해 두 기법이 TCP 트래픽에 대한 GFR 서비스의 QoS를 향상시킴을 보였다.

• 한국정보통신학회논문지
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• 제24권2호
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• pp.244-251
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• 2020

본 논문에서는 UML 다이어그램의 정보를 구문적으로 분석하여 클래스들의 정보를 구조적으로 구축하는 정보 저장소인 '메타 클래스 레포지토리 (MCR)'의 구현 방법을 제시한다. 구문적으로 분석된 클래스의 정보를 구조적으로 구축하기 위하여 수퍼 클래스인 '메타 클래스 (meta-class)'를 정의하고, 이들 메타 클래스들의 컬렉션으로 구성된 레포지토리를 구축하여 정보를 관리한다. 또한, MCR이 보유하고 있는 메타 클래스 정보에 기반하여 클래스에 상응하는 코드를 생성하기 위하여 '코드 생성 엔진 (CGE)'을 설계하여 제시한다. 코드 생성 엔진의 로직을 구성함에 있어서는 클래스에 대한 정보와 프로그래밍 언어의 구문 규칙이 합법적으로 조합되어 코드가 생성되어야 한다. 따라서, 이러한 클래스 다이어그램으로부터 코드를 생성하는 데에 MCR과 CGE가 통합적으로 협력하여 수행될 수 있도록 구현하는 방법을 제시한다. CGR의 동작 메커니즘에 대한 알고리즘을 유한 상태 머신 형태로 제시함으로써 CGE의 로직을 형식화하여 표현함과 동시에 구현 상의 용이함을 취할 수 있게 하였다.

• 대한본초학회지
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• 제29권4호
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• pp.1-8
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• 2014

Objectives : The root bark of Morus alba L. (Mori Cortex Radidus; MCR) has been traditionally used to reduce heat from the lungs, soothe asthma, and edema and to promote urination. In this study, we investigated the effect of MCR ethanol extract on ovalbumin (OVA)-induced allergic asthma in mice. Methods : Mice were sensitized at day 0, 7 and 14 with 0.2% OVA and then airway challenged at day 21, 23, 25, 27 and 29 to induce allergic asthma. MCR extracts at doses of 50 and 100 mg/kg body weight (bw) were orally administered during OVA challenge once per a day. The levels of allergic mediators such as histamine, OVA-specific IgE, IFN-${\gamma}$ and IL-4 were measured in the sera of mice by ELISA. The histopathological change of lung tissues was observed with hematoxylin and eosin (H&E) staining. Results : MCR extract significantly decreased not only the serum levels of histamine, OVA-specific IgE, and IL-4 compared with those of OVA control group, but significantly increased the serum level of IFN-${\gamma}$. In H&E staining, MCR extract inhibited the infiltration of inflammatory cells and bronchiolar damage with epithelial thickening in lung tissues of OVA-induced asthma mice. Conclusions : These results indicate that MCR extract inhibits lung damage by asthma through regulating the allergic immune response, suggesting that MCR may be used as a useful agent for the treatment of allergic asthma.

• Korean Journal of Acupuncture
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• 제26권1호
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• pp.85-109
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• 2009

Objective & Methods : The present study was to investigate the effect of Moutan Cortex Radicis Herbal-acupuncture (MCR-HA) at GB34 (Yangleungchean) on hyperlipidemia and arteriosclerosis induced by high fat diet in rats. Results : 1. Moutan Cortex Radicis herbal-acupuncture infusion solution (MCR-HAS) increased DPPH radical scavenging activity and HMG-CoA reductase inhibition rate in rat liver cells. 2. MCR-HA at GB34 decreased serum total cholesterol level, and increased serum phospholipid/total cholesterol in rats with high fat diet. 3. MCR-HA at GB34 decreased atherogenic index in rats with high fat diet. 4. MCR-HA at GB34 increased hepatic catalase activity in rats with high fat diet. Conclusion : These results suggested that Moutan Cortex Radicis herbal-acupuncture at GB34 has therapeutic effects on hyperlipidemia and related complications in rats with high fat diet.

• 산업공학
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• 제17권spc호
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• pp.37-45
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• 2004

Human factors engineering design guidelines for main control rooms(MCR) in nuclear power plants(NPP) have been applied to optimize human-machine interface(HMI) between operators and their equipment on the basis of physical, physiological and cognitive aspects. However, the HMI design for MCR is not found to be sufficient to maximize operators' performance since the operators in the MCR experience excessive stress due to the environmental factors such as inappropriate interiors and illumination. Therefore, well-designed environment of the MCR may be equally important to improve human performance in the MCR. The objectives of the study are two-fold: (1) to propose an interior design of SHIN-KORI 1 2 for pleasant and comfortable working environments, and (2) to design indirect lighting system to enhance visibility and productivity. The human factors engineering checklists were developed to examine whether or not the proposed human-environment design for SHIN-KORI 1 2 satisfies the regulations and guidelines presented by NUREG-0700 Revision 1. The implications of the human-environment design are discussed in detail.

• 한국실내디자인학회논문집
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• 제16권5호
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• pp.81-88
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• 2007

Energy consumption has been increased world widely, and the energy retain is one of the most important economic alternatives. These tendencies expand the nuclear power plants not only quantitatively but also qualitatively. Despite of the increasing construction of nuclear power plants and related facilities, every system in main control room(MCR) has been designed and administered solely based on the safety-first principles because of the specificity of nuclear industry. However, recent main control rooms started with the concept that the operators' performance could be optimized though the organic interrelation between human, machine, and environments. Now, it has been recognised in the scope of Ergonomics and Space Design which acknowledge our living spaces as Man-Environment Interface and this change connotes the MCR spaces should be special spaces rather than ordinary spaces. This research investigated domestic and foreign nuclear power plants' MCRs to suggest basic alternatives which can be applied to future MCR. With the review of characteristics of MCR, an integration of interior design, lighting and Ergonomics was explored and classified as types. Futhermore, the classification of environmental characteristics within the relationships between human, machine, and environments was developed through the case analysis of nuclear power plants. The results of this study will provide a basis of space design for system environments that the high level of safety and function are extremely important.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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• pp.664-667
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• 2004

In nuclear power plant, the main control room(MCR) plays a leading and important role, so it is the core to have its design well operater-centered, both physically and cognitively. This paper especially analyzes focusing on lighting MCR environment and shows alternatives. It will lead to improve work efficiency and to care operator's sight. In conclusion, reducing operator's stress, fatigue and increasing safety, comfort.