• 한국항해항만학회지
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• 제28권2호
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• pp.113-119
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• 2004

Ships' collision accident has often occurred in congested waterways or in harbour areas. To examine the cause of collision accident may be necessary to prevention against another similar one. We discuss the construction of ship-manoeuvring-simulator system used for reproducing ships' collision phenomenon The system consists of one simulator bridge for own ship and two control consoles for own ship and target ship. Own ship and target ship are linked each other, and are simultaneously manoeuvred in simulator bridge or at control console respectively. And a simulator experiment for reproducing ships' collision phenomenon and for examining the cause of accident is carried out. Through the present case study, we find out that the constructed simulator system is very useful for reproducing ships' collision phenomenon and for examining the cause of accident.

• Nuclear Engineering and Technology
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• 제55권10호
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• pp.3787-3800
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• 2023

Reactivity Initiated Accident (RIA) scenarios require special attention using advanced simulation techniques due to their complexity and importance for nuclear power plant (NPP) safety. While the conservative approach has traditionally been used for safety analysis, it may lead to unrealistic results which calls for the use of best estimate plus uncertainty (BEPU) approach, especially with the current advances in computational power which makes the BEPU analysis feasible. In this work an Uncontrolled Control Element Assembly (CEA) Withdrawal at Full Power accident scenario is analyzed using the BEPU approach by loosely coupling the thermal hydraulics best-estimate system code (RELAP5/SCDAPSIM/MOD3.4) to the statistical analysis software (DAKOTA) using a Python interface. Results from the BEPU analysis indicate that a realistic treatment of the accident scenario yields a larger safety margin and is therefore encouraged for accident analysis as it may enable more economic and flexible operation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.312-314
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• 2001

Whenever the accidents occur in the rail way areas, their prompt recovery is very important. The individual way has been used to resolve these accident by direct visiting the site and reporting to others of the person who cares for these cases. As a result, we are planing to operate the MTS (Multimedia Transmission System) for a timely information's transmission to the related peoples in the central control center by transforming the picture information on the accident-site to the digital information.

• Nuclear Engineering and Technology
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• 제46권2호
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• pp.207-216
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• 2014

This paper revisits the Fukushima accident to draw lessons in the aspect of nuclear safety considering the fact that the Fukushima accident resulted in core damage for three nuclear power plants simultaneously and that there is a high possibility of a failure of the integrity of reactor vessel and primary containment vessel. A brief review on the accident progression at Fukushima nuclear power plants is discussed to highlight the nature and characteristic of the event. As the severe accident management measures at the Fukushima Daiich nuclear power plants seem to be not fully effective, limitations of current severe accident management strategy are discussed to identify the areas for the potential improvements including core cooling strategy, containment venting, hydrogen control, depressurization of primary system, and proper indication of event progression. The gap between the Fukushima accident event progression and current understanding of severe accident phenomenology including the core damage, reactor vessel failure, containment failure, and hydrogen explosion are discussed. Adequacy of current safety goals are also discussed in view of the socio-economic impact of the Fukushima accident. As a conclusion, it is suggested that an investigation on a coherent integrated safety principle for the severe accident and development of innovative mitigation features is necessary for robust and resilient nuclear power system.

• 성인간호학회지
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• 제12권3호
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• pp.334-344
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• 2000

The purpose of this research was to examine the effect of support group intervention on the various adaptations of primary family caregivers caring for Cerebro- Vascular Accident patients. The nonequivalent control group pretest-posttest design within the framework of Lazarus & Folkman's stress-adaptation model was used for this experimental study. The subjects were 86 primary family caregivers caring for Cerebro- Vascular Accident patients at K hospital in Taegu, D herbal hospital in Kyung Ju, H hospital in Pohang from March, 1998 to July, 1998. Among 86 subjects, 43 were placed in an experimental group and 43 in a control group. The experimental group was treated by researcher who administered informational and emotional support group intervention once a week over a five weeks period. The data were collected through interviews. Collected data was analized by means of a chi-square test, t-test, ANCOVA, and Pearson correlation coefficient. The results of this research were as follows: 1. Physical, emotional, and social adaptation scores in the experimental group were revealed to be significantly higher than those of the control group. 2. There was significant positive correlation among physical health, subjective burden, depression and objective burden. Accordingly, it is concluded that informational and emotional support group intervention was a useful nursing intervention on the various adaptations of primary family caregivers caring for Cerebro-Vascular Accident patients.

• 대한교통학회지
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• 제27권4호
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• pp.41-53
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• 2009

2003년 1월부터 2008년 6월까지 5년 6개월 동안 대전지역에서 발생한 교통사고와 같은 기간 경찰에서 단속한 통계를 근거로 통계적으로 의미가 있다고 판단된 전체분석, 중앙선침범 분석, 신호위반 분석, 음주운전 분석, 무면허운전 분석, 이륜차 분석, 보행자 분석, 교통사망자 분석 및 교통안전시설 분석, 안전홍보 및 교육 분석, 차량등록 수와 교통사고와의 관계를 SPSS12.0 통계프로그램을 이용하여 분석을 시도한 결과, 의미 있는 결과들이 산출되었다. 교통단속과 교통사고가 일정한 상관관계가 있음이 증명되어 모형이 산출되었고, 교통단속의 효과는 일정한 시간적 간격을 가지고 나타났다. 교통단속과 교통사망자와의 관계는 상관계수가 너무 낮아 통계적으로 유의하지 않은 것으로 나타나 경찰의 단속이 교통사망사고 예방에는 거의 효과가 없는 것으로 분석되었다. 이는 지금까지 추진되어온 교통안전대책의 방향전환이 시급함을 나타내는 것이어서 보다 효과적인 대안수립이 필요하다고 할 수 있다.

• 한국위험물학회지
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• 제2권1호
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• pp.31-37
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• 2014

Since the unprecedented hydrogen fluoride leak accident in 2012, there has been growing demand for customized technical information for rapid response and chemical accident management agencies including the Ministry of Environment, the National Emergency Management Agency, and the National Police Agency need more information on chemicals and accident management. In this regard, this study aims to provide reliable technical data and guidelines to initial response agencies, similar to accident management technical reports of the US and Canada. In this study, we conducted a questionnaire survey and interviews on initial response agencies like fire stations, police stations, and local governments to identify new information items for appropriate initial response and improvements of current guidelines. We also collected and reviewed the Canada's TIPS, US EPA's hydrogen fluoride documents, domestic and foreign literature on applicability tests of control chemicals, and interview data, and then produced items to be listed in the technical guidelines. In addition, to establish database of on-site technical information, we carried out applicability tests for accident control data including ① emergency shut down devide, safety guard, shut down valve, ground connection, dyke, transfer pipe, scrubber, and sensor; ② literature and field survey on distribution type and transportation/storage characteristics (container identification, valve, ground connection, etc.); ③ classification and identification of storage/transportation facilities and emergency management methodslike leak prevention, chemicals control, and cutoff or bypass of rain drainage; ④ domestic/foreign analysis methods and environmental standards including portable detection methods, test standards, and exposure limits; and ⑤ comparison/evaluation of neutralization efficiency of control chemicals on toxic substances.

• 한국항공운항학회지
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• 제16권1호
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• pp.18-28
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• 2008

The purpose of this study is leading to prevent the major causes of commercial-aviation fatalities about controlled-flight-into-terrain(CFIT) in approach-and-landing accidents. The paper of major analysis for controlled flight into terrain(CFIT) was Guam accident, Mokpo accident and Gimhae accident in commercial transport-aircraft accidents from 1993 through 2002. CFIT occurs when an airworthy aircraft under the control of the flight crew is flown unintentionally into terrain, obstacles or water, usually with no prior awareness by the crew. This type of accident can occur during most phases of flight, but CFIT is more common during the approach-and-landing phase. Ninety-five percent of the Guam accident, Mokpo accident, and Gimhae accident where weather was known involved IMC, fog, and rain. The paper believed that prevention for CFIT accident was education and training for flying crew and upgrade for equipment such as EGPWS, and need more research for professional organizations of airlines, and accomplishing precision approaches should be a high priority.

• 한국정보전자통신기술학회논문지
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• 제12권3호
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• pp.282-289
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• 2019

반사형 및 태양광 LED 도로 표지병은 도로 환경에 대한 시인성 확보 방법 중 하나로 사용되고 있다. 도로 표지병은 반사형 과 태양광 LED의 개별 제품으로는 범용성, 효율성, 간편성 및 시인성에 대한 장, 단점이 존재 하나 해당 부분 이외에 사고 후 2차 사고 방지 및 기타 교통 시스템과의 연계를 통한 확장성을 가지기 어렵다는 공통적인 단점을 가지고 있다. 본 논문은 기존 태양광 LED 도로 표지병에 RF 방식의 통신을 사용한 무선 제어 기능을 내장한 도로 표지병과 이를 제어하는 시스템에 대해 제안하였다. 제안된 시스템을 스마트 도로 표지병 시스템이라 하였으며 기존 태양광 LED 도로 표지병에 RF 방식의 통신 기능을 내장하여 중앙 통제실과 연계된 중앙제어장치 및 중계기를 통하여 해당 기기를 제어 할 수 있다. 또한 도로 상태에 따라 점등 방법, 색상 등의 제어가 가능하기 때문에 도로의 상태를 운전자에게 제공하여 사고 후 2차사고 방지에 대한 기능을 수행할 수 있다. 또한 LED 및 RF통신의 지속적인 전력 소모량을 최소화 하는 기능을 추가 하였다. 제안된 시스템의 유효성을 검증하기 위해 시작품을 제작 하였으며 기존의 시인성 확보를 통한 사고 방지 기능 외에 기타 교통 시스템과의 연계에 의한 사고 후 2차사고 방지 기능에 대학 역할이 가능함을 확인 하였다.

• 한국응급구조학회지
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• 제4권1호
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• pp.95-100
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• 2000

This is a study to evaluate the effects of the safety of ambulance driving and traffic accidents and to provide statistic information for the various factors to reduce the ambulance traffic accidents. The major instruments of this study were Korean Self-Analysis Driver Opinionnaire. This Questionnaire contains 8 items which measure drivers' opinions or attitudes: driving courtesy, emotion, traffic law, speed, vehicle condition, the use of drugs, high-risk behavior, human factors. The total of 145 divers were investigated ambulance drivers in Taejon City and others(6 City) from 2000. 5. July to 2000. 11. July. The data were analyzed by the path analysis - with SPSS and AMOS package program. The result are as follows : 1. It have suggested that risk factors of ambulance traffic accident much affected with emotion and speed control on safety ambulance driving(Y(Accident) = $0.88{\times}1$(Emotion Control) + $0.92{\times}2$(Speed) - $0.46{\times}3$(Traffic Law)+E). 2. It have suggested that risk factors of ambulance traffic accident much affected with emotion and speed control on safety ambulance driving(Y(Accident) = $0.398{\times}1$(Emotion Control) + $0.500{\times}2$(Speed) - $0.263{\times}3$(Traffic Law)+E) by coefficiecial structural analysis.