• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1109-1112
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• 2004

This study reports on the pressure relief design and braided composite of surge arrester. Surge arresters with porcelain housing must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit current. As a solution, this study describes pressure relief design performance of arresters with braided composite module. In general, braided composite has Potential for improved impact and delamination resistance. Manufacturing processes of the braided composite could also be automated and could potentially lead to lower costs. Therefore, in consideration of characteristics of pressure relief for polymer arrester, the fabric pattern of braided composite was decided. And Polymer arrester module was manufactured with braid. The mechanisms of pressure occurrence and relief were investigated basically by analyzing arc energy and the correlation between thermal shock and indoor pressure in pressure relief test.

• 한국중재학회지:중재연구
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• 제32권3호
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• pp.93-109
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• 2022

Cosmetics are products that consumers use every day to maintain or improve the health of their skin and hair. Therefore, the expansion of the cosmetics market leads to the expansion of disputes over cosmetic damage. Along with constant social changes, new conflicts continue to arise. In order to resolve these disputes, various consumer dispute resolution organizations and methods are required. Therefore, Alternative Dispute Resolution (ADR), an alternative method that can provide a reasonable judgment on problems that occur during the manufacture and distribution of cosmetics with expert knowledge of the industry, is required. Korea resolves disputes between consumers and manufacturers caused by cosmetics through the ADR of the Korea Cosmetics Association and the Korea Consumer Agency. It handles disputes related to accidents caused by cosmetics, offers consultation on consumer complaints on cosmetics and provides information on accidents and safety related to cosmetics. It is not possible to completely eradicate disputes from cosmetic damages. Therefore, it is necessary to expand and efficiently operate the cosmetic ADR system for consumers. In this study, the current status of cosmetic damage disputes and damage relief and the role of the domestic ADR system were reviewed. Consumers should be easily relieved from damage caused by cosmetics. By accumulating important precedents with an efficient cosmetic damage dispute resolution system, disputes over cosmetic damage should be smoothly resolved.

• KDI Journal of Economic Policy
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• 제33권4호
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• pp.119-142
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• 2011

본 연구는 풍수해보험사업이 도입 취지와는 달리 여러 문제점을 내포하고 있다는 문제의식하에 풍수해보험에 대한 개념적이고 이론적인 분석을 시도하였다. 우선 현재와 같이 재난지원금과 풍수해보험이 공존하는 상황은 풍수해보험 활성화에 장애로 작용할 것이므로, 풍수해보험을 확대하기 위해서는 재난지원금의 점차적 축소를 고려할 필요가 있다. 또한 풍수해보험의 기본취지 중 하나가 자율적 방재노력을 제고하는 것이나, 풍수해보험은 보험에 따른 도덕적 해이로 인해 오히려 그러한 노력을 저해할 가능성이 높다. 끝으로 현재의 손해방지비용 지원은 그 효과가 불확실하므로 보다 심도 있는 분석이 필요하다.

• 한국환경보건학회지
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• 제46권5호
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• pp.588-598
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• 2020

Objectives: Human indices were developed to determine returning point of residents and damage restoration after the chemical accident Methods: To determine the returning point of residents after the chemical accident, a new concept, the standard man model was introduced as a human index, in which both H-code and its acute effects were main idea. To evaluate the applicability, a hydrogen fluoride leakage accident in Gumi was applied. The returning point were suggested as the conservative remission period of acute effects among relevant hazard effects and compared with actual returning point. The coverage of each age group were considered with reflecting average daily dose expected for actual residents. In addition, a relief-index as a social-scientific approach was reflected as well to apply the damage restoration Results: Actual returning point of residents in Gumi was 88 days; and that of standard man model suggested was 84 days. The expected amount of exposure at aged 12 or under was at least 2.35 times greater than that of this model, 40s, theoretically. However, their population ratio was less than 1%, so 99% of residents could be applied when the standard man model was applied. The relief-index was as an objective and quantitative methodology to apply the qualitative aspect. Conclusions: Although evaluated as a relatively positive result, there was a limitation such as the number of accident applied to the verification of standard man model. The relief index was also considered, but further research should be carried out to find threshold level for the relief.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 춘계학술대회 논문집 유기절연재료 방전 플라즈마
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• pp.74-77
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• 2000

The main objective of this paper is to design and test a new type of polymer ZnO surge arrester for AC power system of railroad vehicles. Metal oxide surge arrester for most electric power system applications, electric train and must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit current. When breakdown of ZnO elements in a surge arrester occurs due to flashover, fault short current flows through the arrester and internal pressure of the arrester rises. The pressure rise can usually be limited by fitting a pressure relief diaphragm and transferring the arc from the inside to the outside of the housing. However, there is possibility of porcelain fragmentation caused by the thermal shock. pressure rise, etc. Non-fragmenting of the housing is the most desired way to prevent damage to other equipment. The pressure change which is occurred by flashover become discharge energy. This discharge energy raises to damage arrester housing and arrester housing is dispersed as small fragment. Therefore, the pressure relief design is requested to obstruct housing dispersion. The main research works are focused on the structure design by finite element method, pressure relief of module, and studies of performance of surge arrester for electric railway vehicle.

• Wind and Structures
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• 제22권1호
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• pp.89-106
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• 2016

With an aim to assess the wind damage to urban trees in more realistic conditions, the nonlinear dynamics of structured trees subjected to strong winds with different levels is investigated in the present paper. For the logical treatment of dynamical behavior of trees, material nonlinearities of green wood associated with tree biomechanics and geometric nonlinearity of tree configuration are included. Applying simulated fluctuating wind velocity to the numerical model, the dynamical behavior of the structured tree is explored. A comparative study against the linear dynamics analysis usually involved in the previous researches is carried out. The failure wind velocity of urban trees is then defined, whereby the failure percentages of the tree components are exposed. Numerical investigations reveal that the nonlinear dynamics analysis of urban trees results in a more accurate solution of wind-induced response than the classical linear dynamics analysis, where the nonlinear effect of the tree behavior gives rise to be strengthened as increasing of the levels of wind velocity, i.e., the amplitude of 10-min mean wind velocity. The study of relationship between the failure percentage and the failure wind velocity provides a new perspective towards the vulnerability assessment of urban trees likely to fail due to wind actions, which is potential to link with the practical engineering.

• 한국중재학회지:중재연구
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• 제32권4호
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• pp.3-31
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• 2022

In the past, there has not been a law with the main purpose of preventing or preventing a risk in advance in order to protect the safety of patients in relation to medical services. It is evaluated that the enactment of the Patient Safety Act has a very important meaning in protecting patient safety as the top priority and further improving the quality of medical care. However, looking at the status of patient safety accidents reported to the Patient Safety Reporting System after the Patient Safety Act was enacted and implemented, various types of risk factors for patient safety still exist in the medical field. Meanwhile, Korea Consumer Agency and Korea Medical Dispute Mediation and Arbitration Agency, the existing domestic ADR specialized agencies, have been operating reasonable damage relief procedures such as recommendation of settlement, mediation, and arbitration according to the purpose of their establishment. Therefore, with the aimof broadening the choice of compensation system for patients, we propose the establishment and revision of ADR-related laws to apply the damage relief procedures of both institutions.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.2038-2040
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• 2000

The main objective of this paper is to design and test a new type of polymer ZnO surge arrester for AC power system of railroad vehicles. Metal oxide surge arrester for most electric power system applications, electric train and subway are now being used extensively to protect overvoltage due to lightning. Surge arresters with porcelain housing must not have explosive breakage of the housing to minimize damage to other equipment when subjected to internal high short circuit current. When breakdown of ZnO elements in a surge arrester occurs due to flashover, fault short current flows through the arrestor and internal pressure of the arrester rises. The pressure rise can usually be limited by fitting a pressure relief diaphragm and transferring the arc from the inside to the outside of the housing. However, there is possibility of porcelain fragmentation caused by the thermal shock, pressure rise. etc. Non-fragmenting of the housing is the most desired way to prevent damage to other equipment. The pressure change which is occurred by flashover become discharge energy. This discharge energy raises to damage arrester housing and arrester housing is dispersed as small fragment. Therefore, the pressure relief design is requested to obstruct housing dispersion. The main research works are focused on the structure design by finite element method, pressure relief of module, and studies of performance of surge arrester for electric railway vehicle.

• 한국전자거래학회지
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• 제23권3호
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• pp.51-64
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• 2018

최근 들어 자연재해의 빈도 및 강도가 늘어나고 있으며, 이에 따른 피해 역시 늘어남에 따라, 재난 현장에 대한 대응이 점차 중요해지고 있다. 본 연구에서는 피해를 경감하기 위한 구호 물류에서 큰 비중을 차지하는 부분인 물류 거점의 위치와 규모를 선정하기 위한 연구를 수행하였다. 구호 물류에서의 거점은 물자의 비축을 수행하는 일반 물류 거점의 기능 외에도 이재민 수용, 부상자 응급 처치 등 다양한 기능을 겸비해야 하며, 거점의 위치를 선정하는 기준 역시 거리 외의 거점의 신뢰도 및 주변 환경의 위험성을 고려하여야 한다. 본 연구에서는 이를 위하여 IoT 센서를 이용하여 정보를 파악하기 위한 체계를 제안하였다. 또한 재난물류 거점문제는 다양한 수요에 대응하기 위한 기능의 배치에 대한 고려 역시 포함하여야 한다. 이를 풀이하기 위하여, 혼합정수계획 모델에 기반을 둔 알고리즘을 제시하였고, 재해 발생 시나리오를 고려한 시뮬레이션 실험을 통하여 모델의 성능을 검증하였다.

• 한국강구조학회 논문집
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• 제26권5호
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• pp.419-430
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• 2014

연구대상인 강바닥판교의 U-리브와 가로리브를 교차하는 접합부에 대한 연구는 지속적으로 이루어지고 있으나 아직까지는 현재 적용되고 있는 스캘럽 자체 또는 내부의 다이아프램 형상을 개발 이용하고 있는 정도이다. 근본적으로 문제가 되고 있는 교차부 U-리브 하단 부위의 피로손상을 줄이기 위해, 본 연구를 통하여 제시된 SRH, 즉, U-리브가 교차하는 가로리브의 적절한 위치에 적합한 크기의 원형의 구멍을 두는 방안에 대하여 검토하였다. 최종적으로 원형 SRH가 강바닥판교의 U-리브와 가로리브 교차부 응력집중을 충분히 완화시킬 수 있음을 확인하였고, 이 부위의 구조상세의 피로손상을 방지할 수 있는 방안 중 하나로 SRH를 제안할 수 있었다.