• Aerospace Engineering and Technology
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• v.4 no.2
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• pp.163-170
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• 2005

According to the KSLV program of KARI, it is planed to develop various launch vehicle and satellite 10 years hereafter. Large-scale test facilities, such as ReTF and PTA-II, are needed to fulfill this launch vehicle/satellite development project. The authors intend to arrange and describe various indexes that are needed in test facility design, construction and operation process. This technical paper is describing model analysis of damage prediction of accident in KSLV Integrated Propulsion System Test Facility based on propellant storage quantity and layout. In addition, the result can be used to produce safer design of test facility.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.31 no.3 s.52
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• pp.245-251
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• 2005

Safety is one of the key issue in the regulation of cosmetics. Cosmetic Act deals with it in Korea. The guidance for the testing cosmetic ingredients and their safety evaluation are prepared by Korea Food and Drug Administration. Ultraviolet radiation could Induce skin damage, edema, erythema, photoaging, immune dysfunction and skin cancer. Ultraviolet radiation is classified as Group 2A(probably carcinogenic to humans) by International Agenry for Reaserch on Cancer(IARC). The in vitro methodologies for evaluating the toxic potential of ingredients reported in the literature have not yet been sufficiently validated for use in areas other than the study for mutagenicity/genotoxicity, for pre-screening for severe irritancy, for screening of phototoxicity and for evaluating the percutaneous absorption. The 3T3 neutral red uptake photoxicity test (3T3 NRU PT) was accepted as OECD toxicity guideline in 2002. The 3T3 NRU PT is an in vitro method based on a comparison of the cytotoxicitv of a chemical when tested in the presence and in the absence of exposure to a non-cytotoxic dose of UVA/visible light.

• Journal of Food Hygiene and Safety
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• v.6 no.3
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• pp.171-177
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• 1991

According to the Established Regulations of National Institute of Safety Research, the skin-irritation test of BST-SR (Lucky Ltd.) was perfonned for seven days in New Zealand White Rabbits. During treatment periods no significant clinical symptom was observed. Significant changes such as erythema, scar tissue and edema were not shown on the applicating sites. According to Primary Irritation Index of Draize, skin irritation rate was assessed as "Zero". The eye irritation of BST-SR (Lucky Ltd.) was examined in nine New Zealand White rabbits, based on the Established Regulation of National Institute of Safety Research. 0.1 ml of test material was dropped on right eye, and after 20~30 seconds, three rabbits' eyes were cleaned with wann saline for 1 minute. Other six rabbits' eyes were left uncleaned. The untreated left eyes were negative control. The lesions of cornea, iris and conjuntiva were assessed by the Grade table (from the Regulation of National Institute of Safety Research), and it is concluded that BST-SR has no eye-irritation.

• Agrochemical news magazine
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• v.22 no.1 s.164
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• pp.46-47
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• 2001

• Journal of the Korean Society for Railway
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• v.15 no.3
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• pp.266-271
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• 2012

This study was carried out for the purpose of improving driving safety and comfort of the railways quickly becoming popular. To conducted gas pressure welding to ensure the strength safety of continuous welded rail and rotating bending test tensile test was conducted. The element to determine the tensile strength of gas pressure welds at experiments be attributed to more upsetting length than pressure, according to increases of upsetting length, from brittle fracture to ductile fracture was observed. Through the biopsy of the fracture surface, according to the presence of brittle fracture could be evaluated to strength safety. In addition, mechanical strength of gas pressure welding depending on changes in upsetting length was different. Rotary bending test results were obtained to the infinite life according to exhibited higher fatigue limit of 373MPa at upsetting length 25mm.

• Proceedings of the Safety Management and Science Conference
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• 2001.05a
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• pp.149-160
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• 2001

The components of dependability are reliability, availability, maintainability, safety. The dependability thus often designated in terms of RAMS. International Standard IEC 60300 Dependability Management Part 3-5(IEC 60300-3-5) involves application guides of Reliability test conditions and Statistical test principles. This report presents the basic concepts of IEC 60300-3-5 and explanation of its detailed clauses.

• Proceedings of the Korean Reliability Society Conference
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• 2000.11a
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• pp.287-296
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• 2000

원자력 발전소에 사용되는 전자부품들은 원자력 발전소의 안전성 문제로 인하여 다른 곳에 사용되는 전자부품들보다 더욱 높은 신뢰성이 요구된다. 원자력 발전소에서는 주로 안전성이 검증된 외국 제조업체의 전자부품들을 사용해 왔는데, 외국에서 원자력 산업이 퇴조하면서 제조업체들이 원전용 전자부품의 생산을 중단하거나 인건비가 싼 다른 나라에서 주문생산을 하게 되면서 국내 원자력 발전소에서는 이들 외국 제조업체에서 구매한 전자부품들이 짧은 기간 내에 고장을 일으키는 경우를 종종 경험하게 되었다. 이와 같은 상황 하에서 외국 제조업체에서 구매한 전자부품들을 현장에 사용하기 전에 초기에 고장을 일으킬 결함을 제거한 후 사용하기 위하여 번인시험을 실시하였다. 본 논문에서는 원전 제어봉 제어계통에서 사용하는 다이오우드에 대하여 번인시험을 수행한 사례를 제시하고, 경제적으로 번인시험을 수행할 수 있는 방법을 제시하였다.

• Proceedings of the Safety Management and Science Conference
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• 2011.04a
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• pp.407-417
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• 2011

기술 발전 속도가 빨라짐에 따라 부품의 개발기간이 단축되고 있다. 더욱이 최근에는 제품들의 신뢰성이 향상되어 가속수명시험을 실시하더라도 규정된 시험 시간 동안 고장을 발견할 수 없는 경우가 많이 발생하고 있다. 또한 현업에서는 성능열화에 대한 관심이 높아지고 있으며 특히 친환경차에 대한 관심이 많아지면서 연료전지 및 납-배터리의 가속열화시험법개발에 많은 관심이 증대되고 있다. 만약 고장이 발생하지 않는다고 해서 더 가혹한 스트레스를 인가하면 전혀 다른 고장 메커니즘이 나타날 수 있기 때문에 시험의 목적을 달성하기 곤란해진다. 따라서 이런 단점을 보완하기 위해 시간에 따라 정해진 시간마다 열화 특성을 갖는 특성치를 측정하여 수명을 예측하거나 신뢰성을 평가하는 열화시험, 가속열화시험을 이용한다. 본 연구는 열화데이터 분석 방법을 정리하여 현업에 적용 가능한 분석 과정을 제안하고 향후 연료전지 및 납-배터리 가속열화시험 적용방향을 제시하고자 한다.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.3 no.1
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• pp.41-47
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• 2009

This paper describes requirements and test methods for the safety of electromyographs and evoked response equipments to be used for medical examination of the central nerve system and motor-sensory functions in cortex. We first establish internationally harmonized requirements for the safety, and then propose a test procedure and test methods corresponding to the requirements based on the international standards. However requirements for the performance of each equipments are not specified in order to admit maker's specifications. Using a electromyography equipment we verified validity of the test methods proposed. Results of this study can be used as a standard for approval of Korea Food and Drug Administration (KFDA).

• Journal of Food Hygiene and Safety
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• v.14 no.3
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• pp.259-264
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• 1999

To evaluate the bacterial reverse mutation of xylooligosaccharide(XO)s the in vitro Ames test using Salmonella typhimurium (TA9S, TAIOO, TA1535, TA1537) and Escherichia coli (WP2 uvrA) was performed. XO was negative in Ames test with Salmonella typhimurium and Escherichia coli with and without rat liver microsomal enzyme (S-9 fraction). According to the results, XO does not cause bacterial reverse mutation.