• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.130-132
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• 2006

For the reliability assessment of solenoid actuator, firstly, we analyzed the cause of major failures and the effect of each failure modes through FMEA and FTA, and decided the main test items through 2-stage QFD. And then, as a measure of life of solenoid actuator, TypeII censored five data were collected from and operation test which was performed as the life test of solenoid actuator. In this paper, we present the reliability parameters of solenoid actuator like shape parameter, scale parameter, etc., which they are produced by MINITAB analysis and marking of Weibull probability paper using the measure of life, and also present the 6 kinds of detailed failure mode analysis.

• 산업기술연구
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• 제26권B호
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• pp.135-144
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• 2006

The significance of hydro-power plant is increasing in its public roles such as flood control and water supply as well as electric power production. Even if high level of reliability in facility operation is required, no specific reliability research has been made. This specifically stems from the lack of technology and research investments. The eventual goal of this study is to secure a methodology for reliability analysis of hydro-power plant so that an appropriate decision for operation and investment can be made. Specific effort was put to develop a reliability model for water supply system within hydro-power plant. For this study, we briefly examined the overview of the hydro-power plant including the electric power generation facility system. We then discussed the facility reliability analysis methodology for hydro-power plant. Based on rigorous examination of the water supply system and components roles, we drew major failure modes for each component and examined their effects.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.645-646
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• 2008

In order to evaluate a solenoid actuator's reliability, the following three-step approach was used: (1) we analyzed the cause and effect of major failures through FMEA and FTA, decided the main test items through 2-stage QFD; (2) after a performance test was carried out, five-sampled data were collected from the it; finally, we decided the reliability parameters for the industrial solenoid actuator. The reliability parameters, such as the shape parameter(${\beta}$), the scale parameter(${\theta}$), etc., were analyzed inductively by the use of MINITAP and the Weibull probability model which has been used practically in the study of the reliability.

• 한국항공운항학회지
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• 제21권2호
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• pp.21-25
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• 2013

The system and components for aircraft are required the design data on which the safety requirements are properly reflected for their certification. This paper presents the procedure and results of a safety assessments analysis for the rotorcraft fuel pumps in oder to confirm and verify them. The fuel pumps design assessment must be performed, including a detailed failure analysis to identify all failures that will prevent continued safe flight or safe landing. In order to assess the fuel pumps design safety, not only system safety hazard analysis and but FTA(Fault Tree Analysis) for proofing the safety objective of the fuel pumps are performed. The results of the safety assessment for fuel pumps validate that no single failure or malfunction could result in catastrophic failure or critical accidents of the rotorcraft.

• 정보와 통신
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• 제31권5호
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• pp.54-60
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• 2014

국내 농업은 농가인구의 감소와 고령화로 인해 노동력 부족현상이 발생하고 있으며, 사료 원부자재비 에너지 비용 등의 생산비 증가와 FTA 등 농업 시장 개방 가속화로 인하여 많은 어려움에 직면해 있다. 또한 소비자의 고품질 농수산물에 대한 수요 증가와 농수산물의 안전성에 관한 관심으로 인하여 농수산물의 품질향상 및 생산성 제고가 필요한 시점이다. 이러한 문제를 해결하기 위해서 농업 ICT 융합기술의 연구와 개발을 통해 농업의 생산정밀화 유통지능화 소비안전화에 기여하고, 이를 통해 농업 분야의 경쟁력을 제고하는 것이 필요하다. 본고에서는 농업 ICT 융합기술의 개념과 국내외 농업 ICT 융합 관련 정책 및 연구동향을 살펴보고, 농업 ICT 융합기술 개발 사례와 국내 농업 ICT 융합기술의 문제점을 분석하여 국내 농업 ICT 융합기술의 발전 방안을 모색하고자 한다. 농업 ICT 융합기술의 발전 방안을 모색하고자 한다.

• 정보보호학회지
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• 제21권6호
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• pp.57-66
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• 2011

국내 스마트폰의 사용자는 2천만 명에 도달하고 있고, Wi-Fi Zone과 3G망 뿐만 아니라, 4G WiBro와 LTE로 속도까지 향상 되어 스마트폰의 활용은 더욱 높아지고 있다. 또한 일부 스마트폰 사용자들은 본인의 스마트폰 단말기를 해킹과 루팅을 통하여 멀티미디어 콘텐츠를 불법으로 이용하고 있다. 이는 한 미 FTA체결에 저작권의 법적 문제제기가 있다. 또한 기존의 이동통신 2G, 3G 휴대폰들과 스마트폰은 휴대용 이용기기로서, 범죄에 사용되는 직간접 증거들과 관련성이 높아서, 휴대폰과 스마트폰에서 생성 저장된 디지털 증거에 대한 스마트폰 포렌식 적용에 대한 연구가 필요하다. 스마트폰은 휴대폰 보다 다양한 기능을 지원해주기 때문에 스마트폰의 사용정보에는 연락처, 통화기록, 인터넷, 메세지, 사진, 동영상 등의 많은 정보를 가지고 있으며 이러한 정보는 포렌식 수사 과정에서 사용자의 행위를 유추하는데 도움이 될 수 있다. 본 디지털 증거 수집과 분석을 위한 스마트폰 포렌식 적용에서는 법정에서 사용될 포렌식 증거의 수집과 분석을 위한 압수 수색 방법과 주의할 점을 연구하였다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제7권3호
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• pp.127-136
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• 2007

The accelerated life tests(ALTs) and degradation characteristics of image intensifier assembly(KIT-7) under low illuminance and high temperature were investigated. The accelerated life tests were carried out at $5{\times}10^5\;fc-40^{\circ}C,\;10{\times}10^5\;fc-40^{\circ}C,\;5{\times}10^5\;fc-50^{\circ}C,\;10{\times}10^5\;fc-50^{\circ}C$ and relationship related to illuminance and temperature was used as an accelerated life test model. An ALTA program[6] was used to calculate an acceleration factor and the test of life distribution fit, and estimate three parameters of an life test model. To sum up, MTTF 10,000 h at $5{\times}10^{-5}\;fc-40^{\circ}C$ of image intensifier assembly was certificated.

• 한국신뢰성학회지:신뢰성응용연구
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• 제5권2호
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• pp.241-259
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• 2005

The environmental problem is a main subject of the 21C and an environment destruction phenomenon by various kinds of environmental materials is reaching serious level. Nations to be classified as the environmental developed country, are born again environmental rich country. And they earn a large income by trade Every kind environmental resource in an international commercial transaction. Especially, the study that a reliability assessment method to prevent to reliability problem to be happened when the solder lead(lead-free solder), non-cd component, non-bromide component(without the polybrominated biphenyls(PBB) and polybrominated diphenyl ethers(PBDE))and hexavalent chromium(Cr VI) clearance component and mercury-free applied to electronic equipment is progressed. As the result of the study for applying of a reliability assessment technique of lead-free solder that recognized the most of urgent problem at the company, combination accelerated life test could taken by adding and appling the part of a humidity acceleration part to Eyring Model which is proposed by R.E.Thomas. The reliability assessment methods study of PWB clean environmental materials is expected to respond to a reliability elevation and environmental material regulation policy spreading all over the world by beginning form Europe.

• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2005년도 학술발표대회 논문집
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• pp.393-404
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• 2005

The environmental problem is a main subject of the 21C and an environment destruction phenomenon by various kinds of environmental materials is reaching serious level. Nations to be classified as the environmental developed country, are born again environmental rich country. And they earn a large income by trade Every kind environmental resource in an international commercial transaction. Especially, the study that a reliability assessment method to prevent to reliability problem to be happened when the solder lead(lead-free solder), non-cd component, non-bromide component(without the polybrominated biphenyls(PBB) and polybrominated diphenyl ethers(PBDE))and hexavalent chromium(Cr VI) clearance component and mercury-free applied to electronic equipment is progressed. As the result of the study for applying of a reliability assessment technique of lead-free solder that recognized the most of urgent problem at the company, combination accelerated life test could taken by adding and appling the part of a humidity acceleration part to Eyring Model which is proposed by R.E.Thomas. The reliability assessment methods study of PWB clean environmental materials is expected to respond to a reliability elevation and environmental material regulation policy spreading all over the world by beginning form Europe.

• 무역학회지
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• 제43권4호
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• pp.131-153
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• 2018

이 연구의 목적은 정략적으로 평가해오던 우리나라의 제1차 정보기술협정(ITA1) 이행성과를 정성적인 측면에서 보완하는 것이다. ITA와 같은 자유화 협정의 성과와 한계는 정량지표를 위주로 평가돼왔고, 지표가 보여주지 못하는 심도 있는 논의는 쉽게 간과돼왔다. 가장 성공적인 WTO 협정이자 우리가 가장 큰 수혜국이라고 평가되는 ITA1의 성과를 정성적인 측면에서 돌아 보는 것은 자유화 협정의 질적인 성과에 대한 논의를 통해 기존 이론의 간극을 메운다는 점에서 학문적 의의가 있다. 또한, 2차 ITA는 물론 FTA를 포함한 자유화 협정의 질적 이행성과의 향상을 위한 주안점과 시사점을 찾는다는 점에서 실천적 의의가 있다. 연구결과는 품목분류의 전문성과 함께 자유화가 이뤄지는 산업의 역량을 발전시키는 것이 자유화 협정의 수혜를 지속하는 데 중요하다는 것을 보여준다.