• 한국수소및신에너지학회논문집
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• 제33권6호
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• pp.761-768
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• 2022

In the hope of realizing carbon neutrality, Korea has established the goal of expanding the supply of hydrogen electric vehicles through a roadmap to revitalize the hydrogen economy. A prerequisite for successful supply expansion is securing the safety of hydrogen electric vehicles. Certain parts, such as the hydrogen transport pipe and tank, in hydrogen electric vehicles are exposed to high-pressure hydrogen gas over long periods of time, so the hydrogen enters the grain boundary of material, resulting in a degradation of the parts referred to as hydrogen embrittlement. In addition, since the safety of parts utilizing hydrogen varies depending on the type of material used and its environmental characteristics, the necessity for the enactment of a hydrogen embrittlement regulation has emerged and is still being discussed as a Global Technical Regulation (GTR). In this paper, we analyze a hydrogen compatibility material evaluation method discussed in GTR and present a direction for the development of Korean-type hydrogen compatibility material evaluation methods.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 춘계학술발표회
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• pp.1221-1222
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• 2005

Interface control activities during the nuclear power plant (NPP) construction and operation have been reviewed for enhancing the safety of NPP. The primary focus of the study is given on analysis of lessons learned from the recent significant events of Korean Standard Nuclear Power plant (KSNP), such as a series of break-off of thermal sleeves at YGN 5 & 6 and radioactivity leak at YGN 5, in respect of interface control. Based on the results of the analysis, this study recommends measures for the improvement of interface control among utility and technical supporting organizations (TSO), and suggests new regulatory systems, such as reporting of safety significant non-conformances, to effectively verify the adequacy of interface control activities during construction and operation of NPPs.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 공동학술발표회
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• pp.219-219
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• 2017

• 한국압력기기공학회 논문집
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• 제18권1호
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• pp.1-10
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• 2022

Currently, there is no technical standard and regulation for seismic analysis of non-nuclear safety piping. Accordingly, ASME Sec.III ND, a standards applied to safety class 3 piping, is applied. However, the technical standard applied for other than seismic analysis is ASME B31, which leads to controversy. In this study, the feasibility of applying ASME B31E was confirmed by reviewing rulescomparing technical standards, and evaluating piping allowable stress margins. The evaluation revealed that applying ASME B31.1 as a technical standard is too conservative compared to ASME Sec.III ND. On the other hand, ASME B31E (issued at the request of the industry) clearly presents the technical standards for seismic analysis of ASME B31 piping, and shows a similar level of conservatism compared to ASME Sec.III ND. It is expected to reduce the controversy over technical standards for seismic analysis of non-nuclear safety piping by applying ASME B31E.

• 한국전자파학회논문지
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• 제17권6호
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• pp.574-586
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• 2006

최근 세계 무선 통신 환경은 선진국가별로 다양한 통신 기술에 대한 기준 마련 및 표준화가 진행되고 있다. 이에 따른 통신 환경 변화에 대처하기 위하여 국내에서도 여러 분야에 걸쳐 다양하게 기술 기준 및 표준화에 대한 연구가 진행되고 있다. 본 연구에서는 미약 무선국의 전계 강도(기술 기준)에 대한 현재 각국의 동향과 그 기준치를 연구 분석하고, 파악함과 동시에, 또한, 전자파 적합 등록에서 제시하고 있는 각국의 전계 강도 기준치와 연계하여 이에 적합한 국내의 비허가 무선 기기(미약 무선 기기)의 실질적인 도입 가능한 전계 강도의 기준치를 제시함을 목적으로 한다. 여기에서 제시한 전계 강도 허용치를 바탕으로, 미약 무선 기기의 보급과 발전에 기여할 것으로 예상되며 국내 통신 시장은 물론 국제 통신 시장에서 경쟁력을 갖출 수 있을 것으로 예상된다.

• 한국식품영양학회지
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• 제15권2호
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• pp.126-130
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• 2002

고온성이며 호알칼리성인 Bacillus sp. TA-11이 생성하는 Invertase의 생합성 조절 기작을 규명하고자 먼저 이들의 유도와 억제에 관하여 검토하였다. Invertase는 10mM sucrose을 함유한 생합성 조절배지에서 3시간에 효율적으로 유도되었고 glucose는 sucrose에 의한 invertase 유도를 inducer exclusion 방식으로 억제시켰다. CAMP의 첨가로 glucose에 의한 catabolic repression이 다소 줄어들었다.

• 자동차안전학회지
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• 제12권3호
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• pp.20-26
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• 2020

Many children have died (Heat stroke deaths) in the U.S. after being left alone in cars during hot weather, especially summer season. According to related report, more than 800 children have died of heat stroke from being trapped in a hot car since 1998. The regulation party, government has started to make not only technical regulation to prevent tragedy but also legislate to punish. However the 75% of accident has occurred unintended by their parents. So punishment is not the best solution for this case. So in this study, we analyze the trend of regulation and technology to save occupant who remained back seat. And finally we propose a countermeasure to prevent heat stroke deaths.

• 한국유기농업학회지
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• 제11권1호
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• pp.1-19
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• 2003

Nowadays liquid manure can no longer be regarded as a waste product, but as a compound fertilizer, which should be used as efficiently as possible, especially on the farm. Additionally, there is the intensified public discussion about environmental issues. With respect to the ecological effects of the proper application of liquid manure, administrative regulations in the form of guidelines, decrees and ordinances have been established in region. It is questionable though, if such quantifying restrictions bring a reduction of ground water pollution, or if not through these measures new problems will be created, i. e. be temporarily postponed. Moreover, in this Study, possible Operation and technical Improvement are presented.

• 펄프종이기술
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• 제45권4호
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• pp.42-51
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• 2013

Climate changes have become the major issue for the sustainable society and the various regulation has been established for promoting low carbon and green growth in Korea. The paper industry as a large comsumer of energy is forced to cope with these regulation. In this study, the various examples were investigated for providing the basic schemes to develop environmental management strategies of Korean paper industry. The various cases to follow carbon economic were introduced and were categorized into five ways, for example, the carbon capture projects such as reforestation, the increasing the process efficiency, the resource recovery form process waste, the cogeneration systems, the application of non-woody biomass.

• Journal of Electrical Engineering and Technology
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• 제12권4호
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• pp.1537-1547
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• 2017

In this paper, a discrete-time robust current controller is proposed for PMSM drives. The structure of the proposed controller is quite simple and does not require high computational resource. The only difference of the proposed controller from the classical dead-beat controller is the integral term which can easily be implemented in a PMSM drive. The stability analysis of the proposed controller is performed accounting in parametric uncertainties, unmodelled dynamics and disturbances in the mathematical model. The boundedness of the dynamical system and asymptotic convergence of dq-axes currents to their reference values are provided under certain conditions. Various simulation and experimental studies are performed and the results taken at different operation conditions show the validity of the proposed controller.