• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.805-807
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• 2005

A basic assessment is presented of the technical, economic and strategic challenges expected for manufacturing displays in a roll-to-roll format. Two general pathways are considered; one that results in dramatic cost reductions but results in sacrificing product performance, and another which is an extension of the conventional FPD cost-reduction from increased substrate size. While Roll-to-Roll fabrication is fundamentally possible, feasibility experiments will be required to address the most significant technical challenge: achieving and managing acceptable yield. In all respects, the efforts to achieve RTR manufacturing will be assisted by overlapping interests in other application areas such as flex circuit, photovoltaics and large area lighting.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2004년도 춘계학술발표대회 논문집
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• pp.30-33
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• 2004

This paper suggested that the technical specification of tilting train EMU for speed up on existing lines. High speed strategy of existing lines are the modification of railway system which are made on cant, lengths of transition curves, the catenary system and train system. Tilting technology is more useful a strategy for speed increases on existing lines with low investment needed. We performed a feasibility study which is considered out real track conditions and designed propulsion and braking system of tilting EMU system.

• 한국건설관리학회논문집
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• 제12권5호
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• pp.103-116
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• 2011

도로변 크랙실링 공법은 도로면에 발생된 크랙을 초기에 효과적으로 보수함으로써 후속 크랙 방지 및 동결피해를 방지하고 도로 하부 구조를 보호하여 도로의 평균상태지수를 높일 수 있는 예방적 유지보수 공법이다. 그러나 재래식 도로면 크랙실링 공법은 작업의 특성상 교통량이 많은 대도시나 고속도로에서 대부분의 작업이 수행되므로 작업 노무자의 안전성을 확보하기 어렵고, 숙련공의 부족으로 인해 작업 생산성 및 품질이 저하되는 등 문제점을 지니고 있다. 1990년대 초반부터 북미 등 선진 외국에서는 재래식 도로변 크랙실링 공법을 자동화하기 위한 연구를 지속적으로 수행하고 있으며 국내에서도 2001년부터 2004년까지 도로면 크랙실링 자동화 장비를 개발하고 현장 실험을 수행한 바 있으나, 작업 품질, 제어의 복잡성, 고가의 장비 구입 가격 등은 개발 장비를 실용화함에 있어 문제점으로 지적되어 왔다. 따라서 본 연구에서는 재래식 크랙실링 공법 및 국내외에서 연구 개발된 도로면 크랙실링 자동화 장비의 문제점을 해결하고 국내 도로 상황과 규정에 부합되는 도로면 크랙실링 자동화 장비의 최적 개념 디자인을 제안하고 원척의(Full-scale) 장비 개발을 위한 제안 기술의 타당성을 분석하였다.

• 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.

• 대한환경공학회지
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• 제28권12호
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• pp.1255-1261
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• 2006

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 추계학술대회 논문집
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• pp.257-260
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• 1995

The Field Emission Display promises to improve upon the performance of the traditional CRT, while overcoming the CRTs disadvantages in size and weight which limit its use in portable applications. The technical feasibility of the FED has been reviewed and expeceted to move toward the product development.

• 한국태양에너지학회 논문집
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• 제28권6호
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• pp.70-77
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• 2008

The purpose of this study evaluates a feasibility and economical efficiency of new renewable energy. According as weather change is serious problem now days, every people make attention to the reduction of greenhouse gas. The revitalization of new renewable energy creates the variety of energy source, stability of energy supply and reduction of greenhouse gas. In this study evaluates a feasibility and economical efficiency from new renewable energy of various photo voltaics, wind power, small hydro and biogas. Feasibility does in standard of technical characteristic, politic support, marketability, establishment present condition and development aim. Economical efficiency does in standard of developmental unit cost, utilization factor, equipment life, politic support cost, interest ratio. The results of this study were as follows photo voltaics, wind, small hydropower, biogas in order feasibility is high. Developmental unit cost, utilization factor, equipment life, politic support cost and analyzed the relationship of interest ratio fluctuation and economical efficiency. From all new renewable energy the utilization factor most is important in economical efficiency but necessary utilization factor is difficult because environmental problem.

• 신재생에너지
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• 제18권1호
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• pp.35-45
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• 2022

The renewable energy based MG is becoming one of the prominent solutions for greenhouse gas and constructing less power lines. However, how to procure the economics of MG considering the CO₂ emission and utility network impact is one of major issues as the proportion of renewable resource increases. This paper proposes the feasibility study scheme of campus MG and shows that the LCOE and CO₂ emission can be reduced by utilizing the excess power and introducing hydrogen system and plus DR. For this, the three cases: (a) adding the PV and selling excess power to utility, (b) producing and selling hydrogen using excess power, and (c) participating in plus DR are considered. For each case, not only the topology and component capacity of MG to secure economic feasibility, but also CO₂ emission and utility network effects are derived. If an electrolyzer with a capacity of 400 kW participates in plus DR for 3,730hours/year, the economic feasibility is securable if plus DR settlement and hydrogen sale price are more than 7.08¢/kWh and 8.3USD/kg or 6.25¢/kWh and 8.6USD/kg, respectively. For this end, continuous technical development and policy support for hydrogen system and plus DR are required.

• 한국환경생태학회지
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• 제11권2호
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• pp.210-213
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• 1997

본 연구는 하천환경의 생태적 재생을 목적으로 자연형 저수로 호안공법을 개발하기 위해 수행되었다. 이를 위해 실험하펀으로 선정한 양재천 학여울 구간에 사주부, 수충부, 얕은 만 3가지 유형의 하안경관 특성에 따라 촌 10가지 공법을 개발, 시험 족용하였다. 각 호안공법의 설계에서는 정수식물의 식재에 중점을 두었으며 설계된 공법들은 현장 적용되었고, 적용후 1년간의 경관 형성과정과 식생복원 모니터링을 실시ㅏ였다. 일ㄹ 통해 자연형 저수로 호안공법의 기술적 실행 가능성을 높여, 관행적으로 행해지고 있는 하천공법을 대체할 수 있는 생태적 대안을 제시하였다.

• 천문학회보
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• 제42권2호
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• pp.52.2-52.2
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• 2017

Recent success of gravitational wave (GW) detection by LIGO opened a new window to expand our understanding of the Universe. In addition to LIGO, several other developments are going on or under planning. However, each of these detectors has a specific sensitive frequency range. There is a missing frequency band, 0.1-10 Hz, where detectors loose sensitivity significantly due to Newtonian noise on the Earth. We introduce a plan to develop a Superconducting Low-frequency Gravitational- wave Telescope (SLGT), which can observe massive black holes in 0.1-10 Hz. The SLGT system consists of magnetically levitated six test masses, superconducting quantum interference devices (SQUIDs), rigid support frame, cooling system, vibration isolation, and signal acquisition. By taking the advantage of nearly quantum-limited low-noise SQUIDs and capacitor bridge transducers, SLGT's detection sensitivity can be improved to allow astrophysical observation of black holes in cosmological distances. We present preliminary design study and expected sensitivity, and its technical feasibility.