• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.472-476
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• 2011

Railway R&D technology development projects for the economic value of technology development does not mention the estimated economic impact on future policies must reflect the issues that are raised. In the research phase of technology development by providing value and economic effects can increase the utilization of technology development are considered. However, some items in some way to analyze and quantify its effect on what the procedures are not standardized, not as needed by individual researchers and analysis by providing a variety of reliability problems can occur. Therefore, the development of technologies to measure the value and economic impact analysis and the development of a standardized manual is needed. In this paper, development of railway technology R & D performance (technical, economic) to be estimated by an objective analysis of standardized and that man should aim to create. And the standard manual of the national economic effect in the development of technologies (production inducement effect, the effect of import substitution industries, including analysis using the taxable year), due to technology development and economic benefits (investment in railways in the handbook and the feasibility of the proposed railway project to produce various ally standards), technology development, and on which to base the valuation will.

• KEPCO Journal on Electric Power and Energy
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• 제2권3호
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• pp.415-419
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• 2016

As the need for clean coal technology has grown, so has the global research and development efforts into integrated gasification combined cycle (IGCC) plants. An IGCC plant couples a gas turbine to a gasification block. Various technical and economic problems exist in designing such a system. One such problem is the difficulty in realizing economies of scale because the single-train flow capacity of commercial IGCC synthetic gas turbine plants is limited; the capacity does not exceed a net power rating of 300 MW. To address this problem, this study modeled and simulated a synthetic gas turbine with the goal of evaluating the feasibility of a 500 MW or larger IGCC plant. First, a gas turbine with the best output and efficiency was chosen for use with natural gas. The turbine was modeled using GateCycle (a simulation tool), and the integrity of the model validated by comparing the result to the design value. Next, off-design modeling was carried out for a gas turbine with synthetic gas based on its on-design model, and the result was compared with the study result of the gas turbine manufacturer. The simulation confirmed that it is possible to create a large capacity IGCC plant by undertaking the remodeling of a gas turbine designed to use natural gas into one suitable for synthetic gas.

• 유기물자원화
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• 제4권1호
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• pp.61-72
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• 1996

최근 축조된 습지를 이용한 폐수처리에 대한 관심이 높아지고 있다. 이는 습지이용시스템이 자연정화법을 이용한 처리법으로써 에너지의 소모량이 적고 유지관리가 비교적 간단하며 기술적 난점이 적기 때문으로 판단된다. 그래서 이러한 시스템은 우리나라 농촌지역에서 특히 응용될 수 있는 처리법이라고 생각된다. 본 논문에서는 이러한 처리법을 우리나라에서 적용할 수 있도록 미국 등 구미선진국에서 개발된 축소형 습지에 대한 설계기준에 대해서 논하였다. 본 논문에서 중점적으로 논한 것은 식생의 종류, 자연적 천이와 관리, 식재기법, 파종기법 및 건설 후의 관리이다.

• 한국정보전자통신기술학회논문지
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• 제10권1호
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• pp.117-124
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• 2017

본 논문에서는 미용기기 분야에 대한 특허 동향 분석을 통해 주요 경쟁자별 기술경쟁력 등의 분석을 실시하고, 지식재산권 중심의 기술 동향 분석 등을 바탕으로 과제기술의 특허 포트폴리오 및 특허 확보 전략을 도출하였다. 전략적인 IP(Intellectual Property) 기반 연구개발 계획 수립에 활용할 수 있도록 특허 포트폴리오를 분석하여 특허 장벽 및 공백분야를 제시함으로써, 연구개발의 방향을 설정하기 위한 기초정보로 활용하여 중복연구를 방지하고 연구개발과제 수행의 타당성에 대한 객관적인 특허정보를 제공하고자 한다.

• 한국전기전자재료학회논문지
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• 제28권11호
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• pp.727-730
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• 2015

In this paper, we fabricated organic compounds detector using the MWCNT/PMMA (multi-walled carbon nanotube / polymethylmethacrylate) composite film. We used polymer film as a matrix material for the device framework, and introduced CNTs for reacting with the organic compounds resulting in changing electrical conductivity. Spray coating method was used to form the MWCNT/PMMA composite film detector, and pattern formation of the detector was done by shadow mask during the spray coating process. We investigated changes of electrical conductivity of the detector before and after the organic compounds exposure. Electrical conductivity of the detector tended to decrease after the exposure with various organic compounds such as acetone, tetrahydrofuran (THF), toluene, and dimethylformamide (DMF). Finally we conclude that organic compounds detection by the MWCNT/PMMA composite film detector was possible, and expect the feasibility of commercial MWCNT/PMMA composite film detector for various organic compounds.

• 한국유체기계학회 논문집
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• 제16권1호
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• pp.17-23
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• 2013

Recently so much attention has been focused on renewable energy and, since its sources to exploit are already almost saturated in the country, the practical alternative to this situation could be a micro-turbine which uses the low head and low flow. From a point of view of local micro-turbine design capacity and manufacturing technology, the problems such as the accumulation of technical skills, the expansion of related industries, the national policy expansion and the turbine efficiency to improve are still vulnerable and it's true that there are also negative views about the economic feasibility, the technicity and the operation management of the micro-turbine. However, if the improvement can be done in technology of low-head double regulation micro-turbine to generate more outputs and the operation management can be reliably realized, the micro-turbine will be re-evaluated as an appliable source of renewable energy, even the output is small, and by a paradigm shift, it could realize a power generation as an economic and rational system.

• 대한토목학회논문집
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• 제32권3D호
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• pp.269-274
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• 2012

건설 산업에 대한 자동화 시스템 구축에 대한 연구는 오래전부터 지속되어왔다. 그러나 개발된 자동화 시스템에 대한 성능평가 방안은 아직까지 명확하게 제시된 사례가 존재하지 않는다. 대부분의 연구에서는 이러한 성능평가를 부분적인 요소기술에 대하여 수행하거나, 도입을 통하여 얻는 편익에 집중하여 성능평가가 수행되었다. 본 연구에서는 경제적 타당성과 편익을 동시에 고려할 수 있는 지능형 굴삭 시스템에 대한 성능평가 프레임워크를 구축하였다. 이를 이용하여 자동화 장비에 대한 성능평가 방안을 제시하였으며, 지능형 굴삭 시스템의 현장 적용성을 분석하였다.

• 한국가구학회지
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• 제20권4호
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• pp.281-289
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• 2009

This research examined the technical feasibility of composite that had two layers of fiberglass reinforcement to enhance the load carrying capacity of lumber. Specimens were prepared from standard lumber made of thinning crop trees such as Larix kaempferi, Pinus koraiensis, and P. rigida. Results indicated that bending properties, hardness, and wood screw withdrawal load of low density lumber from the P. koraiensis increased as the number of layers of fiberglass reinforcement increased. Composite produced by VARTM method showed the MOE increased in all specimens, while the MOR differed on the location, whether the 2-layers of FRP is put on tensile zone or compressive zone. The MOR of high density lumber from Larix kaempferi and P. rigida decreased when they placed into tensile zone, but low density lumber from P. koraiensis increased in same location. The bending toughness only increased high density lumber of Larix kaempferi as the number of layers of fiberglass reinforcement increased. The technique developed by this study may increase an opportunity to use small diameter log with low density for commercial purposes.

• 경영정보학연구
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• 제8권1호
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• pp.43-61
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• 2006

향후 전자시장에서 운영될 유비쿼터스 서비스의 상용화를 위해서 유비쿼터스 컴퓨팅 서비스를 평가하는 것은 매우 중요한 이슈로 대두된다. 그러나 유비쿼터스 컴퓨팅 서비스에 대한 평가의 중요성과 유용성에도 불구하고, 유비쿼터스 컴퓨팅 서비스의 평가는 아주 초기단계에 머물러 있다. 더우기, 무엇이 '유비쿼터스 컴퓨팅 서비스'인지의 기준에 대한 연구도 충분히 이루어지지 않은 실정이다. 따라서, 본 논문에서는 유비쿼터스 컴퓨팅 서비스를 평가하는 통합 방법론을 제공하는 것을 목적으로 한다. 다계층 접근법은 기술적 관점 뿐만 아니라 행태적인 관점도 동시에 포함하고 있다. 평가 모델의 실행 가능성을 보이기 위해, 3가지의 사용 예를 연구하고 평가하였다.

• International Journal of Aeronautical and Space Sciences
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• 제17권1호
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• pp.80-88
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• 2016

For next generation global navigation satellite systems, new carrier frequencies in Ku/V band are expected to emerge as a promising alternative to the current frequency windows in L band as they get severely congestive. In the case of higher frequency bands, signal attenuation phenomenon through the atmosphere is significantly different from the L band signal propagation. In this paper, a fundamental investigation is carried out to explore the Ku/V band as a candidate frequency band for a new global satellite navigation carrier signal, wherein specific attention is given to the effects of the dominant attenuation factors through the tropospheric propagation path. For a specific application, a candidate orbit preliminarily designed for the Korean regional satellite navigation system is adapted. Simulation results summarize that the Ku band can provide a promising satellite navigation implementation considering the present satellite's power budget, while the V band still requires technical advances in satellite transceiver system implementations.