• 전기학회논문지
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• 제57권6호
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• pp.1026-1031
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• 2008

We report on the design and experimental results of a large diameter faraday rotator for the high-power laser system(KLF: Kaeri laser facility) that was completed in late 2007s at Korea Atomic Energy Research Institute. The design involves modelling the magnetic field of cylindrical coil with large diameter(110 mm). Magnetic field generation coil is designed by 6 layers using a rectangular wire with cross-sectional area $3{\times}5[mm^2]$. We obtain an isolation ratio for optical feedback of 35 dB at 1064 nm and magnetic field strengths ${\sim}25kG$. We expect that the design can be widely used optical isolators in high-power laser system.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1998년도 터널.암반역학위원회 박사학위 논문집
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• pp.153-204
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• 1998

Prediction of lining loads due to tunnelling is one of the major issues to be addressed in the design of a tunnel. The objective of this study is to investigate rational and realistic design loads on tunnel linings. factors influencing the lining load are summarized and discussed. The instruments for measuring the lining loads are reviewed and discussed because field measurements are often necessary to verify the design methods. Tunnel construction in the City of Edmonton has been very active for storm and sanitary purposes. Since the early 1970's, the city has also been developing an underground Light Rail Transit system. The load measurements obtained from these tunnels are compared with the results from the existing design methods. However, none of the existing methods are totally satisfactory, Therefore, there is some room for improvement in the prediction of lining loads. The convergence-confinement method is reviewed and applied to a case history of a tunnel in Edmonton. The convergence curves are obtained from 2-D finite element analyses using three different material models and theoretical equations. The limitation of the convergence-confinement method is discussed by comparing these curves with the field measurements. Three-dimensional finite element analyses are performed to gain a better understanding of stress and displacement behaviour near the tunnel face. An improved design method is proposed based on the review of existing design methods and the performance of numerical analyses. A specific method or combination of two different methods is suggested for the estimation of lining loads for different conditions of tunnelling. A method to determine the stress reduction factor is described. Typical values of dimensionless load factors nD/H for tunnels in Edmonton are obtained from parametric analyses. Finally, the loads calculated using the proposed method are compared with field measurements collected from various tunnels in terms of soil types and construction methods to verify the method. The proposed method gives a reasonable approximation of the lining loads. The proposed method is recommended as an approximate guideline for the design of tunnels, but the results should be confirmed by field measurements due to the uncertainties of the ground and lining properties and the construction procedures, This is the reason that in-situ monitoring should be an integral part of the design procedure.

• 한국도로학회논문집
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• 제19권3호
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• pp.1-10
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• 2017

PURPOSES : This paper focuses on strength development according to the mix design with cement type and mineral admixture from laboratory and field tests in cool weather. METHODS : Two methods evaluated the mix design of concrete pavement in cool weather. Firstly, laboratory tests including slump, air contents, setting time, strength, maturity, and freezing-thawing test were conducted. Three alternatives were selected based on the tests. Secondly, a field test was conducted and the optimum mix design in cool weather was suggested. RESULTS : It is an evident from the laboratory test that a mix with type III cement showed better performance than the one with type I cement. There was a delay in strength development of a mix with mineral admixture compared to mix design without any mineral admixture. In the field test, type III cement+flyash 20% mix design proved the best performance. CONCLUSIONS : For concrete pavement in cool weather, mix design using type III cement could overcome the strength delay due to mineral admixture. Moreover, it is possible to make sure of durability of pavement. Therefore, strength and durability problems due to cool weather would decrease.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.538-541
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• 2007

본 연구에서는 복합 AAM 영구 앵커를 소개하고, 앵커의 설계시 인발력($P_a$)에 의해 앵커에 작용하는 힘의 관계 검토, 지압파괴에 대한 검토, 앵커사이 지반에서의 인장파괴 유발하중 검토 등을 통하여 복합 AAM 영구 앵커의 설계법을 소개하였다. 그리고 복합 AAM 영구 앵커의 거동특성을 알아보기 위하여 설계법의 의한 예측결과와 현장인발시험 결과를 비교 검토하였다.

• 한국유체기계학회 논문집
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• 제1권1호
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• pp.64-71
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• 1998

The non-uniform pressure generated in the volute generally are propagating upstream. As a result, outlet conditions of rotaing impeller are changed and the performance degrades. The major object of this research is to develop the numerical method which can calculate the effects of impeller and volute flow field interactions. Under the assumption of steady three-dimensional incompressible turbulent flow, the time averaged N-S equations involving $k-{\epsilon}$ turbulent model was solved by the F.V.M. To verify the computational method, the calculations are compared with experimental results published in literature and show satisfactory agreement with them, The three-dimensional flow characteristics within the volute of a centrifugal fan at design and off-design operating points have also been studied.

• International journal of advanced smart convergence
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• 제12권4호
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• pp.321-327
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• 2023

The current rapid development of artificial intelligence technology has involved all aspects of the production field. The development of various algorithms and programs has pushed artificial intelligence to a new peak. Due to its complexity and diversity in the field of architectural design, the positive impact of artificial intelligence technology on architectural design is discussed from the perspective of conceptual design. For museums, which are one of the increasingly popular public facilities, the introduction of artificial intelligence technology has provided certain help in assisting the conceptual design of the museum. This article analyzes the theoretical and practical support of artificial intelligence technology in improving conceptual design, analyzing the architectural appearance, structural layout, materials, etc., to increase the feasibility and practicality of assisting conceptual design. It has certain reference significance for building a modern, advanced, international and interactive modern museum.

• 한국콘텐츠학회논문지
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• 제13권1호
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• pp.467-481
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• 2013

21세기 새로운 교육 패러다임으로 주목받고 있는 스마트교육은 2015년부터 학교 현장에 본격적으로 도입될 예정이다. 이에 본 연구에서는 스마트교육이 기존 수업과 어떤 차별성을 갖고 수업을 설계 적용해야하는 지에 대한 지침을 제공할 수 있는 스마트교육 수업 설계 모형을 개발하였다. 또한 개발한 수업 설계모형의 타당성과 적용 가능성을 파악하기 위해 전문가 평가를 실시하였으며, 이를 학교 현장에 시범 적용하였다. 그 결과 스마트교육 환경에서 체제적인 수업 설계를 위한 기반을 마련하고, 21세기 학습자 역량을 신장시키는데 초점을 맞춘 수업 설계 모형이라는 긍정적 반응을 얻을 수 있었다. 본 연구가 스마트교육을 실천하게 될 일선 현장의 교사들에게 작은 보탬이 되기를 기대한다.

• 한국가구학회지
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• 제28권1호
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• pp.60-71
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• 2017

Today, as the standard of customers is getting higher, the period "Value Consumption" has come. "Brand Stretching" which is to expand business from own field of business to "Fusion Design", "Art Collaboration" focusing on diversified demand and emotion of consumer is in trend. Global fashion enterprise which is particularly sensitive to trend and influential to various field of business, has now transformed to total lifestyle enterprise and now started to show off furniture design to improve the value and image of the brand. This thesis has classified methodological types to apply furniture design and background of furniture design in fashion enterprise, analyzed and examined cases, and interpreted the possibility and direction of understanding to furniture design in various aspects.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
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• pp.488-491
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• 2004

Numerical analysis of the three dimensional turbulent flow field in a complex valve shape is carried out to confirm the flow field whether the designed valve shape is good or not. The simulation of the incompressible flow in a constant flowrate control valve is performed by using the commercial code, FLUENT/UNS 6.0. The results of flow field show the designed valve has some problems, therefore these will be good data for new valve design.

• 한국콘텐츠학회논문지
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• 제11권12호
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• pp.690-699
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• 2011

현재 그린 디자인은 제품 디자인 분야에서 대부분 개념적으로 거론되고 있다. 디자이너와 제조사는 환경문제에 대한 관심이 부족하고, 디자이너는 그린 디자인에 대한 명확한 원칙적인 이론 기초가 부족하다. 이 때문에 그린 디자인의 방법과 과정 연구는 매우 절실하다. 본 연구에서는 DFX (Design for "X")방법은 우수한 디자인을 창출하기 위해 원칙적인 방법이라고 설명한다. "x"는 여러 가지 창조성 가치를 의미한다. 이를 근거로서 본 연구에 DFMs, DFR, DFA, DFD의 원칙을 방향으로 시계 제품 시장 중에 어떤 제품을 그린디자인 개념을 유지한다는 것과 긍정적 표현을 설명한다. 본문은 현제 시장에 시계 제품의 중류를 대표할 수 있는 30개 제품을 샘플으로 선정하여 DFX의 원칙을 기반으로 평가를 하였다. Framework을 이용하여 평가결과에 따라 그린 디자인 원칙을 가장 맞추지 않은 원료문제를 중심으로DFMs 원칙들을 지침으로 실험을 전개한다. 그린 디자인 기본 개념보다 DFMs방법을 도입하여 실험과정에서는 핵심요점을 더욱 쉽게 파악할 수 있고 최종 원성 결과물을 통한 DFX방법의 중요성을 간접적인 설명하게 된다.