• 전력전자학회논문지
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• 제21권4호
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• pp.356-363
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• 2016

The design methodology of an adequate input voltage and magnetizing inductance to minimize reactive power is suggested to design a wireless power transfer (WPT) converter for high-power transfer efficiency. To increase the magnetizing inductance, the turn number of the WPT coil is increased, thus causing high parasitic resistance in the WPT coil. Moreover, the high coil resistance produces high conduction loss in the transfer and receive coils. Therefore, the analysis of conduction loss is used in the design of the WPT coil and the operating point of the WPT converter. To verify the proposed design methodology, the mathematical analysis of the conduction loss is presented by experimental results.

• Asia pacific journal of information systems
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• 제26권4호
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• pp.542-560
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• 2016

This study determines whether or not firms can achieve high productivity growth through external technology acquisition. It also identifies the key factors affecting adopting firms' productivity growth by employing the Malmquist productivity index (MPI) methodology, which features computational ease, low data dependency, and decomposition of productivity growth into technical efficiency change and technical change. Results showed that the effects of productivity growth arising from technology transfer became stronger over time. Moreover, patent transfer guaranteed firms' productivity growth, but no evidence was found that factors such as age and size could increase productivity. Finally, cultural similarity could be another factor conditioning the effectiveness of technology transfer in the productivity of adopting firms.

• 시스템엔지니어링학술지
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• 제6권2호
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• pp.15-20
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• 2010

Even though the efficient public transportation system has been issued in many areas, a few practical methodology of analysis and evaluation of the transit system has been developed since applying the practical methodology faces many difficulties as a feasible solution. For example, designing the public transit transfer system needs the feasible consensus of requirement and solution among the related people and institutes, which the system engineering concept should be involved. It is necessary and confident to analyze and evaluate the public transit transfer system in term of system engineering process.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1297-1299
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• 2005

This paper deals with the static analysis of slotless BLDC motor. The transfer relations methodology is employed for predicting the electromagnetic characteristics, with reference to the magnetic field distribution.

• 한국의류산업학회지
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• 제8권5호
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• pp.562-570
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• 2006

Knit industry requires versatile knit designers who have to control whole process such as material select, color, type of machine, technique, structure and shape. In other words, knit designers urgently need to interplay between technology and design aesthetics. It becomes essential to learn and master basic principles of knitting in order to design and develop effectively for innovative knitwear design. The main purpose of this study is to show fresh methodology through examining the various applications of 'Stitch transfer knitting structure' used in women's knitwear design development. Stitch transfer knitting structure is one of the most popular techniques among various basic knitting methods. Eight knitwears were designed and produced with various types of formative applications which differ from existent stitch transfer knitwears of flat and simple style in the market. These are produced by computer knitting machine 'Shima Seiki 122S' and programmed by 'Knit CAD' software. Among various basic stitch transfer pattern, 'Leaf' pattern is selected as a most effective example for this study. This fabric applied to collar, sleeves, body pattern and accessories as formative decoration. It is expected that this study of methodology helps to get open mind and to indicate possibility to develop and show creative and innovative knitwear and knitted textile design.

• 한국기록관리학회지
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• 제14권3호
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• pp.33-54
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• 2014

이 연구의 주요한 목적은 2015년부터 진행될 본격적인 전자기록 이관과 관련하여 영구기록물관리기관과 기록관이 어떤 활동을 진행하고 있는지를 드러내기 위한 것이다. 이관방법론 표준에 근거하여 공공 전자기록 이관과 관련하여 중요하게 확인해야 하는 활동 영역을 도출하고 2014년 현재 시점에서의 이관 현황을 돌아보았다. 이 과정을 통해 2015년으로 예정된 본격적인 전자기록 이관에 있어 주요하게 문제가 발생할 것으로 예상되는 지점을 확인하고, 향후 안정적인 공공 전자기록 이관을 준비하기 위해 충분히 논의되어야 할 문제들을 가시화하고 공론의 장을 마련하는 기초를 마련하고자 하였다.

• Nuclear Engineering and Technology
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• 제42권5호
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• pp.590-599
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• 2010

Recently, efficient operation and practical management of power plants have become important issues in the nuclear industry. In particular, typical aging parameters such as stress and cumulative usage factor should be determined accurately for continued operation of a nuclear power plant beyond design life. However, most of the major components have been designed via conservative codes based on a 2-D concept, which do not take into account exact boundary conditions and asymmetric geometries. The present paper aims to suggest an effective fatigue evaluation methodology that uses a prototype of the integrated model and its transfer functions. The validity of the integrated 3-D Finite Element (FE) model was proven by comparing the analysis results of individual FE models. Also, mechanical and thermal transfer functions, known as Green's functions, were developed for the integrated model with the standard step input. Finally, the stresses estimated from the transfer functions were compared with those obtained from detailed 3-D FE analyses results at critical locations of the major components. The usefulness of the proposed fatigue evaluation methodology can be maximized by combining it with an on-line monitoring system, and this combination, will enhance the continued operations of old nuclear power plants.

• Nuclear Engineering and Technology
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• 제38권3호
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• pp.251-258
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• 2006

This study presents an idea of using analogy concept to the heat transfer studies regarding the HTGR development. Theoretical backgrounds regarding the idea were reviewed. In order to investigate the predictability of a mass transfer system for heat transfer system phenomenology, an electroplating system coupled with a limiting current technique was adopted. Test facilities for laminar forced convection and natural convections under laminar and turbulent conditions were constructed, for which heat transfer correlations are known. The test results showed a close agreement between mass transfer and heat transfer systems, which is an encouraging indication of the validity of the analogy theory and the experimental methodology adopted. This paper shows the potential of the experimental method that validates the little-understood heat transfer phenomena, even in complex geometries such as HTGR.

• 한국디지털건축인테리어학회논문집
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• 제13권3호
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• pp.5-14
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• 2013

In recent years, the change of urban function and the decrease in birth rate have given rise to merge, abolition and relocation of the existing schools. This study explores the possibilities for various land utilizations of disused school sites, aims to propose the effective asset management and the proper development methodology. Firstly it examines the status of small class school in urban area and the linkage complex development method. Among various methods, it compares the validity between the closed school management and public asset management method. In addition, it analyses the national finance method and public-private partnership investment as a proper development methodology to ensure both the common-benefit and profitable business. As a result of study, it prposes the BTO(build-transfer-operate) method to use effectively the disused school sites in urban area.

• 한국ITS학회 논문지
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• 제15권3호
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• pp.60-67
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• 2016

환승누적함수에서 환승회수가 증가되면 환승비용에 대한 개별적인 환승의 영향이 선형 또는 비선형적으로 증가된다. 이 함수는 버스 또는 철도와 같이 대중교통노선에서 경로를 선택하는 승객의 행태를 효과적으로 설명한다. 이 함수로 통행시간이 더 소요되더라도 환승이 적은 대중교통노선을 선택하는 일반적인 상황의 구현이 가능하다. 그러나 환승누적함수가 포함되는 통행비용은 비가산성비용으로 최적경로탐색을 위해서 경로열거라는 어려운 상황을 포함한다. 본 연구는 환승누적함수를 고려하여 최적경로를 탐색하는 효과적인 방안을 제안하였다. 이를 위해 우선 환승누적함수가 포함되는 경우 경로탐색과정에서 나타나는 최적경로역전 현상을 설명하였다. 또한 복수의 경로를 탐색해서 최소의 비용경로를 최적경로로 선택하는 경험적인 방안을 제안하였다. 유입링크기반 전체경로삭제기법을 복수경로탐색기법으로 채택하여 알고리즘의 경로최적조건의 증명성에 기반하여 K개의 경로를 탐색하는 방안을 제안하였다. 환승계수를 도입하는 사례연구를 통하여 제안된 방안의 실제 교통망에 대한 활용성을 논의하였다.