• 조명전기설비학회논문지
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• 제26권7호
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• pp.39-44
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• 2012

This paper deals with the characteristic analysis of small power brushless DC (BLDC) motor considering the rotor magnet overhang flux. In the driving characteristics analysis using 2D FEA (Finite Element Analysis), the rotor magnet overhang effect can't be considered and it should be neglected. To consider rotor magnet overhang effect, 3D FEA should be required. But 3D FEA requires very long calculation time even though the high specification computer is used. In this paper, the 3D electromagnetic model of BLDC motor is approximated as the 2D electromagnetic model considering overhang effect. In this paper, the concept of overhang coefficient is applied, and the coefficient according to load torque variance is deduced.

• 한국기록관리학회지
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• 제11권2호
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• pp.165-188
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• 2011

본 논문은 교사와 학생을 대상으로 제공하는 교육용 기록정보콘텐츠를 개발하는데 있어 핵심적인 단계인 교육과정 분석과 컬렉션 분석의 방법을 제시하고 이 방법에 따라 교육용 기록정보콘텐츠의 예시를 설계하였다. 본 논문은 고등학교 수업에서 통일 교육의 교재로 활용할 수 있는 교육용 기록정보콘텐츠를 설계함으로써 앞서 제안한 교육과정 분석과 컬렉션 분석의 적용 가능성을 검증해보고, 교육과정과 연계되어 활용할 수 있는 교육용 기록정보콘텐츠의 모델을 제시하고자 하였다.

• 한국농촌건축학회논문집
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• 제16권4호
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• pp.59-66
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• 2014

This paper deals with vibration of plates with concentrated mass on elastic foundation. The object of investigating natural frequencies of tapered thick plate on pasternak foundation by means of finite element method and providing kinetic design data for mat of building structures. Free vibration analysis that tapered thick plate in this paper. Finite element analysis of rectangular plate is done by use of rectangular finite element with 8-nodes. In order to analysis plate which is supported on pasternak foundation. The Winkler parameter is varied with 10, $10^2$, $10^3$ and the shear foundation parameter is 5, 10. This paper is analyzed varying thickness by taper ratio. The taper ratio is applied as 0.0, 0.25, 0.5, 0.75, 1.0. And the Concentrated Mass is applied as P1, Pc, P2 respectively.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 추계학술대회 논문집
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• pp.305-312
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• 1998

A formulation to perform static equilibrium and linear vibration analysis is presented in this paper. The formulation employs minimum number of equations of motion which are derived by using a partial velocity matrix, The static equilibrium analysis is performed first, then the linear vibration analysis is performed at the static equilibrium position. By using the formulation presented in this paper, static equilibrium and linear vibration analysis of a high speed electric train system are performed. A single bogie system, a power vehicle, and a train system which consists of five vehicles are analyzed, respectively. Natural frequencies and a few lowest mode shapes of the three are identified in this paper.

• 동아시아경상학회지
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• 제8권4호
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• pp.45-65
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• 2020

Purpose - This paper is to analyze the system and the models of financial analysis in the assessment of economic consistency and the creditability of borrower. To test the process of complex express-analysis, it is utilized by the concentric matrix models by using the matrix of 5×5.. Research design, data, and methodology - The estimation of economic consistency, the creditworthiness, the complex express-analysis with application of concentric matrix models were carried out on the basis of data of the report for the 2017 of corporations POSCO and in the first half of the 2018 Daewoo Shipbuilding & Marine Engineering of South Korea. Results - This paper focused on the unbalance of the corporate financial structure (capital, receivable) and the assessment of sustainability development, taking into account the liquidity, solvency, financial sustainability and economic viability of the enterprise. Conclusions - this paper also consider the theoretical means of regulating receivables. The material is presented in the pedagogical context and appendix of the conclusion.

• 국제초고층학회논문집
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• 제12권1호
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• pp.83-91
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• 2023

Under the dual pressure of population growth and land shortage, threedimensional development is the inevitable choice for cities in China. In such a scenario, a mixed-use complex has considerable potential in its realization and research. Based on space syntax and the three-dimensional visibility graph analysis, this paper describes the spatial and functional layout of the Shanghai Super Brand Mall and studies the relationship between spatial visibility and user behaviour through linear regression analysis and correlation analysis. This paper studies three different types of user behaviour, namely, path selection, staying selection, and store selection, and finds that spatial visibility and accessibility have different effects on user behaviour depending on the type and purpose of the activity. This paper reveals the influence of spatial and functional layout on user behaviour and puts forward the corresponding design strategy under the three-dimensional environment.

• 공학교육연구
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• 제7권3호
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• pp.5-18
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• 2004

이 연구는 1998년부터 수행된 직업교육훈련 프로그램 개발을 위한 직무분석 기초 연구로서 교육 훈련 자격 분야에서 활용도를 높일 수 있도록 2002년도에 개발된 직무분석 지침서를 보완하고, 2003년에 이 연구와 함께 수행된 $\ulcorner$직업 변동에 관한 연구(III)$\lrcorner$에서 추출된 환경 산업 관련 직업 중에서 직업교육훈련과정 및 출제 기준을 개발하기 위해 선행적으로 요구되는 10개 직업을 선정하고, 직무분석을 실시하여 이들에 대한 교육 과정, 훈련 기준, 자격 검정의 출제 기준을 개발할 수 있는 기초 자료를 제작 보급하는 데 목적이 있다. 이 연구의 내용은 첫째, 직무분석 관련 선행 내용을 분석하고, 둘째, 직무분석 지침서를 보완하며, 셋째, 직무분석 대상 직업을 선정한 후, 넷째, 직업교육훈련과정 및 출제 기준을 개발하기 위한 직무분석을 실시하고, 그 결과를 제공하는 것이다. 이 연구의 목적을 달성하기 위한 연구 방법으로는 직무분석 관련 선행 연구 및 자료 분석, 직무분석 보완 및 대상 직업 선정과 직업별 직무분석을 위한 전문가 협의회, 데이컴법(DACUM process)을 이용한 직무분석 등을 실시하였다. 이 연구는 우선 직업교육훈련과정의 개발을 위한 직무분석의 모형을 절차별로 정리 제시하였는데, 1단계는 직무분석 준비, 2단계는 직무모형 설정, 3단계는 지식, 기능, 도구 추출, 4단계는 선수 코스 및 교과목 선정, 5단계는 교육 훈련 내용 상세화, 6단계는 출제 기준 설정 등으로 구성되어 있다. 이 연구에서는 이러한 절차에 따라 10개 직업에 대한 직업별 직무분석이 진행되었다.

• 펄프종이기술
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• 제42권5호
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• pp.67-73
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• 2010

Paper packaging materials are essential in protection and transportation of commercial or industrial products. Raw materials for packaging paper production are mainly obtained from various grades of waste paper. For this reason, the recycled fibers from waste paper would probably have possibility of containing heavy metals. This study was focused on the development of optimum pre-treatment method for the quantitative analysis of mercury. The optimum pre-treatment for open digestion system were obtained at the treatment conditions of acid combination with $HNO_3/HCl/H_2O_2$ or $HNO_3/H_2SO_4$ at $80^{\circ}C$. The optimum pre-treatment conditions in closed digestion system were determinated by the acid combination with $HNO_3/HCl/H_2O_2/HF$ in microwave at 320 W for 20 min. The recovery rate in open digestion system was 85~94% and in closed digestion system was indicated as about 100%. Therefore, the closed system is superior than the open system in pre-treatment method for the quantitative analysis of mercury, and the detected mercury contents in the sample of KOCC, AOCC and kraft sack paper were measured below 1 ppm.

• 대한환경공학회지
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• 제32권9호
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• pp.818-829
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• 2010

본 연구는 기후변화의 영향평가와 경제학적 분석에 관한 국내 외 연구현황을 살펴봄으로써 우리나라의 효율적인 기후변화 적응대책 수립을 위한 방향을 제시하고자 한다. 본 연구는 기존연구들이 분석한 기후변화의 경제학적 비용 및 농업, 건강 등과 같은 부문별로 기후변화의 경제학적 분석을 수행하는데 이용된 지표들을 살펴보았다. 분석에 이용된 지표들과 결과들을 비교, 분석하는 데에 있어 국내연구를 중점적으로 살펴봄으로써 국내연구의 현주소와 나아가야 할 방향을 제시한다. 마지막으로 기후변화 적응정책에 대한 연구현황을 통하여 적응정책의 발전과정과 적응방안들을 살펴보고 적응정책의 연구에 대한 방향을 제안하고자 한다.

• Asian Journal of Business Environment
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• 제6권2호
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• pp.27-32
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• 2016

Purpose - This paper aims to analyze and investigate to find out the appropriate ways to make an easy TBT of smart city. It is an important issue between Korea and China because TBT of smart city has lots of advantages in IT, S/W, IOT, and Home network. Research design, data and methodology - First, the paper made use of reviewing2nd data analysis and focused on group interview, and then compared with analysis on the international rule and system such as smart city system, technical regulation, and standard through test certification procedure and inspection. Second, this paper reviewed electric/electronic test, certification, and calibration. Third, through analyzing MRA between Korea and china, the paper focused on SDoC, Mutual Acceptance of International certification, and IECCB scheme. Results - Through the comparison and analysis, this paper found that it is important to promote multi-track agreements with the countries that need short-term promotion. Moreover, it is necessary to conclude an agreement with the leading countries in Middle East and Central America. Conclusions - Through the above the reviews and analysis, we can see the importance of promotion in FTA and MRA with the efforts to remove the obstacles and promote to make an easy TBT by MRA between Korea and China.