• 한국산학기술학회논문지
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• 제16권5호
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• pp.3081-3086
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• 2015

100톤급 굴삭기에 장착할 수 있는 초대형 유압브레이커 개발을 수행하였다. 유압브레이커 설계에 앞서 타격에너지, 분당 타격수 등의 성능을 예측할 수 있는 유압브레이커 해석 방법에 대해 연구하였다. 해석 결과를 바탕으로 초대형 유압브레이커의 설계 및 제작이 이루어졌으며, 유압브레이커가 성공적으로 작동함을 확인하였다. 실제 유압브레이커 작동 시 타격에너지와 분당 타격수를 측정하여, 해석 결과와 비교하였다. 분당 타격수 해석 결과는 큰 오차 없이 실험 결과를 잘 예측하였지만, 타격에너지 해석 결과는 실제 실험 결과와 매우 큰 차이가 나타남을 확인하였다. 초대형 유압브레이커를 성공적으로 개발하였으며, 향후 마찰, 유압회로 등을 고려하여 타격에너지 해석 방법을 보완할 예정이다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1297-1301
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• 1997

Generally, singularity analysis of 6-DOF parallerl manipulators is very difficult and, as result, velocity relation has many uncertainties. In this paper, an alternative method using the local structurizatioin method(LSM) for the analysis of singular configuraions is presented. With LSM, the velocity relation can be represented in a simple form, and the result is totally equivalent to the conventional velocity relation. The velocity relation suggested in this paper gives a closed-form solution of singularities.

• 기술혁신학회지
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• 제3권1호
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• pp.100-112
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• 2000

Significant changes have taken plane in the broadcasting environment as a result of digitalization the emergence of digital television and the convergence of broadcasting and telecommunication. Using input-output analysis this paper analyzes the value of economic effect of digital television in Korea The empirical result shows that total production is expected to increase about 252 trillion Won for the period of 1999-2010.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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• pp.1309-1312
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• 2000

Joints created with concrete construction result in serious weakness from the aspects of both structural and water-barrier function. Several case studies for the inspection of construction joints of column in concrete structure using radar. An analysis method based on radar signal processing using convolution technique is carried out with various patterns of joints in concrete. The computed results were verified by comparing the test results. As a result, radar signal analysis proposed in this study has a possibility of estimating patterns of joints with good accuracy.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.300-306
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• 2002

To construct ligh rail transit, many local autonomous entities investigate the feasibility of project. Especially, many studies attempt to find the probability of private inducement and the method. The purpose of this paper is to develop the light rail transit financial analysis system for private sector, based on the procedure and the method of the financial analysis. This system consistes of the income and cost module. As a result, provide the cash flow, income statement and financial profit statement for the result. We hope that it is contributed to analyze the feasibility of the finance conveniently.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.318-320
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• 2001

This paper deal with analysis linear Halbach array. For the theoretical analysis of linear Halbach array, each magnetic vector of permanent magnet is displied by the Furiere series. A result of analytical method to calculate the magnetic flux density compared with a result of numerical method. when linear Halbach array moves above a conductivity material, a developed force between linear Halbach array and a closed loop is analyzed by the theoretical analysis.

• 한국조경학회지
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• 제36권4호
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• pp.48-64
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• 2008

본 연구는 각종 대규모 개발사업 및 난 개발 등에서 야기되는 경관훼손 문제를 보다 더 효과적으로 대응해 나갈 수 있는 체계화된 경관생태계획 모형을 설정하는데 가장 큰 의의를 두었다. 연구결과는 다음과 같다. 먼저 국내 외 문헌분석 결과, 경관생태계획 모형설정을 위한 계획지표 항목은 자연보호지역의 설정, 습지 비오톱의 관리 및 조성 등 총 60개로 나타났다. 이들을 물리적 지표 항목 중심으로 재설정한 결과 최종적으로 선정된 계획지표 항목은 총 34개로 분석되었다. 사례지 현장조사 결과, 총 17곳의 사례지 내에는 문헌분석에서 도출된 34개의 계획지표들 모두가 출현하고 있는 것으로 나타났다. 또한, 현장조사 과정에서 추가된 계획지표 항목 4개를 포함하여 최종 선정된 계획지표 항목은 총 38개로 나타났다. 세부 계획지표들의 중요도 분석 결과, 대부분 5점 이상으로 비교적 높은 것으로 나타났다. 특히 자연보호지역 설정, 경관보호지역 설정 등은 중요도 값이 6.2 이상으로 매우 높았다. 또한, 세부 계획지표 특성별 유형화를 위해 요인분석을 수행한 결과, '근자연형 생물서식공간의 설치, 복구 및 관리' 등 총 7개의 요인으로 구분되었다. 이상과 같은 세부 계획지표 항목의 유형화 결과 및 중요도 결과 값을 종합 분석하여 1차 경관생태계획 모형을 설정하였다. 1차 모형을 바탕으로 하여 좀 더 체계적인 경관생태계획 모형을 구축하기 위해 '최상 값 선택을 위한 다중비교(MCB)' 분석을 실시하였다. 5가지로 분류된 계획지표 군별 MCB 분석 결과, 각각의 계획지표군 모두에서 최상 값이 확연히 드러나고 있는 것을 확인할 수 있었다. 보전지역, 보완지역 등 총 9가지로 설정된 계획의 기본방향에 대한 중요도 분석 결과, 평균 중요도 참은 보전지역과 보완지역이 각각 4.62와 4.54로 매우 높은 것으로 나타났다. 이상과 같은 1차 모형, MCB 분석 및 계획의 기본방향에 대한 중요도 분석 결과를 종합하여 2차 경관생태계획 모형을 설정하였다. 마지막으로 수직적 전환관계 분석에서 일례로 '보전지역'의 경우 휴양공간 조성을 제외한 모든 계획지표군에서 5.2 이상의 높은 중요도 값을 보였다. 또한, 수평적 연관성 분석의 경우 '추가적 개선, 관리 및 연결조치'와 타 계획지표군과의 연관성 정도는 5.3 이상으로 모두 높은 것으로 나타났으며, 특히 '자연과 경관으로부터 특별히 보호되어야 할 부분'과의 연관성에 관한 중요도는 6.07로 가장 높게 나타났다.

• 한국의류산업학회지
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• 제12권1호
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• pp.80-85
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• 2010

The purpose of this study was to examine the characteristics of armscye circumference which will be used to develop total contents for the apparel industry. The subjects of this study were 16- to 49-year-old women whose 3D body shape data were analyzed. 72 length and length-ratio measurements were taken to each subject' armscye circumference. The used analysis methods are descriptive statistics, principal component analysis, and cluster analysis. The results are follows; 1. Considering the Length of armscye circumference, the result of principal component analysis were extracted 3 factors and those factors comprised 95% of total variance. As the result of the cluster analysis of factor scores, subjects were classified into 4 cluster by their size characteristic. 2. Considering the length-ratio of armscye circumference, the result of principal component analysis were extracted 5 factors and those factors comprised 96.45% of total variance. As the result of the cluster analysis of factor scores, subjects were classified into 5 cluster by their shape characteristic. So that, this research could be useful to manufacture garment which reflected 3D body figure and improved fitting.

• 한국프랜차이즈경영연구
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• 제12권4호
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• pp.13-23
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• 2021

Purpose: This study aimed to derive clues for the franchise industry to overcome difficulties such as various legal regulations and social responsibility demands and to continuously develop by analyzing the research trends related to franchises published in Korea. Research design, data and methodology: As a result of searching for 'franchise' in ScienceON, abstracts were collected from papers published in domestic academic journals from 1994 to June 2021. Keywords were extracted from the abstracts of 1,110 valid papers, and after preprocessing, keyword analysis, TF-IDF analysis, and topic modeling using LDA algorithm, along with trend analysis of the top 20 words in TF-IDF by year group was carried out using the R-package. Results: As a result of keyword analysis, it was found that businesses and brands were the subjects of research related to franchises, and interest in service and satisfaction was considerable, and food and coffee were prominently studied as industries. As a result of TF-IDF calculation, it was found that brand, satisfaction, franchisor, and coffee were ranked at the top. As a result of LDA-based topic modeling, a total of 12 topics including "growth strategy" were derived and visualized with LDAvis. On the other hand, the areas of Topic 1 (growth strategy) and Topic 9 (organizational culture), Topic 4 (consumption experience) and Topic 6 (contribution and loyalty), Topic 7 (brand image) and Topic 10 (commercial area) overlap significantly. Finally, the trend analysis results for the top 20 keywords with high TF-IDF showed that 10 keywords such as quality, brand, food, and trust would be more utilized overall. Conclusions: Through the results of this study, the direction of interest in the franchise industry was confirmed, and it was found that it was necessary to find a clue for continuous growth through research in more diverse fields. And it was also considered an important finding to suggest a technique that can supplement the problems of topic trend analysis. Therefore, the results of this study show that researchers will gain significant insights from the perspectives related to the selection of research topics, and practitioners from the perspectives related to future franchise changes.

• 융합경영연구
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• 제11권3호
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• pp.47-66
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• 2023

Purpose: The purpose of this study is to identify research trends related to ESG by domestic and overseas researchers so far, and to present research directions and clues for the possibility of applying ESG to Korean companies in the future and ESG practice through comparison of derived topics. Research design, data and methodology: In this study, as of October 20, 2022, after searching for the keyword 'ESG' in 'scienceON', 341 domestic papers with English abstracts and 1,173 overseas papers were extracted. For analysis, word frequency analysis, word co-occurrence frequency analysis, BERTopic, LDA, and OLS regression analysis were performed to confirm trends for each topic using Python 3.7. Results: As a result of word frequency analysis, It was found that words such as management, company, performance, and value were commonly used in both domestic and overseas papers. In domestic papers, words such as activity and responsibility, and in overseas papers, words such as sustainability, impact, and development were included in the top 20 words. As a result of analyzing the co-occurrence frequency of words, it was confirmed that domestic papers were related mainly to words such as company, management, and activity, and overseas papers were related to words such as investment, sustainability, and performance. As a result of topic modeling, 3 topics such as named ESG from the corporate perspective were derived for domestic papers, and a total of 7 topics such as named sustainable investment for overseas papers were derived. As a result of the annual trend analysis, each topic did not show a relatively increasing or decreasing tendency, confirming that all topics were neutral. Conclusions: The results of this study confirmed that although it is desirable that domestic papers have recently started research on consumers, the subject diversity is lower than that of overseas papers. Therefore, it is suggested that future research needs to approach various topics such as forecasting future risks related to ESG and corporate evaluation methods.