• 대한전기학회논문지:전력기술부문A
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• 제54권7호
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• pp.366-374
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• 2005

The purpose of this study is to find out main factors affecting public enterprise's environment , which improves the performance of public enterprise. In detail, under the premises of keeping publicity in Korea Electricity Industry, the main target of this study is to seek after factors enhancing entrepreneurship and deals with publicity which is related with entrepreneurship. Questionnaires are distributed to the employee of public enterprise, public servants, and civil corps. A total of 553 copies are collected. The main contents of questionnaires are related with the effect of publicity and entrepreneurship by government control, competitive environment and shareholding structure in Korea Electricity Power Corporation(KEPCO). The results of this survey are as follows : First government control is negatively related to the entrepreneurship while it is positively related to the Publicity. Second, this suey shows that competitive environment has a Positive influence on promoting both publicity and entrepreneurship. Third this survey in connection with shareholding structure indicates that present structure in KEPCO has a positive effect on publicity but negative effect on entrepreneurship. According to this empirical results, it is verified that the main issues on the performance of KEPCO ue related with the level of government control and competitive environment in its industry.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.337-338
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• 2006

The purpose of this study is to find out main factors affecting public enterprise's environment, which improves the performance of public enterprise. In detail, under the premises of keeping publicity in Korea Electricity Industry, the main target of this study is to seek after factors enhancing entrepreneurship and deals with publicity which is related with entrepreneurship. Questionnaires are distributed to the employee of public enterprise, public servants, and civil corps. A total of 553 copies are collected. The main contents of questionnaires are related with the effect of publicity and entrepreneurship by government control, competitive environment, and shareholding structure in Korea Electricity Power Corporation(KEPCO). The results of this survey are as follows : First, government control is negatively related to the entrepreneurship while it is positively related to the publicity. Second, this survey shows that competitive environment has a positive influence on promoting both publicity and entrepreneurship. Third, this survey in connection with shareholding structure indicates that present structure in KEPCO has a positive effect on publicity but negative effect on entrepreneurship. According to this empirical results, it is verified that the main issues on the performance of KEPCO are related with the level of government control and competitive environment in its industry.

• 한국산업융합학회 논문집
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• 제23권4_1호
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• pp.559-567
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• 2020

As the renewable energy market grows, grid-connected inverters have been improving and expanding in several fields in recent years because energy conversion devices are the main components of solar systems. In this paper, a high-precision new grid-connected three-phase inverter system is proposed. The proposed system consists of a main inverter, a sub inverter and a transformer. The main inverter operates at a low switching frequency and high power and transmits power to the grid. A sub-inverter connected in series with the transmission line through a matching transformer operates at lower power than the main inverter to provide input values to the transformer. The transformer acts as a power supply according to the voltage compensation value. This study is based on the principle of operation of the UPFC(Unified Power Flow Controller) structure used to regulate power flow in AC transmission lines. The grid-connected inverter system proposed in this paper is implemented with high precision and high resolution. The proposed system was verified through its ability to enhance and ensure the safety of the proposed system through simulation and experiment.

• East Asian Economic Review
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• 제16권3호
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• pp.227-247
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• 2012

This paper investigates the source of bilateral trade imbalance at industry level. We build a simple model based on gravity theory and derive the prediction that the bilateral trade balance in an industry is increasing in the difference between trading partners in the output share of the industry. We test this prediction and find that the difference in industry share is highly significant in predicting both the sign and the magnitude of trade balance at industry level. We also find that FTAs tend to enlarge trade imbalance at industry level. However, the overall predictive power of the model is rather limited, suggesting that factors other than production specialization are important in determining trade balance at industry level. Another finding of the paper is that the influence of the difference in industry share on trade balance increases as we move to industries that produce more homogeneous products. This finding calls into question monopolistic competition as the main driver of gravity in international trade.

• 디지털산업정보학회논문지
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• 제11권4호
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• pp.165-175
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• 2015

Based on reviewing the literature and statistical year books on current projects that are targeting Industry 4.0 and Smart Factory, this paper aims to show concepts of Industry 4.0, and Smart Factory. Also it shows 5 projects for Industry 4.0 led by governments that worry over their low employment and productivity in main industrialized countries: Germany, China, Japan, the USA, and Korea. In addition it presents some problems which are very important but easy to be overlooked, especially on employment, and it makes three suggestions to solve employment problems. First, government should tax the profit which a company makes on reducing workers in spite of a high rate of profit through technology innovation. Second, to help small businesses to last longer, government should link major companies and small companies. Third, government, academic circles and the industrial world should take part in configuring consortia like American "Industry talent Consortium" to cultivate IT Talent.

• 대한안전경영과학회지
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• 제4권3호
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• pp.157-166
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• 2002

With the introduction of the Internet in the 21st century, the manufacturing-oriented industry, so called EMS(Electronic Manufacturing Service) specialized in manufacturing only, is rapidly expanding. From the beginning of the year 2000, the EMS industry in advanced countries around the world, whereas a strong Motivation System in which a manufacturing related staff plays a main role, has began providing the source of competitiveness. And this industry is regarded as a core of management linking productivity directly to management performance. Thus, all the manufacturing sectors including not only the electronic industry but also mechanical industry in the future are observed to be divided into two industries; a Maker strategy industry focused on marketing and development, and a EMS industry specialized in manufacturing. Therefore, we need to evaluate whether the industries should continue to support the Manufacturers Strategy or attempt to change into the EMS industry However, with no approved evaluation standard on hand as to an actual EMS industry, in this thesis, we develop the EM(EMS-Maker) Chart in order to analyze both the Manufacturer Strategy and the EMS industries.

• 한국항만경제학회지
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• 제31권4호
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• pp.53-73
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• 2015

본 논문은 2010년 29부문 광양만권특화 지역산업연관모형을 구축하여 광양만권 해운항만산업의 지역경제에서의 위치, 지역산업과의 연관성 그리고 지역경제에의 파급효과를 분석한다. 주요결과는 다음과 같다. 2010년 기준 국가 해운항만산업 대비 광양만권 해운항만산업의 생산액, 부가가치액, 취업자의 비중은 각각 약 10.8%, 6.06%, 2.92%이며, 지역 전체산업 대비로는 각각 약 1.96%, 2.28%, 2.44%이다. 국가 총 항만서비스 수요 대비 광양만권 해운항만서비스 수요의 비중은 약 6.4%이다. 입지분석결과, 생산액 기준, 부가가치 기준, 그리고 종사자 수 기준 모두에서 해운항만산업은 광양만권 서비스부문 중 유일하게 전국대비 특화도가 1보다 큰 부문으로, 지역의 서비스부문은 해운항만산업에 특화된 산업구조를 가지고 있다. 한편, 해운항만산업은 지역주력제조업과 지역의 주요 생산자서비스업과 높은 연관성을 가지고 있다. 특히, 석유 및 화학은 해운항만산업과 전후방연관성이 모두 높으며 1차금속은 전방연관성이 높다. 도소매 및 기타운수 보관은 해운항만산업과 전후방 연관성이 모두 높으며, 금융 보험, 부동산, 사업서비스 등은 후방연관성이 높다. 수요 및 공급측면에서 종합적으로 분석한 광양만권 해운항만산업의 지역경제 파급효과는 약 6조 원의 생산유발효과, 약 2조5천억 원의 부가가치유발효과, 약 1만 6천 명의 취업유발효과 등으로 광양만권 지역경제 총 생산의 약 4%, 총 부가가치의 약 5.8%, 그리고 총 취업자의 약 6.7%가 해운항만산업과 연관되어 있다.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제4B권4호
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• pp.206-210
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• 2004

This paper deals with a parameter estimation of the DC-DC converter system for its diagnosis. Especially, we present the results of parameter estimation for the DC-DC converter model by the system identification method. The parameter estimation for the DC-DC converter system aims at the diagnosis of its operating status. For the operating status diagnosis of the DC-DC converter system, we assume that the DC-DC converter system is an equivalent model of the Buck converter and estimate the main parameter for on-line diagnosis. In addition, for verification of an estimated parameter, we compare a bode plot of the estimated system transfer function and measurement results of the HP4194 instrument. It is a control system analyzer for system transfer function measurement. Our results confirm that the main parameter for diagnosis of the DC-DC converter system can be estimated by the system identification method and that the aging status of the system can be predicted by these results on operating status.

• 청정기술
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• 제8권4호
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• pp.205-215
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• 2002

포장 산업의 발전과 재활용 활성화로 인해 캔 산업은 급속히 성장하였으나 공급과잉에 의해 수익성은 낮아졌다. 그러므로 캔 산업이 경쟁력을 확보하기 위해서는 제조공정의 개선을 통해 공정을 최적화하고 또한 환경부담을 감소시키는 것이 필수적이라고 할 수 있다. 본 연구에서는 전과정평가를 이용하여 알루미늄 캔 제조공정의 주요이슈를 규명하였다. 그 결과 불량캔을 저감하고 타유를 제거하는 것이 주요이슈로 규명되었다. 도출된 문제점의 개선안으로 정수시설 도입과 살균타유분리시스템 설치, 세척노즐 변경, 초순수 가온시스템 설비를 도입하였다. 개선결과 6.4개월만에 투자비를 회수하며 연간 약 3억원을 절감할 수 있을 것으로 조사되었다.

• The International Journal of Costume Culture
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• 제4권3호
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• pp.171-181
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• 2001

The Purpose of this study first was to establish the concept based on the existing convention theory, and classifies the types of industrial aspect, and cultural and artistic aspects. Based on it, the relative importance of structural elements of the fashion convention industry is analyzed to fashion conventions in the industrial aspect. The research applies Delphi technique, it is applied to experts in the fashion convention industry in two rounds. Re result is as follows ; First, exhibitions and collection of the fashion convention industry are classified into five groups by examining their main types and main targets. Second, in fabric·material exhibitions, the procedure, personnel and communication have relatively equal importance on the whole although facilities are considered most important. in clothing·fashion exhibitions, the procedure has by far a high level of importance unlike others. Third, comparing the second stage importance, it is shown that the event hall, pubic relations, professionalization of personnel, communication between the promoter and supporting organization are most important with a slight difference by type. Fourth, comparing the third stage importance, it is revealed that ten most important factors are the event location, publicity time, the size·number of event halls customer handling , expertise, publicity media, friendliness, facilities, Publicity Publications, and business competence.