• 디지털산업정보학회논문지
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• 제12권2호
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• pp.1-6
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• 2016

Several efforts to replace the use of existing fossil energy resources have already been made around the world. As a result, a new industry of renewable energy has been created, and efficient energy distribution and storage has been promoted intensively. Among the newly explored renewable energy sources, the most widely used one is solar energy generation, which has a high market potential. An energy storage system (ESS) is a system as required. In this paper, the design and implementation of an ESS for the efficient use of power in stand-alone street lights is presented. In current ESS applied to stand-alone street lights, either 12V~24V DC (from solar power) or 110V~220V AC (from commercial power) is used to recharge power in systems with lithium batteries. In this study, an ESS that can support both solar power and commercial power was designed and implemented; it can also perform emergency recharge of portable devices from solar powered street lights. This system can maximize the scalability of ESSes using lithium batteries with efficient energy conversion, with the advantage of being an eco-friendly technology. In a ripple effect, it can also be applied to smart grids, electric vehicles, and new, renewable storage markets where energy storage technology is required.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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• pp.179.1-179.1
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• 2010

This paper has represented about the wind power industry of the west-south seashore with leading industry development for Honam Economic Region. These projects have composed of wind power industry of the west-south seashore, offshore wind turbine(2MW, 3MW) and onshore wind turbine(3kW, 5kW, 10kW), 11 projects, during 3 years- with honam leading industry development for economic region. The contents of these project are 3 favorable products and 3 business support projects. The favorable products are the MW offshore wind system with Outer-rotor type PMSG, the 3MWoffshore wind system with adaptation type of west-south sea, the hybrid generator system with wind turbine technology basis.

• 자원ㆍ환경경제연구
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• 제18권4호
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• pp.745-766
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• 2009

특정 산업의 시장지배력을 측정할 때 일부 생산 투입요소의 시장가격이 존재하지 않을 경우 한계시장비용을 초과한 가격 markup으로 판단한 수치는 현실을 왜곡시킬 수 있다. 투입된 모든 생산요소의 가격들의 함수인 비용함수를 추정하는 데 있어서 총 시장비용에서 이들 투입요소에 대한 지출비용이 누락되면 완전경쟁산업에서의 시장가격이 한계시장비용을 초과하는 상황이 발생한다. 한국 제조업의 경우 원재료의 시장가격이 존재하지 않을 뿐만 아니라 관련 자료의 부족으로 공해저감자본의 가격지수를 산정하는 것이 거의 불가능하다. 본 논문에서는 환경규제를 받는 한국 철강산업의 시장지배력에 대한 가격 markup 추정치의 신뢰성을 제고하기 위하여 최적 수준의 원재료와 공해저감자본의 투입량을 전제로 제약비용함수를 도출한 후 공급관계식과 함께 연립방정식으로 추정하였다. 공급가격에 대한 시장지배력 markup의 비율로 측정한 국내 철강산업의 시장지배도는 1982년부터 2001년까지 연평균 0.49로서, 환경규제를 고려하지 않을 경우 약 8% 과대평가되는 것으로 나타났다.

• 디지털산업정보학회논문지
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• 제9권1호
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• pp.53-58
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• 2013

In this paper, we proposed low power algorithm for battery residual capacity and a task. Algorithm the mobile devices power of the battery residual capacity for the task to perform power consumption to reduce the frequency alters. Task is different in power consumption according to kinds of in time accomplishment device to use. Adjustment of power consumption analyzes kinds of given tasks from having the minimum power consumption task to having the maximum power consumption task. Control frequency so that power consumption waste to be exposed to battery residual capacity can be happened according to the results analyzed. Experiment the frequency by adjusting power consumption a method to reduce using [7] and in the same environment power of the battery residual capacity consider the task to perform frequency were controlled. Efficiency was proved compare with the experiment results [7]. The experiments results show increment in the number of processing by 45.46% comparing with that [7] algorithm.

• 한국환경과학회지
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• 제18권8호
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• pp.933-940
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• 2009

Recently, wind power generation is an emerging industry expanding its market rapidly thanks to the increasing need to solve the scarcity of fossil fuels and the risk of potential global warming. Wind power generation has shown to be an effective response plan to global warming, showing the most price competitiveness among the renewable energy sources by its higher efficiency. Therefore wind energy has attracted considerable attention as the industrial growth drive for the next generation. Considering Korea's high dependence of overseas energy resources, the importance of wind power is growing as the most effective alternative energy source to ensure energy security as well as becoming a key strategic industry for exports. In this study, the social and economic effects of the wind power industry is discussed and the current status and the future prospects of the wind energy market is also examined.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 1999년도 High Temperature Superconductivity Vol.IX
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• pp.12-12
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• 1999

• 자원ㆍ환경경제연구
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• 제23권2호
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• pp.349-364
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• 2014

본 연구에서는 제조업종의 전력소비와 생산활동 간 인과관계를 분석하기 위해 1985년~2011년 동안의 업종별 연간 전력소비량과 실질부가가치 자료를 이용하여 단위근검정, 공적분검정, 오차수정모형을 통해 시계열분석을 수행하였다. 연구결과 제조업 전체적으로 양방향의 인과관계가 존재하는 것으로 나타났다. 업종별 특성에 따라 구분하여 도출한 인과관계에서도 전력비다소비업종, 고부가가치업종, 저부가가치업종에서는 전력소비와 생산활동 간에 양방향의 인과관계가 존재하는 것으로 나타났다. 다만 전력다소비업종의 경우 전력소비에서 생산활동으로의 단방향 인과관계가 발견되었다. 이러한 결과는 전력수요관리정책은 효율개선을 우선적으로 추진하여 생산활동에 미치는 부정적인 영향을 최소화해야 하고, 증가하는 전력수요를 안정적으로 충족하기 위한 전력공급체계를 구축할 필요가 있음을 보여준다.

• 산업경영시스템학회지
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• 제41권3호
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• pp.21-29
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• 2018

The cooperative relationship between Employer and Contractor in the construction industry is the most important factor to achieve the project success. Employer shall draw the Contractor's cooperative behavior during executing the project. A study on the impact of the Owner's power on the contractor's cooperative behavior is rare in the construction industry in Korea even though the negative impact of the high-power distance between the Employer and the Contractor has been a hot issue in Korea. In this empirical study, it is shown that the Employer's power can address the contractor's cooperative behavior. The respondents were mostly employees in the domestic construction companies who have experienced in the construction projects. The total number of respondents was 317 effectively. The multiple regression analysis using SPSS 21.0 were conducted to verify the hypotheses. In conclusion, the Mediated Power is positively associated with the In-Role Behavior and with the Extra-Role Behavior. Some of Non-Mediated Power is positively associated with the In-Role Behavior and with the Extra-Role Behavior. It seems that the Contract underestimate the Employer's Expert Power. It was known that the cooperative power caused by Non-Mediated Power is good for long term relationship of the business to business transaction. So it is highly recommended that the Employer shall foster its expertise.

• 산업경영시스템학회지
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• 제19권39호
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• pp.117-128
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• 1996

Plant is production unit which consists of hardware for manufacturing like machinery, equipments and software for its installation like design, construction, supervision, engineering, know-how and trial operation. In the view of this, plant industry can be defined as an aggregation of manufacturers and sellers of plant. In this study, I would like to present the direction of cooperation for mutual benefit of Korea-Japan by understanding international competitive power of both countries' plant industry, which is not only growing as a national strategic industry, but also occupying the most important part in international economic cooperation.

• 디지털산업정보학회논문지
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• 제9권3호
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• pp.49-57
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• 2013

Power-saving PC software enables the inexpensive power control, but the installation of the power-saving software in all computers in the organization is not an easy task. Computer users in the organization are usually not cooperative as they do not think the power-saving cost is directly related to themselves. The PC power-saving system provides advantage to driving active participation in which users installs the power saving software by restricting IP address through the power management server. However, the problem with this approach is the security vulnerability to IP spoofing attacks, therefore we need to solve the problem that disrupt the entire network system rather than saving electric power. This paper proposes the security authentication system that can implement the efficiency saving power by providing high security for the members' computer system of the public institutions based on the PC power-saving system. Also, by analyzing it in comparison with other method, it is possible to check that the prospects of safety and efficiency are strengthened.