• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.717-719
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• 1996

An artificial neural network(ANN) modeling is presented using the Input-output power characteristics of SMES. When using the ANN which functions as a model-free system, network construction and determination of learning parameters are carefully chosen to represent the complicated nonlinear input-output relation from the black-boxed SMES system. The proposed ANN-based SMES model is applied to analyse the power system stability and the simulation results provide the property of this approach.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.879-881
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• 2003

For quite a long time various researches and developments of superconducting magnetic energy storage(SMES) device for enhancement of power quality control of sensitive electric toad. This paper describes the design, fabrication and experimental results for the 3MJ SMES magnet made by using the design code of a SMES device that we developed. A computer code was developed to find the parameters of the SMES magnet which has minimum amount of superconductors for the same stored energy, and the 3MJ SMES magnet was designed based upon that.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부A
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• pp.298-300
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• 1998

The superconducting magnetic energy storage (SMES) system which has characteristics of high efficiency and rapid response is a way to maximize a utility's generation and transmission capacity. But SMES is required for much capital and operating cost. Therefore, It is important to determine the optimal size of SMES for constructing and operating. In this paper, we proposed a method of determinating an optimal size of a large scale of SMES for energy storage and a small scale of SMES for stabilizing power system.

• 무역학회지
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• 제44권4호
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• pp.101-114
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• 2019

E-business enables SMEs to reduce transaction costs and maintain export competitiveness in rapidly changing overseas markets. It is required to raise the entrepreneurial awareness of e-business of exporting SMEs. This study examines the characteristics of enterprises that play an important role in the introduction and utilization of e-business by domestic export SMEs. It explores the mechanisms that search and exploit these opportunities in an entrepreneurial way, and examines the process leading to export performance. We conducted a survey for empirical analysis and analyzed the data from 316 companies using e-business in Korea. As a result, both the international entrepreneurial orientation and the IT competence tended to be significant for the perception of e-business entrepreneurs and showed a different pattern in terms of size of influence. In addition, cooperation and operation among e-business entrepreneurs' perceptions have a direct impact on the export performance of SMEs.

• 한국IT서비스학회지
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• 제21권1호
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• pp.81-102
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• 2022

Although more than 99% of all Korean companies are small and medium-sized enterprises (SMEs), which accounts for a large part of the national economy, they are having difficulties in securing information protection capabilities due to problems such as budget and manpower. On the other hand, as 97% of cyber incidents are concentrated in SMEs, it is urgent to strengthen the information protection management and response capabilities of SMEs. Although the government is promoting company-wide information security consulting for SMEs, the need for supplementing it's procedures and consulting items is being raised. Based on the results of information security consulting supported by the government in 2020, this study attempted to derive improvement plans by interviewing SME workers, information security consultants, and system operators. Through the research results, it is expected to create a basis for SMEs to autonomously check the information security management system and contribute to the reference of related policies.

• 한국초전도ㆍ저온공학회논문지
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• 제9권3호
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• pp.67-71
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• 2007

The electrical insulation design of 600 kJ conduction cooled high-Tc superconducting magnetic energy storage (SMES) have been studied in this paper. The high voltage is applied to both ends of magnet of high-Tc SMES by quench or energy discharge. Therefore. the insulation design of the high voltage needs for commercialization. stability. reliability and so on. In this study. we analyzed the insulation composition of a high-Tc SMES. and investigated about the insulation characteristics of the materials such as Kapton. AIN. $Al_2O_3$. GFRP and vacuum in cryogenic temperature. Base on these results. the insulation design for 600 kJ conduction cooled high-Tc SMES was performed.

• 자원ㆍ환경경제연구
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• 제17권1호
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• pp.83-120
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• 2008

최근 경제와 산업 전반에서 중소기업의 환경성과와 환경활동은 지속가능 발전의 관점에서 특히 관심이 고조되고 있다. 중소기업을 지속가능성 체계(stainability framework)에 포함시키기 위해 진행되고 있는 다양한 노력 중에서도 그 동안 대기업이 주도하던 친환경공급망관리(Supply Chain Environmental Management)는 중소기업의 환경활동을 촉진시키는 유용한 수단으로 인식되고 있다. 본 연구는 우리나라 전기전자산업에서 대기업 주도의 친환경공급망접근방법(SCEM approach)이 중소기업의 환경성과에 미치는 영향에 대하여 실증분석하였다. 연구방법론으로는 설문조사 결과에 대하여 인자분석과 회귀분석을 실시하였다. 계량분석 결과, 대기업 주도의 SCEM이 중소기업의 환경활동촉진에 긍정적인 영향을 미치고 있으며, 특히 친환경공급망접근방법 중에 시장거래(arm's length) 기법보다는 협력적(collaborative) 기법이 더 효과적으로 중소기업의 환경활동 촉진에 기여하고 있다는 점을 제시하였다. 본 연구에서는 다국적 기업의 친환경공급망접근방법 역시 중소기업의 환경활동촉진에 중요한 요인이 되고 있다는 점도 도출하였다.

• 대한산업공학회지
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• 제40권5호
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• pp.451-461
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• 2014

This paper analyzed the degree of perception and performance of technology-humanities convergence in Korean SMEs. First, the meaning and activities of technology-humanities convergence were defined. Second, a survey data was collected from 277 Korean SMEs and analyzed from two perspectives-degree of performance and degree of perceived importance. Finally, based on the results, this paper signposted the important points to activate the technology-humanities convergence in SMEs.

• 지식경영연구
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• 제16권4호
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• pp.1-16
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• 2015

This paper aims to explore the small and medium sized enterprises'(SMEs') technological innovation through an open innovative strategy. Researchers have identified open innovation as external search 'breadth' and 'depth'. Although an open innovation strategy is well known as an effective way for SMEs' innovation, this stream of research examines differences between pursuing breadth of external knowledge and depth of external knowledge for SEMs' innovation. The sample comprises a total of 1106 SMEs included in the Korean Innovation Survey, and logistic regression analysis and odds ratio comparison were used to evaluate the relationship between external knowledge search and innovation outcomes. The results show that both 'breadth' and 'depth' positively affect the SMEs' innovation. When SMEs are simultaneously pursuing external searching for breadth and depth, however, a negative result on innovation outcome followed because of the lack of their internal resources and capacities. Despite these contributions, we have certain limitations that can be regarded as means of future research. Even though breadth and depth are adopted to measure the way of how a firm sources the external knowledge, companies may place the different weight on each source of knowledge. And also, it is difficult to understand how the knowledge gained through external search contributes to a firm's incremental and radical innovation, respectively.

• 한국초전도ㆍ저온공학회논문지
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• 제7권4호
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• pp.24-27
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• 2005

Development of a 600 kJ class Superconducting Magnetic Energy Storage (SMES) system is being in progress by Korea Electrotechnology Research Institute(KERI). High temperature superconducting (HTS) wires are going to be used for the windings for the SMES system is presented in this paper. We considered BSCCO-2223 wire for the HTS windings and the operating temperature of the winding was decided to be 20 K which will be accomplished by conduction cooling method using cyro-coolers. Auto-Tuning Niching Genetic Algorithm was adopted for an optimization method of the HTS magnets in the SMES system. The objective function of the optimal process was minimizing total amount of the HTS wire. As a result, we obtained output parameters for optimization design of 600 kJ class SMES under several constrained conditions. These HTS windings are going to be applied to the SMES system whose purpose is stabilization of the power grid.