• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2246-2248
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• 2001

This paper presents a new vector control scheme for induction motor. An exact knowledge of the rotor flux position is essential for a high-performance vector control. The position of the rotor flux is measured in the direct schemes and estimated in the indirect schemes. Since the estimation of the flux position requires a priori knowledge of the induction motor parameters, the indirect schemes are machine parameter dependent. The rotor and stator resistance among the parameters change with temperature. Variations in the parameters of induction machine cause deterioration of both the steady state and dynamic operation of the induction motor drive. Several methods have presented to minimize the consequences of parameter sensitivity in indirect scheme. In this paper, new estimation scheme of rotor flux position is presented to eliminate sensitivity due to variation in the resistance. The simulation is executed to verify the proposed vector control performance and to compare its performance with that of indirect and direct vector control.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 추계학술대회 논문집
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• pp.680-687
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• 2000

In this paper we present a new vector control scheme for induction motor. An exact knowledge of the rotor flux position is essential for a high-performance vector control. The position of the rotor flux is measured in the direct scheme or estimated in the indirect schemes. Since the estimation of the flux position requires a priori knowledge of the induction motor parameters, the indirect schemes are machine parameter dependent. The rotor resistance and stator resistance among the parameters change with temperature. Variations in the parameters of induction machine cause deterioration of both the steady state and dynamic operation of the induction motor drive. Several methods have been presented to minimize the consequences of parameter sensitivity in indirect scheme. In this paper new estimation scheme of rotor flux position is presented to eliminate sensitivity due to resistance change with temperature. Simulation results are used to verify the performance of the proposed vector control scheme.

• Asia pacific journal of information systems
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• 제15권2호
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• pp.23-49
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• 2005

Recently, owing to the rapid growth of the Internet and information technology, the growth of the Internet shopping mall has been truly phenomenal. In the Internet shopping mall, as the customers can't touch a product directly, trust is important factor in purchasing intention. Many researchers proposed direct relationship between the customer trust and the purchasing intention. We supposed that there would be some factors that could be the consequences of trust in on-line purchasing decision, and the factors could be also the determinants of purchasing intention and decision for the Internet shopping mall customers. We found out that there were indirect relationship between them through the customer's attitude, involvement, and royalty to the site rather then directly related. Particularly, the correlation between the site attitude and the purchasing intention was high, but the direct effect was not significant. The site attitude was indirectly related to the purchasing intention through the customer involvement and loyalty. This means that the customer relationship involvement and loyalty enhancement strategies are more important for the success of Internet shopping mall.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.2371-2373
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• 2000

This paper presents a new vector control scheme for induction motor. An exact knowledge of the rotor flux position is essential for a high-performance vector control. The position of the rotor flux is measured in the direct scheme and estimated in the indirect schemes. Since the estimation of the flux position requires a priori knowledge of the induction motor parameters, the indirect schemes are machine parameter dependent. The rotor and stator resistance among the parameters change with temperature. Variations in the parameters of induction machine cause deterioration of both the steady state and dynamic operation of the induction motor drive. Several methods have presented to minimize the consequences of parameter sensitivity in indirect scheme. In this paper, new estimation scheme of rotor flux position is presented to eliminate sensitivity due to variation in the resistance. The simulation is executed to verify the proposed vector control performance and to compare its performance with that of indirect vector control.

• 동남아시아연구
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• 제21권2호
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• pp.217-261
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• 2011

This study is an attempt to construct a basic framework of analysis about China's political and economic influence on Southeast Asia through traditional Sinocentrism, anti-colonial nationalism, Cold War socialism and post-Cold War capitalism. As to the historical status of Southeast Asia vis-a-vis external forces such as India, China and the West, the colonial discourse tends to put excessive emphasis upon its dependence, and the posy-colonial discourse upon its autonomy. However, this study elucidates the political and economic interactions between China and Southeast Asia in a dynamic perspective, focusing on their reciprocal interactions beyond the essentially static dichotomy of autonomy and dependence. Chinese influence on Southeast asia can be divided into active and reactive one, with the former referring to direct and intended consequences and the latter to indirect and unintended consequences. In the historical process of active and reactive influence, both China and Southeast Asia were fundamentally proactive actors. Thus, the autonomy or dependence of Southeast Asia is just a question of relative one, with its actual extent and degree varying with specific spatial and temporal conditions.

• Asia pacific journal of information systems
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• 제12권3호
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• pp.45-70
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• 2002

This paper examines the role of distance learning self-efficacy, belief in one's capabilities of using a system in the accomplishment of web-based distance learning, in predicting user intention to use and performance of distance learning system. It used self-efficacy theory and technology acceptance model(TAM) to build a model that predicts relationships between antecedents to students' distance learning self-efficacy assessments and their behavioral and attitudinal consequences. The model was tested using LISREL analysis on the sample of 250 students who have worked with the Distance Learning System. The results indicated partial support for the conceptual model. In accordance with TAM, perceived usefulness had strong direct effects on intention to use and performance, while perceived ease of use had both direct and indirect effects on intention to use, but not performance. Distance learning self-efficacy had only direct effect on perceived ease of use to use. Computer experience was found to have a strong positive effect on distance learning self-efficacy, and computer anxiety had a negative effect on distance learning self-efficacy. Implications of these findings are discussed for researchers and practitioners.

• 마케팅과학연구
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• 제16권3호
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• pp.61-86
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• 2006

연구는 서비스산업에서의 고객만족 형성요인과 그 이후의 브랜드선호도 및 재구매의도와의 인과관계에 대한 종합적 모형을 제시하고 구조적 관계를 분석하는 것이 주요한 목적이다. 실증분석 결과 기존 연구와 같은 맥락으로 지각된 품질과 지각된 가치가 고객만족에 정(+)의 영향을 미치는 것으로 나타났으나 지각된 공평성의 경우는 그 영향력이 통계적으로 무의미하게 나타났다 고객만족과 브랜드선호도 및 재구매의도의 매개변수로 투입된 전환비용과 고객애호도간의 구조적 인과관계도 모두 유의한 것으로 확인되었고 직접적인 영향뿐만 아니라 간접적으로 영향관계가 존재함을 알 수 있었다. 재구매의도의 형성에 관한 연구가설에서는 기존의 연구들과는 달리 고객만족이나 전환비용이 직접적 인과관계를 형성하지 않는 것으로 나타났다. 다만, 브랜드선호도를 통한 재구매의도의 직접적인 영향관계는 유의한 것으로 확인되었다. 실무에서 중시하는 브랜드선호도가 소비자의 지속적 반복의도를 형성하게 하는데 중요한 매개역할을 수행함을 알 수 있었다. 연구모형의 분석에 따른 실증결과를 바탕으로 서비스산업에서의 소비자의 고객만족 형성 이후 반복구매 가능성의 증대를 위한 효과적 전략방안을 모색해 보고자 한다.

• 아동학회지
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• 제28권6호
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• pp.135-154
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• 2007

This study examined preschool children's conceptions of social situations and mothers' responses toward their children in the home context. Participants were 78 kindergarten children and their mothers living Seoul, Korea. Results indicated that children did not distinguish social-conventional situations from moral situations, but they clearly distinguished social-conventional and moral situations from personal situations. Mothers' reported that they would make indirect responses to children's behaviors in moral situations to highlight intrinsic consequences such as violating others' rights and happiness. In contrast, they said that they would make direct responses such as mentioning rules and manners in social-conventional situations. Mothers supported their children's choices in personal situations unless the situations were dangerous or detrimental to children's health.

• Earthquakes and Structures
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• 제12권1호
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• pp.47-54
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• 2017

Introduction of robustness index in the structure is done in three ways: deterministic robustness index, probabilistic robustness index, and risk-based robustness index. In past decades, there have been numerous researches to evaluate robustness index in both deterministic and probabilistic ways. In this research, by using a risk analysis, a risk-based robustness index has been defined for the structure. By creating scenarios in accordance with uncertainty parameters of critical and unexpected gas blast accident, a new method has been suggested for evaluating risk-based robustness index. Finally, a numerical example for the evaluation of risk-based robustness index of a four-storey reinforced concrete moment frame, designed and built based on Eurocode 8 code, has been presented with results showing a lower risk of robustness.

• 한국산학기술학회논문지
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• 제9권6호
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• pp.1856-1868
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• 2008

본 연구는 최근 들어 부각되고 있는 문화마케팅이 기업윤리와 사회적 책임의 조절효과를 중심으로 기업이미지와 브랜드자산형성에 어떤 영향을 미치고, 문화마케팅이 기업이미지와 브랜드자산을 형성하는 각 유형들 중 어느 부분에 더 밀접한 영향을 주는지에 대한 연구이다. 연구 결과는 다음과 갈다. 첫째, 문화 마케팅활동은 기업브랜드 자산에 간접적인 영향을 미쳤다. 둘째, 문화 마케팅은 기업브랜드 이미지에 직접적인 영향을 미쳤다. 셋째, 문화마케팅은 브랜드연상 이미지에 긍정적인 영향을 미쳤다. 넷째, 사회적 책임과 기업윤리는 브랜드 충성도에 간접적인 영향을 미쳤다. 다섯째, 기업의 사회적 책임과 기업윤리는 브랜드 이미지에 긍정적인 영향을 미쳤다. 여섯째, 기업의 사회적 책임 중 지역사회 활동은 조절변수 역할을 했다. 일곱째, 응답자의 일반적 특성에 따라 기업의 마케팅, 사회적 책임 및 윤리의식, 브랜드 자산에 대한 인식의 차이를 보였다. 위의 결과를 요약해보면 문화마케팅은 기업이미지라는 매개체를 통하여 기업의 브랜드자산 형성에 간접적인 영향을 미치고 있음을 규명할 수 있었다. 이 연구결과는 기업들이 문화마케팅이 가지고 있는 특성과 매체와의 적절한 조화, 지속적이고 장기적인 계획, 브랜드자산 유형과의 연계성을 감안한 전략적 마케팅계획수립의 중요성을 암시해 주고 있다. 또한 상품과 서비스의 생산 및 제공이라는 기업의 경제적 활동이 경제적 결과만을 가져오지 않고 부의 편재, 정경유착 문제, 소비자 안전문제, 공해문제 등의 부정적인 사회적 결과를 가져온다고 인식됨에 따라 경제적 기능으로 한정되는 기업의 역할에 대한 반성을 일게 했다. 이러한 반성으로부터 나타난 것이 기업의 사회적 역할, 즉 기업의 사회적 책임이며, 기업윤리의 실천을 동시에 조화롭게 추구하도록 요청받게 된 것을 확인할 수 있었다.