• Fire Science and Engineering
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• v.24 no.3
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• pp.106-112
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• 2010

This study carried out the motion analysis of auto closing systems as basis study for development of auto closing systems for door in smoke control zone. This study established process of auto closing systems and analysis theory based on kinematics mechanism thesis and mechanism modelling of auto closing control units. And this study established engineering data construction and a source technology that can design each element of auto closing control units that choose closing force units through motion analysis simulation based on analysis theory. Therefore, it can give flexibility and elasticity of auto closing units development from this study. Also, it sees that can ready control means and technological countermeasure of smoke by development of auto closing units and secure high reliancity and stability of smoke control systems.

• 한국벤처창업학회:학술대회논문집
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• 2020.11a
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• pp.121-126
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• 2020

본 연구는 농산업 종사자를 대상으로 통합기술수용이론 기반의 기술수용요인이 인지된 혜택과 농업드론서비스 사용의도에 어떤 영향을 미치는지를 살펴보고자 하였다. 전국에 거주하는 농산업 종사자를 대상으로 수집된 324부를 자료분석에 사용하였다. SPSS v22와 PROCESS macro v3.4를 사용하여 분석한 결과 첫째, 기술수용요인은 노력기대와 실용적 혜택 간의 관계를 제외하고 인지된 혜택에 유의한 영향을 미치고, 농업드론서비스 사용의도에는 모두 유의한 영향을 미치는 것으로 나타났다. 또한, 인지된 혜택은 사용의도에 유의한 영향을 미치는 것으로 나타났다. 둘째, 경제적 혜택은 성과기대를 제외한 기술수용요인과 사용의도 간을 매개하고, 편의적 혜택은 사회적 영향을 제외한 기술수용요인과 사용의도 간을 매개하는 것으로 나타났다. 반면에 실용적 혜택은 기술수용요인과 사용의도 간을 매개하지 않는 것으로 나타났다. 셋째, 조절변수인 혁신저항은 편의적 혜택과 사용의도 간의 영향력만 조절하는 것으로 나타났다. 본 연구는 농업드론서비스의 활용성을 높이기 위한 시사점을 제시하였다는데 의의가 있다. 향후 농업이나 드론 관련 교육 이수자 또는 드론자격증 소지자를 대상으로 실증분석이 필요하며 조사대상도 지역별로 균등하게 조사할 필요가 있다. 또한 사용의도에 영향을 미칠 수 있는 다른 변인들을 추가하는 후속연구가 필요할 것으로 판단된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.69-76
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• 2016

As the number of SNS users increases, so does their self-disclosure. This study examined the factors affecting self-disclosure based on Social Capital Theory and Regulatory Focus Theory. The (extent of self-disclosure by users/number of users disclosing themselves) in SNSs is expected to differ depending on their social capital (bonding capital vs. bridging capital) and regulatory focus (promotional vs. defensive). As a result of this study, it is found that bridging capital is positively related to self-disclosure in profile and in conversation, while bonding capital is positively related to self-disclosure only in conversation. With regard to regulatory focus, promotional orientation has a significant effect on self-disclosure in profile and in conversation, while defensive orientation is negatively related to self-disclosure in profile, but not related to self-disclosure in conversation. Promotional orientation is found to moderate the effect of bridging capital on self-disclosure.

• International Commerce and Information Review
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• v.15 no.2
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• pp.129-162
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• 2013

The purpose of this work is to explore the role of international entrepreneurship(IE) in explaining internationalization process of Korean ventures and to structure the model of IE with the logics of effectuation. The internationalization of entrepreneurial company is regarded as the realization of entrepreneurship which find out and use opportunities across borders in this point of view, and the realization process gets more realistic and applicable to the internationalization of ventures by effectuation. So we constructed the new concepts of the generating-internationalization-outcome capability(GIOC), which is the effectual capability allowing ventures to go international despite their lack of internal resources and experiences. Its sub-capabilities of GIOC are extemporaneous coping capability, perform-resource-in-hand capability and network-use capability. The empirical analyses of the relations among the capabilities and the performances of internationalization are performed in order to prove the rationale of the model, which provides finally significant evidences of the relationships. The key contribution of this study is that it highlights the important role of IE in internationalization of ventures and shows the possible role of effectuation in explaining the realization process of IE.

• Korean Journal of Logic
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• v.18 no.1
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• pp.83-133
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• 2015

In this paper, I pose a problem for Hitchcock's arguments for two concepts of effects that are intended to explicate double causal effects, and put forth a theory that is intended not just to meet the problem but also to accommodate Hitchcock's theory and Eells' theory both. First, I introduce an example of dual causal effects, and examine the accounts of Otte(1985) and Eells(1987) on how to explicate the dual effects. I show that their accounts of the dual effects help us understand the problem of dual effects and see how different it is for Cartwright(1979, 1989, 1995), Eells(1991, 1995), and Hitchcock(2001a) to meet the problem. Second, I introduce two concepts of effects on Hitchcock(2001a), that is, net effect and component effect that are allegedly analogous to two effects of structural equation model. Third, I reveal the significance of homogeneous subpopulation and causal interaction regarding the problem of dual effects while examining Cartwright's theory and Elles' theory. Fourth, I critically examine the two concepts of effects on Hitchcock and argue against Hitchcock's criticism of Eells' theory. Fifth, I take a moderator variable of structural equation model and a moderator effect into the probabilistic theory of causality, and formally generalize causal interaction due to the dual effects in terms of disjunctive relation and counterfactual conditionals. I expect my account of disjunctive relation and counterfactual conditionals to contribute not just to several problems the received theories of causal modelling confront but also to the structural equation models many people exploit as a promising statistical methodology.

• Journal of the East Asian Society of Dietary Life
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• v.21 no.3
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• pp.438-450
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• 2011

The purpose of this research was to investigate the impact of brand prestige on luxury marketing variables (patrons' perception of well-being, favorable inequity, affective commitment, and dedicational behaviors) in the luxury restaurant industry. Based on a thorough literature review, the clear definitions of each construct were established and theoretical causal relationships between the seven constructs were proposed (brand prestige, perception of well-being, favorable inequity, affective commitment, enhancement, advocacy, and brand consciousness). During this process, the moderating role of brand consciousness was also suggested. Integrating the proposed theoretical hypotheses, a structural model was created. This model was tested using the data collected from 527 luxury restaurant patrons in the United States. Data analysis revealed that brand prestige is a key determinant of favorable inequity and patrons' perception of well-being, thereby inducing two types of dedicational behaviors (enhancement and advocacy). More importantly, during this process, brand consciousness played a moderating role in the relationship between brand prestige and patrons' perception of well-being. Based on the data analysis results, the theoretical/practical implications were discussed.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.145-157
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• 2020

The purpose of this study is first to analyze the effects of university students' autonomous motivations to start a business on their attitude toward entrepreneurship, subjective norms, and perceived behavioral control, second to analyze the effect of university students' attitude toward entrepreneurship, subjective norms, and perceived behavioral control on entrepreneurship intentions, and third to analyze the moderating effect of entrepreneurship education for university students on entrepreneurship intention. Based on the previous research, a research model and a research hypothesis were established. 251 questionnaire responses were collected through a survey of university students in Seoul and Gyeonggi Province and empirical analysis was performed using SPSS 24 and AMOS 23. As a result of the analysis, first, the autonomous motivation was found to have a positive effect on attitude, subjective norms, and perceived behavioral control. In addition, attitude, subjective norms, and perceived behavioral control all showed a positive effect on entrepreneurship intention. Entrepreneurship education for university students was found to control the effect of subjective norms on entrepreneurship intention and the effect of perceived behavioral control on entrepreneurship intention in the positive direction. The results of this study can contribute to the establishment of more effective educational policies and startup support program planning that can increase the entrepreneurial intention of university students.

• Knowledge Management Research
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• v.25 no.2
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• pp.49-68
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• 2024

Increasing concerns regarding personal data privacy have complicated the acquisition of customer data through online marketing. This study investigates factors influencing customers' willingness to disclose information via a generative AI-based chatbot. Drawing on privacy calculus theory and regulatory focus theory, we explore how customer regulatory focus and familiarity with the generative AI-based chatbot shape disclosure intentions. Our study, involving 473 participants, reveals that low familiarity with the chatbot leads individuals with a prevention focus to perceive higher privacy risks and lower perceived usefulness compared to those with a promotion focus. However, with high familiarity, these differences diminish. Moreover, individuals with a promotion focus show a greater inclination to disclose information when familiarity with the generative AI-based chatbot is low, whereas this regulatory focus does not significantly impact disclosure intentions when familiarity is high. Perceived privacy risks mediate these relationships, underscoring the importance of understanding familiarity with the generative AI-based chatbot in facilitating personal information disclosure.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.229-230
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• 2016

기존 자가발전 운동기구용 컨버터의 경우, 운동레벨을 조절하기 위한 입력임피던스 조절기능이 없거나, 조절기능을 추가하는 경우 복잡한 topology를 동반되는 경우가 일반적이다. 또한 복잡한 회로를 추가하게 되면 회로의 전체적인 부피가 증가하고, 원가가 상승할 뿐만 아니라, 회로의 신뢰성도 현저하게 저하시키는 등 회로 상용화를 어렵게 만든다. 본 논문에서는 입력 전압 및 전류 제어 방식을 이용하지 않고, 컨버터 구조 자체로 입력 임피던스를 제어하는 방식을 제안한다. 제안 방식은 입력전압, 입력전류 두 가지의 제어를 실행하지 않음으로써 복잡한 피드백 제어 단의 삭제가 가능하며, 이를 통해 회로의 높은 신뢰성 및 부피, 원가 감소 효과를 얻을 수 있다. 본 논문에서는 Flyback 컨버터를 이용하여, 이론적 특성 분석과 200W급 시작품을 통한 실험적 분석을 통해 그 타당성을 검증한다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2179-2181
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• 2004

Model-free Method들 중에 반복 피트백 조절 알고리즘(Iterative Feedback Tuning, IFT)는 특정한 성능지수를 정의하고, 이를 최소화하도록 제어기의 게인들을 조절하는 방법을 제시하였다. PID와 같은 고전적인 제어이론에 근거한 제어기 설계 과정과는 달리, IFT 알고리즘은 반복 실험을 통해 성능지수의 Gradient를 구하여 이로부터 필터 게인들 조정하는 방법을 채택하고 있다. 수학적 증명과 실험적 실증을 통하여 IFT의 수렴성과 유용성이 보여짐에도 불구하고 IFT 알고리즘의 한계점은 단일 성능지수의 사용이라는데 있다. 이를 개선하기 위해서는 단일 제어 목적을 위한 단일 성능지수의 사용이 아닌 복수의 제어 목적을 위한 복수의 성능지수의 사용이 필요하다. 본 논문에서는 두 개의 성능지수를 가지는 IFT를 이용해서 위상 여유가 크고, 대역폭이 넓은 제어기를 설계하기 위해서 제어기 게인을 자동 조절하는 알고리즘을 제안하고 ODD에서 사용되는 플랜트에 적용한 모의실험을 통하여 그 유용성을 보였다.