• 한국정밀공학회지
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• 제15권12호
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• pp.180-187
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• 1998

The stability and theoretical performance limits of the feedback controlled force reflecting haptic manipulator have been discussed. All the virtual environment which interact physically with the haptic system have its own stable performance limit. Three different realization of the interfaces have been compared using the driving point admittance. The haptic system which is separated from the human hand or finger is superior to its stable interaction provided that there is a means to apply a direct damping between the haptic manipulator and the human finger Electro-magnetic force is used for its digital implementation of the simple separated type haptic device. The stable limits of a virtual wall is calculated and experimental results show that there is performance limits in this implementation.

• 한국생활과학회지
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• 제15권1호
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• pp.1-15
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• 2006

The purpose of this study is (1) to investigate how children's peer interaction type and joint problem-solving performance differ, depending on a partner's age, in such a situation as they are asked to solve problems with their peer and (2) to investigate relationship between children's peer interaction type and joint problem-solving performance. Results reveal that children's problem-solving performance receives more benefit in the interactions with older peers, rather than those with younger ones. It can also be improved by higher level of collaborative interactions such as abstract collaborative explanations in joint activities. It is influenced positively by collaborative interactions, expecially when the children are in the same age groups. Results here were discussed in terns Piagetian and Vygotskian theories.

• 제어로봇시스템학회논문지
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• 제5권5호
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• pp.600-613
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• 1999

This paper focuses on development of a performance manager for IEEE 802.4 token bus networks to serve large-scale integrated systems. In order to construct the management algorithm, the principles of fuzzy logic, genetic algorithm, and neural network have been combined to represent human knowledge and to imitate of human inference mechanism. Through the simulation experiments, it is shown that the proposed performance manager is capable of improving the network performance without a priori knowledge.

• 한국수소및신에너지학회논문집
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• 제22권6호
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• pp.810-818
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• 2011

This paper analyzed the suitability about the isolation performance criteria which was based on human impedance and effect of current in IEC 60479-1 on the safety of human being was examined. The method of evaluation by megger and DC voltmeter was analyzed. The differences of isolation performance according to design of high-voltage system were analyzed. The factors which affect the insulation performance were analyzed for HFCV, EV, HEV, etc. through analysis of the isolation performance evaluation method. Finally, design for improved isolation performance was proposed.

• 무역학회지
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• 제45권2호
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• pp.31-49
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• 2020

The purpose of this study is to investigate the effects of knowledge-based resource and ambidextrous capability on their export performance of small and medium-sized enterprises (SMEs). Drawing on an extensive review of the literature on Knowledge-based resource and ambidextrous capability, hypotheses are developed and tested using a sample of 284 SMEs in South Korea. Structural equation modeling was applied. As a result of analysis, first, international entrepreneurship has a significant effect on ambidextrous capability. Second, human capital has significant influence on ambidextrous capability. Third, ambidextrous capability has a significant effect on export performance. The results indicate that their knowledge-based resources ware significant driver of their ambidextrous capability. and that their ambidextrous capability was significant driver of their export performance. In the final conclusion section, implications and limitations of research results and suggestions for future research are discussed.

• 한국생활과학회지
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• 제21권2호
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• pp.269-284
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• 2012

The main purpose of this study was to investigate factors affecting performance of casual wear franchise stores including franchiser support and social network between owners/managers. The study included the franchise stores of 55 casual wear brands located in Seoul, Incheon and Gyeonggi-do. In each store, one manager, owner or staff member with management responsibility was asked to fill out a questionnaire. A total of 184 questionnaires were collected with 165 used in the final analysis. The results showed that franchiser support consisted of educational support, marketing support and customer support. Path analysis indicated that only the educational support had a significant influence on the franchiser-franchise relationship, and in turn, the franchiser-franchise relationship positively influenced customer performance. Marketing support did not have a significant influence on the franchiser-franchise relationship, but did demonstrate a direct influence on customer performance. Social networks positively influenced customer performance, and there was significant a correlation between regions and social networks on customer performance. Sales performance was significantly influenced by customer performance.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.201-212
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• 2021

This study aims to investigate variables affecting the business performance of Muslim women entrepreneurs in Sri Lanka. A multidimensional analysis was proposed with five potentially defined antecedents of business performance which included psychological characteristics, human capital, social capital, industrial factor, and cultural factor. Data was collected from 286 respondents through the use of a self-administered questionnaire. The results of structural equation modeling indicate that the model meets the goodness-of-fit indices and that generally, all five factors have significant positive relationships with business performance. Amongst the dimensions of psychological characteristics, only risk-taking had a notable effect on business performance. Amongst the dimensions of human capital, two of the three dimensions (business experience and business skills) were significantly associated with business performance; in the case of social capital, one of the two dimensions (non-familial affiliations) was significantly associated with business performance; and in the case of industrial factor, resource accessibility was significantly associated with business performance. A strong positive correlation with business performance has also been demonstrated by the cultural factor which was a new concept to the paradigm as a whole. This study has broadened the understanding of existing literature on Muslim women entrepreneurship and contributed practical implications to government, policymakers and other related agencies, chambers of commerce, the general public, as well as the Muslim women entrepreneurs themselves.

• 대한인간공학회지
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• 제32권2호
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• pp.159-165
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• 2013

Objective: The aim of this study was to predict human performance time in finding objects on multi-display monitors using ACT-R cognitive architecture. Background: Display monitors are one of the representative interfaces for interaction between people and the system. Nowadays, the use of multi-display monitors is increasing so that it is necessary to research about the interaction between users and the system on multi-display monitors. Method: A cognitive model using ACT-R cognitive architecture was developed for the model-based evaluation on multi-display monitors. To develop the cognitive model, first, an experiment was performed to extract the latency about the where system of ACT-R. Then, a menu selection experiment was performed to develop a human performance model to find objects on multi-display monitors. The validation of the cognitive model was also carried out between the developed ACT-R model and empirical data. Results: As a result, no significant difference on performance time was found between the model and empirical data. Conclusion: The ACT-R cognitive architecture could be extended to model human behavior in the search of objects on multi-display monitors.. Application: This model can help predicting performance time for the model-based usability evaluation in the area of multi-display work environments.

• 대한토목학회논문집
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• 제42권5호
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• pp.701-710
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• 2022

본 연구는 대형화되는 건설프로젝트의 성과 달성을 위해 체계적으로 프로젝트 관리를 할 수 있는 PMC의 중요성과 도입의 필요성을 증명하는 연구이다. 이를 위해 구조방정식 모형(SEM) 분석을 통하여 PMC의 역할과 건설프로젝트 성과와의 관계를 분석하여 PMC의 필요성 및 프로젝트 성공의 중요한 요인인 인적자원역량 중 PM리더십과 팀 구성원 역량이 건설프로젝트 성과에 미치는 영향을 파악하였다. 연구결과, PMC는 인적자원역량과 건설프로젝트 성과에 유의미한 영향을 미쳤고, 인적자원역량 또한 건설프로젝트 성과에 유의미한 영향을 미친다는 것을 알 수 있다. 이에 본 연구는 국내 대형 건설프로젝트에 PMC를 도입하고 PM리더십과 팀 구성원 역량을 강화한다면 건설프로젝트를 성공적으로 완공할 수 있음을 시사한다.

• 한국철도학회논문집
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• 제12권5호
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• pp.744-750
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• 2009

기존 연구결과에 따르면, 시스템의 안전성에 가장 큰 영향을 주는 요인 중 하나는 인적수행도의 저하인 것으로 밝혀졌다. 따라서 인적수행도 저하 방지를 통한 사건/사고의 방지는 원자력이나 철도와 같이 안전을 우선적으로 고려해야 하는 산업체의 경우 반드시 고려되어야 하는 조건이다. 이를 위해서는 인적수행도 저감의 원인의 체계적 파악 및 이에 근거한 효과적인 관리가 선행되어야 하기 때문에, 대표적인 인적수행도 저하 원인으로 알려져 있는 직무복잡도를 객관적으로 평가할 수 있는 방법의 개발이 필요하다. 이러한 필요성에 따라, 본 논문에서는 원자력발전소의 절차화된 직무에 대한 복잡도를 평가할 수 있는 TACOM 척도를 사용하여 KTX 기장이 수행해야 하는 운전직무의 복잡도를 정량적으로 평가한 후 그 결과를 주관적 직무부하 평가 방법인 NASA-TLX 결과와 비교하여 적합성을 검증하였다.