• Journal of Energy Engineering
• /
• v.8 no.4
• /
• pp.592-604
• /
• 1999

The steady state and dynamic characteristics of large cell area MCFC stacks were analyzed to solve the problems such as temperature difference generated in stacks and pressure difference between anode and cathode. Manipulated variables (current density, duel utilization rate, oxidant utilization rate) and controlled variables (temperature difference, anode and cathode pressure difference) which had an important effect on the MCFC stack performance were determined using operation results of two types of MCFC stacks (5kW (3,000 $\textrm{cm}^2$, 20 ea). 3kW (6,000 $\textrm{cm}^2$, 5ea)). The stability and transfer function representing system dynamics were obtained by steady state gain rate which showed the relative change between MVs and CVs. The transfer function was a 3$\times$3 matrix and a typical first order system without time delay. The optimal operating condition of large cell area MCFC stacks could be determined by analyzing dynamic characteristics. In case of a 5 kW MCFC stack, pressurized operation with recycle flow should be used to control the outlet temperature less than 68$0^{\circ}C$ and to control the MCFC system effectively. MIMO control or decoupler should be used to remove the interaction between MVs and CVs. This result will be used as important data in determining the control structure design and operation mode of large cell area MCFC systems in the future.

• Journal of Digital Convergence
• /
• v.19 no.8
• /
• pp.113-132
• /
• 2021

This study is about the factors affecting organizational effectiveness and to suggest implications for encouraging organizational effectiveness. The conditional process model was analyzed with transformational leadership as an independent variable, educational service quality as a mediator, organizational effectiveness as a dependent variable, and trust as a moderator. The data collected from the financial institutions were analyzed using SPSS v22.0 and PROCESS macro v3.4. As a result, transformational leadership has a (+) effect on educational service quality, and educational service quality has a (+) effect on organizational effectiveness. Except for the relationship between charisma and innovative behavior, transformational leadership affect organizational effectiveness. Excluding the relationship between charisma and innovative behavior, educational service quality mediate between transformational leadership and organizational effectiveness. Trust only moderates between educational service quality and innovative behavior. Trust moderated the mediating effect of educational service quality between transformational leadership and innovative behavior. The results suggest the importance of education service quality management in a non-face-to-face working environment and the importance of individual consideration in innovative actions.

• Information Systems Review
• /
• v.23 no.3
• /
• pp.177-200
• /
• 2021

Recently, the use of prepaid electronic payments such as electronic wallets, digital currency and prepaid points is gradually increasing. Prepaid electronic payments has the characteristic of being used after charging first. This study empirically investigated the factors affecting the intention to use online charging in order to help improve the service that require prepaid recharge by applying transformed TAM. Since there are not many previous studies for the intention to use online charging, we extract factors through preceding researches for electronic cash and mobile easy payment. Also we analyze the intention to use online charging for transportation card users, focusing on the moderating effects. As a result of the study, it was found that 'convenience', 'ubiquity', and 'self-efficacy' among the independent variables had a positive (+) effect on mediation variable 'perceived usefulness'. 'Perceived usefulness' was analyzed to have a significant influence on the dependent variable 'usage intention'. According to users' gender, internet usage time, internet shopping frequency, online charging frequency and transportation card usage type, the moderating effect was significant on 'perceived usefulness' and 'usage intention'. As an implication, it was suggested that service improvement and differentiated marketing are needed in direction of increasing the usefulness of services. Additional research directions were proposed for services such as e-wallets, prepaid points and digital currencies by adding other factors and moderate variables.

• Journal of Science and Technology Studies
• /
• v.6 no.1 s.11
• /
• pp.53-88
• /
• 2006

This study has the purpose to make a conceptual model which can explain the relationship between the research performance, and the fitness of environmental property and the technology development strategy. The environmental property consists of the competitiveness, the complexity of environment, and the market growth. The technology development strategy consists of the innovativeness of technology, the upgrade of product, and the usage of the out resource. And the ability to manage knowledge resource is a very important variable which can modulate the fitness of environmental property and the technology development strategy.

• Journal of the Korea Convergence Society
• /
• v.8 no.10
• /
• pp.215-223
• /
• 2017

This article has tried to analyse the effect of the corporate earning return tax empirically through analysis on the impact of previous internal reservation on the dividends rate of the current year. In addition to this, this article has tried to the effectiveness of government policies with leverage ratio as a moderating variable. Moreover, DRF and GBM model were used to see the effect again. As a result of the actual proof analysis, OCF, ROE, FOR have a significance level of 99% in model1, model2, model3. However, ADV and MSE has appeared not to be meaningful in all models. In the result of DRF and GBM model for convergence was higher than GBM in depth and leaves. However, when it comes to a model explaining capability, GBM high than DRF. The further study will be required to examine the effect of government policy by time series analysis in the period of enforcement of the reflux tax, from 2015 to 2017.

• Journal of Digital Convergence
• /
• v.20 no.5
• /
• pp.187-195
• /
• 2022

The demand for non-contact service has increased a lot along with the development of technology and the generalization of social distancing to prevent COVID-19 spread during the pandemic. This study analyzed mediator and moderating variables between digital literacy and intention of continuous use of non-contact service were identified. The result showed that digital literacy had a significant influence on intention of continuous use of non-contact service. In particular, self-efficacy and satisfaction played a moderating role in the relation between digital literacy and intention of continuous use of non-contact service. This study is intended to contribute to expanding the base of non-contact service by verifying whether satisfaction and self-efficacy played important mediator variables in the relation between digital literacy and intention of continuous use of non-contact service

• The Journal of the Convergence on Culture Technology
• /
• v.10 no.3
• /
• pp.279-288
• /
• 2024

With the development of ICT, the use of software has become essential for organizations to exchange information or manage operations. However, security and software management issues that have increased with the development of ICT are issues that need to be continuously addressed. In 2021, the U.S. government has standardized and established SBOM as one of the countermeasures for software security. This research was initiated as a study to lay the groundwork for the introduction of SBOM in Korea. Based on the effects of SBOM characteristics on adoption intention, we tested management support and institutional support as moderating variables. As a result, security management was found to be a significant moderating variable for management support, and transparency was found to be a significant moderating variable for government institutional support. This study verified that SBOM adoption requires both corporate and government efforts, and the variables that are important from each perspective are different. We hope that this study will contribute to the development and adoption of SBOM.

• The Journal of the Korea Contents Association
• /
• v.13 no.10
• /
• pp.347-355
• /
• 2013

The purpose of this study was to investigate the mediating effect which may operate within peer attachment as well as any links which may exist ego-resilience and life satisfaction and self-regulation learning ability in adolescence. The participants in this research consisted of 2,351 middle school students. the main result were as follows: first, each of three ego-resilience and peer attachment had an influence upon life satisfaction and self-regulation learning ability albeit in different ways. second, life satisfaction had a direct influence on self-regulation learning ability. third, the mediating effect of life satisfaction between ego-resilience and peer attachment upon and self-regulation learning ability were significant. finally, the limitation of this study were discussed along with suggestion for further research.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.7 no.1
• /
• pp.57-66
• /
• 2012

This paper analyzes the relationships between knowledge-centered culture, learning process, and knowledge/learning outcomes. Knowledge management researches have emphasized the important role of a knowledge-centered culture in venture business. After a literature review, research model is developed and the research hypothesis is made. And then, the hypothesis is tested using regression analysis with data collected from venture firms. The results of the empirical study show that cooperative learning does not strengthen the knowledge outcomes on the autonomy and organizational climate of knowledge-centered culture.

• Proceedings of the Korea Technology Innovation Society Conference
• /
• 2017.11a
• /
• pp.387-412
• /
• 2017

우리나라의 중소기업은 국가경제의 근간을 이루고 있으며, 고용창출, 기술혁신, 산업의 다양성 등 여러 측면에서 국민경제 발전에 있어서 실질적인 원동력이 되고 있다. 이로 인해 중소기업은 기술혁신을 통해서 혁신역량을 확보하는 것이 더욱더 중요해졌으며, 내부자원의 한계로 인해 경영에 필요한 다양한 정보와 여러 가지 도움들을 외부와의 협업과 다양한 네트워크 활동을 통해 습득해 나가고 있다. 더 나아가서 시장기회를 포착하고 조직 성장을 위한 수단들을 모색하기 위한 수단으로 기업가 정신 또한 필요하다. 본 연구는 ICT중소기업의 기업성과에 영향을 미치는 요인에 있어 기업가 정신과 기업의 혁신역량이 어떠한 영향을 미치는지 알아보고자 했으며, 사회적 자본이 기업가 정신과 기업성과 간의 조절역할을 하는지 살펴보고자 1,200개 기업을 대상으로 실증 분석을 했다. 분석 결과를 요약하면 다음과 같다. 첫째, 기업가 정신은 기업성과에 유의미한 영향을 미치는 것으로 확인됐으며, 사회적 자본 변수가 기업가 정신과 기업성과 간의 조절효과가 있다는 것을 확인할 수 있었다. 둘째, 혁신 역량이 기업성과에 유의미한 영향을 미치는 것으로 나타났으며, 또한 사회적 자본 변수가 조절효과를 한다는 것을 확인할 수 있었다. 이러한 연구 결과를 통해, 기업가 정신이 기업성과에 영향을 미치는데 있어서 사회적 자본이 중요한 역할을 하고 있다는 것을 확인할 수 있었다.