• 한국윤활학회:학술대회논문집
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• 한국윤활학회 1997년도 제25회 춘계학술대회
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• pp.151-166
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• 1997

ER clutch is a device using ER fluid, so called "intelligent material" and is a controlled system with electric field strength. Current problem of this device is that the temperature of ER fluid increases when ER clutch is operating and affects the performance of ER clutch. This study was undertaken to estimate this performance variation due to temperature increase of ER fluid. Analytic power transmission relationships and the temperature increase model using the rheological model of ER fluid were developed and the dynamic model of proposed ER clutch system was constructed, also. With this relationships, effects of changing geometric, kinetic parameters of ER clutch and ER fluid properties were described and performance variations due to temperature increases of ER fluid were estimated. In conclusion, compared with neglecting temperature increase effects, a performance of ER clutch was very differential. Therefore, to achieve uniform performance of ER clutch, we have to improve thermal stability of ER fluid with a view point of material development and design carefully ER clutch considering temperature increase effects with a view point of mechanical design skill.ign skill.

• 디지털융복합연구
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• 제6권2호
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• pp.77-86
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• 2008

This study investigated how the franchisor's supportive activities influence the franchisee's loyalty and consequently their perceived performance in the franchised restaurants. The study found that the franchisor could increase the franchisee's loyalty through supportive activities and the franchise performance in results. However, the franchisor's advertising and promotion supports did not influence the franchisee's loyalty increase, but increase the franchisee's perceived performance. In summary, supportive activities such as efficient franchise system and advisory activities could be a starting point towards high franchise performance.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.205-218
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• 2020

This study aims to analyze the influence of financial inclusion on micro-, small-, and medium-sized enterprises' (MSMEs) performance and examine the mediation role of financial intermediation and access to capital. The object of this study is MSMEs in Malang, Indonesia. The sample consists of 100 MSME actors in Malang City, which is determined using Roscoes theory. The data is collected using Simple Random Sampling method, by distributing questionnaire measured with Likert scales. The hypotheses proposed in this study are examined using Partial Least Square (PLS) model. The results of this study show that financial inclusion influences MSMEs' performance both directly and indirectly through mediation from financial intermediation and access to capital. The direct influence means that the efforts to increase access to financial services, especially access to credit financing for MSMEs, will be able to increase market share, number of workers, sales, as well as profit of the MSMEs. Increased financial inclusion has a major impact on improving MSMEs' performance through financial intermediation compared to access to capital. This means that the increase of financial access for MSMEs followed by an increase in financial intermediation in the form of a financial service approach to MSMEs will improve MSMEs' performance.

• International Journal of Fluid Machinery and Systems
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• 제9권3호
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• pp.205-212
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• 2016

The performance of a prototype pump converted from that of its model pump shows an increase in efficiency brought about by a decrease in friction loss. As the friction force working on impeller blades causes partial peripheral motion on the outlet flow from the impeller, the increase in the prototype's efficiency causes also a decrease in its input power. This paper discusses results of analyses on the behavior of the theoretical head or input power of a prototype pump. The equation of friction-drag coefficient for a flat plate was applied for the analysis of hydraulic loss in impeller blade passages. It was revealed that the friction-drag of a flat plate could be, to a certain degree, substituted for the friction drag of impeller blades, i.e. as a means for analyzing the relationship between a prototype pump's efficiency increase and input power decrease.

• The Journal of Asian Finance, Economics and Business
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• 제7권4호
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• pp.267-273
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• 2020

The research examines the impacts of empowering leadership on teamwork performance of the employees in sales departments at commercial banks in Vietnam. Based on the data from the sample survey of 406 employees in sales departments of commercial banks in Vietnam, the paper uses various types of statistical methods and assesses the reliability of scales with Cronbach's Alpha, Confirmatory Factor Analysis as well as Structural Equation Modeling for analysis. The results show that the Empowering Leadership factor has a directly positive impact on Knowledge Sharing and Teamwork Performance, which means when the Empowering Leadership is positive, the Knowledge Sharing and Teamwork Performance will increase. In addition, Empowering Leadership also has an indirect impact on Teamwork Performance through Knowledge Sharing factor, which means when the Empowering Leadership is positive, the Teamwork Performance will increase. Moreover, Knowledge Sharing factor has a directly positive impact on Teamwork Performance, which means when the Knowledge Sharing factor is positive, the Teamwork Performance will increase. The findings suggest that Empowering Leadership has both directly and indirectly positive influence on Teamwork Performance. Moreover, Empowering leadership has a directly positive impact on Knowledge-sharing while Knowledge-sharing has a directly positive impact on Teamwork Performance of sales departments of commercial banks in Vietnam.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.495-503
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• 2021

Business leaders have made great efforts to increase their organizations' competitive capability, and raising employees' job performance is considered as one of the essential solutions. Thus, it is vital to properly identify factors that affect the job performance since this will be the basis for managers to propose recommendations to increase employees' job performance. The study seeks to investigate the relationships between psychological capital, job satisfaction, and job performance of employees in Vietnam, a developing country in South-East Asia. In this study, psychological capital is considered as a high-order construct. The mixed research method is used in this study. Qualitative research method is used to form the official survey questionnaire. Quantitative research method is used for investigating the relationships between concepts. Research data are collected from 848 interviewees via both face-to-face and email surveys. The findings show that psychological capital has positive relationships with job satisfaction and job performance. Job satisfaction also has a positive impact on job performance. In particular, job satisfaction shows the mediating role in the impact of employees' psychological capital on their job performance. Based on the results, the study also provides recommendations related to psychological capital and job satisfaction assisting managers to increase employees' job performance.

• 한국추진공학회지
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• 제2권2호
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• pp.47-55
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• 1998

중형항공기용 터보팬엔진의 설계점, 탈설계점에 대한 정상상태 및 천이상태 성능해석을 수행하였다. 정상상태 성능해석은 설계점으로 선정한 지상최대추력조건과 탈설계점으로 선정한 최대상승조건과 순항조건에서 수행하였으며 부분부하 성능해석 결과 저압압축기 회전속도 90％RPM에서 가장 연료소모율이 적어 경제적임을 확인하였다. 천이상태 성능해석은 각각의 비행조건에서 연료의 Step증가, Ramp증가, Ramp감소, Step 증가 후 Ramp 감소의 경우에 대하여 수행하였다. 천이상태의 성능해석을 위해서는 압축기와 터빈의 일에 대한 조합이 필요한데, 일의 조합방정식에 포함된 잉여 토오크의 적분에는 Modified Euler Method를 적용하였다. 천이상태 성능해석 결과, 모든 비행조건에서 Step 및 Ramp 증가의 경우 고압압축기의 터빈입구온도가 제한온도를 초과하며, 최대상승조건에서 연료를 Step 또는 5.5초 이내의 Ramp 증가시킬 경우 고압압축기에서 실속이 발생함을 확인하였다.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.687-696
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• 2021

This paper investigates the effect of environmental performance and environmental management on firm value using financial performance as mediation variable. There are still inconsistencies in research on environmental performance and environmental management and their impact on company value. This research used a quantitative approach involving secondary data. The variables used are environmental performance, environmental management, company financial performance, and company value. Multiple regression was used because it allowed the researchers to examine the relationship of each variable contained in the research framework by describing all of the direct effects (non-mediated effects) and the indirect effects of the research variables. The research sample consisted of 144 manufacturing companies listed on the Indonesia Stock Exchange from 2012 to 2017. Statistically, this study found that there was no direct effect that had a significant impact on environmental performance and firm value, and found that there is a significant direct effect of environmental management variables on firm value. Improved environmental management by the company is proven to increase the value of the company directly. This paper found that, not only does an increase in stakeholder trust happen when a company increases its environmental awareness, but there is also an increase in the financial aspects of the company.

• 정보통신설비학회논문지
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• 제11권2호
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• pp.46-51
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• 2012

In this paper deperm performance on deperm protocol cycle has been analyzed. As deperm protocol increases cycle, deperm performance improves and duration time will increase. Thus, it's essential that proper deperm cycle that is fit on vessel should be applied. To compare deperm performance according to cycle changes, small deperm system has been made and small vessel had been made with SM45C materials. As Anhysteretic deperm protocol applied, the result on the increase of deperm performance according to the increase of cycle has been gotten.

• 한국수소및신에너지학회논문집
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• 제19권6호
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• pp.467-473
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• 2008

This study is to investigate the influence of catalyst loading quantity on the direct methanol fuel cell (DMFC) performance. In this paper, Pt-Ru and Pt-black loading as the catalyst were varied from 1 to $4mg/cm^2$ at the anode and cathode, respectively. The experiment was conducted with single fuel cell consisted of $5cm^2$ effective electrode area, serpentine type flow pattern and Nafion 117 membrane. Also, AC impedance and methanol crossover current were measured to investigate the performance loss precisely. As a result, the performance of fuel cell was significantly increased with the increase of cathode catalyst loading. However, the performance did not increase further above a certain Pt-Ru catalyst loading as the increase of anode catalyst loading.