• Journal of Korean Vacuum Science & Technology
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• 제6권2호
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• pp.71-75
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• 2002

GaAs polycrystalline thin films with good performance were prepared on conducting glass by hot wall epitaxy (HWE), which were used for solar cell. Electron probe micro-analyzer (EPMA) was applied for the composition, morphology of surface and cross-section of grown films, and X-ray diffraction (XRD) for their phase structure; Raman scattering spectum (RSS) and photoluminescence (PL) were used for evaluating their optical characteristics. The results show that, there is textured structure on the surface of grown GaAs polycrystalline films, which is greatly promised to be suitable for the candidate of solar cell with low cost and high efficiency. It is concluded that the source and substrate at temperature of 900 ~ 930 $\^{C}$ and 500 $\^{C}$ respectively would be beneficial for such films.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.69-72
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• 2007

Cellulose is a beneficial material that has low cost, lightweight, high compatibility and biodegradability. Recently electroactive paper (EAPap) on cellulose base was discovered as a smart material and actuator through ion migration and piezoelectric effect. Furthermore cellulose has a potentiality to apply the display material, because of its high reflectivity, flexibility and high transmittance. The various shapes and height patterns of the Cellulose acetate (CA) solution, such as circle and honeycomb patterns, were fabricated and observed by field emission scanning electron microscope (FESEM, S4300 Hitachi). The resulting pattern showed uniform size in the large area without defect. After stretching the CA film with saponification process in the sodium methoxide in methanol solution, Most of the compositions become one directional ordered nanofibers below 50nm.

• 품질경영학회지
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• 제38권1호
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• pp.101-107
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• 2010

In 2008, a review was made to analyze the effect of the certification of ISO 9001 quality management system in the almost same methods used for a similar review in 2001. Based on the two reviews, this research is to compare and contrast the changes made in between. The results show that the overall satisfaction for the certification has increased over 7 years, along with other beneficial changes, such as decreased cost and increased productivity. However, there has been no significant change in the establishment of the quality management system and in the level of customer satisfaction. ISO 9001 quality management system construction appears which effects variously on the all enterprises management, therefore this is very important strategy for preparing the keen enterprises competition.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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• pp.194-196
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• 2008

우리나라 전력시장은 2001년 4월부터 구조개편 초기모델로 원가반영발전시장(Cost Based Pool)으로 새로운 경쟁적 시장환경이 도입되면서 지역간 연계를 위한 송전망의 확충은 개별 시장참여자뿐만 아니라 다양한 이익주체들에게 경제적 편익에 큰 영향을 미칠 수 있다. 따라서 국내 전력시장 환경에 적합한 송전망 투자의 경제성 평가 절차와 방법을 개발하고 전산모형을 활용하여 실제 계통계획(안)에 적용하여 시장참여자별 경제적 효과를 평가한다.

• Journal of information and communication convergence engineering
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• 제6권4호
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• pp.383-390
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• 2008

Clock skew modeling is important in the performance evaluation and prediction of clock distribution network and it is one of the major constraints for high-speed operation of synchronous integrated circuits. In clock routing synthesis, it is necessary to reduce the clock skew under the specified skew bound, while minimizing the cost such as total wire length and delay. In this paper, a new efficient bounded clock skew routing method is described, which generalizes the well-known bounded skew tree method by allowing loops, i.e., link-edges can be inserted to a clock tree when they are beneficial to reduce the clock skew and/or the wire length. Furthermore, routing topology construction and wire sizing is used to reduce clock delay.

• 한국경영과학회지
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• 제29권3호
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• pp.63-78
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• 2004

This paper deals with a supplier-managed inventory(SMI) control for a two-echelon supply chain model with a service facility and a single supplier. The service facility is allocated to customers and provides a service using items of inventory that are purchased from the supplier, Assuming that the supplier knows the information of customer queue length as well as inventory position in the service facility at the time when it makes a replenishment decision, we identify an optimal replenishment policy which minimizes the total supply chain costs by reflecting these information into the replenishment decision. Numerical analysis demonstrates that the SMI strategy can be more cost-effective when the information of both customer queue length and inventory position is shared than when the information of inventory position only is shared.

• 패션비즈니스
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• 제3권1호
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• pp.138-146
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• 1999

For an enterprise to survive in extremely competitive world, it had better to down budget and resource of unimportant fields so that the enterprise can concentrate resources on the strong field. Nowadays in Korea, it is important to research outsourcing for strengthen the competitive power in apparel maker because of recent depression. The questionnaire was composed of 14 factors about outsourcing effect. The questionnaires were selected for finial analysis 67 apparel makers in Pusan and Seoul and data was analysed by using paired t-test by SPSS program. Almost of apparel makers (85.07%) has been outsourced the sewing process to contractor or vendor. Outsourcing in this case is marked lower effect than insourcing except reducing cost, economy of time and overcoming internal resources. This means that our outsourcing has been progressed with so many risk. If we have research the successful outsourcing and have a strategic vision and plan with vendor and product mutually beneficial relationship, we can share the risk and creating new business synergies through outsourcing.

• 한국식품위생안전성학회:학술대회논문집
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• 한국식품위생안전성학회 1992년도 학술강연회
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• pp.1-5
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• 1992

There is increasing awareness of the devastating socio-economic cost of cardiovascular disease. As a result there have been a lot of extensive researches both on basic mechanisms involved and on the areas of epidemiology and clinical trials. Now, it is being generally accepted that dietary n-3 fatty acids abundant in marine products, may reduce the incidence of cardiovascular disease. Fish oil, with its complement of n-3 fatty acids, has been shown to have diverse and sometimes potent actions on cells of the blood and vasculature, which may explain some of its positive effects on vascular disease. However, the appropriate intake of n-3 fatty acids has not been established. This may vary with desired effects, the duration of ingestion, the type of seafood or fish oil and amount of other fatty acids, especially nf fatty acid being consumed in the diet, Although the beneficial effects have been extensively studied, little is known about potential adverse effects with excessive intake of n-3 fatty acids. Thus, it is needed to study on the possible unfavorable effects including genetic effects.

• 한국식품위생안전성학회지
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• 제7권2호
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• pp.101-105
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• 1992

There is increasing awareness of the devastating socio-economic cost of cardiovascular disease. As a result there have been a lot of extensive researches both on basic mechanisms involved and on the areas of epidemiology and clinical trials. Now it is being generally accepted that dietary n-3 fatty acids abundant in marine products, may reduce the incidence of cadiovascular disease. Fish oil . with its complement of n-3 fatty acids, has been shown the have diverse and sometimes potent actions on cells of the blood and vasculature, which may explain some of its positive effects on vascular disease. However, the appropriate intake of n-3 fatty acids has not been established. This may vary with desired effects, the duration of ingestion, the type of seafood or fish oil and amount of other fatty acids, especially n-6 fatty acid being consumed in the diet. Although the beneficial effects have been extensively studied, little is known about potential adverse effects with excessive intake of n-3 fatty acids. Thus, it is needed to study on the possible unfavorable effects including genetic effects.

• Advances in robotics research
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• 제1권2호
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• pp.171-183
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• 2014

Distributed planning and decision making can be beneficial from the robustness, adaptability and fault tolerance in multi-robot systems. Distributed mechanisms have not been employed in three dimensional transportation systems namely aerial and underwater environments. This paper presents a distributed cooperation mechanism on multi robot transportation problem in three dimensional environments. The cooperation mechanism is based on artificial capital market, a newly introduced market based negotiation protocol. In the proposed mechanism contributing in transportation task is defined as asset. Each robot is considered as an investor who decides if he is going to invest on some assets. The decision is made based on environmental constraint including fuel limitation and distances those are modeled as capital and cost. Simulations show effectiveness of the algorithm in terms of robustness, speed and adaptability.