• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.518-518
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• 2012

공정 수율 향상을 위한 웨이퍼의 대면적화는 공정 반응용기의 부피변화를 수반한다. 반응용기의 부피가 커지면 플라즈마 내의 전자와 이온이 손실되는 면적이 증가하게 되고, 그 결과 공정결과에 직접적으로 영향을 미치는 전자온도와 전자밀도가 떨어지게 된다. 이렇게 변화된 플라즈마 변수들을 원래의 값으로 되돌리기 위해서는 인가전력, 실험압력, 유량과 같은 외부변수들이 조절되어야 하는데, 공간 평균 모델(global model) 식을 이용하여 외부변수들의 변량을 계산할 수가 있다. 본 연구에서는 부피가 다른 두 반응용기에서의 플라즈마 변수 진단을 통해서 부피가 커진 환경에서의 전자온도와 전자밀도가 떨어지는 현상을 관찰하였고, 공간 평균 모델로 계산된 외부변수들의 변량을 적용하였을 때 원래의 값으로 가까워 지는 경향을 볼 수가 있었다. 이렇게 같은 공정 결과를 얻기 위한 외부변수들의 변량을 간단히 계산함으로써 대면적화가 되었을 때 외부변수들을 얼마나 변화시켜야 하는지에 대한 일반적인 방향을 제시해 줄 수 있다.

• Safe Food
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• v.5 no.4
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• pp.33-37
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• 2010

• Nuclear Engineering and Technology
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• v.43 no.3
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• pp.217-242
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• 2011

A variety of Generation III/III+ water-cooled reactor designs featuring enhanced safety and improved economics are being proposed by nuclear power industries around the world in efforts to solve the future energy supply shortfall. Thermal-hydraulics is recognized as a key scientific subject in the development of innovative reactor systems. Phase change by boiling and condensation in the reverse process is a highly efficient heat transport mechanism that accommodates large heat fluxes with relatively small driving temperature differences. This mode of heat transfer is encountered in a wide spectrum of nuclear systems,and thus it is necessary to determine the thermal limit of water-cooled nuclear energy conversion in terms of economic and safety. Such applications are being advanced with the introduction of new technologies such as nanotechnology. Here, we investigated newly-introduced nanotechnologies relevant to boiling and condensation in general engineering applications. We also evaluated the potential linkage between such new advancements and nuclear applications in terms of advanced nuclear thermal-hydraulics.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2005.11a
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• pp.85-91
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• 2005

• 한국약용작물학회:학술대회논문집
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• 2008.05a
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• pp.158-159
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• 2008

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.13-14
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• 2013

Mechanical splices has been applied in nuclear power plant according to ASME(American Society of Mechanical Engineering) and ACI(American Concrete Institute) Code requirements. In particular sleeve with ferrous filler metal splices and cold roll formed parallel threaded splices have been used in domestic nuclear power plants. The objective of this study is to find out the constructability of the mechanical splices which had been used in Korea nuclear job site and to review the technical trends in the near future.

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.1374-1376
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• 2003

The output of solar cell or array depends on the weather conditions such as cell temperature and insolation level. If the output of the photovoltaic system would be regularly generated under any weather conditions, it is so easy to develop the inverter, its related system, and also control algorithm. This can be performed by the VISC(virtual-implemented solar cell) system studied in this paper. And a few I-V curves are provided by the manufacturers, and so any I-V value between the given curves is unknown. The new model for solar cell is proposed which is based on the interpolation. Both simulation and experiment are executed to show the validity of the proposed VISC system.

• Korean Journal of Environmental Biology
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• v.27 no.1
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• pp.95-99
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• 2009

Transcriptomic changes in the brain of Limanda yokohamae were investigated to understand the environmental condition of Masan Bay, Korea. Differentially expressed genes (DEGs) in the brain of the flat fish from Masan Bay were identified by comparing those from the reference site Gangneung using annealing control primers-based polymerase chain reaction. The results demonstrated that two different kinds of the cytoplasmic ribosomal proteins, 40 s ribosomal protein S27a and ribosomal protein L6, were identified by the BLAST searching followed by sequence analysis. These findings suggest that environmental status of Masan Bay could hinder protein synthesis that is required for maintaining brain functions and thus cause the dysfunction of fish physiology.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.489-490
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• 2015

본 논문에서는 독립 3상 구조 이중공극 영구자석형 동기 전동기 구동 시스템의 Y 및 ${\Delta}$결선에 따른 운전특성을 비교 분석하고자 한다. 본 연구에 사용된 전동기의 경우, 일반적인 3상 교류 전동기의 형태와는 달리 양측 회전자와 고정가 대칭인 이중공극형 구조를 가진다. 또한 고정자측은 링 형태의 독립 단상 권선 기반의 모듈 형태로 구성되어있기 때문에 Y결선 또는 ${\Delta}$결선이 가능한 구조를 보여주고 있다. 따라서 본 논문에서는 두 가지의 결선방식에 대한 속도제어 특성을 분석하기 위해서 Y 및 ${\Delta}$결선의 수학적인 모델링을 수립하였고 실험을 통하여 각 결선에 따른 운전특성을 비교 분석하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.11a
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• pp.195-196
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• 2007

In this paper, we investigated impurity content of carbon nanotube reinforced semiconductive shield materials and conventional semiconductive shield materials in power cables. To reduce impurity content, we used solution compounding method that an adding process of extra additives neglected. Impurity content measured through ICP-AES(Inductively Coupled Plasma Atomic Emission Spectroscopy). Also, impurity measured Ca, Cu, Fe, Al, Mg, Na, K, Si in eight. As a result, carbon nanotube reinforced semiconductive shield materials is lower than conventional semiconductive shield materials in impurity content by ICP-AES.