• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2004.05a
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• pp.77-77
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• 2004

• Proceedings of the Korea Technology Innovation Society Conference
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• 2015.05a
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• pp.143-148
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• 2015

• KOGO NEWS
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• v.6 no.1
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• pp.12-23
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• 2006

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.447-448
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• 2010

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.745-746
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• 2010

• 한국정보통신설비학회:학술대회논문집
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• 2003.08a
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• pp.346-348
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• 2003

본 논문에서는 플라스틱 광섬유용(POF) 광커넥터와 광송수신모듈을 설계. 제작하여 특성을 평가하였다. 650nm와 850nm POF 광커넥터는 광학적, 기계적, 환경적 신뢰성 시험을 통해 안정성을 확증할 수 있었다. POF 광송수신모듈은 1.25Gbps와 155Mbps급의 SC, RJ-45 형태의 구조로 제작되었고, 이를 적용하여 S/W Hub 및 광전 Outlet, Media Converter등을 구현하였다.

• Journal of the Korean Society of Combustion
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• v.14 no.3
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• pp.24-28
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• 2009

To improve its efficiency, most of the industrial furnace had been used recuperator. However, commonly used metal recuperator is not suitable under condition of temperature higher than $1000^{\circ}C$. The other hand, ceramic recuperator is able to use in high temperature condition. In the present study, the design program based on the basic heat exchanger design theory, and CFD modelling are applied to ceramic recuperator to verify the design results. Using design program to find the optimum design factor on the variation of recuperator condition. The result of this study are as follows : Thinner fin-plate thickness reduces pressure drop and increases heat-transfer rate, However, thin plate or plate with thin thickness(< 5 mm) is difficult to manufacture, due to limited mechanically strength.

• KLA journal
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• v.47 no.1 s.368
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• pp.24-45
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• 2006

지난 연말의‘도서관계 10대뉴스’에서 보았듯이 2005년에는 도서관법 전면개정 추진, 도서관에 개인정보인권 보호조치 권고, 저작권법 개정, 사서교사 임용, 주40시간 근무제, 독서문화 확산 등 여러가지 큼직한 일들이 있었다. 2006년도에는 그 어느 해보다 많은 변화가 예상된다. 특히 세계도서관인들의 축제인 <2006서울세계도서관정보대회>가 서울에서 열린다. 세계에 한국의 도서관문화와 사서들의 활동을 알릴 수 있는 좋은 기회가 될 수 있도록 도서관인 모두의 적극적인 관심과 홍보, 참여가 매우 중요하다. 이외에도 도서관법, 저작권법, 학교도서관진흥법 등 도서관 관련법의 제도 정비, 여전히 풀어야할 과제로 남아있는 공공도서관 민간위탁 등이 주요 이슈로 부각 될 전망이다. 프랑스의 석학 자크 아탈리는“변화를 받아들일 줄 모르면 그 존재가 사라진다.”“변화를 수용할 줄 알아야 살아남을 수 있다.”고 강조한바 있다. 변화는 21세기를 살아가는 우리들에게 매우 중요한 메시지를 남긴다. 그“변화”의 중심에 도서관계가 자리잡아 사회 속에 더 큰 부분으로 자리 매김 할 수 있는 한 해가 되기를 바란다. ■ 편집자 주

• Korean Journal of Computational Design and Engineering
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• v.17 no.1
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• pp.54-61
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• 2012

In this paper, we performed numerical analysis to improve the heat exchange efficiency of wasted heat recovery ventilator which has a delivery and a exhaustion fan. One of the most important design factors that affect the efficiency of heat exchange is uniform counter-flow between inbound and outbound air flows. We had simulated several types of porous plates which were installed at air intake area. With plate having 45 degrees of installation angle and 15 mm diameter holes which are uniformly arranged, we can generate a uniform air flows at the area of porous media where inbound and outbound air flows are cross over. In addition, we installed a duct to reduce vortex flows at the outlet and to discharge exhaust airs rapidly. By using the proposed numerical assessment, we expect the improvement of the heat exchange efficiency of ventilator.

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.106-109
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• 1992

This paper Introduces the concept of the generation cost of generating utilities and its calculation methods. Also, the economic evaluation method using generation cost which is called as a screening curve method will be presented along with the benefits and disadvantages of this concept. Next, the least-cost electric utility planning techniques which is used very widely in many countries will be Introduced In comparison with screening curve method. In this aspects, the optimal dynamic mix can be determined as a result. By comparing these two concepts, we will get the concrete concept why the economic evaluation method using generation cost can not be used for the future generation expansion planning.