• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2010.04a
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• pp.77-80
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• 2010

The demand for human security significantly promotes the development of surveillance applications using a multi-sensor integrated UAV system. For more sophisticated operations, the system should provide a sequence of images rectified in a ground coordinate system in realtime. This rectification requires accurate position and attitude of the camera at the time of exposure of each image, which can be estimated through an Aerial Triangulation process using the GPS/INS data and tie points between adjacent images. In this work, the KLT tracker is utilized to obtain the tie points. To satisfy the realtime requirements, we present an approach to speed up the tracker by supplying the initial guessed positions of tie points based on the exterior orientation. The experimental results show that, when the guessed positions are supplied, the KLT tracker consumed less computational time than the ordinary KLT which is more suitable to be incorporated into the realtime image georeferencing process.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06c
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• pp.252-254
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• 2011

본 연구에서는 온라인 사용자 후기글 혹은 상품평관련 사이트에서 나타나는 '질의(Ouery)'가 무엇에 대한 것인지를 분석하고, 그 초점을 제시하는 시스템의 구현을 위하여 요구되는 언어자원을 구축하는 것을 목적으로 한다. 이를 위해 개상의 상태 혹은 성질을 나타내는 의문사 '어떠하' 질의문 유형을 추출하여 여기에서 실현되는 질의초점 명사구에 대한 어휘 사전 및 통사 패턴 LGG문법을 구축하여 질의문의 초점 분석을 위한 체계적인 언어자원 구축의 필요성을 강조하였다. 이와 같이 구축된 LGG문법과 초점어휘 사전의 성능평가를 위해 실험을 수행하였고, 재현률 59%와 정확률 98%의 실험결과를 얻었다.

• Journal of the korean Society of Automotive Engineers
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• v.9 no.2
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• pp.28-33
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• 1987

This thesis is to improve the mechanical properties of carbon steel by the ion-nitriding, and post-heat treatment. The structures of ion-nitrided SM45C steel were changed to martensite by quenching from 730.deg. C and 800.deg. C. And then a few of the quenched specimens was tempered at 200.deg. C for 120 min. The emphasis in this study is focussed on Comparison of hardness and fatigue strength with the ion-nitrided steel. The results obtained are summerized as follows. 1. To improve the hardness and fatigue strength of ion-nitrided steels, it is effective to under take diffusion treatment for a short time at the austenite temperature(800.deg. C). 2. If ion-nitrided steel is heated for a long time at high temperature, de-nitriding occure. 3. The quenching treatment after nitriding on the carbon steel is necessary to improve the mechanical properties of the steels.

• Transactions of the Korean Society of Automotive Engineers
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• v.7 no.8
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• pp.7-16
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• 1999

To maintain thereasonable temperature in the engines is very important to keep the steady combustion state of engine and to prevent increasing of oil consumption , deteriorating of lubricant, shortening of the life time of engine and decreasing of material strength. The method of energy balance for divided elements of radiator and engine-oil cooler is considered to analyse the performance of radiator and engine-oil cooler. The data obtained by engine test and vehicle cooling tunnel test are applied to program for calculation of radiator outlet temperature. As a result, data obtained by numerical analysis agree well with those by experiments. And thus, it is concluded that this simulation program is available in developing the cooling system for a new car.

• Transactions of the Korean Society of Automotive Engineers
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• v.18 no.4
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• pp.79-83
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• 2010

Recently, the flat wiper which is one piece wiper and subjected to a pressing force at a single center point is gaining wide applications on automotive windshields. However, nonuniform reactive pressure distributions takes place, so that wiping is not completed at such locations. The wiping performance of the flat wiper is best when a wiper and a curved windshield have perfect contact without gaps under the specified pressing force of 13 ~ 15 gf/cm. Therefore, it is necessary that the realistic curvature equation of a wiper spring-rail should be obtained. Finite element analysis, CATIA script-macro function, and the least square method were utilized to find out the curvature of a spring-rail for a perfect contact with a windshield under a specified concentrated load. The curvature equation became the third order polynomial.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1995.05a
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• pp.94-99
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• 1995

본 연구는 태양열 열펌프시스템에 의한 약 6평 규모의 실내의 난방방법으로서 간접 난방인 온수순환난방과 직접난방인 복사난방의 성능을 분석하였다. 태양열 열펌프의 최대의 열적성능을 나타낼 수 있도록 알루미늄 롤 본드형 태양열 집열기의 면적을 조절하였으며 집열효과를 극대화하기 위하여 온도감응 자동팽창밸브의 용량을 변화시켰다. 본 실험에서 적용된 태양열 열펌프 난방은 서울지방 봄 가을철의 외기온도에서 실내온도가 18~2$0^{\circ}C$로 유지되도록 설계제작되었다. 태양열 열펌프시스템에 적용된 작용유체는 온수순환 난방에는 R-12냉매. 그 대체냉매는 R-134a 및 혼합냉매, 복사난방에는 R-22냉매이었다.

• Journal of Environmental Impact Assessment
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• v.10 no.3
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• pp.195-209
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• 2001

The objective of this study is intended to propose plans for reforming environmental impact assessment(EIA) systems by reviewing the current legal systems of EIA related laws and their implementation status in Korea, and by comparing the Korean situation to EIA systems in several foreign countries. This study tried to integrate all EIA related systems scattered over several laws into one comprehensive EIA law, and also to develop legal procedures necessary to accomplish the legislative purpose of the integrated EIA law. Therefore, I propose four reforms (1) All EIA systems should be integrated into one comprehensive EIA act. (2) Administrative plans and policies, though environmentally harmful, which are not currently subject to any prior consultation system, should be covered by the prior consultation system. (3) A screening or scoping should be adopted. (4) Widen civil participation should be encouraged and the administrative control enforcement and introduction of group litigation or citizen suits would be considered.

• Journal of Environmental Impact Assessment
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• v.20 no.4
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• pp.477-487
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• 2011

In this study, we deduced the best estimation methodology for amount of carbon sequestration by vegetation, through the case study using the data obtainable from the environmental assessment procedure. Our results showed that the estimation methodology using the national vegetation map was the best for the strategic environmental assessment, whileas those using the vegetation growth equation were applicable for environmental impact assessment procedure. Furthermore, we found that the amount of carbon sequestration by farmland and/or grassland, not by vegetation, was not negligible. Therefore, we concluded that the area of farmland and/or grassland need to be taken into account during the landuse planning.

• Korean Architects
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• s.487
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• pp.17-21
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• 2009

지난 8월 17일부터 23일까지 몽골건축사협회 주최로 몽골 울란바토르에서 개최된 제30차 ARCASIA 이사회 및 제15차 포럼에 앞서 15일과 16일, 양일간 2009-2010 아카시아 건축상 심사가 이루어졌다. 전체 12개 부문에 대해 우리 협회는 8개 부문, 총 11개 작품을 제출하였으며 4개 부문에서 골드메달을 수상하는 영예를 안았다. 다세대주택부문(A-2:Multiple Family Residential Complexes)에서 최삼영(주. 가와 종합건축사사무소)회원의 '용인동백 아펠바움'이, 공공시설부문(B-4, Public Amenity: Industrial Buildings)에서는 최동호(건축사사무소 마당소리)회원의 '주엽어린이도서관'이, 복합용도시설부문(B-6:Mixed Use Developments)에서는 윤세한(주. 해안 종합건축사사무소)회원의 '용산 I PARK MALL'이, 산업시설부문(C:Industrial Buildings)에서는 신춘규(씨지에스 건축사사무소)회원의 '아임삭 오창 공장'이 골드메달을 수상했다. 다음은 심사에 참여한 이근창 국제위원회 전문위원의 심사평이다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.401-404
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• 2011

본 연구에서는 산불위험도를 예측하기 위하여 GIS를 이용하여 산불위험지도를 작성하였다. 산불위험지도 작성을 위한 자료 수집은 수종별 및 부위별 착화시간과 착화 후 화염지속시간 데이터, 강원도 삼척시 식물군락명 속성정보가 이용되었다. 연구결과, 가지와 수피부위는 유사한 구역에서 착화위험성이 높은 것으로 나타났으며, 착화 후 화염지속시간이 긴 것으로 분류되어 산불위험도가 높은 것으로 나타났다. 생엽의 경우는 동일 구역에서 착화위험성은 높으나 화염지속시간이 짧은 상반되는 결과를 보이는 것으로 나타났다.