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박상용,곽영주,강인준 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-
습지는 한번 훼손되면 재생 불가능하고 그 대체물을 만들 수 없으므로 습지보전과 대책마련이 증요하다. 최근, 환경단체에서 자연습지 뿐만 아니라 산지습지에 대한 지속적인 생태적 조사와 발견이 중요하다는 인식이 높아지고 있다. 본 연구에서는 산지습원에 대한 기준점 측량방식으로 Total-Station과 GPS (Global Positioning System) 측량장비를 이용하여 정확한 위치를 규정하였고 지리정보(GIS) 기술을 활용하여 체계적으로 자료를 관리할 수 있는 표준화된 습지분포 수치지도를 제작하였다. 또한,복잡한 지도l 설계도면과 종합적 자료관리와 의사결 정 과정을 지원하기 위한 자료를 수치화 하였다.
영상처리에 의한 블랭크 가공품의 치수측정을 위한 형상요소 추출법에 관한 연구
조연상,전성재,구현호,박흥식 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1
In the design process of a press product, the reverse engineering is a necessary process. Therefore, the method of measurement must be constructed for a blank shape. In order to measure a blank shape, the vision system with non-distortion ren was constructed, and the image processing, the shape recognition and the element extraction module was made with the Visual C++ language. For the shape recognition, the distance-angle function with a shape characteristics ware used and, for the shape of element extraction, the slop function with a element characteristics was used. In this study, the shape of the rectangular gage block and circular product with a simple shape was recognized and elements in the polygon were extracted by using this system.
최상일,정연호,강창언 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1
A decorder is developed for correcting the single burst of errors. The convolutional code of Type-B2 is used for this purpose. This decoder has the ability to correct all bursts confined to m-l or fewer consecutive blocks with a guard space of the(m-1) consecutive error free blocks. A simple logical circuitry, having the same order of complexity as a pairity check circuit for a block code, is implemented to correct the errors in a communication system. The decoder used the (18,12) convolational code is designed and tested. Experimental results confirm the error-correcting ability.
노상호,김상연,양희재,장세현 경성대학교 공학기술연구소 1999 공학기술연구지 Vol.6 No.-
We developed a URL forwarding server which links one's new domain name to existing Web site. With URL forwarding one can have more compact and easy URL for his/her Web address. The forwarding server is based on the redirection response provided by the HTTP protocol. This paper presents how a domain name server, HTTP server, and the forwarding server work together to transform one's Web address to another. The server is implemented on a Linux system and with little overheads it works very fast and efficiently.
문상돈,김연직,임익태,박찬우 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
As a technology to machine the 3-dimensional shapes of general metal material more flexibly, machining technologies such as metal cutting, grinding, etc have been steadily improved in their accuracy as well. However, the working method using machining technologies are restricted in terms of surface roughness, metal working accuracy and working hours, if a workpiece has an irregular 3-dimensional shape. Magnetic abrasive finishing process is also one of the super-precision machining technologies which proceed with the finishing metal working of precision working piece using the action of magnetic field and the mixed type magnetic abrasive. However, such studies only focus on the improvement of machining accuracy but are still incomplete in investigating the roundness. This study aims to realize the high accuracy finishing machining focusing on the roundness after magnetic abrasive finishing process of circular workpiece and the surface roughness of precision machining surface.
김태연,유진홍,박성환,김연식,임상현,신완식,강문원,정창훈,최문구,강지민 대한화학요법학회 1997 대한화학요법학회지 Vol.15 No.2
저자들은 최근 화농성 슬관절염과 병발한 수막구균성 수막염 1예를 체험하였고, 이는 국내에서 아직 보고되지 않은 드문 예로 사료되어 문헌고찰과 함께 보고하는 바이다. We recently experienced a case of meningococcal meningitis associated with pyogenic arthritis in a 37-year old male patient. Pyogenic arthritis developed in right knee joint during treatment for meningococcal meningitis. He was treated successfully by appropriate antibiotics and arthroscopic irrigation. To our knowledge, such a rare case has not ever been reported in Korea, Hence we report this case with a review of related literatures.
Divergences in the Theory of Cyclotron Resonance Lineshape
최상돈,고정대,최치규,홍성락,류재연 제주대학교 1990 논문집 Vol.31 No.-
불순물이나 포논과 상호작용하는 전자계에 대한 전기전도도템서와 사이클로트론 공명 선모양 함수를 도출하였다. 전기전도도텐서를 얻는 과정에서 Kubo공식을 이용하는데 타이론에서 무시한 보정항인 충돌항을 고려하고 이 항을 열적이완시간과 관련시켜 일반적인 형태를 얻었다. 섭동향을 계산하는데 Argyres와 Sigel의 사영연산자방법과 본 논문에서 정의한 사영연산자를 토대로 한 운동방정식방법을 다루었는데 이들은 서로 동일한 결과로 나타남을 알 수 있었다. 또한 최저차수에서 구한 선모양 함수를 타이론의 결과와 비교했고 고차항에서는 타이론에서 발산하는 것과는 달리 열적이완시간이 포함됨으로써 발산항이 존재하지 않음을 알 수 있다. A new theory of cyclotron resonance lineshape for the system of electrons in interaction with impurities of phonons is introduced. The collision term appearing in the Kubo formalism is dealt with in the relaxation tine approximation. The many body conductivity tensor is reduced to two different forms in the single particle formalism. But the two conductivity formulas give the same lineshape function, implying that the two techniques are identical. The thermal relaxation time included in the lineshape function is finite , resulting in the disappearance of any danger of divergence in some higher order terms usually excluded in the formula.