Cu-Zn-Al 형상기억합금의 첨가원소에 따른 감쇠능의 변화

이상관,정찬상 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.1

The effect of misch metal, Ti, Ni and Mn on damping capacity of Cu-Zn-Al shape memory alloys and the optimum heat treatment condition for high damping of the alloy have been studied. Specific damping capacity(SDC) of both Cu-Zn-Al alloys and the elements added Cu-Zn-Al alloys show amplitude dependence and increase with increasing maximum strain amplitude. Maximum SDC of the Cu-Zn-Al alloys are not dependent of composition, but nearly constant about 42% in the range of transformation temperature. Maximum SDC of the elements added alloys is, however, decreased a little but the step quenching and low temperature aging process is suitable heat treatment condition to increase in SDC of the elements added alloys.

환경친화적 택지개발 계획방향에 관한 연구

이상관 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

This study aims to propose a necessary research direction for the improvement of environmental sustainability in residential land development processes. To accomplish this purpose some of the residential land development projects implemented within and around Taegu Metropolitan City were scrutinized with the some of the ecological indexes. The results of this study prove that well-designed development projects can alleviate the degree and scale of environmental burden generated by the projects.

KT-1 비행조종장치 복합재 조종봉 개발

이상관,권진회,김광수,양승운,Lee, Sang-Gwan,Gwon, Jin-Hoe,Kim, Gwang-Su,Yang, Seung-Un 재료연구소 2003 機械와 材料 Vol.15 No.1

아파트 단지의 주차수요 산정에 관한 연구

이상관,박찬돈 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

The purpose of this study was to analyze the estimating of parking demand in apartment complexes and was compared the number of vehicle with parking regulations. In this study, parking regulations was highly in large scale residential area, and the other hand small scale was lowly. Moreover, residential area and the number or vehicle were correlated, but residential area and parking regulations ratio were not correlated. Estimating models of parking demand developed in this study, are expected to generate available data in site planning and apartment complexes.

주거환경개선사업의 개선방안에 관한 연구

이상관 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

This study aims to propose implemental strategy to enhance the efficiency the dwelling environment enhancement projects in Daegu Metropolitan city. To accomplish these objectives this study reviews two different redevelopment projects, such as community of dwelling house, field renewal method. Finding of this study show that in order to provide rational criteria for the various urban renewal projects selected criteria which can determine the conditions of surrounding environment should be classified as detail as possible. Finally, this study emphasizes the importance of citizen participation in the dwelling environment enhancement project to achieve the projects' orginal goals and public concerns.

연산시간을 고려한 이산시간 LQG 제어기의 궤환 특성

이상관,신문걸 지산간호보건전문대학 1994 지산간호보건전문대학논문집 Vol.12 No.-

흰쥐에서 사염화탄소 투여로 유발된 간 손상에 대한 안진쑥 추출물의 치료효과

이상관 한국임상수의학회 2005 한국임상수의학회지 Vol.22 No.3

This experiment was conducted to find out the therapeutic effect of Artemisia capillaris extracts on hepatic damage in rats induced by carbon tetrachloride (CCl4). In this experiment, 96 Sprague-Dawley rats were used as experimental groups, which were divided into 4 groups; control group(A), CCl4-treated group(B), CCl4+Artemisia extract-treated group(C) and CCl4+silymarin-treated group(D). The B, C, D group were administrated single dose of CCl4(2.5ml/kg) to induce acute hepatic injury. C group was administrated with Artemisia capillaris extract(200mg/kg/day) and D group treated with silymarin(50mg/kg/day) for 7 days. Hematological, ultrasonographical, histological examinations and examination of antioxidant activity were also performed in all groups. AST and ALT activities of C group were significantly decreased compared with B group. The activities of AST and ALT in C and D groups returned to the normal range more rapidly than those of B group. In ultrasonographic examination, the echogenicity of liver in C group was significantly decreased compared with B group. Also C and D group had tended to recover faster than B group on liver histogram. Histologically, the percentage of degenerative regions and degenerative cell numbers in peri-central vein hepatic parenchyma of C and D group were significantly decreased compared with B group. In examination of lipid peroxidation, malondialdehyde of hepatic tissue in C group was decreased as compared with B group. In examination of antioxidant enzyme activity in liver, glutathione peroxidase and catalase activities were significantly increased compared with B group. As results of this study, it is thought that A. capillaris extract has therapeutic effects on hepatic injury induced by carbon tetrachloride, and has the similar therapeutic effects as silymarin in rats.

도시가로에서 교통류 특성과 교통용량 산정기법에 관한 연구

이상관,박찬돈 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

The purpose of this study is to traffic flow characteristics and the proper method of estimating traffic capacity on the arterial. The major results of this study can be summarized as follows ; (1) The relationship of density and speed, Greenshields model is proper than other models. (2) The density estimated through S-V relationship is 174 ㎞. (3) The methods used in this paper yields more stable values with 2286 veh./h.

양방향 곡선 전개방식을 이용한 망막영상에서의 시신경 원판 경계 검출

이상관,김성곤 한국콘텐츠학회 2005 한국콘텐츠학회논문지 Vol.5 No.6

This paper describes a technique for detecting the boundary of the optic disk in digital image of the retina using inward and outward curve evolution. This paper offers medical information about glaucoma progresses. For accurate boundary detection, image inpainting based on texture synthesis removes blood vessels crossing the optic disk. For removing noises and preserving boundary of optic disk in image inpainting process, the anisotropic diffusion filtering is necessary. After pre-processing, the optic disk boundary is determined using inward and outward curve evolution. The experimental results show that the algorithm is effective for detection of optic disk boundary. 본 연구에서는 실명(loss of eyesight)의 원인 질병중 하나인 녹내장의 진행과 진단 등의 의료 정보제공을 목적으로 양방향 곡선 전개 방식을 이용하여 망막 영상에서 시신경 원판(optic disk)의 경계를 검출하는 방법을 제안한다. 정확한 경계 검출의 위하여 텍스처 병합(texture synthesis)기반의 이미지 인페인팅 방법으로 시신경 원판 위를 지나는 혈관을 제거하고 전처리 과정에서 발생하는 잡음제거와 경계의 보존을 위해 비등방성 확산 필터링(anisotropic diffusion filtering)을 행한다. 혈관이 제거된 망막 영상에서 시신경 원판의 경계 검출은 양방향 곡선 방식으로 검출한다. 실험 결과에서, 제안한 알고리즘은 복잡한 망막영상에도 효율적으로 시신경 원판을 검출한다는 것을 보여준다.

도시 간선가로의 공사중 교통특성에 관한 연구

이상관,홍성우,이두진 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)

This study analyzed the variation of delay time to speed and traffic volume on various comparative and analytic methods, link construction in Daegu City's urban street as the basic data on traffic management counterplan under road construction. The delay time at the link is calculated by applying three methods of capacity analysis, shockwave theory and gueueing theory. While the result of the capacity analysis is similar to that of shockwave theory. The result of the queueing theory shows that v/c increases rapidly at 0.4 and increases slowly from 0.7 The results of comparative-analysis between the outcoming of the shockwave theory, queueing theory and capacity analysis at two or three-lane-road like and underwood value, the actual field survey outcoming are as follows : The queueing theory shows the most suitable reliability at two-lane-road and capacity analysis shows the most suitable reliability at three-lane-road.