Pseubomonas aeruginosa의 Temperature Sensitive 突然變異體의 유도와 분리

유관희,정기흥,정순정,이형환 건국대학교 1983 論文集 Vol.16 No.1

Sixty-one temperature-sensitive mutants of Pseudomonas aeruginosa have been isolated from the mutagenized culture with N-methyl-N'-nitro-Nitrosoguanidine. The mutagen was treated at 36℃ and the ts-mutants were isolated at the non-permissive temperature of 42℃ by size of colony and growth. Twenty-five mutants were smaller in the size of colonies at 42℃ than those of 36℃, and thirty-sin mutants were not growed at 42℃.

다중 참여자 3차원 웹 브라우징 시스템을 위한 서비스 통신 규약 설계

유관희 충북대학교 컴퓨터 정보통신 연구소 1997 컴퓨터정보통신연구 Vol.5 No.1

본 논문에서는 인터넷을 통하여 3차원 가상 공간상에서 다중 참여자를 지원하는 응용서비스, 예를 들어 화이트보드(White board) 지원 대화방, 시합 및 가상 공간 설계 서비스등을 가능하게 하는 다중 참여자 3차원 웹브라우징 시스템을 구현하기 위한 효율적인 통신 규약을 제안한다. 본 통신 규약에서는 3차원 가상공간, 동적 객체 및 참여자를 위한 참여자 표현을 위해 VRML 1.0 화일을 사용하고 인터넷상의 응용 서비스 지원을 위해 웹의 통신 규약일 HTTP을 사용한다. 더욱이 가상 공간상의 다중 참여자와 동적 3차원 객체 조직을 위해 참여자의 변화 정보 및 참여자간의 대화정보와 3차원 동적 객체 정보 전송 기능을 제공한다. In this paper, we propose an efficient service protocol for implementing a 3D Web browsing system. It is possible for the 3D Web browsing system to design application services such as chatting with board, games and design of virtual spaces, which support multi-user to represent 3D virtual spaces, dynamic objects, and avatars for users, and a HTTP on Internet is also used as the low layer of the protocol. In addition, the protocol provides the changing information of avatars and dynamic 3D objects, and the chatting one among avatars for manipulating multi-user and dynamic 3D objects in a virtual space.

3차원 삼각형 메쉬에 대한 기하학적 스내핑과 그의 응용

유관희,하종성 한국정보과학회 2004 정보과학회논문지 : 시스템 및 이론 Vol.31 No.4

2차원 영상에 대한 이미지 스내핑(image snapping)이란 이미지 상에서 커서를 찍었을 때 그 커서를 이미지상의 에지와 같은 주요 특징을 나타내는 위치로 자연스럽게 옮기는 기능을 말한다. 본 논문에서는 이미지 스내핑 개념을 3차원 삼각형 메쉬로 확장한 기하학적 스내핑(geometric snapping)을 제시한다. 기하학적 스내핑이란 이미지 스내핑과 유사하게 사용자가 삼각형 메쉬상에서 선택한 위치가 주요 특징을 나타내는 위치로 자연스럽게 옮겨갈 수 있는 기능을 말한다. 커서의 움직임은 삼각형 메쉬상에 정의된 근사 곡률(approximate curvatures)을 기반으로 이루어진다. 제안된 기하학적 스내핑을 응용하여 3차원 삼각형 메쉬상에 나타나는 주요 특징을 찾을 수 있었고, 더욱이 치과 보철물 분야에서 교합면을 생성하는데 필수적인 치아의 기하학적 특징을 추출하는데 적용될 수 있음을 알았다. Image snapping for an image moves the cursor location to nearby features in the image, such as edges. In this paper, we propose geometric snapping for 3D triangular meshes, which is extended from image snapping. Similar to image snapping, geometric snapping also moves the cursor location naturally to a location which represents main geometric features in the 3D triangular meshes. Movement of cursor is based on the approximate curvatures which appear geometric features on the 3D triangular meshes. The proposed geometric snapping can be applied to extract main geometric features on 3D triangular meshes. Moreover, it can be applied to extract the geometric features of a tooth which are necessary for generating the occlusal surfaces in dental prostheses.

Hierarchical Mesh Segmentation Based on Global Sharp Vertices

유관희,박찬,박영진,하종성 한국콘텐츠학회 2009 International Journal of Contents Vol.5 No.4

In this paper, we propose a hierarchical method for segmenting a given 3D mesh, which hierarchically clusters sharp vertices of the mesh using the metric of geodesic distance among them. Sharp vertices are extracted from the mesh by analyzing convexity that reflects global geometry. As well as speeding up the computing time, the sharp vertices of this kind avoid the problem of local optima that may occur when feature points are extracted by analyzing the convexity that reflects local geometry. For obtaining more effective results, the sharp vertices are categorized according to the priority from the viewpoint of cognitive science, and the reasonable number of clusters is automatically determined by analyzing the geometric features of the mesh.

회계정보시스템 설계시 내부감사인과 시스템분석가 간의 인식차이에 관한 연구

유관희,허춘 韓國公認會計士會 2000 회계·세무와 감사 연구 Vol.36 No.-

본 연구는 컴퓨터화된 회계정보시스템을 설계하는데 있어 시스템분석가에게만 의존하는 것보다 내부감사인이 동참하는 것이 보다 우수한 통제능력을 갖춘 시스템을 개발할 수 있을 것이라는 전제에서 진행되었다. 이 전제를 간접적으로 검증해보기 위해, 내부감사인이 시스템분석가보다 회계시스템의 내부통제기능을 평가,분석하는데 한 차원 높은 자질을 가지고 있는가를 간단한 시나리오분석을 통해 알아보았다. 본 연구의 결과는 시스템분석가들과 내부감사인들간에 내부통제요소를 찾아내는 데나 통제요소의 중요성을 평가하는 데에 별 차이가 나지 않음을 보여주고 있다. 즉, 시스템 개발과정에 내부감사인이 참여하여야만 시스템의 통제능력이 더욱 향상된다고 결론내리기는 어렵다는 점을 시사해주고 있다. The major objective of this study was to investigate whether internal auditor involvement in the design of computerized accounting information systems might result in an improved system. To this effect, this study examined whether a difference existed in the analysis of internal controls between systems analysts and internal auditors. The internal auditors were considered superior to the systems analysts in inserting control features within a system. The primary finding of this study was that no significant difference was found between the groups in their identification of internal control measures, or in their evaluation of the importance of internal control measures. This result implies that the participation of internal auditors does not always guarantee a superior computerized AIS.

합성배지에서 Stropharia rugosoannulata 가 생산하는 섬유소분해효소에 관한 연구

유관희,장형수 한국균학회 1999 韓國菌學會誌 Vol.27 No.2

For the purpose of utilizing cellulose resources by cellulolytic enzymes of Stropharia rugosoannulata, it's cultural conditions for the prodution of cellulolytic enzymes in synthetic media were investigated. The optimum pH for the production of Avicelase and β-glucosidase was pH 5.0, while that of CMCase was pH 4.0. The optimum temperature for the production of Avicelase, CMCase and β-glucosidase was 40℃. Among the carbon sources, xylose was good for the production of CMCase and β-glucosidase, but maltose was good for the production of Avicelase. The optimum concentration of the carbon sources for the production of CMCase, Avicelase and β-glucosidase was 1.0, 0.8 and 1.1 %, respectively. As inorganic nitrogen sources, NH₄Cl was good for the production of all the three cellulolytic enzymes. The optimum concentration of NH₄Cl for the production of CMCase was 0.3% while that of Avicelase and β-glucosidase was 0.4%. As organic nitrogen sources, malt extract was good for the production of all the three cellulolytic enzymes. The optimum concentration of organic nitrogen for the production of β-glucosidase was 1.3% while that of CMCase and Avicelase was 1.0%. As the mineral sources, CoCl₂ good for the was good for the production of all the three cellulolytic enzymes. The optimum concentration of CoCl₂ for the production of all the three enzymes was 0.35%.

Morphological Changes of Radiation-Induced Atretic Follicles in Mouse Ovary

유관희,김성인,권오유 대한의생명과학회 2006 Biomedical Science Letters Vol.12 No.2

디지털 교과서 표준화 현황

유관희,유재수,이석재 한국정보과학회 2008 정보과학회지 Vol.26 No.6

폐에 발생한 과오종 1예

유관희,이남심,조광호,이양근 전북대학교 의과학연구소 1986 全北醫大論文集 Vol.10 No.4

The hamartoma is the most common benign tumor of the lung, but the incidence is very low. Most of hamartomas are revealed accidentally as coin lesion on routine chest x-ray because the are no symptoms usually, and the tumor frequently mimic clinically the more common lung tumors such as cancer. Recently, we have experienced on case of pulmonary hamartoma which was diagnosed with percutaneous needle lung biopsy and was confirmed with operation. Her postoperative course was uneventful. She was discharged in a good condition. (Key words : hamartoma, lung)

공중전화기 송수화기에 존재하는 미생물의 오염 및 이들에 대한 제어에 관한 연구

張亨秀,柳寬熙 尙志大學校 1991 論文集 Vol.12 No.-

On studying microbes (Bacteria and Fungi) and appearance frequency which are public telephone in Seoul area (10 sites), the results are summarized as follows: 1. 5,000 strains of 32 species of Bacteria are isolated in public teleophone. Among them, three are Staphylococcus aureus. Bacillus anthracis which are pathogenic to human beings. 2. In Fungi, 935 strains of 13 species are isolated. That of highest frequency is confirmed to be Aspergillus fumigatus which is pathogens of Aspergillosis (ones of a groups of animals and human being caused by various species of Aspergillus). 3. 0.2% HgCl₂, Lamicine, TEGO-G, ABSORB were better than any other in fungicidal effect.