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Design and Implementation of Differencing and Merging Scheme for Cooperative Version Control System
이병걸,Lee, Byong-Gul Korea Information Processing Society 2000 정보처리논문지 Vol.7 No.1
버전관리 시스템은 한 개의 문서에 대한 여러 인스턴스들 사이의 일관성을 유지하기 위하여 버전의 탐색, 충돌 인지, 병합기능 등을 제공하는 어플리케이션이다. 하지만 기존의 버전관리 시스템에서는 협동작업 환경하에서 요구되는 개인별 히스토리 관리 및 저장, 텍스트 객체를 포함한 다양한 문서 제작 행위 객체들 간의 충돌 인지 및 병합, 그레인 크기 및 협동작업자의 역할에 기반한 문서 접근관리 기능 등은 지원하지 못한다. 본 연구에서 제시된 AID 태그 기법은 유일주소 지정기법을 사용하여 협동작업 환경하에서의 다양한 행위 객체들간의 충돌 인지 및 버전 병합을 용이하게 하고, 접근권한 테이블과 역할부여 기능을 AID 태그와 연계함으로써 작업 참여자의 역할 및 그레인 크기에 따른 문서 접근관리가 가능하도록 하였다. 또한 AID 태그 기법은 버전정보의 저장 및 관리를 위해 소요되는 파일의 크기를 줄이는 효과를 가져다 준다. Version control is an application to maintain consistency between different instances of the same document allowing operations such as navigation, differencing, and merging. Most version control systems, however, lack the support of functionality for cooperative writing environment, such as to represent and store the history of the actions of different individuals, to effectively differentiate and merge the individual actions including the text object, and to manage different access privileges for different granularity and individuals. With the help of Activity IDentification (AID) tag and its unique addressing scheme proposed in this paper, differencing and merging become simple and effective. Access and role control is improved by associating the access right table and role assignment in AID scheme also eliminates the requirements for large storage capacity for version information maintenance.
이병걸 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-
Geo-Spatial Information System is generally to be defined as a system of hardware. software, data, and organization structure for collecting, storing, manipulating and spatially analyzing geo-referenced data. In the system, geographic analysis is one of the most important role to spatially analyzing geo-referenced data. In this study, we applied GSIS techique to Jeju Island for the geographic characteristics analysis. For the study, we used MGE and Arcview software supported by Intergraph and ESRI company. The analysis results suggest that the gradient and cross section pattern calculated by ESRI are reasonable and the gradient vector flow pattern shows general water flow very well as we expected.
이병걸,최영찬 濟州大學校 海洋硏究所 2004 해양과환경연구소 연구논문집 Vol.28 No.1
To find out the horizontal and the vertical temperature structures and the current characteristics of coastal ocean around Jeju Power Plant located at north part of Jeju Island, we observed the seawater temperature in March, May, September and December, in 2003 and also 15 days long times waves using a current meter respectively. The observed results show that the seasonal variations of the horizontal and vertical temperature pattern happened. However, the horizontal temperature distribution pattern was not much changed. It means that the horizontal temperature change was not so strong due to tidal mixing effects in coastal area. So that the density current was so weak by the weak stratification effects. The surface current pattern shows that the M₂ tidal current component was relatively strong compared with K₂, K₁, 0₁ and constant flow. From the observation results, we found that the density current around Jeju Power Plant was very weak but the surface current was strong since the tidal current effects.