• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
• /
• 2007.04a
• /
• pp.237-242
• /
• 2007

The NGIS(National Geographic Information System) project is in its third phase currently. To put the produced data to practical use, central and local governments are trying to implement spatial data warehouse(SDW). In this study, status of local and international SDW(Spatial Data Warehouse) technology were investigated. It has been observed that in Korea it was necessary to shift the focus from management of spatial data to servicing of spatial data to information end users. To that end, the following tasks should be pursued : 1) standardization, 2) automatic ways of linking various legacy administrative information, 3) development of customized middleware for spatial data integration and 4) legal system infra structure.

• Proceedings of the Korean Information Science Society Conference
• /
• 1999.10a
• /
• pp.78-80
• /
• 1999

멀티데이터베이스를 구축하기 위해서는 전역스키마 (global schema) 구축이 필수적이며, 지역스키마(local schema) 간 충돌 해결과 스키마 통합 정보는 질의 처리 및 질의 결과를 사용자에게 보여주기 위해 필요하다. 전역스키마 생성 및 충돌 해결 방법은 많이 연구가 되어 왔다. 하지만, 스키마 통합을 위한 정보가 어떻게 표현되고, 어떻게 사용되는지에 대한 연구는 부족하다. 본 논문에서는 지역스키마와 전역스키마를 XML DTD 및 XML 문서로 표현하고, 이를 이용하여 멀티데이터베이스를 위한 스키마 통합 방법을 제안한다. 스키마 통합정보와 멀티데이터베이스와 지역데이터베이스들간 데이터교환을 XML을 이용함으로써 이기종간 데이터 교환이 쉽고, 멀티데이터베이스 시스템의 확장 및 다른 시스템으로의 전환이 용이하게 된다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2002.10c
• /
• pp.70-72
• /
• 2002

본 논문에서는 분산된 XML 문서를 수집 처리하여 상호 제공하는 과정에서 활용될 통합된 XML 문서의 전역 스키마를 생성하는 시스템을 제안한다. 제안된 시스템에서는 분산 환경에 존재하는 개별적인 XML 문서들에 대한 지역 스키마 정보를 관계형 데이터베이스로 구축하고, 통합된 XML 문서의 데이터를 기반으로 각각의 지역 스키마 데이터베이스를 검색한 후 데이터에 적합한 스키마 정의를 추출하게 된다. 또한 추출과정에서 중복 정의에 의한 충돌 범주를 분석하고, 이를 해결하는 방법도 제시하였다. 시스템 모델링 결과 XML 문서의 구조와 검증을 명확하게 보장하는 통합된 XHL 문서의 전역 스키마 생성과 지역 스키마간 발생되는 충돌문제 해결이 가능함을 알 수 있었다.

• 제어로봇시스템학회:학술대회논문집
• /
• 2003.10a
• /
• pp.1921-1926
• /
• 2003

We build a local minimum free motion planning for mobile robots considering dynamic environments by simple sensor fusion assuming that there are unknown obstacles which can be detected only partially at a time by proximity sensors and can be cleaned up or moved slowly (dynamic environments). Potential field is used as a basic platform for the motion planning. To clear local minimum problem, the partial information on the obstacles should be memorized and integrated effectively. Sets of linked line segments (SLLS) are proposed as the integration method. Then robot's target point is replaced by virtual target considering the integrated sensing information. As for the main proximity sensors, we use laser slit emission and simple web camera since the system gives more continuous data information. Also, we use ultrasonic sensors as the auxiliary sensors for simple sensor fusion considering the advantages in that they give exact information about the presence of any obstacle within certain range. By using this sensor fusion, the dynamic environments can be dealt easily. The performance of our algorithm is validated via simulations and experiments.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.4 no.6
• /
• pp.1253-1272
• /
• 2010

In this paper, we propose a new affine shape adaptation scheme for the affine invariant feature detector, in which the convergence stability is still an opening problem. This paper examines the relation between the integration scale matrix of next iteration and the current second moment matrix and finds that the convergence stability of the method can be improved by adjusting the relation between the two matrices instead of keeping them always proportional as proposed by previous methods. By estimating and updating the shape of the integration kernel and differentiation kernel in each iteration based on the anisotropy of the current second moment matrix, we propose a coarse-to-fine affine shape adaptation scheme which is able to adjust the pace of convergence and enable the process to converge smoothly. The feature matching experiments demonstrate that the proposed approach obtains an improvement in convergence ratio and repeatability compared with the current schemes with relatively fixed integration kernel.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.7 no.4
• /
• pp.604-611
• /
• 2003

Currently, Busan Metropolitan City is under the economic depression. To solve these problems, this study attempts to provide strategies for building local IT policies, especially for vitalizing software industry. Firstly, it analyzes the trends and basic status on the Busan software industry. Secondly, case studies by S/W policy initiators are conducted, and followed by empirical studies including in-depth interviews from government officials, researchers, and businessmen in Busan metropolitan city. Finally, it provides policy alternatives and strategies for building the local S/W development policies including the role and necessity of S/W industry in vitalizing the local economy, improving financial capacity of local governments, reorganizing of relationship among different levels of governments, and the possibility of integration of policy instruments and organizations.

• Spatial Information Research
• /
• v.20 no.5
• /
• pp.111-118
• /
• 2012

Survey control points managed by national and local governments are associated with civilian's property and they are very important national facilities. Despite the importance of surveying results, Database and mark of survey control points, there are many problems noticed of the management aspects such as manpower, systems, and related law. Currently, each local government has built and operated Geographic Information System(GIS) independently by National Geographic Information Systems(NGIS) results. but it is still difficult to have the integration, linking and utilizing. Therefore, In this study proposed the functional improvement of GIS based control points integrated system for providing information and management and the establishment of first-payment system due to the moving of control points. Through this studies will be able to solve the problem of recovery charges according to unknown contractor and establish the basis of manager and user-centric one-stop integration system.

• Proceedings of the KSRS Conference
• /
• 2003.11a
• /
• pp.1329-1331
• /
• 2003

Improvement of the classification accuracy is one of the major concerns in the field of remote sensing application research in recent years. Previous research shows that the accuracy of the conventional classification methods based only on the original spectral information were usually unsatisfied and need to be refined by manual edit. This present paper describes a method of combining the image processing, ancillary data (such as digital elevation model) and expert knowledge (especially the knowledge of local professionals) to improve the efficiency and accuracy of the satellite image classification in hilly land. Firstly, the Landsat TM data were geo-referenced. Secondly, the individual bands of the image were intensitynormalized and the normalized difference vegetation index (NDVI) image was also generated. Thirdly, a set of sample pixels (collected from field survey) were utilized to discover their corresponding DN (digital number) ranges in the NDVI image, and to explore the relationships between land use type and its corresponding spectral features . Then, using the knowledge discovered from previous steps as well as knowledge from local professionals, with the support of GIS technology and the ancillary data, a set of conditional statements were applied to perform the TM imagery classification. The results showed that the integration of image processing and spatial analysis functions in GIS improved the overall classification result if compared with the conventional methods.

• Management & Information Systems Review
• /
• v.21
• /
• pp.1-27
• /
• 2007

government is rising interest about CRM gradually. At this of time presenting visible effect, this study grasped success factors through the concept arrangement and the existing literature about CRM. The capacity of CRM and the result of CRM (interest of local department which is a variable, a specialty manpower, business cooperation between department, evaluation and compensation, system integration level that is special variable, possibility of system extension, ease of system use) analyzed to local government employee how affects through actual proof analysis.

• The Journal of Information Technology
• /
• v.5 no.3
• /
• pp.65-80
• /
• 2002

A key concern at these days is where to find a suitable location for their business activities, bearing in mind that they must find the right balance between global integration and local responsiveness. This article suggests that globalization may be enabled by Information Technology. It focuses on the sourcing process, an area where globalization is often claimed to be the case. Re-examination of empirical evidence shows that global sourcing is not as generally predominant as is claimed. Consequently inhibitors to global integration exist and these inhibitors are classified into three categories: geographical, relational and environmental inhibitors. The role information technology plays in reducing these inhibitors and formulate propositions that are then illustrated in two case studies. Information technology is proposed to reduce the geographical and relational inhibitors, but it will have no effect on environmental inhibitors. However, the latter category of inhibitors will become more prominent in the future. Information technology thus shifts the balance towards global integration, but simultaneously creates new problems in managing internationalization.