• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.1
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• pp.701-711
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• 2009

The inner space of building is increasingly becoming complex as urban activities increase in variety, and the actual space size also increases. This trend necessitate the utilization of three dimensional position information within the inner space of buildings. Standard GIS web service technology and visualization technology are applied to 3D inner space building data to share these information for better decision making in building related applications such as fire evacuation, facilities management and market analysis. This study aims to effectively model and visualize the three dimensional space of building interiors in the GIS aspect, and to be able to share the information through standard GIS web service. The various elements of inner model was assigned and stored into pre-designed spatial database tables respectively. GIS web server was then configured to service the database which was populated with 3D inner model data. On the client side, 3D visualization modules was developed using a 3D graphic rendering S/W engine.

• The KIPS Transactions:PartD
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• v.9D no.1
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• pp.1-10
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• 2002

Metadata is data about data that is used to mange data itself. As applications based on DBMS are increased, it is suggested that metadata model and metadata interchange model to manage metadata in DBMS. but metadata which is in the form of XML (eXtensible Markup Language) document is generally stored into RDBMS. Therefore In this paper, as for the method to store metadata of RDBMS into OODBMS, we design metadata model, metadata interchange model and implement new repository system. The metadata of RDBMS is translated into in the form of XML Document and integrated into XML Data Server on OODBMS, eXcelon and executes retrieval metadata information about RDBMS by XQL(XML Query Language). So It is possible to searchm edit a metadata. The metadata of XML documents stored in eXcelon is easily made to be printed in web browser by applying a XSL (extensible StyleSheets Language). So we can have a detail information about property of metadata in DBMS.

• Spatial Information Research
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• v.22 no.2
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• pp.63-71
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• 2014

Ocean leisure sports have recently emerged as one of so-called blue ocean industries. They are sensitive to diverse environmental conditions such as current, temperature, and salinity, which can increase needs of forecasting data as well as in-situ observations for the ocean. In this context, a Web-based geovisualization system for coastal information produced by model forecasts was implemented for use in supporting various ocean activities. First, FVCOM(Finite Volume Coastal Ocean Model) was selected as a forecasting model, and its data was preprocessed by a spatial interpolation and sampling library. The interpolated raster data for water surface elevation, temperature, and salinity were stored in image files, and the vector data for currents including speed and direction were imported into a distributed DBMS(Database Management System). Web services in REST(Representational State Transfer) API(Application Programming Interface) were composed using Spring Framework and integrated with desktop and mobile applications developed on the basis of hybrid structure, which can realize a cross-platform environment for geovisualization.

• Journal of Internet Computing and Services
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• v.1 no.2
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• pp.11-18
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• 2000

In this paper we present a new extensible model based upon the concept of subtransactions in real-time transaction systems. The nested transaction model originally proposed by J. Moss is extended for real-time uniprocessor transaction systems by adding explicit timing constraints. Based upon the model, an integrated concurrency control and scheduling algorithm is developed, that not only guarantees timing constraints of a set of real-time transactions but also maintains consistency of the database. The algorithm is based on the priority ceiling protocol of Sha et al. We prove that the Real-Time Nested Priority Ceiling Protocol prevents unbounded blocking and deadlock, and maintains the serializability of a set of real-time transactions. We use the upper bound on the duration that a transaction can be blocked to show that it is possible to analyze the schedulability of a transaction set using rate-monotonic priority assignment. This work is viewed as a step toward multiprocessor and distributed real-time nested transaction systems. Also, it is possible to be extended to include the real-time multimedia transactions in the emerging web-based database application areas.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.179-182
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• 2001

본 논문은 웹 상에서 사용자에게 동적 컨텐츠를 제공하기 위한 멀티미디어 데이터베이스 관리 시스템의 일부로써 시스템의 하부 구조 및 기본 API 를 제공하는 멀티미디어 데이터베이스 클래스를 설계하고, 이를 기반으로 사용자 요구에 대한 멀티미디어 객체를 추출하는 질의 처리 모텔을 제시한다. 멀티미디어 데이터베이스 클래스는 다양한 형태의 멀티미디어 데이터에 대한 분류 지원 및 관련 객체를 집합으로 관리하는 기능과 멀티미디어 메타데이터 생성 및 관리 기능을 제공하며, 질의 처리 모델은 이러한 멀티미디어 데이터베이스 클래스에서 관리되는 멀티미디어 객체 및 메타 객체를 효율적으로 추출한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.11a
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• pp.25.1-30
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• 2000

멀티미디어 시나리오는 멀티미디어 응용 프로그램에서 객체의 시간적 공간적 재생 순서와 관계, 그리고 사용자가 멀티미디어 응용 프로그램과 상호 작용하는 방법을 기술하며, 멀티미디어 시나리오 데이터베이스는 이 시나리오를 저장, 관리한다. 시나리오 데이터베이스의 효율적인 관리와 접근을 위해 멀티미디어 시나리오를 계층적 구조로 정의 할 수 있다. 계층적인 멀티미디어 시나리오 구조는 시나리오 객체 정보와 객체간의 관계에 대한 정보가 여러 단위로 공유되고 재사용되는 효과가 있다. 또한, 각 계층을 구성하는 원소들에 대해 시간적 공간적 속성과 관계를 정의함으로써, 시나리오의 구성이 미디어 객체의 관계만으로 기술되었던 시나리오에서보다 복잡하고 다양하게 표현되도록 한다. 멀티미디어 시나리오와 사용자의 상호작용은 시나리오 재생의 제어와 시나리오의 진행 방향 선택에 대해 이루어진다. 본 논문은 멀티미디어 시나리오의 구조를 모델링하고, 웹 기반 환경에서의 시나리오 저작과 재생을 위한 시스템을 구현한다.

• Journal of KIISE:Databases
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• v.32 no.2
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• pp.120-128
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• 2005

Recently main Bioinformatics databases(DDBJ, ENSEMBL, KEGG, etc.) provide analysis tools and data using web services for the convenience of bioinformaticians. Thus, defining SOAP server objects and their methods are very important to provide services for web services. We define SOAP server objects for interaction databases such as BIND, MINT and DIP.

• Korean Journal of Remote Sensing
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• v.26 no.2
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• pp.133-142
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• 2010

As diverse web-based geos-spatial services are developed, the values of technologies and standards related to this trend are also emphasized. In this study, a prototype supporting mandatory components in OGC standard catalog service is designed and implemented, linked to PostgreSQL, open source DBMS. As the main features, XML metadata server was built with the helps of XML query functions in PostgreSQL. Given target applications with geo-spatial data sources and contents, this model can be applied, and it can be used for extension in other external web-based service systems or applications, because it supports international standard specifications.

• The Journal of Society for e-Business Studies
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• v.5 no.2
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• pp.143-150
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• 2000

This paper presents a methodology how to utilize management of research scheduling plan, processing, and results using Web Knowledge Database System, which integrates research knowledge management model under the Research ＆ Development Environment. The content of this paper consists of description on utilization of the Web Knowledge Database System, sharing of the Research Knowledge through design data review, communications, and management of research knowledge flow during the Research ＆ Development Period.

• The Journal of Korean Association of Computer Education
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• v.11 no.5
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• pp.77-88
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• 2008

Having observed the restriction of the current Web technology, the semantic Web has been developed, and it now has grown up with the core help of the W3C to a level where it recommends the OWL Web ontology language. Besides, in order to deduce the information out of OWL data, several inference systems have been developed such as Jena, Jess, and JTP. Unfortunately, however, quite few systems can effectively handle recently developed OWL data, and further, due to the limitation of file-based operation, the current inference systems cannot meet the requirements for handing huge OWL data. An efficient method for storing and searching ontology data is essential for ensuring stable information inference processes. In this study, firstly, we proposed a model based on the database management system to transform and store OWL data and to enable deduction process from the database. Secondly, we designed and implemented an effective OWL storing system based on our model. Finally, we compare our system with the previous inference systems through experimental performance analysis.