• Journal of Information Management
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• v.35 no.3
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• pp.139-159
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• 2004

Digital library technology is facing issues such as interoperability, content extension, and the need for a more efficient management environment. A system that is based on standardization and interoperability is required to resolve these issues. Open Digital Library is the system for the next generation that resolves the above problems. We have conducted some research on issues such as OAI and OAI-PMH, which are the basic knowledge behind the Open Digital Library technology and also investigated the Open Digital Library framework, cases of study and implementation of this technology. Finally, we have made some suggestions on the extendability of Open Digital Library technology using the standardized technologies.

• Journal of Korea Spatial Information System Society
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• v.2 no.1 s.3
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• pp.5-16
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• 2000

OGC(Open GIS Consortium) suggests the 'OpenGIS Simple Feature Specification for CORBA' which is the OpenGIS implementation specification for CORBA to specify standard interfaces for reuse and interoperation among distributed heterogeneous GIS resources in the CORBA distributed computing environment. An OpenGIS server that supports this implementation specification moat correctly implement all interfaces defined in the OpenGIS implementation specification to be interoperable with wrapped GISs efficiently. In this paper, we have designed and implemented an OpenGIS server based an object relational GIS, called GEUS that integrates GIS and database technologies to provide spatial data types and spatial operators from the DBMS engine level. In the CORBA distributed computing environment, clients can access geospatial data stored in GIS wrapped by the OpenGIS server through the standard interfaces defined in the OpenGIS implementation specification for CORBA. In addition, clients can use geospatial operation features provided by a back-end GIS and interoperate with other GISs.

• Journal of Navigation and Port Research
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• v.33 no.10
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• pp.709-713
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• 2009

Water pollution of coast has a significant impact on the fish farm and fisheries. For solving the water pollution problems the fish farms are moving to the open sea. The fish farms in open sea have to operate by the automatic feeding system and remote monitoring system for safety and management. This paper describes an automatic feeding system for fish farms in open sea. Water temperature and fish weight will change depending on the amount of feed. And the fish farm temperature is changed extremely in open sea than on land side. This paper described that the feed amount is calculated automatically according to temperature, fish weight, and the automatic feed system. And the performance of automatic feed system is verified with test model for operation test.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.29 no.3
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• pp.119-126
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• 2017

Recently, ground source heat pump systems are being used in buildings for cooling and heating to reduce greenhouse gas and save energy. However, ground source heat pump systems mainly use the vertical closed-loop geothermal system design rather than the open-loop geothermal system design. This is due to a lack of knowledge and few research feasibility studies. In this research, a dynamic thermal analysis numerical simulation based on a standard house model was conducted for an open-loop geothermal system. Based on heating load analysis results, the life cycle costs of a standard house using an open two-well geothermal system were analyzed and compared with a vertical closed-loop geothermal system, and a diesel boiler. As a result, it was found that using an open two-well geothermal system shows economic return on investment after three years.

• The KIPS Transactions:PartD
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• v.14D no.5
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• pp.565-572
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• 2007

In this paper, we developed a VoWLAN(Voice over WLAN) system based on an open source software. The system aims to provide VoIP service over wireless LAN with an IP-PBX server. The features of system presented in this paper are as follows. First, the initial cost for the development is reduced since the system is developed based on open source software. Second, the system provides various additional services such as Voice Mail, Conference Call, and Interactive Voice Response with a software IP-PBX server. Third, the VoWLAN terminal provides high-level user applications with minimal system resources using lightweight open software solutions. Finally, it is highly scalable since it is based on the open source software.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.550-550
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• 2000

This paper proposed a web-based open architecture monitoring system using the Java language. The proposed system can be implemented in any platform and the status of the process can be monitored in a remote station. The proposed scheme have been applied to a steam generator level controller for a nuclear power plant. The result shows the feasibility of the proposed system.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.1147-1154
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• 1993

This paper introduces a case of SCADA System replacing from centralized processing system to distributed/open architecture system. The cons and pros of the distinctive two system configurations were studied and the requirements of new system that would be enable to easily follow 21 century's technical and operational inovation were presented.

• Proceedings of the KSRS Conference
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• 2006.03a
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• pp.41-44
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• 2006

본 연구에서 3차원 지형공간정보의 구축 및 처리, 가시화를 위하여 개인용 PC와 임베디드 단말기의 포켓 PC환경에서 자료 호환 및 동시 운영이 가능한 실시간 3차원 GIS의 Prototype의 설계 및 구현과 적용 실험을 하고자 한다 OpenGL(Open Graphic Library)과 OpenGL|ES (Embedded System)를 활용하여 도시경관을 구성하는 주요객체인 지형, 건물, 교통, 식생 등을 통합적으로 저작 및 3D 객체 모델링 및 렌더링이 통합 및 개별 운영 시스템을 설계하고 구현하였다. 구현 단계에서 개인용 PC 운영환경에서는 기능성 향상에 중점을 두어 공간 데이터베이스 설계, 텍스처 영상 매핑처리, 대용량의 3차원 공간정보 처리 및 관리, 가시화, 렌더링, 모델링 기능들을 제공하며, PDA 휴대용 단말운영환경을 지원하는 모바일 시스템에서는 실시간 모바일 저작기능과 렌더링 기능에 주안점을 두어 개발하였다. 한편 연구 결과로 구현된 시스템은 원도우 XP 기반의 개인용 PC와 PDA 단말기 상에서 3D 객체 자료구조가 호환되어 향후 다양한 응용이 가능할 것으로 생각된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.834-835
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• 2016

In recent years, advances in technology, IT is rapidly growing. Accordingly, real time image processing and multiple platforms, providing compatibility with OpenCV for image processing technology research on actively in progress. At present, different, comparing the images to determine the similarity is low, the system will match the rate of people using the analogue figures to determine the system is for the most part. In this paper, Template Matching of OpenCV and Feature Matching utilizing different images to determine the similarity between digital values for the system. A comparison of the features of a specific point on the screen the image to extract the same feature in a different size, you can compare the features of the target image recognized as compared to three historic castle in comparison, verification. This is the voice and image recognition and analysis, check the matching rate readings than in Zhengzhou treatment techniques are available. The future of forensic and other image processing technologies for OpenCV studies will be needed to feed.

• Bulletin of the Korean Mathematical Society
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• v.49 no.5
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• pp.961-987
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• 2012

A compartment model of the flow driven by pumping without valves (valveless pumping) in an open tank system is proposed. By the open tank system, we mean that two rigid cylindrical tanks are connected with an elastic tube. An incompressible fluid fills this system up to a certain level in tanks under the gravity. The compartment model for analyzing such open system is derived from the energy principle which will be called the energy conserving compartment model or shortly the ECCM. Based on this ECCM of valveless pumping, we explore the occurrence of directional net flow or directional net power by a specific excitation at an asymmetric part of the elastic tube. The interaction between deformable elastic tube and the fluid inside is considered in the ECCM. The reliability of the ECCMis investigated through some physical examples. The ECCM shows the existence of directional net power of the valveless pump system with open tanks and confirms that the direction and magnitude of the net power depend on the pumping frequency as well. Furthermore, the phase synchronization in time between the fluid pressure difference and the external pinching force over the pumping region is highly related to the direction of energy storing or net power.