• The Transactions of the Korea Information Processing Society
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• v.2 no.1
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• pp.12-22
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• 1995

When we integrate schema of distributed local databases, we mean entity integration as central concept of schema integration, and semantic of entity affects several factors. Thus the schema integration in distributed database environment starts from definition of domain relation among entity types of local schemas. Moreover, the domain relation defined by designer needs some works for confidence and validation of schema integration system. But this work was not presented in previous integration system. In this paper, we define object oriented integration for schema integration of local databases in distributed system environment, present models to verify validation on its integration, and implement the validation system.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.298-301
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• 2000

본 논문은 금융상품을 나타내는 자료 객체로부터 분석 모형을 분리해 내고 사용자의 필요에 따라 이들을 자유롭게 통합할 수 있는 객체 지향 구조를 제안한다. 이를 위해 자료와 모형을 효과적으로 다루는 구체적 객체 지향 구성체를 제시한다. 또한, CORBA나 DCOM과 같은 분산 객체 기술을 이용하여 분산 시스템 환경에도 적용될 수 있도록 설계한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.6 no.4
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• pp.71-84
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• 2003

This paper designs and implements an integrated map server to produce an integrated map. Two requirements for the proposed map server are as follows. First, the system should support a customization of metadata to meet user's requirements. The map server designed here will predefine information such as representations, regions required for client-side processing in the metadata. This will allow users easily acquire an integrated map in the required form of clients. Second, the system should be able to support not only the integration of spatial data but also their non-spatial data. Fusion service is realized by using the concept of linking. The integrated map server suggested in this paper can improve the quality of the fusion service by integrating the results of the map servers according to user's requests. Our experiments shows that the integrated map server reduces the response time in web mapping environments.

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.228-232
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• 2016

유/무인기가 통합되어 운용되는 환경을 고려한 시뮬레이션 시스템 설계 방안을 제시하였다. 기존의 관제 공역 내의 유인기를 대상으로 하는 항공 교통 시뮬레이션 시스템의 기능과 무인기 시스템의 기본적인 기능을 고려하였으며, 이를 기반으로 유/무인기 복합 운용의 새로운 개념을 적용하여 모의할 수 있는 시뮬레이션 환경을 구성하였다. 모의 환경의 확장성을 고려하여, 무인기는 관제 공역에 진입하여 유인기와 복합 운용되는 무인항공기 시스템과 비관제 영역에서 운용되는 소형 무인비행장치로 구분하여 구성하였다. 시뮬레이션 시스템을 구현하기 위한 운용 개념에 대해 서술하였으며, 이를 기반으로 필요로 하는 주요 기능 요소들을 구성하고 각 요소에서 고려되어야 하는 주요 요구 사항을 제시하였다.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.293-294
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• 2009

시스템 통합(System Integration) 패러다임의 변화와 MEMS, 네트워크 기술의 발달로 사람, 컴퓨터 그리고 사물이 유기적으로 연계되어 다양하고 편리한 서비스를 제공해 주는 컴퓨팅 기술에 대한 연구들이 진행 되고 있다. 이와 관련하여 지능형 로봇 시스템 환경은 중앙집중 환경에서 분산 환경과 웹이융합된 새로운 환경으로 변화하고 있다. 이를 적용하기 위해서 다양한 연구기관의 개발자 들은 이를 지원할 수 있는 미들웨어의 개발에 많은 노력을 기울이고 있다. 로봇 미들웨어는 다양한 통신 프로토콜, 하드웨어, 운영체제 그리고 프로그래밍 언어의 통합, 통신 오버헤드 그리고 소프트웨어 개발 방법론 등 많은 문제점을 가지고 있다. 본 논문에서는 통합성, 통신 오버헤드, 유연성을 기준으로 기존 미들웨어의 단점을 제시하고 해당 문제점을 해결하기 위한 지능형 로봇을 위한 효율적 미들웨어를 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1126-1129
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• 2010

클라우드 컴퓨팅 서비스 환경에서 인증 및 접근 제어와 같은 여러 보안 이슈가 발생하고 있다. 특히, 클라우드 컴퓨팅 환경에서 다양한 자원에 접속을 할 경우, 통합적으로 관리 및 제어가 가능한 인증 및 접근제어 모델이 필요하다. 이를 해결하기 위해서, 본 논문에서는 상황인식 기반의 통합 인증(SSO) 및 접근제어 모델을 제안하고, 이를 설계 및 구현함으로써, 클라우드 컴퓨팅 환경에서 유연하고, 편리한 보안 시스템을 검증하고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.4799-4804
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• 2013

Green IT technology for the growth of low-carbon green environment and future development of the new technology. Therefore, in this paper, data generated by the security module for RFID applications, smart green building Sung multi-function sensor integrated module that can be integrated environment for building monitoring and management system has been developed. The development of a thermal sensor, temperature sensor, smog sensor, CO2 sensor, O2 sensor, tension sensor and damage detection sensor module with integrated system module integrated multi-functional sensors implemented in the paper. In real-time monitoring by allowing was design and developed system that can be implemented smart green building environment for the environment inside buildings.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.3
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• pp.754-766
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• 2010

In the wireless communication protocols, a network device is responsible for the operation of lower-layers. The network device consists of hardware and software modules, so it can be designed using system-on-chip simulator. The simulator design needs the support of a network simulator as well as system-on-chip simulator, because the network device interact with various higher layer communication protocols. Therefore the co-simulator can become a development environment of the network device through the combining of them. In this paper we propose a co-simulator combining these two simulators. The proposed co-simulator does not degrade performance due to integrations. Also, it is easy to integrate them because the implementation of the kernel is independent.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.10
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• pp.1833-1839
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• 2017

Korea Railway is enhancing the railway wireless communication system from VHF and TRS which have been used for 100 years to LTE-R starting with Ministry of Science and ICT's allocation of Integrated Public Network Frequency on December 2014. LTE-R has advantages on technology performance, also on ease of evolution based on standardization compared to existing technologies. However there are few problems that need to be solved to provide stable railway wireless services in the future. Due to national spectrum policy, LTE-R has frequency interference with Integrated Public Networks (PS-LTE, LTE-M ) and UHD-TV which was commercialized in 2017. This paper introduces performance changes caused by interferences which were founded from the test bed in Wonju~Gangneung LTE-R project and the result of RAN-Sharing. In addition, this paper suggests the standard for LTE-R cell planning in the case of sharing the Integrated Public Network Frequency by analyzing the changes of designed link-budget factor based on the test result.

• The Transactions of the Korea Information Processing Society
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• v.7 no.10
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• pp.3064-3074
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• 2000

Lately computing environment is changing into integrating open system Some corporations and research institutions are still using old codes and not dealing with the rapid canging environment actively. Also several software developers have difficulties with the problems of productivity and translating old codes. This paper proposes Integration Object Management Model to deal with the rapid changing environment effectively and to improe productivity about new software development. The model is divided into three layers the first layer classifies and displays information to users, the second layer controls function, the integrationand management layer, and the last layer manages data, the object management stroage later. So it designs and implenments F77/J++ Generator system(FORTRAN77/Java code generator) for Integrated Object Management Model. The generator helps to translate old codes into new codes in redesigning the business and promoting productivity. In consists of nine-stage strategies using reengineering. This might support agterward protolyping in maximizing the reuse of software, which is advanlage to the integrationof the system and in pro,oting its productivity.