• Magazine of the Korean Society of Agricultural Engineers
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• v.43 no.5
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• pp.83-92
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• 2001

As a result of the recent water resources crisis, development of water management automation system becomes important. This system should be developed with open architecture in order to flexibly meet the spacial and time change of irrigation water demand. Thereby, water management automation system requires open architecture and suitable software program. This study presents an application of object-oriented methodology for Open Water Management Program(OWMP). Accordingly, OWMP provides a high degree of reliability which allows modification of parameters by change of region or time to be possible. OWMP consists of Data Base Management System(DBMS) and Model System. DBMS makes it possible to analyze data related with planning water schedule and establishing database. Model System calculates reservoir inflow, reservoir effluent and basin water demand. An operator decides the reservoir operation with results of Model System and DBMS. OWMP could be adapted to the planning and decision for saving water.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.1097-1099
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• 2015

기존 사물인터넷 서비스는 표준 기술적, 구조적 문제로 사물인터넷의 지향점을 충족시킬 수 없기 때문에, 현재 공통된 서비스를 제공하는 개방형 플랫폼을 기반의 연구 및 개발이 진행 중이다. 이에 따라 사물인터넷 디바이스는 서비스 환경 및 사물의 형태에 따라 다양한 기술의 성숙 및 지능화가 요구된다. 그러나 현재 전 세계적으로 사물인터넷 서비스를 위한 다양한 디바이스가 독립된 방식으로 운용되는 제품이 개발되고 있거나 출시되고 있다. 따라서 본 논문은 차세대 개방형 사물인터넷 플랫폼을 지원하는 IoT 디바이스 인터랙션 기술에 대해 연구하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.580-582
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• 2002

최근 인터넷 관련 기술의 급속한 발전으로 데이터, 음성, 화상 등의 다양한 멀티미디어 서비스가 통합된 개방형 네트워크로 진화되어지고 있다. 모든 미디어가 인터넷으로 수렴되는 NGN(Next Generation Network)으로 발전할 전망이다. 개방형 네트워크는 다양한 유무선 통합망의 융합화에 따른 통신망간의 간섭이 증가하고 네트워크 접속점 중심의 통신망간 접속구조가 확대되어 지금까지의 시스템 보안 위주의 단순한 보안 기술을 적용하기가 어려웠다. 따라서 네트워크 노드간을 효율적으로 보호하는 네트워크 중심의 보안 기술이 필요한 시점이다. 이에 본 논문은 IETF에서 제안한 텍스트 기반 응용 계층의 접속제어 프로토콜로 실시간 미디어 통신을 위한 차세대 인터넷 프로토콜로 주목받고 있는 SIP(Session Initiation Protocol) 시스템을 분석하고, SIP 기반의 보안 메커니즘인 IPSec에서의 확장 보안 메커니즘을 설계하였다.

• 한국벤처창업학회:학술대회논문집
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• 2021.11a
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• pp.173-176
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• 2021

중국 중소기업들은 기업 경영에서 아웃소싱을 광범위하게 활용하고 있다. 이에 따라 아웃소싱을 위한 정보 수집 및 활용 역량은 기업의 성과에 영향을 미치는 매우 중요한 역량으로 작용할 수 있다. 특히, 글로벌 시장에서 이러한 정보 역량은 기업의 수출 경쟁력을 제고하고, 지속가능한 성과 향상의 핵심 역량으로 작용할 수 있디. 이에 본 연구에서는 중국 중소기업의 이러한 아웃소싱 전략을 개방형 혁신 전략의 프레임워크에서 논의하고, 중국 중소기업의 정보수집 및 활용 능력이 기업들이 추진하는 제품 차별화나 원가우위 전략에 미치는 영향을 실증분석 하였다. 또한, 이러한 정보 역량들이 궁극적으로 기업의 최종적인 성과로서 수출성과에 어떠한 영향을 미치는지 검증하였다. 이를 위하여 설문조사를 통해 중국 중소기업 345개사의 응답을 확보하였고, 구조방정식모형(SEM)을 통해 실증분석을 실시하였다. 분석 결과 중국 중소기업들의 정보수집 및 활용 역량은 각각 제품차별화 전략과 원가우위전략의 실행에 긍정적 영향을 미치는 것으로 나타났다. 또한 이를 통해 최종적으로 기업의 수출성과 역시 향상되는 것을 규명하였다.

• Spatial Information Research
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• v.18 no.5
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• pp.75-81
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• 2010

The Urban Planning Information System is the core system in urban planning field which should operate at the national level of network, and requires a close inspection from the initial level of development. Therefore, this study analyzes international standards, domestic laws, preceding plans, as well as the standard system established in 2008, in order to identify the problems and propose directions for the future direction of the Urban Planning Information System. Suggestions from this study can be summarized as follows: (1) to take initiatives to create standards for the development of the Urban Planning Information System, followed by the establishment as international standards, (2) to have the system developed as an open structure, and (3) to comply w ith the preceding plans of related national GIS system to enable integration.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.33 no.8
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• pp.819-825
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• 2009

An open frame structure is fastened by bolt joints for strength and shock attenuation. Therefore the full finite element model of an open frame structure should be properly modeled including bolt joints for strength analysis of the frames and joint assemblies which are operated under multi-loading conditions such as driving, drop, inertia and torsional loads. Then the joints and frames must satisfy the specified allowable strength constraints. Because the full finite element model has a large number of elements to perform strength analysis, a detailed fine bolt analysis seems to be very expensive. Therefore bolts of the full finite element model are approximately modeled by coupling method to constrain degree of freedoms between adjacent nodes. However, the coupling method can exaggerate stress results at the constrained nodes. Thus a detailed bolt analysis and a theoretical/experiential formula of bolts for a worst bolt joint are performed using reaction force applied both bolt and bolt joint. Finally, the results from the two methods are compared and discussed to verify the safety of the open frame structure.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.523-528
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• 2008

An open frame structure is fastened by bolt joints for strength and shock attenuation. Therefore the full finite element model of an open frame structure should be properly modeled including bolt joints for strength analysis of the frames and joint assemblies which are operated under multi-loading conditions such as driving, drop, inertia and torsional loads. Then the joints and frames must satisfy the specified allowable strength constraints. Because the full finite element model has a large number of elements to perform strength analysis, a detailed fine bolt analysis seems to be very expensive. Therefore bolts of the full finite element model are approximately modeled by constraints equations to constrain degree of freedoms between adjacent nodes. However, the constraints equation method can exaggerate stress results at the constrained nodes. Thus a detailed bolt analysis and a theoretical/experiential formula of bolts for a worst bolt joint are performed using reaction force applied both bolt and bolt joint. Finally, the results from the two methods are compared and discussed to verify the safety of the open frame structure.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.6A
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• pp.661-669
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• 2009

Various kinds of shear connectors such as headed stud, channel, perforated steel plate and others are commonly used to transfer stress and conduct composite performance in steel concrete composite structures, and many researches have been conducted to improve the characteristics of different types of shear connectors. It is focused in this study on the pull-out and pushout performance of steel pipe pile cap with the open type perfobond for the composite connection to the spread footing. A parameter analysis was conducted, using ABAQUS, a nonlinear finite element analysis program, to obtain data for determining the characteristics of the structure and to allow various parametric analyses of steel pipe cap with the open perfobond.

• The Transactions of the Korea Information Processing Society
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• v.5 no.5
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• pp.1140-1150
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• 1998

The objective of this paper is to analyze requirements of distributed applications which use the different type of information and support the cooperative work environment between a group of persons in interactive mode, and to provide useful common services for the development of this kind of applications. For this, Interactive Cooperative Application Service as a horizontal service on the application layer and Session Management Service as a support service on the infrastructure layer were defined and designed using the concepts and rules of the Open Distributed Processing system. Application designers may use these services for building those applications which demand the requirements we have characterized in this paper.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.259-262
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• 2000

MSF(MultiService Switching Forum) 개념이 도입된 개방형 시스템 구조를 적용한 고성능 스위칭 시스템 개발이 필요하며, Media Gateway System은 ATM망에서 중저속의 Non-ATM 인터페이스를 수용하는 ATM access multiplexer/concentrator로서 ATM 물리계층 기능, ATM 계층 기능, 회선대행 기능, AAL2 trunking 기능, N-ISDN 연동 기능 및 FR/ATM 연동기능을 제공한다. 본 논문에서는 Media Gateway System에 FR/ATM 연동 기능을 구현하기 위하여 적용할 연동 규격을 살펴보고 FR/ATM 연동시스템 구조를 제안하였다.