• Proceedings of the Korea Database Society Conference
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• 한국데이타베이스학회 1994년도 DB산업기술 활성화를 위한 학술대회 및 기술 심포지움
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• pp.49-69
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• 1994

A client/server system has become the computing architecture for the business organization which seeks competitive edges. Technically, a client/server system places application processing close to the user and thus increases performance. This paper's two primary goals are (i) to present a performance model for client/server database systems and (ii) to demonstrate analytically the effectiveness of client/server computing in comparison with other computing architectures via an illustrative example. The model is most likely to be used as a practical performance guide for client/server computing.

• Convergence Security Journal
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• 제3권3호
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• pp.59-66
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• 2003

In this paper the CORBA security services is designed and implemented conforming to the CORBA Security Services Specification. We implemented a Security Information Management system for object-oriented distributed systems based onthe CORBA (Common Object Request Broker Architecture) Security specification baseed on Repository.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 한국경영과학회 1997년도 추계학술대회발표논문집; 홍익대학교, 서울; 1 Nov. 1997
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• pp.33-36
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• 1997

본 연구에서는 공동 작업에 참여하는 작업자들의 업무흐름(workflow)을 관리하기 위한 워크플로우 엔진의 프로토타입을 개발하였다. 분산 객체관리의 표준으로 정착되어 가고 있는 CORBA(Common Object Request Broker Architecture)를 이용하여 네트워크 프로그래밍을 하였으며, JAVA를 사용하여 프로그램의 호환성과 이식성을 높였다. 또한, HAD(heterogeneous and autonomous and distributed) 환경에서 작동 가능하도록 엔진을 설계하였다. 따라서, 공동작업에 참여하는 작업자들이 플랫폼에 상관없이 네트워크를 통해 엔진에 접속할수 있으며, 워크플로우 엔진은 공동 작업을 진행 및 감독할 수 있다. 본 연구에서 개발한 시스템을 설계 작업에서의 변경요청(ECO:Engineering Change Order)이라는 업무흐름에 적용하여 보았다.

• Proceedings of the KIEE Conference
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(II)
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• pp.999-1002
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• 1987

This paper describes the architecture and basic function of alarm system for the TDX-1A digital switching system. Also, it is shown that implemented software structure for alarm treatment employed in distributed control system TDX-1A.

• Proceedings of the KIEE Conference
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.489-491
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• 2000

A DAS(Distribution Automation System) enhances the efficiency and productivity of a utility. It also provides intangible benefits such as improved public image and market adventages. This paper discusses an approach to the integration of NDIS(New Distribution Information System) and DAS that will allow benefits from both technologies to support a common database and distributed computing architecture, thereby improving the ability of many functions to justify implementation of integrated systems based on transferring' data comparisons.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
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• pp.762-765
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• 2000

본 연구는 분산객체기술을 이용하여 전자상거래시스템과 물류시스템의 통합환경을 갖춘 하나의 통합시스템으로 구축하는 것이다. 통합시스템의 구성은 인터넷 쇼핑몰과 자동배차시스템 그리고 분산객체시스템으로 되어있다. 이러한 통합시스템을 구축함으로써 전자상거래 환경 아래서 기업 경쟁력을 확보하고 기업 이윤의 극대화 할 수 있을 것이며 또한 배차정보의 실시간 전달로 고객 만족도를 제고할 수 있을 것이다

• Proceedings of the KIEE Conference
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• 대한전기학회 1992년도 하계학술대회 논문집 A
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• pp.130-132
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• 1992

Many different industries use Supervisory Control and Data Acqisition/Energy Management Systems (Scada/EMS) to guide a wide range of operations and processes. This paper provides an overview of the functions of Scada/EMS and the fundamentals of operation of Scada/EMS. The paper concludes with the current trends toward open systems, distributed architecture, improved man-machine interface(MMl), advanced applications, artificial intelligence(AI), distribution automation, smarter remote terminal units(RTUs)and expended system scope.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.322-326
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• 1991

A real time process control package was developed in an INTEL 80386 based PC and MS OS/2 environment using MS-C and MS-FORTRAN. RTACS(Real Time Advanced Control System), process control computer software for distributed or centralized architectures, is a package which meets functional requirements specified for typical continuous process applications like chemical processes. The package consists of 5 parts, which are DB(data base), OCF(Operator Console Functions), CL (Control logic Library), MSM(Multitasking and Scheduling, Manager) and UAI(User Applications Interface), based upon a table and function block architecture to improve the system performance.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.321-326
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• 1992

In this paper, a high performance graphics system is suggested and its hardware architecture and software structure are described. The developed graphics system is a multi-processing system that uses 6 i860 RISC CPU's and supports PHIGS language in a hardware level. The software is programmed with respect to the graphics pipeline and the software modules are distributed into each processor for the optimization of the performance. The implemented graphics system can draw about 100,000 3D polygons second.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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• pp.158-163
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• 1986

This article surveys techniques and issues related to real time process control system developed for industrial control applications. It covers the system architecture and software engineering issues such as the design of data structures, scheduling of asynchronous task activities, management of shared resources, handling of interrupt and implementing an user friendly man-machine interface. Also problems associated with implementing a real-time system that supports dynamic configuration of data base is addressed.