• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전력기술부문
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• pp.339-341
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• 2008

본 논문은 변전소자동화(Substation Automation : SA)의 국제표준화 동향에 맞추어, IEC61850이라는 국제표준 Protocol을 탑재한 여러 Device의 통신 환경을 구축하기 위해서 개발된 MMS Server Simulator 개발에 관한 소개이다. 본 연구를 통해 개발된 MMS Server Simulator는 MMS(Manufacturing Message Specification) Server의 기능과 함께 Report Control Block, GOOSE (Generic Object Oriented Substation Event) Publisher 등의 기능을 가지고 있다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 B
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• pp.677-679
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• 1999

In this paper, an integration tool for the factory automation communication is proposed. It can apply to three kinds of Fieldbus, Manufacturing Message Specification and Personal Digital Assistance based systems in the factory environment. This paper focuses on the development of the testing tool and object-oriented design concepts for the synthesis of communication modules from the factory level to the field level. The integration of each communication module in the distributed environment gains importance for the realization of heterogeneous information processing systems.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 The Seoul International Simulation Conference
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• pp.453-458
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• 2001

A mobile agent is an autonomous software agent capable of moving from one computer to another while performing its tasks. We view the agent as a discrete event system in the view of its computation and communication. This paper presents a methodology far modeling and simulation of such a mobile agent system as a discrete event system. The methodology is based on the Mobile Discrete Event System Specification (MDEVS) formalism and the associated simulation environment AgentSim which are previously developed by the authors. Within the methodology an atomic model represents dynamics of a mobile agent; a coupled model is modeled as mobile agent servers for representation of structural changes between atomic agents. Being based on the object-oriented environment the modeling methodology exploits inheritance of basic classes AtomicModel and CoupledModel provided by AgentSim.

• 한국지능시스템학회논문지
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• 제17권1호
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• pp.123-129
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• 2007

On the Semantic Web, the content of the documents must be explicitly represented through metadata in order to enable contents-based inference. In this study, we propose a mechanism to convert the Conceptual Graph (CG) into Resource Description Framework (RDF). Quite a large number or representation languages for representing knowledge on the Web have been established over the last decade. Most of these researches are focused on design of independent knowledge description. On the Semantic Web, however, a knowledge conversion mechanism will be needed to exchange the knowledge used in independent devices. In this study, the CG could give an entire conceptual view of knowledge and RDF can represent that knowledge on the Semantic Web. Then the CG-based object oriented PROLOG could support the natural inference based on that knowledge. Therefore, our proposed knowledge conversion mechanism will be used in the designing of Semantic Web-based knowledge representation and inference systems.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.123-126
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• 2001

종합적인 공정 제어 자동화 시스템 구현을 위해 계층적이고 개방형 방식에 의한 시스템 구축이 이루어지고 있다. 상위 계층 시스템은 하위 계층 제어 시스템의 제어기 설정치를 결정하는 방법으로 다양한 의사결정(Decision Making)방법을 도입하여 하위 계층 시스템과 연계하여 계층적인 종합 공정 제어 자동화 시스템 구축을 시도하고 있다. 본 연구에서는 상위 계층 시스템 구현을 위해 신경회로망 방식을 채택한 상위 지능형 제어 시스템을 제안하여 연속형 프로세스의 최적 의사 결정을 효과적으로 할 수 있도록 하였고 이를 실현화 하는데 있어 UML방식의 객체지향 설계방식을 도입함으로써 시스템의 재 사용성 및 확장성을 가지는 개방형 상위 의사 결정 시스템을 개발하였다. 개발된 시스템을 수처리 연속 공정인 약품주입 공정에 적용하였다.

• 제어로봇시스템학회논문지
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• 제8권5호
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• pp.413-417
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• 2002

The Internet technology has been recognized not only as a tool far communication in the 21st century but also as an environment for enabling changes in the paradigm of teaching and learning. This paper describes a web-based system development for chemical engineering education. Simulation and visualization of dynamic systems in the environment of a standard web-browser is made possible by extending its capabilities. ActiveX control is used to simulate the system tool far online representation of Virtual Lab. System that is developed using visual basic. The courseware is classified into tutorial, exercises, and virtual experiments.

• 한국전자거래학회지
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• 제7권2호
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• pp.173-190
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• 2002

Over the past decade, numerous software managers and engineers have been concerned with measuring the size and complexity of software systems. Function point analysis technique is one of the most popular software sizing techniques. A reasonable software development plan through cost and time estimation should be a prerequisite for the successful project at the beginning stage of the project. It is generally known that software size measurement is useful for this kind of estimation and the function point analysis technique would be more effective than the others. However, it is difficult to apply the technique to object-oriented methodology widely used in the software industry. Thus, the purpose of this study is to present a case study on how to apply function point analysis technique to sizing of the software systems based on UML. The results of this study can be useful to managers and engineers.

• 한국전자거래학회지
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• 제3권1호
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• pp.1-22
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• 1998

SDAI (Standard Data Access Interface) is an interface specification of accessing various storage systems such as file systems and database management systems for STEP data. Using SDAI, both application program developers and CAD/CAM system developers can be relieved from dealing with STEP physical file or system dependent DBMS operations. In this paper, we present implementations of SDAI on different data models, i.e., relational, extended relational, and object-oriented. In order to implement SDAI, we need to translate the EXPRESS information model into target data models. The schema translation process for three different data models are compared and other implementation issues are discussed.

• 한국컴퓨터산업학회논문지
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• 제10권4호
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• pp.115-120
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• 2009

온라인상에서 대다수 예약시스템들은 고객들의 만족도를 고려하지 않고 예약이 이루어진다. 이러한 예약 시스템들은 현대 사회에서 중요한 고객들의 만족도를 향상시키기 어려운 문제점이 있다. 본 논문에서는 이러한 예약시스템에서 일어날 수 있는 문제들을 복합 스케줄링 기법에 적용하여 예약시스템들의 문제점을 해결하고자 한다. 예약만족도를 고려한 공연예술 예약스케줄링 기법은 객체지향개념을 기반으로 고객선호도와 예약만족도를 고려하여 예약 스케줄링을 수행한다. 예약 스케줄링은 고객들이 가지고 있는 사건들을 주어진 제약들에 만족하도록 목표인 공연좌석 배치도에 배정한다. 고객들의 만족도를 높이기 위해서 전체 고객들에 대한 선호도보드를 참조하여 고객들의 우선순위에 따라서 공연좌석을 배정한다. 또한, 예약만족도를 고려한 공연예술 예약 스케줄링을 모의 실험하여 고객들의 만족도를 살펴보았다.

• ETRI Journal
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• 제35권6호
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• pp.1038-1047
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• 2013

Augmented reality (AR) is currently being applied actively to commercial products, and various types of intelligent AR systems combining both the Global Positioning System and computer-vision technologies are being developed and commercialized. This paper suggests an in-vehicle head-up display (HUD) system that is combined with AR technology. The proposed system recognizes driving-safety information and offers it to the driver. Unlike existing HUD systems, the system displays information registered to the driver's view and is developed for the robust recognition of obstacles under bad weather conditions. The system is composed of four modules: a ground obstacle detection module, an object decision module, an object recognition module, and a display module. The recognition ratio of the driving-safety information obtained by the proposed AR-HUD system is about 73%, and the system has a recognition speed of about 15 fps for both vehicles and pedestrians.