• 한국자동차공학회논문집
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• 제10권5호
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• pp.114-120
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• 2002

In a distributed real-time control system, it is essential to confirm the timing behavior of all tasks because these tasks of each real-time controller have to finish their processes within the specified time intervals called a deadline. In order to satisfy this objective, the timing analysis of a distributed real-time system such as shcedulability test must be performed during the system design phase. In this study, a simple application of CAN fur a vehicle body network system is formulated to apply to a holistic scheduling analysis, and the worst-case execution time (WCET) and the worst-case end-to-end response time (WCRT) are evaluated in the point of holistic system view.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1390-1394
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• 2009

In the paper We have analyzed the case study of the domestic and foreign railway logistic information systems based on the railway logistic to build the information architect basis system of real-time simultaneous. In case of domestic examples, We have analyzed the logistic information system used in Korea Railroad and the information systems of Kyungin ICD(Inland Container Depot) and Busanjin CY(Container Yard). In case of foreign example, we have analyzed the logistic information system of Japanese FRENS(Freight information network system) and the examples of freight tracking using RFID(Radio Frequency Identification). Through the above analysis, We have induced the main problems and improvement methods. We are able to build the railway-oriented information network system for the massive and efficient railway transportation.

• 지능정보연구
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• 제17권3호
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• pp.131-146
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• 2011

오늘의 글로벌 네트워크 비즈니스 환경에서 비서직 종사자들에게 신속 정확한 정보수집 능력과 올바른 판단력은 그 어느 때보다 필요한 역량으로 중시되고 있다. 비서직 업무 수행에 필요한 대부분의 지식은 체험지 혹은 경험지이기 때문에 비서가 주어진 문제를 해결하기 위해서 과거의 비슷한 사례를 참고하는 방법은 매우 타당한 것이며, 경험이나 선례를 적용함으로서 실패할 요인을 줄이고 문제 해결의 질을 높이는 동시에 시간을 단축시킬 수 있다. 본 연구에서는 비서 업무 수행 시 특정 문제 해결에 필요한 정보를 사례기반 추론에 근거하여 현재 문제와 가장 유사한 과거의 사례를 추천하는 시스템(COKRS : Case-based reasoning Office Knowledge Recommender System, 이하 COKRS)을 설계하고 프로토타입을 구축함을 목적으로 한다. 본 연구 결과인 COKRS는 비서직에서 뿐만 아니라 일반 사무영역에서의 지식관리 목적으로도 확대 이용 될 수 있을 것이다.

• 한국전자거래학회지
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• 제6권3호
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• pp.63-80
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• 2001

The construction of the students knowledge in e-Learning systems, namely the student modeling, is a core component used to develop e-Learning systems. However, existing e-Learning systems have many problems to share the knowledge in a heterogeneous student model and a distributed knowledge base. Because the methods of the knowledge representation are different in each e-Learning systems, the accumulated knowledge cannot be used or shared without a great deal of difficulty. In order to share this knowledge, existing systems must reconstruct the knowledge bases. Consequently, we propose a new a Case Markup Language based on XML in order to overcome these problems. A distributed e-Learning systems fan have the advantage of easily sharing and managing the heterogeneous knowledge base proposed by CaseML. Moreover students can generate and share a case knowledge to use the communication protocol of agents. In this paper, we have designed and developed a CaseML by using a knowledge markup language. Furthermore, in order to construct an intelligent e-Learning systems, we have done our research based on the design and development of the intelligent agent system by using CaseML.

• 대한안전경영과학회지
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• 제20권2호
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• pp.65-76
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• 2018

Recently, most of the information system use environment is changing to GUI environment based on windows and web. Most of the development tools for building such a GUI-based information system support object-oriented and event-driven programming concepts. However, there is still a lack of a development methodology that systematically supports event-based information system construction. From a business perspective, an information system is one that supports business processes efficiently and effectively to improve business performance. These business processes are composed of business activities which involve a series of business events. A business event is executed according to a business scenario. Therefore, it is necessary to grasp these events in the requirements analysis stage and to apply it on the system development methodology. However, information systems development methodology which systematically reflect the event processing concept still is insufficient. From this viewpoint, this paper proposes an event-driven scenario-based development methodology that can meet the recent development environment of information systems, and applies the proposed methodology to a small scale information system development case.

• 공학교육연구
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• 제27권4호
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• pp.3-11
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• 2024

This study classified domestic and international systems by type, presenting their key features and examples, with the aim of outlining future directions for system development and research. AI-based learning assistance systems can be categorized into instructional-learning evaluation types and academic recommendation types, depending on their purpose. Instructional-learning evaluation types measure learners' levels through initial diagnostic assessments, provide customized learning, and offer adaptive feedback visualized based on learners' misconceptions identified through learning data. Academic recommendation types provide personalized academic pathways and a variety of information and functions to assist with overall school life, based on the big data held by schools. Based on these characteristics, future system development should clearly define the development purpose from the planning stage, considering data ethics and stability, and should not only approach from a technological perspective but also sufficiently reflect educational contexts.

• 전기학회논문지P
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• 제64권3호
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• pp.138-142
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• 2015

Most of the existing studies on functional safety testing for the railway signaling system software have focused on verifying the functional safety through the monitoring of internal memory embedded railway signaling system. However, the railway signaling system is one of the typical embedded control system in the railway sector, and the embedded software has a characteristic of generating an appropriate outputs through the combination of internal processing in consideration of the current internal status and external input. Therefore, the test approach of using the interface communication channel can be effective way for the functional testing for railway signaling system software in consideration of these characteristic. Since a communication interface specification of the railway signal system has a the properties of the sequence input and output signals, test-case for software testing is the most effective methodology by MSC (Message Sequence Chart) language, one of the graphic language. The MSC-based test-case generating methodology for signaling system software was proposed in this paper.

• 정보과학회 논문지
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• 제43권6호
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• pp.662-667
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• 2016

차량 내 전기전자제어시스템이 급격히 증가하면서 이로 인한 안전사고가 이슈로 부각되고 있다. 그러므로 차량의 안전성을 확보하기 위해서는 개발 초기에 PHA, HAZOP 등을 활용하여 위험원을 식별하고, 이를 예방하기 위한 안전 메커니즘이 구현되어야 한다. 특히, HAZOP은 가이드워드 기반의 체계적인 방식으로 널리 활용되고 있다. 하지만, 시스템이 제공하는 최상위 기능으로부터 오동작을 찾아내기 때문에, 동작 과정상의 위험원을 충분히 식별하지 못한다. 또한 충분히 식별되지 않은 위험원으로부터 안전 요구사항을 정의하기 때문에 테스트케이스 설계에도 제한이 있다. 이에 본 연구에서는 시스템의 동작과정 정의에 유용한 사용사례 기술서와 HAZOP을 적용한 위험원 식별 그리고 안전 요구사항 기반의 테스트케이스 설계 방안을 제안한다. 본 연구의 효용성을 검증하기 위해 차량의 스마트키 제어시스템 사례를 제시하고, 기존 HAZOP 기반의 위험원 분석 결과와 비교한다. 본 연구를 적용하는 조직은 시스템 개발 초기에 위험원 및 안전 요구사항을 충분히 식별하고, 테스트케이스를 설계함으로써 개발 비용을 줄이고, 시스템 품질을 높일 수 있을 것으로 기대한다.

• 지능정보연구
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• 제3권1호
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• pp.101-109
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• 1997

철강제품의 품질설계란 제품의 주문요구조건을 만족시키기 위해 제품의 성분 및 생산공정을 결정하는 과정을 의미한다. 본 연구에서는 품질설계업무를 지원하기 위한 시스템을 개발하였다. 설계업무의 특성을 고려하여 과거사례를 설계에 이용하기 위해, 사례기반추론(Case-based Reasoning)접근방법을 이용하였다. 본 연구에서는 또한 유사사례의 효율적 검색을 위해 품질설계 문제에 적합한 유사성척도를 제안하고 있으며, 문제에 적합한 유사성척도를 제안하고 있으며, 문제에 적합한 지식관리 방법 및 설계조정 방법을 개발하였다.

• 환경위생공학
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• 제14권3호
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• pp.39-53
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• 1999

This thesis is to analyze and assess a new refuse collection system that was based on the term of discharge based quantity and collection of refuse from the beginning on January 1, 1995.In the case study for the refuse collection policy of metropolitan Taegu city based on the year of operation, ie, before 1994, after 1995 and as of 1998, the refuse collection policy analyzed from current position and actual condition. The results of analysis as follows. In case of discharged refuse quantity was show 20.4% reduction than the operation was begun and more 5.8% reduction as of 1998.Under the operation of the refuse collection system, therefore, management of refuse and garbage, the reduction of discharged refuse, activation of refuse collection, Recycling and expansion of financial self-reliance increased efficiency of refuse collection system. In the conclusion, more perfect refuse collection system should be developed of implemented in the near future.