• Journal of Internet Computing and Services
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• v.4 no.3
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• pp.57-67
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• 2003

Software product lines are to attain the rapid development of qualify applications by concretizing the general components populated in software assets and assembling them according to the predefined architectures. For supporting the construction of the software product lines, this paper proposes a component code generation techniques based on GenVoca architecture and XML/XSLT technologies, In addition, CompGenX(Component Generator using XML), a component code generation system, is proposed on the basis of this techniques. By providing reconfigurability of component at the time of code generation, CompGenX allows the reusers to create the component source code that is appropriate to their purpose, In this system, the process of the component development is divided into two tasks which are the component family construction task and the component reuse task, For the component family construction, CompGenX provides the feature modeling tool for domain analysis and the domain architecture definition tool. Also, it provides the tool for building the component configuration know1edge specification and the code templates, For the component reuse task, it offers the component family search tool. the component customizing tool and the component code generator. Component code generation techniques and system in this paper should be applicable as basic technology to build the component-based software product lines.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.1402-1405
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• 2005

This paper describes the result of structure analysis of secondary bogie frame. The purpose of the analysis is to evaluate an safety which secondary bogie frame shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Secondary bogie system consist of bogie frame, suspensions, wheel-sets, and brake system. Among these component, the bogie frame is most significant component subjected to the vehicle and passenger loads. The evaluation method is used the JIS E 4207 specification throughout the FEM analysis. The analysis results have been very safety and stable for design load conditions.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.404-409
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• 2005

This paper describes the result of structure analysis and load test for bogie frame. The purpose of the analysis and test is to evaluate an safety which body structure shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Bogie system consists of bogie frame, suspensions, wheel-sets, braking system and transmission system. Among these component, the bogie frame is most significant component subjected to the vehicle and passenger loads. The evaluation method is used the JIS E 4207 specification throughout the FEM analysis and static load test. The analysis and test results have been very safety and stable for design load conditions.

• IE interfaces
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• v.17 no.2
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• pp.149-157
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• 2004

This paper considers a conformity testing problem on EJB(Enterprise JavaBeans). The EJB architecture is a component architecture for the development and deployment of component-based distributed business applications. The objective is to find an optimal test sequence for the conformity test between the EJB specification and an implemented one. For the test sequence, we formulate the problem as a rural Chinese postman tour one and use a linear programming formulation. Based upon the formulations, we suggest a conformance test procedure and show its efficiency by applying the procedure to the CMP(Container- Managed persistency) entity bean of the EJB.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.417-420
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• 2004

As a lot of components are developed by CBD methodology, COTS are activated along with fast technology change of software. In this paper, implemented a view that show class diagram and specification of component in web. For this, we classified components in database and each information is used to retrieve through the view.

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.199-205
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• 2004

This paper describes the result of structure analysis and load test of bogie frame. The purpose of the analysis and test is to evaluate an safety which bogie frame shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Bogie system consist of bogie frame, suspensions, wheel-sets, brake system and transmission system. Among these component, the bogie frame is most significant component subjected to the vehicle and passenger loads. The evaluation method is used the JIS E 4207 specification throughout the FEM analysis and static load test. The test results have been very safety and stable for design load conditions.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.9
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• pp.146-155
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• 1994

In this paper, we desribe a new system, called BEST, that is used to develop a macromodel or behavioral model easily. It automatically calculates the component values of macromodel represented by equations to satisfy the given specification. Also, it gives the way to analyze both the behavioral model and transistor level circuit, and then compare the analysis results of them to check the correspondence under specific temperature and bias condition, and BEST optimizes the component values of macromodel. Other feature is to characterize MOSFET as switch model which consists of PWL-RC network. Finally, it is possible to generage multi-level netlist which consists of macro/switch/transistor level circuits, and user can determine the trade-off between simulation speed and accuracy. With the graphic user interface form of macromodel development system described above. BEST enable designers to make macromodel by themselves and to uas it. We applied BEST to develop the macromodel for the test circuit and got the 18.6 times simulation speed up with preserving the accuracy within 10% compared to the conventional transistor level circuit simulation. Also, applicability of optimization capability was verified.

• Journal of Computing Science and Engineering
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• v.2 no.4
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• pp.340-356
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• 2008

The cognitive constraints of the human mind must drive the decisions in architecture and methodology design in order that the systems we build are comprehensible. This paper presents a methodology for the design of time-triggered embedded systems that leads to understandable artifacts. We lift the design process to a higher level of abstractionto the level of computational components that interact solely by the exchange of messages. The time-triggered architecture makes it possible to specify the temporal properties of component interfaces precisely and provides temporally predictable message communication, such that the precise behavior of a large design can be studied in the early phases of a design on the basis of the component interface specifications. This paper shows how the cognitive simplification strategies of abstraction, partitioning and segmentation are supported by the time-triggered architecture and its associated design methodology to construct evolvable embedded systems that can be readily understood and modified.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.369-372
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• 2005

최근 소프트웨어의 수요가 증가함에 따라 수요를 충족시키기 위한 다양한 응용 소프트웨어 개발 방식 중 컴포넌트 기반 소프트웨어 개발(CBSD: Component-Based Software Development) 기술이 빠르게 발전하였고, 이에 실제 개발된 컴포넌트의 합성을 통한 커다란 응용 소프트웨어 개발이 활발히 진행되고 있다. 또한 컴포넌트들이 서로 정확하게 합성되고, 작동할 수 있는 방법으로 소프트웨어 아키텍쳐 기반의 합성 환경에 대한 연구들이 진행되고 많은 방법들이 제안되었다[1]. 이에 본 논문에서는 지금껏 제안된 아키텍쳐 모델들이 갖고 있는 소프트웨어 개발에 있어 전체적인 흐름파악의 어려움과 변경의 파급효과라는 문제점들을 해결 및 최소화 시킬 수 있는 방법으로 제안된 워크플로우라는 개념을 사용한 소프트웨어 아키텍쳐 모델에 대한 추가 연구와 더불어 아키텍쳐의 명세를 XML로 정의하므로, 명세 구문의 수정 및 확장이 용이하도록 하였다.

• Communications for Statistical Applications and Methods
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• v.10 no.1
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• pp.19-30
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• 2003

Spatiotemporal statistical models are used for analyzing space-time data in many fields, such as environmental sciences, meteorology, geology, epidemiology, forestry, hydrology, fishery, and so on. It is well known that classical spatiotemporal process modeling requires the estimation of space-time variogram or covariance functions. In practice, the estimation of such variogram or covariance functions are computationally difficult and highly sensitive to data structures. We investigate a Bayesian hierarchical model which allows the specification of a more realistic series of conditional distributions instead of computationally difficult and less realistic joint covariance functions. The spatiotemporal model investigated in this study allows both spatial component and autoregressive temporal component. These two features overcome the inability of pure time series models to adequately predict changes in trends in individual sites.