• Proceedings of the CALSEC Conference
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• 2002.01a
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• pp.448-453
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• 2002

☆1990년대 Object Management Architecture(OMA)활동 초기10년간 Roadmap 제공(CORBA) 1997년 UML 표준작성 MOF, XMI, CWM 등의 기술 확장 ☆OMG의 향후 방향 →Model Driven Architecture MDA를 통한 OMG 플랫폼 기술완성(UML과 CORBA를 포함한) OMG의 proven, neutral, open standardization 프로세서 사용 OMG의 Vertical Market에 대한 직접적인 지원(Healthcare, finance, telecommunications, life sciences research, manufacturing등)(중략)

• Journal of the Korea Society of Computer and Information
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• v.7 no.4
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• pp.40-45
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• 2002

There has been several meaning full efforts to save costs and expand the life-time of a system in changeful If circumstance. It was a module-based architecture that empower productivity at structured programming. It couldn't grow nor evolve, but could raise only calling frequency of module. But OOP or OO-method overcome limit of structured programing by class inheritance and/or overloading and/or over-riding. A component centric architecture, what is mixture of distributed systems, like CORBA. COM+ or EJB/J2EE with OOP. can support not only high reusability or expansion of life-time but also Plug-&-Play between component. In now day. It is not problem of component building but problem of interoperability between heterogeneous CBD Platform. At this study, the enhanced referential component architecture will be suggested.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.580-583
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• 2006

Web application is more plentifully used as the platform based on business software which is complicated and online services. Initially to JSP fields of appears two architecture design terms called model 1 and model 2. These two term are not referred currently to JSP fields of documents but, current be applicable to extensively in architecture design of the web application. In this paper, definition of web application framework and framework pattern, design then design framework the component which it spreads out is executed composition based on consideration facts.

• Journal of the Korea Society of Computer and Information
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• v.13 no.7
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• pp.127-138
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• 2008

Configuration and data management system for weapon system research and development processes should assist concurrent engineering and collaboration activities for various documents, drawings, part informations and product structure informations. In this thesis we defined the system architecture using the CBD methodology and implemented the component based system development process. Most of the configuration and data management systems consist of three layered system architecture which use the general MVC models. In this thesis we defined four layered system architecture based on EJB structure under J2EE environments. Through the four layered system architecture, we break down the general model layer into two detailed business layers and the ordinary control layer into two system dependent layers. With these four layers, we proposed the methodology that detailed the characteristics of the components. Through the CBD approach and the component based development process, we can get the representation model and implement the actual system of the configuration and data management system for weapon system R&D.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.2
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• pp.36-44
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• 2016

In this paper, an Impulse Radio-Ultra Wide band RF Transceiver for WBAN applications is implemented in $0.18{\mu}m$ CMOS technology. The designed RF transceiver support 3-5GHz UWB low band and employs OOK(On-Off Keying) modulation. The receiver employs non-coherent energy detection architecture to reduce complexity and power consumption. For the rejection of the undesired interferers and improvement of the receiver sensitivity, RF active notch filter is integrated. The VCO based transmitter employs the switch mechanism. As adapt the switch mechanism, power consumption and VCO leakage can be reduced. Also, the spectrum mask is always same at each center frequency. The measured sensitivity of the receiver is -84.1 dBm at 3.5 GHz with 1.579 Mbps. The power consumption of the transmitter and receiver are 0.3nJ/bit and 41 mW respectively.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.127-129
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• 2002

EJB(Enterprise Java Beans)는 웹 응용 서버 스펙인 J2EE(Java2 Enterprise Edition)의 핵심으로서, 비즈니스 로직을 컴포넌트 형태로 작성하여 재 사용성을 높이기 위한 서버 측 컴포넌트 프로그래밍 모델이다. EJB는 컴포넌트를 특성에 따라 일반적인 비즈니스 로직을 나타내는 세션 빈(Session Bean), 데이터베이스에 저장된 정보와 같은 여러 클라이언트에 의해 공유되며 영속 장치에 저장되는 엔터티 빈(Entity Bean) 그리고 JMS 메시지를 처리하는 메시지 드리븐 빈(Message-driven Bean)으로 구분한다. 본 논문에서는 ETRI에서 개발한 E504 EJB 서버에서 엔터티 빈의 데이터베이스 접근을 자동화 해주는 영속성 관리자(Persistence Manager)에 대해 논의한다.

• Journal of KIISE:Software and Applications
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• v.33 no.6
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• pp.525-538
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• 2006

Component-Based Software Engineering (CBSE) is widely accepted as new paradigms for building applications with reusable assets. Mismatch problems occur while integrating the assets and make a burden in CBSE. Therefore, a larger-grained reuse unit than a component such as a framework is required, and it consists of relevant components, connectors and domain-specific architecture. The benefits of frameworks over components are commonly known, however, the key elements and internal structure of framework has not been clearly defined. We believe most of the framework models proposed in recent works remain at conceptual level. In this paper, we propose a practical-level framework reference model, and define key elements of frameworks. The research goal is to precisely identify concrete elements of a framework, inter-connection of components within a framework, extended notion of connectors, and tailored meaning of architecture In a framework. Hence, the proposed framework can be practically implemented in common object-oriented languages and with middleware such as lava, J2EE, CORBA Component Model (CCM) and NET.

• Journal of the Korea Computer Industry Society
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• v.5 no.4
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• pp.531-540
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• 2004

Development of Web service application requires the interoperability between various heterogeneous systems, extensibility to allow modification of business environment not of user interface, maintainability, flexibility and reusability As the properties of CBD (Component Based Development) have gradually become clear, attention has started to turn the smooth technology and methodology to solve the existing problems and issues the dynamic responds for the distributed web environments. In this paper, we identify some of the major architectural affecting CBD and describe the Design and Implementation of Security Framework for Application Server with Components. We identify the candidate components, model it using UML and layer it on the architecture. The frameworks will Provide the various security functions, such as incorporating with legacy security systems, supporting of J2EE, JAAS and Kerberos and assisting in increasing the tailorability of component.

• Journal of KIISE:Computing Practices and Letters
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• v.9 no.2
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• pp.133-145
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• 2003

Web applications based on J2EE($Java^{TM}$ 2 Platform, Enterprise Edition) were occurred for solution to overcome the limitations in time and space that the former applications had. Recently, lots of solutions using frameworks are being suggested to develope applications more quickly and efficiently. In this paper, we propose the template for several processes and types, which should be taken in presentation layer of web applications. This idea was based on the fact that web applications developers can concentrate on their specific tasks with independent manner in layered architecture. This template is XML-typed document that shows information about presentation layer of Web applications, which the user wants to compose. This template is inputted to the code generator. After then, the code generator generates skeleton code in presentation layer automatically after parsing information of XML documents. It means that we can develope Web applications more efficiently, by constructing skeleton code which inherits from hot spot classes of framework. Using this template and code generator, developer can develop Web applications with little practice and also is easy to cooperate with other developers to develop them just in time with distributing the standard development process.

• Journal of KIISE:Software and Applications
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• v.30 no.11
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• pp.1025-1036
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• 2003

In industry, it is a current trend that systems are developed by using Enterprise JavaBeans(EJB) technology for reducing the cost and the time. Thus, the architecture of EJB is getting more essential to enhance reusability, extensibility and portability of system. However little has been studied in the realm of the practical software architectures for EJB. The architecture has just bean studied in abstract level, but not in concrete level providing the method to substantiate it using the practical J2EE techniques. Just using the EJB technology doesn't guarantee the reusability of the artifacts because EJB specification provides the characteristics and architecture for only fine grained components as session and entity bean. In this paper, we propose the enterprise software architecture for the systems based on EJB and the concrete techniques for implementing that. Also, design patterns of modeling efficient enterprise architecture are represented. By analyzing both the strengths and the weaknesses of suggested design patterns, EJB design patterns which are suitable for each layer of enterprise architecture will be identified. Through the component which design patterns are applied, the architecture can support the optimized relationship between the components. Five techniques for designing components from fine grained to coarse grained based on EJB technology, and architecture design techniques including transaction and assembling techniques are proposed.