• Annual Conference of KIPS
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• 2006.05a
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• pp.1211-1214
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• 2006

유비쿼터스 환경에서 쓰이는 많은 미들웨어 중에서 메시지 기반 미들웨어(MOM: Message oriented Middleware)는 대용량 통신 처리와 비동기 통신, 고가용성으로 인하여 널리 쓰이고 있다. 하지만 이러한 MOM 들은 이벤트 손실에 대한 문제점을 안고 있다. 본 논문에서는 MOM 내에 있는 마스터 큐에서 발생하는 이벤트 손실 문제를 해결하기 위하여 마스터 큐에 이벤트 적재 시간을 조절하는 지연시간을 추가하는 기술을 제안한다. 지연시간은 최적의 값을 계산하기 위해서 다양한 요소들을 변수로 둔다. 그리고 지연시간 추가로 인한 성능저하를 새로운 채널 생성하여 보완한다. 제안하는 방법을 몇 가지 가정을 포함한 시뮬레이션을 통하여 측정, 평가 하였다.

• Journal of Ocean Engineering and Technology
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• v.9 no.2
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• pp.133-140
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• 1995

This paper deals with the residual strength characteristics of composite materials under the environment of high temperature and humidity. Two types of GFRP, one with unidirection and randomly oriented, are used to investigate the features of moisture absorption and the residual strength. The results show that, when exposed longterms in high temperature and humidity, the randomly oriented composites is more stable than the unidirection one.

• Journal of Internet Computing and Services
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• v.8 no.5
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• pp.109-116
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• 2007

Nowadays, with the proliferation of Web services, developer and user can implement a complex application by composing registered Web services. In this trend, the quality of service of a composite Web service is of crucial importance for today's Service Oriented Computing (SOC) environment. But the global optimization of a composite Web service satisfying given QoS is classified to NP-hard problem. To solve this problem, we propose K-way Super node approach and show the effect of it from experimental results.

• Journal of Korea Spatial Information System Society
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• v.11 no.2
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• pp.34-38
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• 2009

Based on the design of the LIS of GuangZhou and BeiJing, this paper discusses the resolution of the LIS with the kernel of process management. It applies the idea of workflow in the management supporting stratum, applies the process-oriented mechanism in the definition, coordination, supervision and control of the management process. The scheme has the character of information-media-oriented, work process dynamic changing supported, application system extended and restructure supported and is independent of the running environment of specific work.. Due to the previous character, the LIS is flexible, useable, elastic and able to support the dynamic application.

• IE interfaces
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• v.18 no.1
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• pp.94-103
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• 2005

Digital Manufacturing is a technology to facilitate effective product developments and agile productions by digital environments representing the physical and logical schema and the behavior of real manufacturing system including manufacturing resources, processes and products. A digital factory as a well-designed and integrated environment is essential for successful applications of this technology. In this research, we constructed a sophisticated digital factory of an automotive company’ general assembly shop by measuring and 3-D CAD modeling using parametric methods. Specific parameters of each objects were decided by object-oriented schema of the general assembly shop. It is expected that this method is very useful for constructions of a digital factory, and helps to manage diverse information and re-use 3D models.

• IE interfaces
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• v.18 no.1
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• pp.1-9
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• 2005

A new logistics concept is needed through the sharing information between suppliers and consumers, which maximizes the customers service and its flexibility by changing functional- oriented to process-oriented. As in many other industries, communication and data manipulation technology have led to systematical change to the logistics industry. One of the biggest changes of the industry that lies ahead is Consolidated Transportation. To improve this systematically false logistical environment, developing an integrated logistics information system with consolidated transportation, framework, standardization, and data integration is essential. However, no party outstands as the leading party for nationwide improvement of logistics, nor does the right analysis and design for it. Therefore, successful nationwide logistics model is yet to exist. This paper provides individual parties, which consider efficient consolidated transportation as their business models, with instructions for logistics information system so that they could be competitive in the market. It also helps companies collect user requirements for efficient consolidated transportation, and utilize it for its development. Finally, this paper extracts the design of algorithm for the efficient consolidated transportation.

• Journal of the Korean Operations Research and Management Science Society
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• v.24 no.3
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• pp.13-26
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• 1999

Recently, information technology and information system(IS) are rapidly diffused throughout the world. In the global competitive environment, the success of IS becomes the important one among the critical success factors(CSF) of the firm. For achieving it, the firm must continually involve itself in the quality evaluation and improvement of IS. The quality concept was changed into the customer-oriented quality one. There is no exception to the quality of IS. In the past, IS quality was determined by the IS developer or IS department offering service. Now it is evaluated by the user of IS service, and then the customer-oriented user satisfaction becomes an important issue. The purpose of this study is to develope the total quality evaluation model of IS through TQM approach. First, all success factors of the domestic IS are extracted from the foreign and domestic literatures of IS success factors contained the technical and behavioral aspects. And the extracted factors are classified with evaluation levels for quality evaluation and developed into a total quality evaluation model. Finally the model usefulness is analyzed.

• Journal of the Korea Computer Industry Society
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• v.4 no.12
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• pp.937-942
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• 2003

Component development of EJB base is activated newly been using widely object oriented analysis and design method recently. Usually, case that use permanent data that use database in EJB base bean creation is much. Separated DBMS connection that various DBMS is applied been subordinate to each entity bean used in the environment in this paper applying DAO pattern, and is normalized object oriented design and analysis because using UML and standardization so that can create done class optimized modelling do.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.537-540
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• 2007

분산된 서비스의 통합의 중요성이 커지고 있는 최근의 유비쿼터스 환경에서 SOA(Service Oriented Architecture)의 구현기술인 웹 서비스는 이러한 분산된 서비스를 연계하는 표준기술로서 기업내, 외부뿐만 아니라 방송/통신 융합, 정보가전/홈네트워크, 임베디드 환경 등 다양한 분야에서 사용되어 지고 있다. 본 논문에서는 홈네트워크에서 사용되는 디바이스등을 상호 이질적인 플랫폼이나 프로토콜에 유연하게 제공하기 위한 서비스 변환 게이트웨이 역할을 하는 SCG 엔진(Service Convergence Gateway Engine)과 서비스 연계의 표준기술로 자리잡고 있는 웹 서비스를 기반으로 SOA를 지원하고 S/W Service와 Application Component간의 연동을 위한 경량화된 Backbone의 역할을 수행하는 ESB(Enterprise Service Bus)를 사용하여 서비스를 통합하고 관리하는 구조를 제안 한다.

• Convergence Security Journal
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• v.5 no.3
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• pp.67-73
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• 2005

Security requirements must be defined well to reduce software vulnerabilities in requirement specification phase. In this paper, we show how to specify security requirements in structured manner for object-oriented development methodology. Our method specifies security requirements through four phases: defining security objectives, identifying the threat, construct attack tree, and specifying security function. This method would help developers to specify security requirements and functions which software have to possess clearly and systematically.