• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.826-828
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• 2001

기존의 네트워크에서는 새로운 프로토콜을 개발하고 전개한다는 것은 많은 표준화 절차를 요구하고, 관련 응용에서 모든 요구를 네트워크가 수용할 수 없기 때문에 제한적이다. 액티브 네트워크는 네트워크에 프로그래밍이 가능하다는 것으로 새로운 네트워크의 패러다임으로 등장하였다. 액티브 네트워크는 복잡한 구조를 갖고 있고, 보안상으로 도 많은 문제점을 갖고 있다. 이 논문에서는 액티브 네트워크의 보안 모텔을 소개하고, 보안과 관련된 새로운 옵션을 추가한 패킷모델, 액티브 네트워크의 구조인 실행환경과 노드 운영체제에서의 패킷 처리 과정을 알아본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.816-818
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• 2011

스마트워크 환경을 이용하는 많은 조직의 직원은 스마트워크 기술을 이용하여 외부 위치에서 다양한 작업을 수행할 수 있다. 하지만 외부 네트워크와 외부 호스트에서 보호된 자원에 접근하는 원격 접근 기술과 스마트워크의 본질은 일반적으로 조직 내부에서 접근하는 기술보다 위험하고 스마트워크 사용자가 원격 접근을 통해 내부 자원을 이용하는 것은 위험을 증가시킨다. 따라서 본 논문에서는 안전한 스마트워크 서비스 환경을 구축하기 위하여 보안 취약점을 분석하여 이를 바탕으로 안전한 접근제어 기능을 제공하는 스마트워크 보안 아키텍처를 제안한다.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.274-279
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• 2008

In this paper, we will presents the join procedure for efficient network performance in the ZigBee Sensor Network. In existing network, new devices join procedure is performed base on the participating in the already Coordinator and Router beacon information. However, beacon has insufficient information network. Thus, the concentration of traffic and inefficient use of resources, address the problem that occurs. To solve these problems, the Coordinator and router on the network, depending on their location and the ability to transfer a beacon. This algorithm is proposed in the paper, the transmission time by using the beacon, network configuration control of the network to improve performance.

• Journal of KIISE:Databases
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• v.30 no.3
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• pp.310-319
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• 2003

Workflow is defined as the automation of a business process, and consists of interrelated workflow tasks. Because many modem business processes nay involve activities that are geographically distributed between different departments or organizations, workflow inherently has the characteristics of distribution. In distributed workflow systems, each workflow task performs its assigned role by utilizing information resources placed at some hosts, and then transmits workflow execution control to the next tasks in a workflow definition. Hence, it is very important to appropriately allocate workflow tasks to hosts for high performance workflow processing. In this paper, we propose a multilevel workflow graph partitioning scheme for efficient placement of workflow tasks. This method can improve the performance of workflow processing by minimizing the remote communication costs occurred during workflow execution.

• The Journal of Society for e-Business Studies
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• v.9 no.2
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• pp.145-161
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• 2004

CBD(Component Based Development) can make use of component of block unit that is implementation beforehand and shorten software development cost and time. Also, component can reduce complexity for the large application development because it can hide detail part of internal and offer interface. Common requirement of family in the enterprise framework environment can express workflow, but it is very difficult that express special workflow in single component on various family member's requirement. Therefore, necessity about workflow variability management between component for family member and implementation method had been required constantly This treatise presents implementation techniques for component workflow variability in enterprise framework under .NET base. Presented component workflow variability implementation techniques supposes that commonness business workflow that family can use in enterprise workflow was created already in component, and improve workflow's extensity between component by workflow composition between special component and techniques for practice to various family member.

• The KIPS Transactions:PartD
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• v.12D no.7 s.103
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• pp.1023-1030
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• 2005

CBD(Component Based Development) can make use of component of block unit that is implementation beforehand and shorten software development cost and time. Also, component can reduce complexity for the large application development because it can hide detail part of internal and offer interface. Common requirement of family in the enterprise framework environment can express workflow, but it is very difficult that express special workflow in single component on various family member's requirement. Therefore, necessity about workflow variability management between component for family member and implementation method had been required constantly. This treatise presents implementation techniques for component workflow variability in enterprise framework under Banking Loan Presented component workflow variability implementation techniques supposes that commonness business workflow that family can use in enterprise workflow was created already in component, and improve workflow's extensity between component by worikflow composition between special component and techniques for practice to various family member.

• Journal of KIISE:Databases
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• v.28 no.3
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• pp.395-405
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• 2001

In this paper, we analyze workflow management system in programming language aspects. Many workflow characteristics such as workflow relevant data, workflow control structures, and workflow application invocations are studied and compared with those of distributed parallel programs. Although there exist minor differences between them, we found that there exist surprisingly many analogies between them. Based on this observation, we suggest to view workflow management system as distributed parallel program development platform. This new view on workflow management system provides users consistent view on workflow and workflow management system and with this view workflow management system designer can cope with arbitrary requests from the users keeping design consistency. Moreover the analogy between workflow and program provides a basis to apply program analysis techniques to the analysis of workflow.

• Journal of Internet Computing and Services
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• v.10 no.6
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• pp.205-217
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• 2009

Recently, many organizations such as companies or institutions have demanded induction of very large-scale workflow management system in order to process a large number of business-instances. Workflow vendors have focused on physical extension of workflow engines based on device-level clustering, so as to provide very large-scale workflow services. Performance improvement of workflow engine by simple physical-connection among computer systems which don't consider logical-level software architecture leads to wastes of time or cost for construction of very large-scale workflow service environment. In this paper, we propose workcase-based workflow architecture and implement a very large-scale workflow management system based on the architecture. We prove that software architectures to be applied on a workflow engine have an effect on scalability and performance through workcase response-time evaluation of our proposed system.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.493-496
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• 2006

유비쿼터스 프로파일은 유비쿼터스 환경에서 콘텐츠 적응화를 위해 CC/PP를 확장한 프로파일로서, 프로파일을 구성하는 정보들은 네트워크에 분산되어 존재하며, 생성 시 게이트웨이의 프로파일 관리 저장소에서 통합되게 된다. 이와 같이 프로파일들이 네트워크에 분산되어 존재하기 때문에 통합 및 관리에 어려움을 가지고 있다. 본 논문에서는 효율적인 유비쿼터스 프로파일들을 통합 운영할 수 있는 프레임워크를 설계한다. 제안한 프레임워크는 프로파일 운영 아키텍쳐와 프로파일 처리 기능을 중심으로 설계하였으며, 통합 및 관리를 할 수 있는 기능을 포함하고 있다. 프레임워크는 운영되는 장소에 따라 클라이언트 프레임워크(CF), 유비쿼터스 프레임워크(UF), 저장소 프레임워크(RF)로 구분되며, 특성에 맞는 기능을 가지고 있다. 제안된 프레임워크는 프로파일 생성, 전송, 통합 관리 기능을 가지고 있어, 유비쿼터스 프로파일 운용 시스템 구축에 효율적이다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.238-243
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• 2006

베이지안 네트워크는 주어진 변수들 사이의 확률적 의존성을 분석하는 데에 널리 사용되어지고 있는 모델이다. 이러한 베이지안 네트워크의 활용에 있어서 베이지안 네트워크의 확실성을 분석하는 방법의 필요성이 대두되어지고 있다. 특히 규모가 큰 베이지안 네트워크 모델을 특정하는 상황에서 주어질 수 있는 학습 데이터의 수가 제한되는 경우나, 주된 관심사가 베이지안 네트워크의 일부 부분에 한정되는 경우에 베이지안 네트워크의 확실성에 대한 분석은 유용하게 사용될 수 있다. 본 논문에서는, 베이지안 네트워크에 존재할 수 있는 불확실성을 언급한 후, 베이지안 네트워크 내의 변수들이 갖는 확률분포의 분산을 이용해 베이지안 네트워크의 불확실성을 정의하는 방법을 제안한다. 간단한 베이지안 네트워크의 예시 모델을 이용하여 제안된 베이지안 네트워크의 불확실성 분석 방법이 유용할 수 있음을 보인다.