• Journal of KIISE:Software and Applications
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• v.29 no.12
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• pp.895-906
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• 2002

Due to increased concern about the distributed web application, the interest in EJB - server-side Java component architecture that enables to make out Business Logic without writing codes related to complicated distributed framework - is also increasing. Despite of these increased interest, However, efforts for reliability of these systems have been insufficient. Thus, in this paper, we propose specification technique for applying DbC approach, which can elevate the reliability of software in the Object-Oriented system development, in writing formal specification of EJB-based application. Through this specification technique, developers can gain reliability in the EJB-based application development.

• Journal of Korean Society for Quality Management
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• v.28 no.4
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• pp.29-46
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• 2000

Advent of the distributed computing has contributed to the rapid distribution of information technology throughout the organization. While powerful and user-friendly information technology are more available to end users, managing the distributed, heterogeneous IT environment has become a serious problem for corporate IT managers. Integrated Control Architecture (ICA) enables the monitoring and controlling of the dispersed information resources for effective enterprise-wide information resource management. This paper empirically examines the propositions that the level of information resource control is positively related to IS effectiveness measured in user satisfaction. Measures are developed and validated for the control of information resource object such as data, application, platform, and control of relationships among such objects. Results from a study of 130 organizations support that the organizations with high information resource control exhibit user satisfaction.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2001.10a
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• pp.257-262
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• 2001

As computer-related technologies have been developed, legacy design systems have not been appropriate for new computing environment. Therefore, it is necessary that most of them are either modified or newly developed. However, this requires quite much amount of cost and time. This paper presents a method of extending legacy design system without modification using XML and XSLT. In order to apply the developed method, a good example of legacy design systems, AGMA gear rating system has been extended so as to be suitable for the distributed computing environment. An XML document for AGMA gear rating process is defined. It is transformed to the form of the input document of AGMA gear rating system by XSLT processor according to the transformation rules defined in the AGMA gear rating XSLT document. After that, AGMA gear rating system reads this input document and generates an output document in the server. These operations are automatically executed by the external legacy system controller without user interactions. Using these operations, AGMA gear rating web service has been developed based on SOAP and WSDL to provide the functions of legacy AGMA gear rating system through the distributed network. Any system or user can implement AGMA gear rating process independently to the platform type, without making it for oneself, by simply referring the AGMA gear rating web service via Internet.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.792-799
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• 2003

As eTransformation and collaborative eCommerce have been on the rise, business processes between business partners are increasingly recognized as important assets that need to be integrated. These trends imply more complex and dynamic business processes should be considered in order to integrate related business organizations and business units. Moreover, these business processes are widely distributed across stakeholders. Therefore, there is a need for business process modeling that is usable, flexible and capable of integrating systems consistently across businesses and technology barriers. In this paper, a business process modeling methodology is introduced, which is based on top­do\W and model-driven approach utilizing OMG's MDA(Model-Driven Architecture) and UML profile for EDOC(Enterprise Distributed Object Computing). This provides the ability to model business process at all levels simultaneously, to combine business process models retaining their meaning, to use business process design patterns constraining the behavior of sub-processes, and to derive specific codes from a stable model as the underlying infrastructure shifts over time. In addition, we suggest some modifications of the meta-model for EDOC-Business Process Profile by adding new features in order to model business processes rigidly. This paper illustrates some examples of business process modeling and compares them with UML diagrams and IDEF models. The proposed methodology is implemented to develop a business process modeling tool.

• Journal of Korea Spatial Information System Society
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• v.1 no.1 s.1
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• pp.19-28
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• 1999

The focus is moving from the problem of building data to the problem of accessing and efficient utilization of data fitting to the purpose of a user. A distributed technology and a standard of geodata and geoprocessing is needed to satisfy these needs. This paper suggests an implementation method of a standard interface defined by OpenGIS with CORBA which is a distributed object technology. A client can invoke Open API of the middleware implemented with CORBA through IIOP. CORBA server objects which provide a client with Open API is the essence of an interoperability. CORBA server objects wrap the data formats and access methods of different GIS engines, and translate the data formats of different data servers to a standard data format.

• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.78-84
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• 2002

In this thesis a shipping broker agent system, which can be executed by a CORBA-based environment using the distributed object technique, CORBA is designed and implemented Nowadays, while the EC system is extensive on the web, legacy host systems have limitations and its capacity-upgrade os required. In order to solve these problems the method that distributes programs into several computer systems can reduce their loads, set low system capacity and minimize network bottleneck. In this thesis using Agent Communication Language(ACL), we propose an agent based prototype and implement an intelligent agent prototype for ships search using CORBA, which can exchange and shiare data between different systems.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1351-1354
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• 2005

분산응용을 개발하는데 효율적인 환경을 제공해주는 분산 객체그룹 프레임워크(Distributed Object Group Framework)를 이용한 분산 프로그램 개발 Tool-Kit을 구축하였다. 본 Tool-Kit은 분산응용 개발자들에게 DOGF의 기능을 쉽게 이용할 수 있도록 지원하기 위해 객체그룹 운영자 GUI, 서버 프로그램 개발자 GUI, 클라이언트 프로그램 개발자 GUI등 3가지 GUI로 구축하였다. 분산응용의 개발 시, 서버 프로그램 개발자는 서버 객체들 구현한 후 프레임워크에 등록 및 클라이언트에 대한 접근권한을 부여하고, 클라이언트 프로그램 개발자는 자신에게 접근권한이 부여된 이들 객체 또는 객체그룹을 검색하여 클라이언트 프로그램을 작성할 수 있도록 지원한다. 본 논문에서는 분산응용 개발 시 이용되는 Tool-Kit과 DOGF의 상호동작을 정의하고, 분산 프로그램개발 Tool-Kit을 구축하고, 간단한 분산응용을 이용해 Tool-Kit의 수행성을 보인다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.773-776
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• 2005

본 논문에서는 그동안 연구 및 개발해온 분산객체그룹 프레임워크로부터 새로운 분산서비스들을 추가한 확장 분산객체그룹 프레임워크를 제안한다. 확장 분산객체그룹 프레임워크는 기존 프레임워크의 구성요소들과 이들에 의해 제공되는 서비스들은 그대로 유지하고, 분산 프로그램 개발 툴(Distributed Programming Developing Tool, DPD-Tool), 모바일 프락시 및 컨텍스트 제공자 구성요소들을 새롭게 추가하였다. 각 구성요소의 제공 서비스를 살펴보면, DPD-Tool은 분산객체그룹 프레임워크의 지원을 받아 클라이언트, 서버 프로그램 개발자 및 분산응용 관리자 GUI를 통해 쉽고 편리하게 분산 프로그램을 개발할 수 있는 도구이다. 모바일 프락시는 분산응용 서비스를 요청하는 이동 사용자의 위치를 기반으로 서비스 수행의 연속성을 지원한다. 그리고 컨텍스트 제공자는 하드웨어 기기 및 센서들로부터의 상황인식 및 추론 기술을 제공한다. 또한, 본 확장 프레임워크는 분산자원의 특성에 따라 다양한 속성정보를 통합 관리하기 위한 정보저장소 기술을 포함하며, 기존서비스 뿐만 아니라 새롭게 추가한 분산서비스들의 지원을 통해 분산응용의 수행성을 보장하도록 한다. 결론적으로 본 연구에서는 다양한 분산서비스에 맞추어 상황별로 적응 지원이 가능하며, 분산 프로그램을 용이하게 개발할 수 있는 도구를 함께 제공하고 있는 통합 프레임워크를 제시한다..

• IE interfaces
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• v.10 no.3
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• pp.63-73
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• 1997

This paper presents requirements for workflow management systems supporting CITIS. We propose an architecture of global workflow management system which aims at supporting external workflow among different organizations rather than internal one. The architecture consists of five key elements, that is process definition language, process graphic design tool, control engine, status monitoring tool, and interface models. For each of these elements, implementation requirements are presented and its major functions are described. A key concept to the CITIS standard is the integration of disparate systems in distributed environment. This leads us to place a special emphasis on the interface models that can enhance the interoperability between externally participating workflow systems. Two interface models for the global workflow management system are explained. CORBA, the most widely accepted standard for distributed object management, can be adopted to facilitate the integration. World Wide Web can be used for the underlying platform on which information is exchanged and the status of processes instances is monitored. The workflow management system can provide a ready and easy access to and management of the data for CALS environments.

• The Transactions of the Korea Information Processing Society
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• v.3 no.6
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• pp.1515-1521
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• 1996

Object-oriented and distributed processing methods are adopted next -generation telecommunications management architecture. In this paper, we design and implement gradual federation function on connection management system providing connection services to transport network for interworking and encapsulated trader and gateway function for testing interoperability of these service objects between distributed processing environments. These techniques are practically applicable to support interworking between heterogeneous management network systems according to a tendency of integrating telecommunications management systems.