• 제어로봇시스템학회논문지
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• 제7권1호
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• pp.1196-1204
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• 2001

In this paper, a new architecture of operating software associated with the component-based method is proposed. The proposed architecture comprises 문 execution module and a decision-making module. In order to make effective development and maintenance, the execution module is divided into three components. The components are referred to as Symbol, Gateway, and Control, respectively: The symbol component is for the GUI environments and the standard interfaces; the gateway component is for the network communication and the structure of asynchronous processes; the control component is for the asynchronous processing and machine setting or operations. In order to verify the proposed architecture, and off-line version of operating software is made, and its steps are as follows; I) Make virtual execution modules for the manufacturing devices such as dual-arm robot, handling robot, CNC, and sensor; ii) Make decision-making module; iii) Integrate the modules and GUI using a well-known development tools such as Microsofts Visual Basic; iv) Execute the overall operating software to validate the proposed architecture. The proposed software architecture in this paper has the advantages such as independent development of each module, easy development of network communication, and distributed processing of resources, and so on.

• ETRI Journal
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• 제18권4호
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• pp.265-286
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• 1997

This paper presents a new software development environment that supports an integrated methodology for covering all phases of software development and gives integrated methods with tools for ITUT (Telecommunication Standardization Section of the International Telecommunication Union) languages. The design of the environment to improve software productivity and quality is based on five main concepts: 1) formal specifications based on SDL (Specification and Description Language) and MSC (Message Sequence Charts) in the design phase, 2) verification and validation of those designs by tools, 3) automatic code generation and a safe separate compilation scheme based on CHILL (CCITT High-Level Language) to facilitate programming-in-the-many and programming-in-the-large. 4) debugging of distributed real-time concurrent CHILL programs, and 5) simulation of application software for integrated testing on the host machine based on CHILL. The application results of the environment compared with other approaches show that the productivity is increased by 19 % because of decreasing implementation and testing cost, and the quality is increased by 83 % because of the formal specifications with its static and dynamic checking facilities.

• 정보처리학회논문지D
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• 제10D권1호
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• pp.85-100
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• 2003

오늘날의 컴퓨팅 시스템은 인터넷을 사용하여 비즈니스 거래와 분산 업무 처리로 확대되어가고 있으며 정보 기술은 점차적으로 재사용성과 독립성 그리고 이식성을 가진 컴포넌트를 기반으로 한 응용 개발이 확산되고 있다. 컴포넌트 개발 형태는 코드의 재사용이나 클래스 라이브러리보다 좀 더 발전된 형태의 부품개발 형태로서, CBD(Component Based Development)를 기초로 한다. 그러나, CBD를 이용하여 새로운 컴포넌트를 구축하는 비용의 증가와 함께 비즈니스 요구사항에 맞는 컴포넌트 개발을 위한 노력이 필요하며, 빠르게 정확한 컴포넌트 정보를 웹 상에서 지원할 수 있도록 시스템 측면에서 정규화 형태의 컴포넌트 모델이 요구되고 있다. 본 논문에서는 사용자의 요구사항에 접근하고 웹 상에서 빠르고 신속하게 애플리케이션이 개발되는데 목적을 두고 있으며, 네트워크 상에서 비즈니스 도메인을 기반한 가장 소규모 단위의 분산 컴포넌트를 대상으로 인터페이스 명세를 제공하고자 한다. 분산 컴포넌트 내부와 외부 관계를 담고 있는 명세는 사용자 중심의 컴포넌트를 제공하기 위해서 웹 상에서 요구사항을 작성하고 결국 이들은 조합되어 e-비즈니스 컴포넌트 명세 제공이 요구된다. 따라서 본 논문에서는 사용자가 분산 컴포넌트를 등록하고, 이에 대한 컴포넌트 정보를 검색말 수 있는 e-BCOS(e-Busines Component System)을 설계 구현한다. e-BCOS는 컴포넌트 등록. 검색을 위한 에이전트 시스템으로, 비즈니스 도메인에서의 분산 컴포넌트의 e-비즈니스 컴포넌트 개발을 통해 재사용성을 증대시키고, 웹 상에서 애플리케이션 구축을 빠르고 신속하게 처리될 수 있도록 하며, 사용자가 쉽게 컴포넌트에 관한 정보를 얻고 이해할 수 있도록 해준다. 또한 명세의 공유와 유통을 원활히 하기 위해서 XML(extensible Markup Language)로 명세를 표현하여 사용자의 다양한 욕구를 충족시키도록 한다. 따라서, e-BCOS는 에이전트에 의해서 효율성 증대와 시간 절약 및 신뢰성과 유지보수성을 증대할 수 있는 잇점을 가진다.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2007년도 춘계학술대회
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• pp.131-138
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• 2007

Distributed Group Decision Support System (GDSS) is in the stage between exploration and implementation, there is not unified constructing model. As computer software and hardware, network technique develop, especially the development of object-oriented programming, distributed process, and artificial intelligence, this makes it possible the practical and valid implementation of distributed GDSS. With a view of emphasizing and solving process-supporting, this article discusses how to use the key technologies of network, distributed process, artificial intelligence and man-machine mutual interface, to implement more adaptable, more flexible, and more valid GDSS than before.

• International Journal of Automotive Technology
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• 제5권4호
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• pp.269-276
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• 2004

There has been considerable activity in recent years in developing timing analysis algorithms for distributed real-time control systems. However, it is difficult for control engineers to analyze the timing behavior of distributed real-time control systems because the algorithms was developed in a software engineer's position and the calculation of the algorithm is very complex. Therefore, there is a need to develop a timing analysis tool, which can handle the calculation complexity of the timing analysis algorithms in order to help control engineers easily analyze or develop the distributed real-time control systems. In this paper, an interactive timing analysis tool, called RAT (Response-time Analysis Tool), is introduced. RAT can perform the schedulability analysis for development of distributed real-time control systems. The schedulability analysis can verify whether all real-time tasks and messages in a system will be completed by their deadlines in the system design phase. Furthermore, from the viewpoint of end-to-end scheduling, RAT can perform the schedulability analysis for series of tasks and messages in a precedence relationship.

• 한국정밀공학회지
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• 제15권9호
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• pp.82-92
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• 1998

An international standard for the product model data, STEP, and a standard for the distributed object technology, CORBA, will play a very important role in the future manufacturing environment. These two technologies provide background for the sharing of product data and the integration of applications on the network. This paper describes a prototype CAD/CAE environment that is integrated on the network by STEP and CORBA. Several application servers and client software were developed to verify the proposed concept. The present CAD/CAE environments are composed of several individual software components which are not tightly integrated. They also do not utilize the rapidly expanding network and object technologies for the collaboration in the product design process. In the design process in a large organization, sharing of application resources, design data and analysis data through the network will greatly enhance the productivity. The integration between applications can be supported by two key technologies, CORBA(Common Object Request Broker Architecture) and STEP(Standard for the Exchange of Product Model Bata). The CORBA provides interoperability between applications on different machines in heterogeneous distributed environments and seamlessly interconnects distributed object systems. Moreover, if all the data in the CAD/CAE environment are based on the STEP, then we can exclude all the data conversion problems between the application systems.

• 한국정보과학회논문지:소프트웨어및응용
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• 제27권4호
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• pp.315-326
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• 2000

인터넷이 점차 보급되면서 오늘날의 대부분의 소프트웨어들이 인터넷을 기반으로 하는 분산 어플리케이션으로 변해가고 있다 코바라는 미들웨어를 사용하여 개발하는 방식이 이러한 웹 기반 소프트웨어 개발을 쉽게 해줄 수는 있지만, 소프트웨어의 완성 단계에서 최적화된 소프트웨어의 분산을 도와줄 수 있는 성능검증 방법이 제시되지 않고 있다. 또한, 분산 시스템의 운영 단계에서 동적으로 부하를 조절 하기위한 모니터링 기법이나 부하 분산을 위한 메트릭스가 제시되지 않고 있다. 본 논문에서는 코바 어플리케이션의 실행 사에 객체간의 메시지를 모니터링 할 수 있는 기법과 부하 메트릭스, 부하분산을 위한 메트릭스를 제시한다. 부하를 계산하기위해 어플리케이션에서 발생하는 이벤트들과 그 이벤트들 간의 시간 을 정의하여 부하와 관계있는 데이타들을 추출한다. 추출된 데이타들로부터 부하를 계산하는 공식을 유도 하고 계산된 부하들을 이용하여 부하 분산 메트릭스를 제시한다. 또한 구현사례를 통하여 제시된 모니터링 알고리즘 및 부하 메트릭스와 부하 분산 메트릭스의 적용성과 효율성을 살펴본다.

• ETRI Journal
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• 제32권5호
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• pp.713-721
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• 2010

E-textile technology has earned a great deal of interest in many fields; however, existing wearable network protocols are not optimized for use with conductive yarn. In this paper, some of the basic properties of conductive textiles and requirements on wearable personal area networks (PANs) are reviewed. Then, we present a wearable personal network (WPN), which is a four-layered wearable PAN using bus topology. We have designed the WPN to be a lightweight protocol to work with a variety of microcontrollers. The profile layer is provided to make the application development process easy. The data link layer exchanges frames in a master-slave manner in either the reliable or best-effort mode. The lower part of the data link layer and the physical layer of WPN are made of a fabric serial-bus interface which is capable of measuring bus signal properties and adapting to medium variation. After a formal verification of operation and performances of WPN, we implemented WPN communication modules (WCMs) on small flexible printed circuit boards. In order to demonstrate the behavior of our WPN on a textile, we designed a WPN tutorial shirt prototype using implemented WCMs and conductive yarn.

• 한국멀티미디어학회논문지
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• 제20권11호
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• pp.1785-1792
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• 2017

Generally, big data contains sensitive information about individuals, and thus directly releasing it for public use may violate existing privacy requirements. Therefore, privacy-preserving data publishing (PPDP) has been actively researched to share big data containing personal information for public use, while protecting the privacy of individuals with minimal data modification. Recently, with increasing demand for big data sharing in various area, there is also a growing interest in the development of software which supports a privacy-preserving data publishing. Thus, in this paper, we develops the system which aims to effectively and efficiently support privacy-preserving data publishing. In particular, the system developed in this paper enables data owners to select the appropriate anonymization level by providing them the information loss matrix. Furthermore, the developed system is able to achieve a high performance in data anonymization by using distributed Hadoop clusters.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.619-620
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• 2006

In this paper, the CAE Service System for Collaborative Engineering Environment with web services and Multi-frontal Method has been investigated and developed. The enabling technologies such as SOAP and .NET Framework play great roles in the development of integrated distributed application software. In addition to the distribution of analysis modules, numerical solution process itself is again divided into parallel processes using Multi-frontal Method for computational efficiency. We believe that the proposed approach for the analysis can be extended to the entire product development process for sharing and utilizing common product data in the distributed engineering environment.