• Title, Summary, Keyword: Distributed Agent System

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An Agent-based Initial Design System in Distributed Environment using CORBA (분산환경에서 CORBA를 이용한 에이전트기반 초기설계 시스템)

  • 이동욱;이수홍
    • Korean Journal of Computational Design and Engineering
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    • v.5 no.4
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    • pp.373-379
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    • 2000
  • This paper deals with the study of distributed design system and the implementation of JAVA based initial design system using CORBA/sup [1-3]/. In the state of initial design, designer should consider other information related to a design part. In this case, designer has a difficult problem to search and calculate distributed data. We propose a special connector named ‘Allocator’and implement an initial design system AIDS(Agent based Initial Design system). AIDS can help designer search and calculate the distributed information. In this study, JAVA and CORBA were chosen for handling network and distribute programming. AIDS focuses on the possibility of incremental concurrent design capability. AIDS is comported of Request-Agent, Calculator-Agent, View-Agent, Search-Agent, and ‘Allocator’. The proposed system can be used for designing initial design of a gripper in the web regardless of operating system.

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Digital Library System by Advanced Distributed Agent Platform

  • Cho, Young-Im
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.4 no.1
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    • pp.29-33
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    • 2004
  • I propose a personalized digital library system (PDLS) based on an advanced distributed agent platform. The new platform is developed by improving the DECAF (Distributed Environment-Centered Agent Framework) which is one of the conventional distributed agent development toolkits. Also, a mobile ORB (Object Request Broker), Voyager, and a new multi agent negotiation algorithm are adopted to develop the advanced platform. The new platform is for mobile multi agents as well as the distributed environment, whereas the DECAF is for the distributed and non-mobile environment. From the results of the simulation the searched time of PDLS is lower, as the numbers of servers and agents are increased. And the user satisfaction is four times greater than the conventional client-server model. Therefore, the new platform has some optimality and higher performance in the distributed mobile environment.

A Study for agent-based Integration Framework in mobile environment (모바일 환경에서 에이전트를 이용한 설계자원의 통합)

  • 옥형석;이수홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.193-196
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    • 1997
  • A mobile computing environment has many difference in character from conventional communication over wired network. These include very presents distributed design system based the mobile agent for mobile computing environment. To integrate design resource, we presented ISA(Integration Service Agent, which allows a designer to build integrated application using distributed resources, and to collaborative by exchanging service. Also we propose ICM(XML based Intelligent Connection Manger) using mobile agent. And suggested new intelligent data and process transfer architecture using ICM to implement an agent based design system in mobile environment.

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Personalized Digital Library System using Mobile Multi Agents

  • Cho, Young-Im;Lee, Sung-Jae;Kim, You-Shin
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.268-271
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    • 2003
  • In this paper, we propose a new framework based on negotiatory mobile multi agent system, and implement a mobile multi agent environment based on DECAF(Distributed Environment-Centered Agent Framework) which is one of the distributed agent development toolkit so as to implement a new PDS(Personal Digital Library System). The new framework has some optimality and higher performance in distributed environments.

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A Control Model for Prototyping Virtual Factory Simulator in Computer Integrated Manufacturing Environment (통합생산환경에서의 가상공장 시물레이터 개발을 위한 제어모형)

  • Namkyu Park;Hyun Jung Lee
    • The Journal of Society for e-Business Studies
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    • v.1 no.1
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    • pp.227-247
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    • 1996
  • Presented in this paper is a control model for developing virtual factory simulator, which is being operated under the distributed environment. The control model consists of production activity plan and information flows. To incorporate elements of the characteristics of the distributed control system, we suggested a collaboration model. This model is working under the client/server architecture, and also designed for cooperative-distributed shop control(CDSC) system in order to exploit several advantages of client/server architecture. Collaboration among each agent(or client) is done through negotiation and task sharing. Based on a contract net model, the CDSC system has three kinds of agents-order agent, resource agent, and communication forwarding agent. Each agent performs shop scheduling and control through negotiation on contract net. No node in CDSC system can have authority over other node. A bidding scheme is employed far negotiation between order agent and resource agents. The CDSC system can support re-negotiation among resource agents and an algorithm for re-negotiation is also developed. Experimental results are shown to advocate the effectiveness of the CDSC system for CIM environments.

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Agent Mobility in Human Robot Interaction

  • Nguyen, To Dong;Oh, Sang-Rok;You, Bum-Jae
    • Proceedings of the KIEE Conference
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    • pp.2771-2773
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    • 2005
  • In network human-robot interaction, human can access services of a robot system through the network The communication is done by interacting with the distributed sensors via voice, gestures or by using user network access device such as computer, PDA. The service organization and exploration is very important for this distributed system. In this paper we propose a new agent-based framework to integrate partners of this distributed system together and help users to explore the service effectively without complicated configuration. Our system consists of several robots. users and distributed sensors. These partners are connected in a decentralized but centralized control system using agent-based technology. Several experiments are conducted successfully using our framework The experiments show that this framework is good in term of increasing the availability of the system, reducing the time users and robots needs to connect to the network at the same time. The framework also provides some coordination methods for the human robot interaction system.

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A Distributed, Open, Intelligent Product Data Management System (분산, 개방, 지능형 제품정보관리시스템)

  • 김영호;강석호;이수홍;유상봉
    • Korean Journal of Computational Design and Engineering
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    • v.4 no.3
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    • pp.210-223
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    • 1999
  • An efficient management of product information is critical to the enhancement of corporate competitiveness. Product information is often distributed in term of organization, geography, and time. With the rapid increase in the use of Internet or its associated Web and intranets, it has been accelerating to integrate the distributed information. In this research, a Distributed, Open, Intelligent Product data Management system, namely DOI-PDM, is developed. This system deals with product information following the STEP standard, and its operation is controlled by a Web-based workflow management system. CORBA is employed to ensure interoperability among distributed objects. It is intended to achieve openness by using various standards, such s STEP, KQML, SGML, and WfMC specifications. One major difficulty in managing it needs also be properly modified according to the dynamics. It however is very hard to have a prior anticipation to the dynamics. It however is very hard to have a prior anticipation to the modification requirements in practice. We introduce a process adaptation model and a use of intelligent agent technology. An agent is delegated to modify process definitions during run-time. A method of agent implementation and a proper communication scheme among te agents are proposed. Also developed in this research is a STEP-based content search system which can co-work with the agents by providing relevant product information that the agents require.

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A Design and Implementation of Fault Tolerance Agent on Distributed Multimedia Environment (분산 멀티미디어 환경에서 결함 허용 에이전트의 설계 및 구현)

  • Go, Eung-Nam;Hwang, Dae-Jun
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.10
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    • pp.2618-2629
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    • 1999
  • In this paper, we describe the design and implementation of the FDRA(Fault Detection Recovery based on Agent) running on distributed multimedia environment. DOORAE is a good example for distributed multimedia and multimedia distance education system among students and teachers during lecture. It has primitive service agents. Service functions are implemented with objected oriented concept. FDRA is a multi-agent system. It has been environment, intelligent agents interact with each other, either collaboratively or non-collaboratively, to achieve their goals. The main idea is to detect an error by using polling method. This system detects an error by polling periodically the process with relation to session. And, it is to classify the type of error s automatically by using learning rules. The merit of this system is to use the same method to recovery it as it creates a session. FDRA is a system that is able to detect an error, to classify an error type, and to recover automatically a software error based on distributed multimedia environment.

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A synchronized mobile agent in Distributed Database Environments (분산 DB 환경에서 동기화 이동에이전트)

  • Kook, Youn-Gyou;Kim, Woon-Yong;Jung, Gye-Dong;Kim, Yung-Chul-R.;Choi, Yung-Keun
    • The KIPS Transactions:PartA
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    • v.10A no.4
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    • pp.313-320
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    • 2003
  • This paper design and implements a synchronized agent mechanism that be able to synchronize SFT (Slow Frequency Transaction) data among e-business processes in distributed environment. This synchronized agent system is adopted to use mobile agent to guarantee the interoperability of the distributed processes and to solve some problems at the client/server architecture and proposes a policy to synchronize data of e-business processes on the any platforms of distributed heterogeneous systems. The proposed synchronization policy is based on the time-stamp transaction with the system priority on the unicasting transportation.

Agent Application for E-Beam Manufacturing System (전자빔 가공기에 대한 에이전트 응용)

  • Lim, Sun-Jong;Lee, Chan-Hong;Song, Jun-Yeob
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.16 no.2
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    • pp.44-49
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    • 2007
  • An agent is an abstract unit for problem solving in the field of distributed artificial intelligence, and an agent-based system is designed and implemented based on the definition of agent as its central concept. Agent modeling is advantageous to abstraction, disintegration and structuring for describing complex system, so its application is increased in various areas including air traffic control, power transmission, e-commerce and medicine. There is no agreed definition of agent but agents have common points as follows: autonomy, reactivity, pro-activeness and cooperation. An agent-oriented modeling is an approach of a concept different form existing object-oriented modeling. This study proposed the agent application for E-Beam manufacturing system. To evaluate the performance of the proposed process design, we used the JADE library. The JADE toolkit provides a FIPA-compliant agent platform and a package to develp Java agents. It provides a basic set of functionalities that are regarded as essential for an autonomous agent architecture.