• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.34 no.1B
• /
• pp.74-85
• /
• 2009

We propose an Agent-based Fault Tolerant Object Group model based on the agent technology and FTOG model with replication mechanism for effective object management and fault recovery. We define the five kind of agents - internal processing agent, registration agent, state handling agent, user interface agent, and service agent - that extend the functions of the FTOG model. The roles of the agents in the proposed model are to reduce the remote interactions between distributed objects and provide more effective service execution. To verify the effectiveness of the proposed model, we implemented the Intelligent Home Network Simulator (IHNS) which virtually provides general home networking services. Through the simulations, it is validated that the proposed model decreases the interactions of the object components and supports the effective fault recovery, while providing more stable and reliable services.

• Journal of the Korea Society of Computer and Information
• /
• v.26 no.3
• /
• pp.9-17
• /
• 2021

In this paper, an autonomous multi-agent path planning using reinforcement learning for monitoring of infrastructures and resources in a computationally distributed system was proposed. Reinforcement-learning-based multi-agent exploratory system in a distributed node enable to evaluate a cumulative reward every action and to provide the optimized knowledge for next available action repeatedly by learning process according to a learning policy. Here, the proposed methods were presented by (a) approach of dynamics-based motion constraints multi-agent path-planning to reduce smaller agent steps toward the given destination(goal), where these agents are able to geographically explore on the environment with initial random-trials versus optimal-trials, (b) approach using agent sub-goal selection to provide more efficient agent exploration(path-planning) to reach the final destination(goal), and (c) approach of reinforcement learning schemes by using the proposed autonomous and asynchronous triggering of agent exploratory phases.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.27-28
• /
• 2007

본 논문은 배전계통을 운영함에 있어서 배전자동화 시스템의 가장 중요한 기능인 정전복구 기능에 대해서 현재의 중앙집중 방식에서 분산형으로 보다 효율적인 처리를 위한 알고리즘을 제안하였다. 분산형으로 처리하기 위하여 단말장치들을 Intelligent 기능에 능동 자율학습 기능을 보완할 수 있는 Multi-Agent 기법을 알고리즘에 도입하였다. 기존의 agent 기법을 응용한 연구는 적용 대상이 불분명한데 반해 본 논문에서는 적용 대상도 분명하고 현재 계통에도 바로 적용이 가능한 알고리즘을 제안하였다. 또한 Multi-Agent 기반 분산형 정전복구 시스템의 약점이라 할 수 있는 통신망 보안에 대해서 위협사례들을 분석하고, 이 위협들에 대한 보안알고리즘 적용방안을 제시하였다. 본 논문에서 제시한 알고리즘들을 PC 기반으로 예제계통을 꾸며 그 성능을 입증하였다.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.17 no.1
• /
• pp.39-45
• /
• 2007

In this paper, we developed an intelligent web based e-learning system based on multi agents. To do development of the system, we applied an inclination test that is based on the education theory to do grouping the desirable e-learning community. The proposed system, Intelligent Web based e-learning Multi Agent System (IMAS), is used the multi agents paradigm including learning manner by neural network for grouping of e-learning community and a new distributed multi agent framework proposed here.

• The Journal of Society for e-Business Studies
• /
• v.8 no.1
• /
• pp.55-70
• /
• 2003

With the gradual growth of the electronic commerce various forms of shopping malls are constructed, and their searching methods and function are studied many ways. However, the recent outcome is still inadequate to search for goods for the tastes and demands of customers. To construct the shopping mall on the electronic commerce and help customers with purchasing goods, the efficient interface for the customers to contact the shopping malls should be founded and the customers should be able to search the goods they want. Therefore, in this paper, we designed the Intelligent Integration Agent System (IIAS) using the multi-agent formed by the integration agent which integrates the case based reasoning(CBR) and the rule based reasoning(RBR) and the user agent which manages users' profiles. IIAS performs the rule based reasoning on the subject issue first, then provides the unsatisfying search results from the rule-base reasoning to the customers through the user agent, which enables the search of the goods most similar to the ones that meet the tastes and demands of the customers. That is, the accuracy and the speed has been improved by reasoning with the similarity adjustable integration agent which can pick out the goods of customers wants by modifying the weights of properties according to those of the customers.

• Journal of the Korea Computer Industry Society
• /
• v.5 no.3
• /
• pp.363-370
• /
• 2004

The FIPA community is developing a range of agent-related standards, of which the centerpiece is an Agent Communication Language (ACL). This language includes a number of communicative acts explicitly intended to support negotiation. In this paper, we consider a multi-agent environment that exchanges the resources for achieving agents' goals, represent agents as computational logic-based formalizations, and describe a simple ACL for negotiation using logic-based agents. In particular, we introduce and compare some communication acts that enable counter-agents to know the reason of request(proposal) or the reason of rejection(refusal).

• Journal of the Korea Computer Industry Society
• /
• v.3 no.8
• /
• pp.1049-1062
• /
• 2002

As the distributed resources in the networks have become increasingly popular, the accesses to these resources having been activated. Especially, the accesses to the distributed resources using the mobile agent technologies provide the mechanisms supporting mobility with mobile users as well as the dynamic accesses to the resources in the fixed networks. Proxy-based mobile agent model is defined as mobile agent network model which allocates the hierarchical domains to the distributed resources changed dynamically, assigns one proxy server for each domain, and promotes the management and the cooperation of the mobile agents. In this paper, we introduce the architecture and the execution scenario for proxy-based mobile agent model which is suitable for the hierarchical management domains. In simulation, we evaluate the proxy server's route optimization functionality and the performance reducing execution time of the mobile agents.

• Journal of the Korea Computer Industry Society
• /
• v.6 no.3
• /
• pp.529-538
• /
• 2005

AUML (Agent Unified Modeling Language) is specification anger of agent software system, sight anger, language that do creation by purpose. Do so that may apply Together that is one of automation application program creation system to Agent's BDI in trend sophistication of software, large size Tuesday in this research and investigate this about operation between component system. Standard detailed statement (FIPA:Foundation for Inteligent Physical Agent) that use can consist by data exchange between component and cooperate each other even if type of component is different mutually to base ACL message, and protocole use and study about method and accuracy and consistency that minimize error when embody this using meta model base etc.. through object intention modelling.

• Journal of Intelligence and Information Systems
• /
• v.7 no.1
• /
• pp.123-133
• /
• 2001

Medical domain is very applicable for multi-agent system because medical information systems need much knowledge and close relationship with medical staff, In this paper, we describe design and implementation of an intelligent medical multi-agent platform that provides medical images'information services. This platform supports a physical environment that medical agents can be deployed following FIPA(Foundation for Intelligent Physical Agent)\`s agent management reference model. To use a variety of components on Windows, COM(Common Object Model) interfaces and XML(extensible Markup Language) for encoding ACL(Agent Communication Language) are used for multi-agent communications. Since many kinds of diverse and close relationships with medical staff) are essential, a medical staff is conceptualized as an agent and integrated with multi-agent systems. Also it provides an infrastructure applicable to share necessary knowledge between human agents and software agents in order to make intelligent medical information services easier.

• Journal of the Korea Society for Simulation
• /
• v.22 no.4
• /
• pp.49-55
• /
• 2013

Recently the CGF/SAF (Computer Generated Force / Semi-Automated Force) technology has been getting attention to deal with the increasing complexity in a DM&S(Defence Modeling and Simulation) environment. OneSAF is one of well-known CGF/SAF systems, however, it is not able to support the DEVS framework which is an advanced discrete event based modeling and simulation environment. Especially, most DM&S systems in Korea has been developed on the basis of the DEVS framework. In this paper, we have proposed the agent-based SAF design methodology and tool for supporting DEVS M&S environment. The proposed SAF modeling tool is divided into two parts; the agent modeling part and SAF modeling part. In the agent modeling environment, the modeler can simply create the agent model by writing down the necessary rules. It also provides the agent testing environment so that the modeler maybe conveniently verify the prescribed agent model. The SAF model is finally created by combing the individual agents based on the pre-defined structure. DM&S engineers will be able to employ our tools and modeling methodology to design the DEVS-based DM&S system to be developed.