• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.49.2-49
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• 2002

This paper describes the configuration of a multi-agent system that can recognize human intentions. This system constructs ontologies of human intentions and enables knowledge acquisition and sharing between intelligent agents operating in different environments. This is achieved by using a bi-directional associative memory network. The process of intention recognition is based on fuzzy association inferences. This paper shows the process of information sharing by using ontologies. The purpose of this research is to create human-centered systems that can provide a natural interface in their interaction with people.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.250-252
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• 2002

정보가전에 대한 연구가 현재 활발히 진행 중에 있고 정보가전이 실현 되었을 때 다양한 서비스와 연계가 가능하고, 사람들의 생활 환경에 많은 변화가 일어날 것으로 전망된다. 본 논문에서는 정보가전 기반의 건강관리 멀티 에이전트 시스템을 설계와 구현을 기술하였다. 홈 제어 네트워크로는 전력선 기반의 LonWorks를 이용하고, OSGI(Open Services Gateway Initiative)를 이용하여 LonWorks기반의 디바이스들을 제어한다. 멀티에이전트 시스템으로는 FIPA(The Foundation for Intelligent Physical Agents) Specification을 따르고, 이 플랫폼 위에서 건강관리 에이전트, 가전제품관리 에이전트, 건강관리 Library, 요리 Library, 운동 Library를 구현하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.712-714
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• 2005

최근에 PC기반의 온라인 게임과 유무선 연동이 가능한 유비쿼터스 게임기의 개발이 활발하게 이뤄지고 있다. 본 논문은 단순히 연동이 가능한 환경에서 더 나아가 지능적이고 효율적인 게임 서비스를 제공하기 위하여 지능형 멀티 에이전트 시스템과 효율적인 자원 관리 시스템을 제안한다. 유비쿼터스 컴퓨팅 환경에서 지능형 에이전트는 사용자의 주변 환경을 인식하고 사용자의 목적에 적합한 행위를 자율적으로 선택하여 제공할 수 있어야 한다. 또한 메모리 용량이 협소한 자원 관리 시스템을 보완하여 내부의 메모리 공간을 최적의 상태로 유지할 수 있어야 한다.

• Journal of Intelligence and Information Systems
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• v.8 no.2
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• pp.205-227
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• 2002

Our study is focused on a multiple-agent system to provide efficient collaborative work by automating the conference calling process with the help of intelligent agents. Automating the meeting scheduling requires a careful consideration of the individual official schedule as well as the privacy and personal preferences. Therefore, the automation of conference calling needs the distributed processing task where a separate calendar management process is associated for increasing the reliability and inherent parallelism. This paper describes in detail the design and implementation issues of a multiple-agent system for conference calling that allows the convener and participants to minimize their efforts in creating a meeting. Our system is based on the client-sewer model. In the sewer side, a scheduling agent, a negotiating agent, a personal information managing agent, a group information managing agent, a session managing agent, and a coordinating agent are operating. In the client side, an interface agent, a media agent, and a collaborating agent are operating. Agents use a standardized knowledge manipulation language to communicate amongst themselves. Communicating through a standardized knowledge manipulation language allows the system to overcome heterogeneity which is one of the most important problems in communication among agents for distributed collaborative computing. The agents of our system propose the dates on which as many participants as possible are available to attend the conference using the forward chaining algorithm and the back propagation network algorithm.

• Journal of the Korean Institute of Intelligent Systems
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• v.15 no.5
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• pp.567-572
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• 2005

Recently, owing to miniaturization of computer and popularization of internet, ubiquitous computing is attracting considerable attention. In ubiquitous environment, user can receive desired information service anywhere, any time. With the advent of ubiquitous age through popularization of internet, it becomes important how to provide user with ubiquitous environment, and what and how to provide to user. In this paper, method to automatically select device most suitable for user in ubiquitous environment is offered. search agents search peripherals, make a list by function, and transmit to serve. Serve learn the transmitted information through intelligent system. If user input information in the form of linguistic according to the list, serve select device suitable for work environment, and compose the system through IP address. This was realize through practical example, experimented and confirmed.

• Journal of Korea Game Society
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• v.6 no.3
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• pp.13-22
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• 2006

Games such as sports, RTS, RPG, which teams of players play, require advanced artificial intelligence technology for team management. The existing artificial intelligence enables an intelligent agent to have the autonomy solving problem by itself, but to lack interaction and cooperation between agents. This paper presents "Level Unified Approach Method" with effective role allocation and autonomy in multiagent system. This method allots sub-goals to agents using role information to accomplish a global goal. Each agent makes a decision and takes actions by itself in dynamic environments. Global goal of Team coordinates to allocated role in tactics approach. Each agent leads interactive cooperation by sharing state information with another using Databoard, As each agent has planning capacity, an agent takes appropriate actions for playing allocated roles in dynamic environments. This cooperation and interactive operation between agents causes a collision problem, so it approaches at tactics side for controlling this problem. Our experimental result shows that "Level Unified Approach Method" has better performance than existing rental approach method or de-centralized approach method.

• Journal of KIISE:Software and Applications
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• v.31 no.8
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• pp.1073-1082
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• 2004

This paper presents a technique for an agent to adaptively behave to unforeseen and dynamic circumstances. Since the traditional methods utilized the information about an environment to control intelligent agents, they were robust but could not behave adaptively in a complex and dynamic world. A behavior-based method is suitable for generating adaptive behaviors within environments, but it is necessary to devise a hybrid control architecture that incorporates the capabilities of inference, learning and planning for high-level abstract behaviors. This Paper proposes a 2-level control architecture for generating adaptive behaviors to perceive and avoid dynamic moving obstacles as well as static obstacles. The first level is behavior-network for generating reflexive and autonomous behaviors, and the second level is to infer dynamic situation of agents. Through simulation, it has been confirmed that the agent reaches a goal point while avoiding static and moving obstacles with the proposed method.

• Annual Conference of KIPS
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• 2005.05a
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• pp.581-584
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• 2005

에이전트 시스템(agent system) 관련 기술은 이질적이고 분산된 환경에서 상호 운용성(interoperability)을 확보하기 위한 방법이 될 수 있다. 이런 에이전트 시스템의 국제 표준화를 진행해 나가고 있는 단체인 FIPA(Foundation for Intelligent Physical Agents)는 1996년 에 형성되었고, 이질적인 시스템간의 상호 운용성을 최대화하기 위해서 국제적으로 인정된 명세서를 정기적으로 발표하고 있다. 하지만 최근까지 FIPA 표준안은 모바일 ad-hoc네트워크와 같은 환경을 고려하지 못하고 있다. 이러한 환경에서 에이전트는 이질적인 네트워크들에서 제공하는 서비스들을 이용할 수 없다. 이러한 문제점에 초점을 맞추어 본 논문에서는 FIPA 표준을 참고하여 만든 FIPA-OS(Foundation for Intelligent Physical Agents Open Source) 를 수정한 에이전트 플랫폼을 제공한다. 우리는 이러한 에이전트 플랫폼을 이용하여 이질적인 환경에서 제공하는 서비스들에 대한 상호운용성과 에이전트 플랫폼 안에 DM(Discovery Middleware)을 추가하여 확장성을 보장한다. DM은 에이전트가 ad-hoc 네트워크 안에서 동작하는 서비스 디스커버리 기법들을 사용하여 서비스들을 찾고 생성할 수 있게 도와준다. 우리는 다양한 서비스 디스커버리 기법 중 UPnP (Universal Plug and Play)와 LSD (Lightweight Service Discovery Protocol)를 이용하여 DM을 구현하였다. UPnP는 UPnP 포럼에서 개발된 서비스 디스커버리를 위한 프로토콜의 집합이며 LSD는 우리가 만든 모바일 ad-hoc 네트워크에서 동작하는 새로운 서비스 디스커버리 프로토콜로 캐쉬 관리를 강조하여 개발하였다. 우리가 제안하는 DM을 이용하여 수정된 에이전트 플랫폼에서 UPnP와 LSD의 장비에서 제공되는 서비스들을 상호간 이용 할 수 있다.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.3
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• pp.355-362
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• 2009

In this paper, we present a framework for managing group behaviors in multi-agent swarm systems. The framework explores the benefits by dynamic associations with the proposed artificial potential functions to realize complex swarming behaviors. A key development is the introduction of a set of flocking by dynamic association (DA) algorithms that effectively deal with a host of swarming issues such as cooperation for fast migration to a target, flexible and agile formation, and inter-agent collision avoidance. In particular, the DA algorithms employ a so-called systematic singular association (SSA) rule for fast migration to a target and compact formation through inter-agent interaction. The resulting algorithms enjoy two important interrelated benefits. First, the SSA rule greatly reduces time-consuming for migration and satisfies low possibility that agents may be lost. Secondly, the SSA is advantageous for practical implementations, since it considers for agents even the case that a target is blocked by obstacles. Extensive simulation presents to illustrate the viability and effectiveness of the proposed framework.

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