• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4379-4397
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• 2017

Three different improvements of the Velocity-based model were proposed in a minimal velocity-based pedestrian model. The improvements of the models are based on the different agent forms. The different representations of the agent lead to different results, in this paper, we simulated the pedestrian movements in some typical scenes by using different agent forms, and the agent forms included the circles with different radiuses, the ellipse and the multi-circle stand for one pedestrian. We have proposed a novel model of pedestrian dynamics to optimize the simulation. Our model specifies the pedestrian behavior using a dynamic ellipse, which is parameterized by their velocity and can improve the simulaton accuracy. We found a representation of the pedestrian much closer to the reality. The phenomena of the self-organization can be observable in the improved models.

• 한국자동차공학회논문집
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• 제12권5호
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• pp.125-135
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• 2004

The validity of simulation has been well-established for decades in areas such as computer and communication system. Recently, the technique has become entrenched in specific areas such as transportation and traffic forecasting. Several methods have been proposed for investigating complex traffic flows. However, the dynamics of vehicles and their driver's characteristics, even though it is known that they are important factors for any traffic flow analysis, have never been considered sufficiently. In this paper, the traffic simulation using a multi-agent approach with considering vehicle dynamics is proposed. The multi-agent system is constructed with the traffic environment and the agents of vehicle and driver. The traffic environment consists of multi-lane roads, nodes, virtual lanes, and signals. To ensure the fast calculation, the agents are performed on the based of the rules to regulate their behaviors. The communication frameworks are proposed for the agents to share the information of vehicles' velocity and position. The model of a driver agent which controls a vehicle agent is described in the companion paper. The vehicle model contains the nonlinear subcomponents of engine, torque converter, automatic transmission, and wheels. The simulation has proceeded for an interrupted and uninterrupted flow model. The result has shown that the driver agent performs human-like behavior ranging from slow and careful to fast and aggressive driving behavior, and that the change of the traffic state is closely related with the distance and the signal delay between intersections. The system developed shows the effectiveness and the practical usefulness of the traffic simulation.

• International Journal of Contents
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• 제16권3호
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• pp.51-65
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• 2020

Narratives arouse diverse and rich affective responses to recipients, and this is one of the reasons why narratives are universal and popular. Computational studies on narratives have established a formal model or system of the affective response based on the theory in psychology or media research, and have analyzed or generated a narrative that can evoke a specific affective response. In this paper, we propose a new computational model that can detect the affective response expected to appear in the narrative based on the narrative agent's knowledge. First, we designed a narrative representation model that can elaborately express the event structure and the agent's knowledge as well. Additionally, an analysis method was proposed to detect the three affective responses and the related situational information. Then, we validated the model through a case study about an actual movie narrative. Through the case study, we confirmed that the model captures the affective responses of the audience. The proposed model can be effectively used for the narrative analysis and the creation that must consider the affective responses of the recipient.

• 한국통신학회논문지
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• 제23권5호
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• pp.1360-1371
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• 1998

ATM 교환기 관리를 위한 TMN 시스템의 개발에 있어, ATM 교환기와 관리 대행자간의 구조적 결합 방법에 따라 여러가지 형태의 구현 방법이 존재할 수 있다. Embedded Agent와 Gateway Agent와 같은 분류가 그 대표적인 것이라 하겠다. 지금까지의 TMN 시스템의 개발에 있어, 이들 구현 방법들에 대한 객관적 평가를 통한 적절한 구현 모델의 선택이 거의 이루어지지 않았다. 본 논문에서는 ATM 교환기를 위한 관리 대행자 시스템의 개발에 있어, 가장 먼저 선행되어져야 할 구현 모델 선택을 위해, 5가지의 구현 모델을 설정하고, 각 구현 모델에 대해 MIB 구현 측면, ATM 교환기 내부 프로토콜 측면, 구현의 용이성 측면을 평가한 후, 가장 적절한 구현 모델 하나를 선택하였다. 또한 이 선택된 모델을 기초로 관리 대행 시스템을 구현하였고, 구현 모델의 이점을 극대화하기 위한 관리 대행자와 교환기간의 인터페이스 모델을 제안, 구현하였다. 또한 구현된 관리 대행 시스템을 실제 TMN 관리 시스템에 적용하여 그 성능을 평가하였다.

• 한국건축시공학회지
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• 제7권3호
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• pp.123-130
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• 2007

This study investigated the fundamental properties and shrinkage properties of high performance concrete with water/binder ratio of 0, 30 and with combination of expansive additive and shrinkage reducing agent. According to the results, the fluidity of high performance concrete showed lower the using method in combination with expansive additive and shrinkage reducing agent than the separately using method of that, so the amount of superplasticizer increased when the adding ratio of expansive additive and shrinkage reducing agent increased. However the air content of concrete increased when used in combination with expansive additive and shrinkage reducing agent, so the amount of AE agent decreased. The compressive strength showed the highest at 5% of expansive additive, and decreased with an increase of the amount of shrinkage reducing agent. Furthermore, in order to reduce the shrinkage of high performance concrete, it was found that the using method in combination with expansive additive and shrinkage reducing agent was more effective than separately using method of that. Autogenous shrinkage was predicted using JCI model. Because JCI model is unable to consider the effect of EA and SRA, correction factor should be added to enhance the accuracy.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.16-22
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• 2001

There is no doubt that agents play an increasingly predominant role in e-commerce, whether these are business-to-consumer or business-to-business applications. However most of the current e-commerce agents only support a single bid for a product at a fixed price. Although price is an important factor, it is not the only concern of both business and consumer. There is doubt as to whether such agents satisfv both parties. Negotiation on a variety of issues is needed in order to reach an agreement. In this paper, a computational agent negotiation(CAN) model is proposed to facilitate multiple-issue negotiation via an agent. The main contribution of the CAN model is it enables agent to participate actively in the negotiation with various feedback instead of simply an agreement or rejection.

• 한국콘텐츠학회논문지
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• 제4권1호
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• pp.67-75
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• 2004

본 논문은 공개키 기반구조(PKI-Public Key Infrastructure)에서 중추적인 역할을 담당하는 공개키 인증시스템을 설계하고 구현한다. 본 논문에서는 인증기관의 역할을 수행할 수 있는 공개키 인증시스템의 요구사항 및 특징을 분석하여, 실제 인증 서비스가 제공 가능한 인증과정은 HA및 FA한테 위임하고 설계한다. 인증 구조는 Root CA와 Home agent 및 Foreign agent로 구성되어 있고, 필요할 때 CA은 위임권을 HA나 FA한테 전송한다.

• 한국시스템다이내믹스연구
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• 제5권1호
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• pp.5-33
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• 2004

This study explores how agents would make decisions responding to control mechanism in contractual relationship of their firm. Focusing on agent's averse behavior against control, system dynamics model for agent's opportunistic behavior is developed in view of agent theory and control theory. This SD model shows that control mechanism by contracts doesn't always play a positive role on corporate decision-making process and Control, especially in the over-controlled contracts, often makes a paradox accelerating agent's opportunistic behavior unexpectedly. This paradox provides us both theoretical and practical implications for the relationship between control mechanism and autonomous behavior for sustainable corporate management.

• 한국산학기술학회논문지
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• 제3권4호
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• pp.313-318
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• 2002

전자 상거래와 같이 통신 보안이 요구되는 응용 분야에 에이전트 기술을 효과적으로 적용하려면 에이전트 기술과 보안 기술의 결합이 요구된다. 본 논문은 공개키 기반 구조 기술과 에이전트 기술을 결합하여, 기밀성(privacy), 완전성(integrity), 신원 확인(authentication), 부인 방지(non-repudiation)등의 보안 기능을 지원하는 다중 보안 에이전트 엔진 모델을 제안한다. 각 에이전트는 구조적으로 에이전트 엔진 계층과 에이전트 응용 계층으로 구성된다. 제안한 보안 에이전트 모델의 설계에는 자가 송수신 메시지, 보안 채널 그리고 에이전트 응용 계층에서의 KQML(Knowledge Query and Manipulation Language) 메시지와 에이전트 엔진 계층에서의 메시지의 구분이라는 개념들이 사용되었다. 제시된 보안 에이전트 엔진 모델이 제공하는 에이전트 언어는 기존 에이전트 언어인 KQML의 내용층 및 메시지층에 대한 아무런 수정이나 제약 조건 없이 통신 계층만을 확장하여 보안 기능을 표현하며, 에이전트간의 보안 통신은 에이전트 언어 상에서 투명하게 표현되는 보안 채널을 통해 이루어진다는 특징을 갖는다.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2002년도 춘계학술대회 논문집
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• pp.222-229
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• 2002

기존의 공급망이 디지털화되고 고객과 공급자간의 파트너쉽과 정보흐름에 있어서 고성능의 네트웍을 형성하는 새로운 개념의 네트 퀀을 가치넷 (value net)으로 정의한다. 이러한 가치넷은 고객이 그 중심에 위치하며 연관되는 제조 사이트와 공급자에 이르는 정보의 배분을 원활하게 해 준다. 본 연구의 목적은 복잡한 공급사슬의 흐름과정에서 발생하는 의사결정과정을 자동화하고 효율화하기 위해서 멀티에이전트를 이용한 프레임 을 설계하고 구매업무와 관련된 영역에 대하여 본 시스템을 구현해 보고자 하는 것이다. 에이전트의 지능적 판단을 위해서는 BDI (Belief, Desire, Intension) 모델을 이용하였다. 본 연구의 결과는 B2B 및 e-Business에서 에이전트를 이용한 조달 및 획득과 관련된 업무에 적용이 될 수 있다.무에 적용이 될 수 있다.