• 한국전자거래학회지
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• 제14권4호
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• pp.133-148
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• 2009

다수의 구매자와 판매자가 존재하는 경매분야에서 효율적인 협상에 대한 새로운 에이전트 협상방법론을 제시하였다. 경매문제를 게임이론으로 재 정의하고 이를 에이전트 협상에 적용하여, 온라인 티켓 재판매 시장 문제에 적용하였다. 본 에이전트를 적용한 결과 모든 구매자가 만족할 수 있는 내쉬균형을 보이고, 구매자와 판매자의 조합이 파레토 최적임을 보여주고 있다. 특히 본 에이전트 협상을 적용할 수 있는 새로운 비즈니스 모델을 수립하고, 에이전트 협상 진행 시 필요한 도메인과 프로세스를 온톨로지로 구현하였다.

• 지능정보연구
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• 제16권2호
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• pp.73-94
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• 2010

개방병원에 환자의 입원을 의뢰한 담당 의사들은 환자들의 상태와 제대로 된 간호서비스를 받고 있는지에 대한 정보를 간호기록을 열람함으로써 확인할 수 있다. 하지만 간호기록은 병원의 내부자료로써 외부기관에 쉽게 공개할 수 없는 자료이고 표준화가 확립되어 있지 않아 병원별로 다르게 작성되고 있어 필요한 정보를 공유하는데 많은 어려움이 따른다. 따라서 본 연구에서는 개방병원 간호기록의 작성과 공유를 지원하기 위한 시스템을 개발하고자 하였다. 본 시스템은 우선 간호기록을 실제로 작성하는 간호사의 편의성을 고려하여 간호기록항목사전을 설정하게 하고 간호사와 의사간의 지능형 에이전트를 이용한 협상으로 작성과 공개의 항목을 확정하도록 하였다. 이 모든 과정은 의료기관간의 네트워킹을 지원할 수 있도록 웹기반시스템으로 설계되었고 실제 구현을 통하여 실현가능성을 확인하였다.

• Asia pacific journal of information systems
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• 제14권3호
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• pp.121-144
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• 2004

Developing a personalized system on a user's behalf which is working around the Internet-based marketplace is one of the challenging issues in intelligent e-business, especially mobile commenrce. It has been highly recommended that such a mobile personalized system has to perceive the user's needs a priori by tracking user's current context such as location with activity and then to identify the current needs dynamically and proactively. Automatically and unobtrusively getting user's context is an inevitable feature for the development of autonomous mobile commenrce. However, personalization methodologies and their feasible architectures for context-aware mobile commerce have been so far very rare. Hence, this paper aims to propose a context-aware mobile commerce development methodology by applying agent and semantic web technologies for personalized reminder system, which is one of the mobile commerce support system. We revisited associationism to understand a buyer's need identification process and adopt the process as 'purchase based on association' to implement a personalized reminder system. Based on this approach, we have showed how the agent-based semantic web service system can be used to realize need-aware reminder system. NAMA(Need-Aware Multi-Agent), a prototype system, has been implemented to show the feasibility of the methodology and framework under mobile setting proposed in this paper. NAMA embeds bluetooth-based location tracking module and identify what a user is currently looking at through her/his mobile device such as PDA. Based on these capabilities, NAMA considers the context, user profile with preferences, and information about currently available services, to aware user's current needs and then link her/him to a set of services, which are implemented as web services.

• 지능정보연구
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• 제13권3호
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• pp.119-140
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• 2007

추천 시스템은 정보의 홍수 속에서 사용자로 하여금 자신에게 더욱 가치 있고 흥미로운 정보를 선별할 수 있도록 돕는 자동화된 정보 여과 시스템이다. 최근 분산 컴퓨팅 환경에 대한 연구가 활발히 진행되면서, 지금까지의 중앙 서버에서 모든 정보를 관리하는 중앙 집중 방식의 추천 시스템에서 P2P 환경의 접근 방식으로 선회하고 있다. 협력적 여과는 상업적인 추천 시스템에서 가장 많이 사용하는 정보 여과 기법이지만, 그 성공에도 불구하고 확장성(scalability)과 데이터의 희박성(sparsity), 악의적인 사용자의 공격(shilling attack)에 대한 방어 등에 관련된 여러 제약을 갖는다. 중앙 집중 방식에서 분산된 방식으로의 변화는 추천의 신뢰성과 개인 정보의 남용 가능성에 관련한 문제점을 일부 해결할 수 있으나, 조작된 사용자 프로파일을 사용하여 추천을 조작하려는 의도를 갖는 악의적인 사용자의 공격에는 중앙 집중 방식과 마찬가지로 취약할 수 있다. 본 논문에서는 개인 정보의 오남용과 악의적인 사용자의 공격에 관련된 문제점을 해결하고, 분산된 환경에서 효과적인 협력적 여과를 수행하여 추천의 성능과 정확성을 높이기 위한 멀티 에이전트 기반의 추천 프레임워크를 제안한다. 추천의 신뢰성을 높이기 위해 사용자간의 신뢰 정보를 사용하며, 각 사용자의 개인 에이전트와 이동 에이전트간의 정보교환을 통해 효과적으로 신뢰 정보를 전파하고 분산된 유사도 계산의 효율성을 높였다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제3권2호
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• pp.133-137
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• 2003

Various bioinformatics tools for biological data processing have been developed and most of them are available in public. Most bioinformatics works are carried out by a composite application of those tools. Several integration approaches have been proposed for easy use of the tools. This paper proposes a new multi agent system to integrate bioinformatics tools in the perspective of workflow since the composite applications of tools can be regarded as workflows. For the easy integration, the proposed system employs wrapper agents for existing tools, uses XML-based messages in the inter-agent communication, and agents are supposed to extract necessary information from the received messages. This allows new tools to be easily added on the integration framework. The proposed method allows various control structures in workflow definition and provides the progress monitoring capability of the on-going workflows. In particular, agents in this system have the rule-based architecture which allows the defined rule set to be a special role agent. This feature provides fast and flexible agent development to aid in managing the complexity of bioinformatics application. This system has been partially implemented and has been proven to be a viable implementation for workflow-based bioinformatics tool integration.

• Journal of Information Technology Applications and Management
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• 제21권3호
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• pp.65-77
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• 2014

Ubiquitous learning has aroused great interest and is becoming a new way for foreign language education in today's society. However, how to increase the learners' initiative and their community cohesion is still an issue that deserves more profound research and studies. Emotional intelligence can help to detect the learner's emotional reactions online, and therefore stimulate his interest and the willingness to participate by adjusting teaching skills and creating fun experiences in learning. This is, actually the new concept of smart education. Based on the previous research, this paper concluded a neural mechanism model for analyzing the learners' emotional characteristics in ubiquitous environment, and discussed the intelligent monitoring and automatic recognition of emotions from the learners' speech signals as well as their behavior data by multi-agent system. Finally, a framework of emotional intelligence system was proposed concerning the smart foreign language education in ubiquitous learning.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.958-961
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• 2005

This paper introduces the development of an integrated design system using Service-Oriented Architecture. The system is proposed and being developed based on several advanced technologies, such as multi-agents, Internet/web Service, workflow, database and is aiming to provide the successful fulfill our target of integrating personnel, design activities and engineering resources along a predefined engineering design project (workflow) during product development process. By using SOA concept, the system tries to separates the engineering process into the engineering knowledge and the usage of engineering tool. Consequently, the computing resources in organization can be fully utilized and thus the cost can be reduced. The system is being designed and developed on the base of JADE (Java Agent DEvelopment Framework).

• 로봇학회논문지
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• 제17권4호
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• pp.407-416
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• 2022

Multiple AMRs have been proved to be effective in improving warehouse productivity by eliminating workers' wasteful walking time. Although Multi-agent Path Finding (MAPF)-based solution is an optimal approach for this task, its deployment in practice is challenging mainly due to its imperfect plan-execution capabilities and insufficient computing resources for high-density environments. In this paper, we present a MAPF-based fleet management system architecture that robustly manages multiple robots by re-computing their paths whenever it is necessary. To achieve this, we defined four events that trigger our MAPF solver framework to generate new paths. These paths are then delivered to each AMR through ROS2 message topic. We also optimized a graph structure that effectively captures spatial information of the warehouse. By using this graph structure we can reduce computational burden while keeping its rescheduling functionality. With proposed MAPF-based fleet management system, we can control AMRs without collision or deadlock. We applied our fleet management system to the real logistics warehouse with 10 AMRs and observed that it works without a problem. We also present the usage statistic of adopting AMRs with proposed fleet management system to the warehouse. We show that it is useful over 25% of daily working time.

• 로봇학회논문지
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• 제18권4호
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• pp.436-443
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• 2023

With the advancement of robot intelligence, the concept of man and unmanned teaming (MUM-T) has garnered considerable attention in military research. In this paper, we present a transformer-based architecture for predicting the health status of agents, with the help of multi-head attention mechanism to effectively capture the dynamic interaction between friendly and enemy forces. To this end, we first introduce a framework for generating a dataset of battlefield situations. These situations are simulated on a virtual simulator, allowing for a wide range of scenarios without any restrictions on the number of agents, their missions, or their actions. Then, we define the crucial elements for identifying the battlefield, with a specific emphasis on agents' status. The battlefield data is fed into the transformer architecture, with classification headers on top of the transformer encoding layers to categorize health status of agent. We conduct ablation tests to assess the significance of various factors in determining agents' health status in battlefield scenarios. We conduct 3-Fold corss validation and the experimental results demonstrate that our model achieves a prediction accuracy of over 98%. In addition, the performance of our model are compared with that of other models such as convolutional neural network (CNN) and multi layer perceptron (MLP), and the results establish the superiority of our model.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.259-260
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• 2008

전력계통에서 발생하는 고장의 70-95%는 1선지락 고장이고, 1선지락 고장의 70-90%는 아크고장이다. 아크고장이 발생하였을 경우, 아크고장과 같은 일시고장을 제거하고 투입하는 방법으로 자동재폐로가 사용되며 적절한 자동재폐로는 계통의 신뢰도 향상과 안정도 유지의 역할을 수행한다. 또한 송전용량 증대 및 무효전력 제어를 위한 FACTS(Flexible AC Transmission System, 유연송전시스템)기기의 사용이 증가함에 따라 FACTS가 적용된 계통에서 자동재폐로 영향을 분석해야 할 필요가 있다. 따라서 본 논문에서는 다양한 계통 상황을 보기 위해 기존의 멀티에이전트 기반의 자동재폐로가 적용된 계통에 FACTS을 적용하여 자동재폐로시의 영향을 분석하였다. EMTP와 JADE(Java Agent DEvelopment framework)를 이용하여 자동재폐로 계통 및 멀티에이전트 시스템을 모의하였으며, SVC(Static VAR Compensator)에 의한 영향을 분석하였다.