• 한국CDE학회지
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• 제8권1호
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• pp.58-65
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• 2002

Collaborative product commerce(CPC) involves many people working together with heterogeneous and distributed software applications. For such an environment, Workflow Management System(WFMS) can be useful for coordination of people, software agents and processes. It provides diverse services including automatic work muting, project management continuous process improvement and application integration. However, there are some limitations to apply WFMS to CPC environment due to inflexibility and lack of design support facilities. This paper identifies the problems and addresses possible approaches to overcome the difficulties.

• 기본간호학회지
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• 제9권3호
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• pp.370-378
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• 2002

Purpose: The purpose of this descriptive study was to investigate the administration patterns of sedatives and paralytic agents for mechanically ventilated patients. Method: The participants were 18 adult patients who received mechanical ventilation therapy for more than 1 day in the MICU. Collected data were type of injected medications, administration interval, injected amount, administration purpose and patient assessment by nurses. Result: Mean age of the patients was 61 years old. Seventy-two percent were male. Only 2 drugs (midazolam and norcuron) were administered to most of subjects. The type of medication administered was less heterogeneous than in previous studies. Most of the patients received sedatives and paralytics intermittently. Six different methods were used by nurses to administer sedatives and paralytics. The mean injection frequency was 9.3 times/day for sedatives and 10.8 times/day for paralytic agents. The most common purpose for administration of the drugs was full sedation of the patient (57%). Conclusion: Since a few patients received sedatives and paralytic agents higher than usual dose and a few Patients received those drugs lower than usual dose, nurses need to use proper protocols and guidelines for sedation to avoid oversedation and undersedation.

• 한국전자거래학회지
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• 제10권4호
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• pp.19-33
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• 2005

본 연구에서는 시맨틱 웹을 구성할 수 있도록 하는 지식표현, 온톨로지, 에이전트를 통해 급변하는 전자거래 환경을 극복하고 이질적이고 분산되어 있는 정보들을 통합할 수 있도록 하기 위한 방법론을 제시하고자 한다. 이를 위해 모델링의 기반이 되는 구문론적/의미론적 통합 및 에이전트의 운용방법론에 대해 논하며, 메타 모델링에 바탕을 두는 온톨로지의 구축에 중점을 두고 설명한다. IRDS (Information Resource Dictionary Standard) 프레임워크에 기반한 구조에 따라 OWL(Web Ontology Language)을 사용하여 온톨로지를 구체화하며, 프로세스 표현을 위해 PSL(Process Specification Language)-ontology의 용어들을 중간 계층으로 구성하여 차용한 예를 제시한다. 제시한 프레임워크를 통해 정보 자원들과 비즈니스 프로세스를 정의하고 공유하며 관리함으로써 중복성과 불일치성을 제거할 수 있을 것이다.

• 정보처리학회논문지C
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• 제10C권5호
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• pp.565-574
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• 2003

본 논문에서는 한국정보보호진흥원에서 계층적 침입시도 탐지 및 대응을 위해 개발하였던 SDMS-RTIR(Scan Detection Management System with Real Time Incidence Response)을 지원하는 침입탐지 메시지 교환 프로토콜 라이브러리 IDMEPL을 구현하였다. IDMEPL은 IDWG의 IDMEF와 IAP를 기반으로 이기종의 침입(시도)탐지 시스템과 SDMS-RTIR의 실시간 상호연동을 제공하며 TLS 프로토콜을 통해 보안위협에 안전한 메시지 교환을 지원한다. 특히, IDMEPL은 유연성 있는 침입탐지 메지시 교환 프로토콜 선택 과정과 패스워드 기반의 암호화 프로토콜을 제공함으로써 각 침입(시도)탐지 시스템들로 하여금 자신의 네트워크 환경에 적절한 메시지 교환 프로토콜과 암호화 통신 방법을 선택할 수 있게 하였다. 이처럼 IDMEPL이 탑재된 SDMS-RTIR은 대규모의 네트워크 환경에서 이기종의 다양한 침입(시도)탐지 시스템들로부터 침입탐지 메시지를 실시간으로 접수하고 분석할 수 있다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.410-415
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• 2004

Employing knowledge of adaptive possibilities of agents in multi-agents system, we have explored new aspects of distributed modular systems for building ubiquitous heterogeneous robotic systems using intelligent building blocks (I-BLOCKS) [1] as reconfigurable modules. This paper describes early technological approaches related to technical design, experimental developments and evaluation of adaptive processing and information interaction among I-BLOCKS allowing users to easily develop modular robotic systems. The processing technology presented in this paper is embedded inside each $DUPLO^1$ brick by microprocessor as well as selected sensors and actuators in addition. Behaviors of an I-BLOCKS modular structure are defined by the internal processing functionality of each I-Block in such structure and communication capacities between I-BLOCKS. Users of the I-BLOCKS system can easily do 'programming by building' and thereby create specific functionalities of a modular robotic structure of intelligent artefacts without the need to learn and use traditional programming language. From investigating different effects of modern artificial intelligence, I-BLOCKS we have developed might possibly contain potential possibilities for developing modular robotic system with different types of morphology, functionality and behavior. To assess these potential I-BLOCKS possibilities, the paper presents a limited range of different experimental scenarios in which I-BLOCKS have been used to set-up reconfigurable modular robots. The paper also reports briefly about earlier experiments of I-BLOCKS created on users' natural inspiration by a just defined concept of modular artefacts.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2003년도 Proceeding
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• pp.35-41
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• 2003

A multi-agent technology has emerged as a new paradigm that can flexibly and promptly cope with various environmental changes and complex problems. Accordingly, many researches are being made to establish multi-agent systems in an effort to solve dynamic problems in many fields. However, most previous researches on the multi-agent frameworks aimed at, on behalf of a user, exchanging and sharing information between agents, reusing agents, and suggesting job cooperation in order to integrate and assimilate heterogeneous agents. That is to say, their frameworks mainly focused on the basic functions of general multi-agent. Therefore, they are not suitable to the development of the proper system for a specific field such ,.s a negotiation. In an effort to solve this problem, this research has tried to design a multi-agent framework-base negotiation system, so that for the sake of a user it can evaluate the negotiation messages, manage the negotiation messages, and quickly and exactly exchange messages between negotiation agents. First of all, we have made research on the basic functions hat are necessary in the development of a negotiation system, and then have analyzed the limitations of existing multi-agent frameworks when trying to apply them to a negotiation system. After these efforts, this study suggests a design of multi-agent framework to develop a negotiation system.

• 한국전자거래학회지
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• 제6권3호
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• pp.63-80
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• 2001

The construction of the students knowledge in e-Learning systems, namely the student modeling, is a core component used to develop e-Learning systems. However, existing e-Learning systems have many problems to share the knowledge in a heterogeneous student model and a distributed knowledge base. Because the methods of the knowledge representation are different in each e-Learning systems, the accumulated knowledge cannot be used or shared without a great deal of difficulty. In order to share this knowledge, existing systems must reconstruct the knowledge bases. Consequently, we propose a new a Case Markup Language based on XML in order to overcome these problems. A distributed e-Learning systems fan have the advantage of easily sharing and managing the heterogeneous knowledge base proposed by CaseML. Moreover students can generate and share a case knowledge to use the communication protocol of agents. In this paper, we have designed and developed a CaseML by using a knowledge markup language. Furthermore, in order to construct an intelligent e-Learning systems, we have done our research based on the design and development of the intelligent agent system by using CaseML.

• 대한핵의학회지
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• 제26권1호
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• pp.8-13
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• 1992

Low doses of ionizing radiation from external or internal sources cause heterogeneous distribution of energy deposition events in the exposed biological system. With the cell being the individual element of the tissue system, the fraction of cells hit, the dose received by the hit, and the biological response of the cell to the dose received eventually determine the effect in tissue. The hit cell may experience detriment, such as change in its DNA leading to a malignant transformation, or it may derive benefit in terms of an adaptive response such as a temporary improvement of DNA repair or temporary prevention of effects from intracellular radicals through enhanced radical detoxification. These responses are protective also to toxic substances that are generated during normal metabolism. Within a multicellular system, the probability of detriment must be weighed against the probability of benefit through adaptive responses with protection against various toxic agents including those produced by normal metabolism. Because irradiation can principally induce both, detriment and adaptive responses, one type of affected cells may not be simply summed up at the expense of cells with other types of effects, in assessing risk to tissue. An inventory of various types of effects in the blood forming system of mammals, even with large ranges of uncertainty, uncovers the possibility of benefit to the system from exposure to low doses of low LET radiation. This experimental approach may complement epidemiological data on individuals exposed to low doses of ionizing radiation and may lead to a more rational appraisal of risk.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2000년도 추계종합학술대회
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• pp.368-371
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• 2000

분산 컴퓨팅 기술과 객체지향 기술의 발전은 인터넷상의 동일 기종간의 분산처리뿐만 아니라, 이 기종간에도 분산 컴퓨팅이 가능한 분산 객체 컴퓨팅으로 발전되었다. 이를 대표하는 CORBA(Comm on Object Request Broker Architecture)도 단지 네트워크를 통한 이기종간의 상호 운용성만을 해결한 상태이며, 대부분 서버 객체의 존재 및 정상적인 활동이 보장되지만 네트워크 오버헤드가 발생하는 경우에는 클라이언트의 서비스 요구에 응할 수 없는 문제점을 가지고 있다. 이러한 문제를 해결하는 방안 중 하나로, 데이터와 코드를 결합한 객체를 직접 이동하는 이동에이전트(Mobile Agent)를 분산 컴퓨팅 기술과 결합하는 방법이 대두되고 있다.

• 한국컴퓨터산업학회논문지
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• 제5권2호
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• pp.251-260
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• 2004

네트워크 보안의 중요성과 필요성이 증대됨에 따라 많은 조직들이 다양한 보안 시스템을 네트워크에 적용하고 있다. 침입 차단 시스템, 침입 탐지 시스템, 취약점 스캐너와 같은 보안 시스템들이 취약성 정보를 공유하게 되면 일관된 통합 보안 환경을 구축할 수 있다. 본 논문에서는 침입탐지 에이전트와 방화벽 에이전트가 계약망 프로토콜(Contract Net Protocol)에 의해서 서로 연동할 수 있는 구조를 디자인하고 구축하려다 계약망 프로토콜은 분산 시스템과 같은 이 기종의 컴퓨터 시스템의 효과적인 연통을 위한 방법으로서 여러 에이전트들이 모여 서로 협력하며 하나의 문제를 해결하게 된다 계약망 프로토콜의 선택 알고리즘과 퍼지 제어기를 사용하였을 경우 성능을 비교함으로써 에이전트 선택에 있어서 보다 효과적인 방법을 제시할 것이다.