• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2258-2263
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• 2003

This paper presents the design and development of an optimal fuzzy logic controller (FLC) for a laser tracking system. An optimal intelligent fuzzy logic controller was founded on integral criterion of the fuzzy models and three-dimensional fuzzy control. Research had been also concentrated on the methods for multivariable fuzzy models for the purposes of real-time process. Simulation results have shown remarkable tracking performance of this fuzzy PID controller.

• Bulletin of the Korean Chemical Society
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• 제26권2호
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• pp.334-336
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• 2005

• 한국정보통신학회논문지
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• 제26권4호
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• pp.598-604
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• 2022

대학의 학사정보시스템은 대학의 핵심이 되는 시스템으로 학생의 학적 등 다양한 대학내 모든 활동을 관리해야 하므로 해마다 복잡해지고 데이터가 무분별하게 많아진다. 이에 따라 학사정보시스템의 데이터는 신뢰성이 저하되어 사용자와의 의사소통 문제가 발생하게 되고 시스템 내부에 큰 장애를 불러올 수 있기에 학사정보시스템의 데이터 검증 연구가 필요하다. 이에 본 논문에서는 학사정보시스템에 대해 데이터 품질관리의 데이터 프로파일링 기법을 이용하여 컬럼 속성 분석, 허용 값 목록 분석, 문자열 패턴 분석, 날짜 유형 분석, 유일 값 분석 방법으로 설계하였다. 구현 단계에서는 위의 5가지 분석 방법을 이용하여 스크립트를 구현하였고, 스크립트를 실행하여 학사정보시스템의 유형별 오류를 발견하여 오류의 원인을 시스템 내부에서 찾아 수정하였으며 내부시스템 장애 확률을 낮출 수 있었다.

• Journal of information and communication convergence engineering
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• 제18권1호
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• pp.16-21
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• 2020

Owing to the convergence of the communication network with the control system and public network, security threats, such as information leakage and falsification, have become possible through various routes. If we examine closely at the security type of the current control system, the operation of the security system focuses on the threats made from outside to inside, so the study on the detection system of the security threats conducted by insiders is inadequate. Thus, this study, based on "Spotting the Adversary with Windows Event Log Monitoring," published by the National Security Agency, found that event logs can be utilized for the detection and maneuver of threats conducted by insiders, by analyzing the validity of detecting insider threats to the control system with the list of important event logs.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.298-309
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• 2001

This research aims to unravel the significant features of the human immune system, which would be successfully employed for a novel network intrusion detection model. Several salient features of the human immune system, which detects intruding pathogens, are carefully studied and the possibility and the advantages of adopting these features for network intrusion detection are reviewed and assessed.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.149-151
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• 2002

We had been developing the variety of parallel processing systems in order to improve the processing speed of visual media applications. These systems were using multi-access memory system(MAMS) as a parallel memory system, which provides the capability of the simultaneous accesses of image points in a line-segment with an arbitrary degree, which is required in many low-level image processing operations such as edge or line detection in a particular direction, and so on. But, the performance of these systems did not give a faithful speed because of asynchronous feature between MAMS and processing elements. To improve the processing speed of these systems, we have been investigated a pipelined parallel processing system using MAMS. Although the system is considered as being the single instruction multiple data(SIMD) type like the early developed systems, the performance of the system yielded about 2.5 times faster speed.

• 대한의용생체공학회:의공학회지
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• 제26권2호
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• pp.65-71
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• 2005

The main obstacles for adopting a mobile health information system to existing hospital information system are the redundancy of clinical data and the additional workload for implementing the new system. To obtain a seamless communication and to reduce the workload of implementation, an easy and simple implementation strategy is required. We propose a mobile clinical information system (MobileMed) which is specially designed for the easy implementation. The key elements of MobileMed are a smart interface, an HL7 message server, a central clinical database (CCDB), and a web server. The smart interface module transfers the key information to the HL7 message server as new clinical tests data is recorded in the existing laboratory information system. The HL7 message server generates the HL7 messages and sends them to the CCDS. As a central database the CCDS collects the HL7 messages and presents them to the various mobile devices such as PDA. Through this study we might conclude that the architecture for the mobile system will be efficient for real-time data communication, and the specially designed interface will be an easy tool for implementing the mobile clinical information system.

• 간호행정학회지
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• 제7권1호
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• pp.111-126
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• 2001

The purpose of this study is to provide a basic data by evaluation the problems about nursing information system and identifying the need of improvement of it. Data were collected from April 6 to 15, 2000 through questionnaires taken by 218 nurses working in a general hospital using nursing information systems. The two structured questionnaires were used for the collecting the data. The data obtained were analyzed by using frequency, percentage, mean, standard deviation, t-test, one-way ANOVA, Pearson's correlation coefficients, and Cronbach's alpha coeffcients. The results are as follows: 1. In the problem of nursing information system, ${\lceil}$There are no appropriate programs for independent nursing information systems because there are no nurse informatists in the information department${\rfloor}$ scored highest. Also, ${\lceil}$There is a lack of manual for operation of the nursing information system${\rfloor}$, ${\lceil}$There is difficulty getting help when the system is in trouble${\rfloor}$, ${\lceil}$General information about using computers and managing problems are lacking${\rfloor}$, ${\lceil}$Unsatisfactory matters about the nursing information systems are not improved quickly.${\rfloor}$ received high scores. 2. In the need for improvement of the nursing information system, ${\lceil}$Nursing education and research${\rfloor}$ was the highest area of the system. 3. The problems of the nursing information system showed high positive correlation with the need for improvement of the system(p=.00).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.555-556
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• 2006

태양전지는 일사량에 따라 그 출력특성이 변화하기 때문에 태양전지로부터 최대출력을 얻기 위해서는 컨버터에 의한 최대 전력점 추종 제어가 필요하다. 본 연구에서는 태양광 발전시스템의 최대전력추종을 위해 퍼지 이론을 도입한 퍼지제어기를 설계하였다. 그리고 퍼지제어기의 디지털 설계를 위해 태양광 발전시스템의 각 부분을 구성하고, 마이크로프로세서와 FPGA의 두 가지 방식으로 제어기를 구현하였다. 또한 구현된 두 가지 방식의 퍼지제어기에 대해 실험을 통하여 비교 분석하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.1221-1222
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• 2006

태양전지는 일사량에 따라 그 출력특성이 변화하기 때문에 태양전지로 부터 최대출력을 얻기 위해서는 컨버터에 의한 최대 전력점 추종제어가 필요하다. 본 연구에서는 태양광 발전시스템의 최대전력추종을 위해 퍼지 이론을 도입한 퍼지제어기를 설계하였다. 그리고 퍼지제어기의 디지털 설계를 위해 태양광 발전시스템의 각 부분을 구성하고, 마이크로프로세서와 FPGA의 두가지 방식으로 제어기를 구현하였다. 또한 구현된 두 가지 방식의 퍼지제어기에 대해 실험을 통하여 비교분석 하였다.