• 전기의세계
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• 제26권3호
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• pp.84-91
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• 1977

A modified version of algorithm and computer program is proposed to improve the currently available contingency analysis methode for the security control of power system. The underlying principle is based upon the reasonable modification of the current methods suggested by Stagg, Tinny, Alsac, and Stott in consideration of speed, aceuracy, reliability and convergency characteristics. The algorithm and program are desirgned especially for On-Line operation, although Off-Line applications are readily available. Several case studies on the Koren Power Company's 48-bus, 91-line system have shown that the method proposed is efficiently powerful in a sense of practical applicability.

• 한국도서관정보학회지
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• 제15권
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• pp.113-151
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• 1988

The enumerative classification schemes do not represent the tiny mass of knowledge embodied in a article in a periodical or in a chapter or a paragraph of a book. But today's information centers regard a tiny spot of knowledge embodied in a article as a class. we call this micro-thought. But the enumerative classification are manual systems, it cannot be a n.0, pplied to the automation of classification. The purpose of this study is to build a general principle for the automatic book-classification which can be put to use in library operation, and to present a methodology of the automatic classification for the library. The methodology used is essentially theoretical, Published works by and about Ranganathan, especially 6th edition of the CC were studied, analyzed. The principle of automatic book classification derived from the analysis of colon classification and facet combinations. The results of this study can be summarized as follows ; (1) This study confined the fields of library science and agriculture. (2) This study represent a general principles for the automatic book classification of library science and agriculture. (3) Program flowcharts are designed as a basis of system analysis and program procedure in library science and agriculture. (4) The principles of the automatic classification in library, science is different from that of agriculture. (5) Automatic book classification can be performed by the principle of faceted classification, by inputting the title and subject code into a computer. In addition, the expected value from the automatic book-classification is as follows (1) The prompt and accurate of classification is possible. (2) Though a book is classified in any library, it can have same classification number. (3) The user can retrieve the classification code of a book for which he or she wants to search through dialogue with the computer. (4) Since the concept coordination method is employed, a tiny mass of knowledge embodied in a article in a periodical or in a chapter or a paragraph of a book can be represented as a class. (5) By performing automatic book-classification, the automation of library operation can be completed.

• 한국실천공학교육학회논문지
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• 제2권2호
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• pp.30-35
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• 2010

본 논문에서는 학생들이 프로그래밍언어를 더 잘 이해하고, 프로그래밍 능력을 향상시킬 수 있는 몇 가지 방법을 제안한다. 현재 컴퓨터공학부뿐만 아니라, 전자공학, 메카트로닉스공학 등에서도 프로그래밍교육이 이루어지고 있으며, 특히 컴퓨터공학의 경우 프로그래밍 교과목은 가장 기본적인 교과목이라고 할 수 있다. 하지만, 컴퓨터 프로그래밍 언어를 이해하고, 주어진 프로그래밍 문제를 해석하여 프로그래밍언어로 구현하는 것에 많은 학생들이 어려움을 겪고, 프로그래밍언어를 가르치는 교수자들도 효과적인 프로그래밍 언어 교육에 관심이 많다. 학생들이 좀 더 잘 프로그래밍언어를 이해하고, 프로그래밍 기술을 향상시킬 수 있는 교육방법을 몇 가지 제안하면 다음과 같다. 첫째 학생들이 프로그래밍언어를 잘 이해하기 위해서는 먼저 컴퓨터 프로그램의 기본적인 동작원리 또는 컴퓨터구조에 대한 사전지식이 필요하다. 둘째 문법위주의 주입식 이론교육보다는 다양한 프로그래밍 예제실행 위주의 프로그래밍언어 교육이 더 효과적이다. 셋째 프로그램의 실행과정과 메모리 할당/해제 흐름에 대한 메모리상태 가시화교육이 필요하다. 넷째 효과적인 실습과 과제 프로그래밍문제들을 통한 프로그래밍 응용능력을 배양하도록 하자. 다섯째 본인 스스로 프로그래밍할 수 있도록 유도하고, 프로그래밍의 자유도를 충분히 부여하자. 마지막으로 텀프로젝트를 통한 개개인의 프로그래밍 능력을 극대화하는 것이 필요하다.

• 한국도서관정보학회지
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• 제18권
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• pp.139-192
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• 1991

Though the computer has become deeply entrenched as the major tool in information processing(library works), it may be obvious that automatic book classification techniques ate still under experimentation, and the techniques have not yet been tested against the criterion of usefulness. The purpose of this study is to design of knowledge base for automatic book classification which can be put to use in library operation, and to present a methodology of application of the automatic classification into the library. Since the enumerative classification schemes which are existing are manual systems, it cannot be applied to the automatic classification, the principle of faceted classification based on concept analysis is brought in and studied. The result of this study are summarized as follows : 1. The design of knowledge base confined the field of agriculture and medicine. 2. If title is entered by the computer keyboard it will be searched in knowledge base, and then be classified by the principle of automatic classification. 3. Program flowcharts are designed as a bases of classification procedures for automatic subject recognition and classification. 4. 283 books in agriculture, 196 books in medicine were drawn at random from Taegu University Library and Young-Nal Medical Center Library respectively. 5. The experiment of automatic classification is performed 143 books in agriculture 166 books in medicine except for other subject books. 6. It was proved that automatic book classification is possible by design of knowledge base. In addition the expected values from design of knowledge base for automatic book classification are as follows : 1. The prompt and accurate process of classification is possible. 2. Though some title is classified in any library, it can be classified the some classification number by a program. 3. The user can retrieve the classification codes of books for which he or she wants to search through the computer. 4. Since the concept coordination method is employed the representing of a multisubject concept is make simple. 5. By performing automatic book classification the automation of total system can be achieved. 6. The efficient international information transfer will be advanced since all the institution maintain unified classification number.

• 한국지능시스템학회논문지
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• 제11권6호
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• pp.558-562
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• 2001

In this paper, a fuzzy hyperresolution principle called CFHR. Compensatory Fuzzy Hyperresolution, with positive compensation facility is proposed. Usually hyperresolution has several terms of conditon parts. Theser terms have to be connected by the an connective. If the main/max operator to be used the and operation, there is some dependency problem of the min/max operator. So , we propose a compensatory operator EGM and applied it to the CFHR, We show the CFHR does more meaningful reasoning than existing method. We also prove the completeness of CFHR.

• 중소기업융합학회논문지
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• 제3권1호
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• pp.43-48
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• 2013

컴퓨터 기술이 발전함에 따라 시스템 공격 기술이 점점 더 진화하고 다양화 되고 있다. 컴퓨터의 하드웨어와 소프트웨어는 점점 진화하고 성능이 향상되고 있지만 기본 동작 원리는 거의 변화하지 않고 있어 문제 대두되고 있다. 일반적으로 응용프로그램들이 실행상태에 놓이면 프로그램의 데이터들이 메모리에 놓이게 된다. 이러한 데이터들은 운영체제 동작의 효율성 때문에 메모리에 남아있게 되어 메모리 해킹이나 메모리 분석을 통하여 데이터들에 접근할 수 있게 된다. 그로 인하여 사용자의 개인정보, 암호화된 키, 인증서 등이 유출되어 큰 피해가 발생하기 때문에 대응 방안이 마련 되어야 한다. 본 논문으로 메모리 해킹에 대한 문제점과 그에 대한 대응책을 제안한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.2290-2295
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• 2005

In this paper, it is developed simulator system of 3 D.O.F parallel robot for educate of expertness. This simulator system is composed of three parts ? 3 D.O.F parallel robot, controller (hardware) and software. First, basic structure of the robot is 3 active rotary actuator that small geared step motor with fixed base. An input-link is connected to this actuator, and this input-link can connect two ball joints. Thus, two couplers can be connected to the input-link as a pair. An end-plate, which is jointed by a ball joint, can be connected to the opposite side of the coupler. A sub-link is produced and installed to the internal spring, and then this sub-link is connected to the upper and bottom side of the coupler in order to prevent a certain bending or deformation of the two couplers. The robot has the maximum diameter of 230 mm, 10 kg of weight (include the table), and maximum height of 300 mm. Hardware for control of the robot is composed of computer, micro controller, pulse generator, and motor driver. The PC used in the controller sends commands to the controller, and transform signals input by the user to the coordinate value of the robot by substituting it into equations of kinematics and inverse kinematics. A controller transfer the coordinate value calculated in the PC to a pulse generator by transforming it into signals. A pulse generator analyzes commands, which include the information received from the micro controller. A motor driver transfer the pulse received from the pulse generator to a step motor, and protects against the over-load of the motor Finally, software is a learning purposed control program, which presents the principle of a robot operation and actual implementation. The benefit of this program is that easy for a novice to use. Developed robot simulator system can be practically applied to understand the principle of parallel mechanism, motors, sensor, and various other parts.

• 한국정보전자통신기술학회논문지
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• 제11권1호
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• pp.26-33
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• 2018

A web application running on the Internet is causing many difficulties for a program developer, and it requires to process multiple sessions at the same time due to the occurrence of excessive traffic. Web applications should be able to process concurrent requests efficiently and in real time. Node.js is a single-threaded server-side JavaScript environment implemented in C and C ++ as one of the latest frameworks to implement event models across the entire stack. Nodes implement JavaScript quickly and robust to achieve the best performance using a JavaScript V8 engine developed by Google. In this paper, it will be explained the operation principle of Node.js, which is a lightweight real-time web server that can be implemented in JavaScript for real-time responsive web applications. In addition, this application was practically implemented through automatic alignment system for group scheduling to demonstrate event-based real-time response web processing.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제27권4호
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• pp.321-329
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• 2001

안면 비대칭이나 반안면 왜소증등과 같은 악변형증 환자의 진단 및 치료계획을 수립함에 있어서 종합적이고도 3차원적인 접근을 하는 것이 중요하다. 최근 3차원 CT가 개발되었으나 이 경우 계측점의 정확성이 아직 확립되어 있지 않다. 최근들어 두부 위치를 보정하여 다른 시기에 촬영된 방사선 사진을 3차원적으로 비교할수 있도록 하는 방법이 소개되었다. 이러한 방법을 이용하여 얻어진 3차원 좌표값 자동적으로 계산한 후 3차원적 구조 분석 및 계측을 할 수 있는 컴퓨터 프로그램을 개발하였다. 이 프로그램은 정중면을 설정하는 개념에 입각하여 안면구조물의 변형정도를 다양한 방법으로 나타낼수 있으며 이러한 기능은 특히 안면 비대칭의 분석과 술전, 후 비대칭의 정도를 파악하는데 유용한 것으로 보인다.