• 석유와에너지
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• 5호통권99호
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• pp.120-137
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• 1989

이 자료는 최근 OPEC사무국이 발표한 "FACTS & FIGURES. A GRAPHICAL ANALYSIS OF WORLD ENERGY UP TO 1987"을 옮긴 것이다. <편집자주>

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.573-578
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• 1991

A stability analysis technique has been proposed for linear SISO system associated with fuzzy logic controller. An analysis technique using the concept of well-known sector bound nonlinearity and its graphical interpretation, i.e., the circle criterion, is presented. Thus the use of classical Nyquist locus and the BODE diagram is brought into the picture. The aim of this present note is to represent a graphical approach based on sector bound nonlinearity and circle criterion for assessing the performance(degree of stability) of the linear SISO system associated with fuzzy logic controller. The degree of stability of the system is defined in terms of its gain and phase margins as defined in Section 3.

• 한국전자파학회논문지
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• 제8권2호
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• pp.207-213
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• 1997

주파수 30 MHz-18 GHz에서의 무선 주파수 도시잡음 측정이 1994년과 1995년에 걸쳐, 전국 21개 도시에서 실시되었다. 각각의 지역에 대해 계절별, 또한 주.야로 실시된 측정 데이터를 분석하였으며, 그 분석 방법으로 APD,NAD, ACR 둥과 같은 통계적 분석 방법을 선택하였다. GUI (Graphical User Interface) 프로그램을 이용한 컴퓨터 분석 결과, 봄, 여름, 겨울의 도시 잡음은 약간의 차이를 보이는 반면, 가을에는 다른 계절에 비해 다소 높게 나타났으며, 또한 야간의 잡음레벨이 주간보다 높게 나타나는 것을 확인할 수 있었다.

• Genomics & Informatics
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• 제20권3호
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• pp.36.1-36.6
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• 2022

BLAST, a basic bioinformatics tool for searching local sequence similarity, has been one of the most widely used bioinformatics programs since its introduction in 1990. Users generally use the web-based NCBI-BLAST program for BLAST analysis. However, users with large sequence data are often faced with a problem of upload size limitation while using the web-based BLAST program. This proves inconvenient as scientists often want to run BLAST on their own data, such as transcriptome or whole genome sequences. To overcome this issue, we developed NBLAST, a graphical user interface-based BLAST program that employs a two-way system, allowing the use of input sequences either as "query" or "target" in the BLAST analysis. NBLAST is also equipped with a dot plot viewer, thus allowing researchers to create custom database for BLAST and run a dot plot similarity analysis within a single program. It is available to access to the NBLAST with http://nbitglobal.com/nblast.

• 한국정보통신학회논문지
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• 제19권1호
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• pp.221-229
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• 2015

시스템 분석가 또는 정보시스템 설계자들의 역할은 경영자와 정보기술자 간의 간극을 메우는 것이다. 이들은 사물을 인식하여 개념화하고 추상화하여 정신모델을 형성한 다음, 다양한 그래픽 모델링 도구를 이용하여 표현함으로써 데이터모델이나 프로세스 모델과 같은 현행 모델(ASIS model)을 구축한다. 이들은 자신의 경험과 지식을 바탕으로 현행모델에서 문제점을 발견하고 개선안을 구상하여, 다시 그래픽 도구를 이용하여 미래모델(TOBE model)을 설계한다. 이와 같이 시스템분석 및 설계 전공자들에게 그래픽 모델링 능력은 매우 중요함에도 불구하고, 그래픽모델링 능력을 측정하기 위한 연구는 매우 미흡한 실정이다. 본 연구에서는 시스템분석가와 정보시스템 설계자들에게 가장 핵심적인 능력이라고 할 수 있는 그래픽모델링능력을 측정하기 위한 도구를 개발하였다. 언어학, 수학, 경영과학, 통계학 등 다양한 학문 분야에서 모델링 능력을 측정하기 위한 연구들을 참고하여 그래픽 모델링 능력 설문 문항을 개발하고, 이를 92명의 필리핀과 한국의 정보시스템 관련 전공 학생들에게 시험을 보게 하여 그 결과를 바탕으로 측정도구의 신뢰성과 타당성을 검증하였다. 학계에서는 학생들의 모델링 학습효과를 측정하는 도구로 활용할 수 있고, 기업에서는 시스템분석가와 정보시스템 개발자를 채용할 때 적성검사 도구로 이용할 수 있을 것으로 기대된다.

• 한국경영과학회지
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• 제4권2호
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• pp.45-50
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• 1979

This paper tries to show that LOB, a graphic device, can be equipped with the vector concept. The notations, calculations, and relationships of useful vectors are introduced and the general procedure for Vector Analysis of LOB is applied in this paper. Comparing vector analysis with graphical method, the author concludes that the former is more powerful than the latter in production control.

• 전기의세계
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• 제17권2호
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• pp.11-15
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• 1968

One of the most important methods used in the modern analysis of linear networks and systems is the signal flow graph technique, first introduced by S.J. Mason in 1953. In essence, the signal-flow graph technique is a graphical method of solving a set of simultaneous. It can, therefore, be regarded as an alternative to the substitution method or the conventional matrix method. Since a flow-graph is the pictorial representation of a set of equations, it has an obvious advantage, i.e., it describes the flow of signals from one point of a system to another. Thus it provides cause-and-effect relationship between signals. And it often significantly reduces the work involved, and also yields an easy, systematic manipulation of variables of interest. Mason's formula is very powerful, but it is applicable only when the desired quantity is the transmission gain between the source node and sink node. In this paper, author summarizes the signal-flow graph technique, and stipulates three rules for conversion of an arbitrary nonsource node into a source node. Then heuses the conversion rules to obtain various quantities, i.e., networks gains, functions and parameters, through simple graphical manipulations.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.692-696
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• 2001

Thermo-mechanical behavior and mechanical properties of intelligent polymer matrix composite with SMA fiber are experimentally studied. It is found that increments of compressive thermal strain is observed as the pre-strain and TiNi volume fraction increase. The smartness of the SMA is given due to the shape memory effect of the TiNi fiber which generates compressive residual stress in the matrix material when heated after being prestrained. In the paper, alloy is based on the general purpose commercial code ANSYS. And for the purpose of easy and fast user's analysis, it is developed the Graphical User Interface by using Tcl/Tk language.

• KEPCO Journal on Electric Power and Energy
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• 제2권2호
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• pp.223-225
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• 2016

The newly proposed analysis method using a direct-current current-voltage (DCIV) simulation is introduced for investigating leakage current composing MOS transistor. From comparing the density and location of traps using DCIV method and investigating the leakage current of gate channel transistor, we proposed the graphical analysis method to correlate the DCIV current and leakage mechanism by the traps. And, our graphical method intuitively explains that leakage current in MOS transistor is well correlated with the DCIV current of the MOS transistor arrays due to two kinds of traps created by Fowler-Nordheim (F-N) stress and Hot carrier stress, respectively.

• 전기학회논문지
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• 제58권10호
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• pp.1902-1910
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• 2009

This paper presents a graphical windows-based program for the education and training for novel network reduction. The object of developed simulator is to provide users with a simple and useable tool for gaining an intuitive feel for power system analysis. The developed simulator consists of the main module (MMI,GUI), the location marginal price module (LMP), the clustering module and network reduction module. Each module has a separate graphical and interactive interfacing window. The developed simulator needs with the PSS/E input data format, generator cost function, location information. Line admittances of reduced network was determined by using the power flow method(Newton-Raphson). So line flow of reduced network is almost same to original power system. Results of reduced network are compared on the window in the tabular format. Therefore, the developed simulator can be utilized as a useful tool for effective education and training for power system analysis.