• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.1
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• pp.59-66
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• 1989

The purpose of this study is to develop a personal computer aided 3-D geometric modeller. To perform this study, we set up a cube, cylinder, and a prism as primitives in the first segment of this study. By modelling the 3-D object through their transformation, addition, and subtraction, we proved the validity of the developed algorithm and its computer program. Some examples show the results of applying the program to model a few simple shapes of the machine parts. These results met the first aim of this study.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.228-230
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• 2003

This paper presents a utility interactive photovoltaic generation system with the angle of inclination and direction. This paper summarizes the results of these efforts by offering a snapshot of the configuration of photovoltaic in residential applications. The status of photovoltaic system components and interconnection and safety equipment will be summarized. This system is able to variation the angle of inclination and direction. Hence this paper discuss only results that might be useful for generation power.

• Journal of Welding and Joining
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• v.20 no.5
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• pp.113-119
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• 2002

To prevent problems caused by welding deformation, preparation in the design stage is necessary. Countermeasures in the design stage is also the most cost-effective method. In this study, to give designers information on the welding deformation, a system to visualize the welding deformation is developed. The model to visualize the deformation is the stiffened plate common in steel structures. To increase computational efficiency, theoretical solutions to calculate the deformation of plate and stiffener are used instead of numerical analysis. Also, to secure accuracy, experiments to estimate bending moment causing welding deformations are performed. A computer program written with Visual C++ is developed for interactive data input, calculation of welding deformation and display of deformed shape. Designers can change the design in the early stage after checking the deformed shape by this system.

• Journal of the Korean Society of Systems Engineering
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• v.1 no.2
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• pp.34-42
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• 2005

Logistic Support Analysis(LSA) and Logistic Supportability Review must be carried out as soon as possible in development stage in order to minimize operation/maintenance cost that head the list of weapon cost and improve logistic supportability of the weapon system. And the result must be used for hardware designs to set up to be able to input to the system design and logistic support elements. Therefore Logistic Support Elements must be planed/developed/supplied with the main combat system concurrently and performance and logistic supportability of the comabat system had better be improved mutually. This report describes maintenance concept changes of weapon systems, fault diagnosis function and test equipment state on the domestic MBT(main battle tank). And then it presents application and intensification of itself fault diagnosis system for a domestic future MBT considering connection with IETM(Interactive Electronic Technical Manual) and TE(Test Equipment).

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.469-471
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• 2004

기존의 전화기 자판은 여러 번의 키 누름에 의해 입력해야 하는 숨겨진 자음과 모음의 배열 때문에 문자 입력에 많은 불편이 따른다. 본 논문에서는 보다 쉬운 한글 입력을 위해서 휴대용 전화기의 키패드(Keypad)에 대한 분산형 한글 자판 배열과 그 자판 배열을 이용해서 쉽게 한글 문자를 입력할 수 있는 사용자 중심의 대화형 방법을 제시한다. 모든 단자음과 단모음이 키에 나타나 보이도록 중복 할당시키고 입력하고자 하는 글자를 구성하는 자소를 필기순서에 따라 해당키를 한번씩만 눌러서 입력할 수 있도록 했다. 또한 복자음이나 복모음의 입력을 글자의 필기 순서와 동일하게 입력하도록 하여 사용자의 문자 입력에 대한 부담이 최소화 되도록 했다. 모의실험을 통하여 기존의 방식보다 입력에 필요한 키 동작의 횟수가 줄었음을 확인했다.

• Proceedings of the Korea Society for Simulation Conference
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• 1995.10a
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• pp.0-0
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• 1995

Simulation tools are widely used for performance evaluation of newly proposed systems. However, many industrial simulation projects fail to attain the original goals ,especially when very complicated decision logics of the experienced operatorsare needed to be modeled. We propose a technique to overcome the oabstacles. In the proposed technique, complicated decision logics are not directly modeled but an interface for interactive input is provided in the model. While running the simulation model in concurrent animation mode, whenever operator's decisions are needed an interfce screen is displayed for operator's decisions. The operator then makes decisions using the information which is provided by the animation proces itself. This technique was successfully applied to an industrial simulation projects in which alternatives were evaluated for increasingthe color lot size of car print shop.

• Journal of the Korean Home Economics Association
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• v.34 no.2
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• pp.367-378
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• 1996

The purpose of this study was to utilize of the CAD system in pattern making process for women's bodice sloper, especially in education of the drafting. Accumark 540 System was used for this study. The drafting program was developed by the use of macro program in CAD system. The results from this study : 1. The Lim Won Ja's system of bodice sloper was selected in this study. The hand drafting of the system was arranged developing the macro program of bodice sloper. 2. The program consists of eight subprograms I sequence of the drafting order. In running this developed program, proper figure is drafted by inputing data. And the drafting process is automatically presented in interactive mode. 3. It has been developed to input the function of French Curve Ruler to increase the effectiveness of curved line treatment. The program can also be used in the curve part to present the manualy sensible function. 4. In case of education of drafting bodice sloper, the program provides the high accuracy, efficiency and a strong interest nterest in pattern making process by utilizing CAD system.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.10
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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.

• Proceedings of the KIPE Conference
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• 2017.07a
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• pp.439-440
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• 2017

본 논문에서는 지능형 반도체 변압기를 구성하는 Dual Active Bridge (DAB) 컨버터와 계통 연계형 인버터와의 연결에 따른 임피던스 영향을 분석하기 위해 컨버터의 입력 임피던스와 인버터의 출력 임피던스 각각에 대한 전달함수를 분석하고자 한다. 이를 통해 인버터와 컨버터 간의 임피던스 영향을 이론 분석과 모의 시험을 통해 확인하고, 제어기의 설계 방향을 제안하고자 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.6 no.6
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• pp.7-14
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• 1998

A graphic user interface program for the design of vehicle suspension system is developed in this work. Graphic templates are designed by using a graphic language and a library and given to users for interactive data input. Several suspension types are graphically given, and the information of hard points can be directly provided on the graphic templates by users. The information is saved in a data structure which can be efficiently accessed, and transformed into another data format. The data transformation is for the interface to an analyzer by which suspension design characteristics can be calculated.