• Journal of the Korean Institute of Telematics and Electronics
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• v.24 no.1
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• pp.149-158
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• 1987

This paper describes the SEAS which is a 2-dimensional graphic editor for schematic circuit and IC mask layout. This system runs on general purpose computer and Tektronix 4110 series graphic terminal. With this system, user can edit schematic circuits and/or IC mask layout with 2 level hierarchy. This system supports more than 20 kinds of built-in symbol, user definable internal symbols, 60 macros, 16 function keys, 4 level on-screen menu operation and edit-in-place of cell in main drawing. And it provides editing functions such as reflection, rotation, move and copy of one or a group of elements, and modification of polygona geometry etc. To improve the excution speed, we used local memory of graphic terminal. For the portability of the program, the system is written in FORTRAN 77 programming language.

• 한국도로학회:학술대회논문집
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• 2004.02a
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• pp.29-34
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• 2004

• 한국도로학회:학술대회논문집
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• 2003.10a
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• pp.69-75
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• 2003

• Geophysics and Geophysical Exploration
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• v.6 no.4
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• pp.195-198
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• 2003

In this study, we have developed a 3-D visualization program that is helpful in the interpretation or comparisons of geologic and geophysical data, which have been acquired to understand the cause of ground subsidence in the residential area and to establish reinforcement strategy. The visualization program was developed under the Windows operating system for convenient use and easy understanding. It uses Visual C++ for the Graphic User Interface and the OpenGL for graphic handling. Since this program is user-friendly, even users who do not have the basic idea about GIS or CAD can get very useful information with this program. The applicability of the program has been verified by visualizing the real core log and resistivity tomography images obtained from the ground subsidence area. These results have shown that the program is very useful for comparisons of these two data for the interpretation of subsurface structures.

• The Journal of the Korea Contents Association
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• v.8 no.7
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• pp.146-152
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• 2008

In the modern times, video media area is dramatically developing and growing. The motion graphic that is one of video presentation technique as an effective communication way between sender and receiver is beginning to make its appearance. The motion graphic provides the clearance of visual information to deliver it more easily and accurately and improves the effect of communication to increase the effect of image and information delivery. In this research, the writer wants to examine the production method of motion graphic to improve convenience and efficiency of communication to the better direction for production process by researching and analyzing the title design and its structure having short and significant information delivery and strong visual presentation function.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.10
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• pp.184-193
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• 2001

In vector control technique, stator currents of an induction motor are transformed to equivalent d-q currents in a reference frame consist of d and q axis, each of which is coincide with flux and torque direction respectively. Since the current in q-axis is related to the torque in a synchronously rotating frame, torque is estimated as a function of q-axis current and flux. In this paper, a method to estimate torque of an induction motor based on the measurement of 3-phase currents and rotating velocity of a rotor is presented. Graphic-programming is used to measure signals, to estimate the torque and to show the result in the form of user friendly graph in window environment. To stabilize the fluctuation of estimated torque caused from the small measurement error of the rotor velocity, the stator current is reconstructed in a program based on measured signals. The experimental results executed under the velocity of 500 rpm, 1500 rpm without load and 1500 rpm with load show that the proposed method estimates the torque very well.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.627-630
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• 2005

This paper describes the development of a racing game with three-dimensional computer graphics as one of web-based game contents. Client user using web can access and run java applet program with download of Java Bytecode with the independence of hardware system. It consists of graphic user interface module, initial space generation module, event handler module, and thread control module. It uses 2-D linked list data structure for the 3-D graphic objects that are located in three-dimensional space for high-speed object searching and sorting. It enhances the dynamic object moving and viewing in three-dimensional space. We can use the developed racing game to inform game users of information for an advertisement like tourism information, and can apply the proposed 3-D drawing technology to 3-D game graphic engine core.

• Proceedings of the Korean Geotechical Society Conference
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• 1991.10a
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• pp.179-194
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• 1991

This paper explains outline of a behavior analysis program for underground structures, and its application to a tunnel problem. The program can deal with elasto-plastic behavior of medium and supporting structures, discontinuous behavior due to existing joint, creation and propagation of cracks. in-situ loading condition, and incremental behavior due to stepwise excavation, etc. The program also has additional capabilities such as graphic output of mesh, displacement pattern, stress condition, and safety factor contour, and automatic mesh generation during the excavation steps.

• 전기의세계
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• v.30 no.7
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• pp.448-453
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• 1981

To solve alternating magnetic field problems, the program TDEDDY is developed with the use of the finite element method. Triangular finite elements of the first order are employed for the discretization of the field region. This program is constructed through an interactive system to check errors immediately when every routine is executed, and several subprograms are employed for the graphic representation of computed results. As an example, it is applied to a model of semi-infinite slab excited by an alternating current source. Results by the program TDEDDY show the satisfactory accuracy in comparision with those of analytic calculations.

• Journal of computational fluids engineering
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• v.18 no.2
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• pp.72-77
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• 2013

The Pre-processor program for CFD is being developed using wxWidgets and OpenGL libraries. This program can be run on both Windows and Linux operating systems. Undergraduate students and beginners can learn and use this very easily by menu and templates. Until now, structured mesh can be created in Cartesian or Cylindrical coordinates. This program will be used easily to make various type of meshes using templates.