• Journal of the Korea Society for Simulation
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• v.10 no.4
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• pp.31-40
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• 2001

The flight simulator should be made like a actual flight. For the scene of sight, instrument should show the condition of flight and the pilot should catch the altitude, speed, pose and rate of lift of the airplane. This paper describes visual training program of driving airplane in practice. It is for beginners using joystick in PC, implements airplane physical equations. Flight simulator in it implements airplane panel parts in order to make simple modeling, And it uses rendering technology to implement vision parts of panel. It uses double buffering In make it faster and more efficient..

• Journal of Industrial Technology
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• v.23 no.A
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• pp.63-68
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• 2003

Non-destructive method by tomography for safety diagnosis of civil engineering and building structures is tried. There are traveltime tomography that uses traveltime and fullwave tomography that uses the initial shock and seismic amplitude. But these methods have difficulty and weak points in accuracy and selection of initial value. In this study, corrected inversion method which is able to solve the two difficulty and this method is applied to theoretical pier model to calculate tomography.

• Proceedings of the KSR Conference
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• 2003.05a
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• pp.487-492
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• 2003

This paper designs a Korea train identification module using a RFID system. Frequency bandwidth transmits and receives messages using the 27.095Mhz and 4.234Mhz in the ISM bandwidth. The mode of the modulation uses a transmission ASK and a receiving FSK. And it uses a reader and transponder using an active transponder. We use the loop antenna which the antenna has the directional.

• Magazine of the Korean Society of Agricultural Engineers
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• v.26 no.2
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• pp.125-132
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• 1984

A physically-based, distributed, parametric hydrologic model PARK 10 is described and its test results with three agricultural watersheds are presented. The model uses a rectangular grid system to depict hydrologic characteristics of a watershed, and thus, has potentials of identifying the effects of changes in land uses and/or other activities. The model is being tested with small watersheds in the pennisula.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.1035-1037
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• 1993

Thermo motor that uses driving part as heating part is different from general fan heater. As it uses energy that drives rotor and generate heat at the same coil, it is simpler and cheaper than general fan heater. In this study, shaded-pole motor was used that is low cost and simple in spite of low efficiency.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.30-32
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• 1994

This paper presents a new method for the computation of fault location in multi-terminal transmission lines. This technique based upon the distributed model of transmission lines to overcome the problems encountered in traditional approaches. This method uses, the magnitude of the differential currents at each terminal and also uses an algorithm an equivalent conversion from an multi-terminal to a 3 terminal system.

• Proceedings of the KIPE Conference
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• 2015.11a
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• pp.185-186
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• 2015

This paper introduces general single PLL(Phase Locked Loop) algorithm and compares with proposed PLL method. The suggested PLL uses low pass filter to reduce high harmonics in real grid and uses feed forward method to compensate phase delay of the low pass filter.

• Journal of the Korea Society for Simulation
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• v.10 no.3
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• pp.95-103
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• 2001

Rendering of 3D terrain data in real-time is difficult because of its large scale. So, it is necessary to use level-of-detail(LOD) that uses fewer data, but makes almost similar image to the original. We present an algorithm for real-time LOD generation and rendering of 3D terrain data. The algorithm applies wavelet transform to the terrain data, and then generates quadtree based view-dependent LOD using wavelet coefficients that are the output of wavelet transform. It also uses frame-to-frame coherence and view culling for high frame rates.

• The monthly packaging world
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• s.132
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• pp.100-111
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• 2004

• The monthly packaging world
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• s.242
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• pp.80-85
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• 2013