• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.1621-1624
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• 2004

본 논문에서는 2차원 공간상에서 윈도우에 출력되는 사각형 이미지가 윈도우 영역을 벗어날 때 영역 패턴을 이용한 절단 알고리즘을 제안한다. 제안하는 알고리즘은 Cohen-Sutherland의 알고리즘을 응용하여 사각형 이미지의 절단영역을 계산하는데, 약 4회의 조건문장과 1회의 분기문장을 사용하여 수행되므로 기존의 방법보다 전체적인 수행 성능이 약 12% 좋게 나타났으며, 특히 확장영역에 있어 기존의 방법은 처리하지 못하는 부분까지도 완벽하게 처리됨을 확인 할 수 있었다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.9
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• pp.964-970
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• 2002

In this paper, cruciform radiation pattern antenna was designed and fabricated. The fabricated antenna is applicable to intersections which is composed of four eight-lane roads each having 60 m of width and 200 m of length. The design theory was based on Woodward-Lawson method and the 6 monopole elements with the strip feeding network are made by linear array on the micro-strip board. In the results, - 13.5 dB of return loss and 120 MHz(6 %) of -10 dB bandwidth were obtained at the 2 GHz. Also, at 1.95 GHz, -6 dB of gain fall was seen at $\pm$45$^{\circ}$ and thus, it is possible to say that the presented antenna has well-shaped cruciform radiation pattern.

• Proceedings of the Materials Research Society of Korea Conference
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• 2008.11a
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• pp.18.1-18.1
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• 2008

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2005.10a
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• pp.84-88
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• 2005

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2005.05a
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• pp.124-124
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• 2005

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2007.04a
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• pp.86-89
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• 2007

• Information Display
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• v.23 no.5
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• pp.33-43
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• 2022

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.1034-1037
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• 2005

The variation of shapes and related properties of ZnO nanostructures grown on the metal pattern and Si substrate have been investigated. Ni, Cr metal patterns were formed on Si (111) substrates by e-beam evaporation, and ZnO nanostructures were fabricated on it by using thermal evaporation of Zn powder in air. Growth temperature was controlled from 500 $^{\circ}$C to 700 $^{\circ}$C. When the growth temperature was relatively low, no considerable effect was found. However, UV emission intensity decreased, and Green-emission intensity, which is regarded as originated from the defect state in the ZnO nanostructure, increased as growth temperature increase. Also, the variation of nanostructure shape at high temperature (700 $^{\circ}$C) is understood in terms of the enhanced incorporation of metal vapor during the nanostructure formation.

• The Korean Journal of Applied Statistics
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• v.27 no.3
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• pp.373-386
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• 2014

A word cloud is a visualization of word frequency in a given text. The importance of each word is shown in font size or color. This plot is useful for quickly perceiving the most prominent words and for locating a word alphabetically to determine its relative prominence. With dynamic graphics, we can find the changing pattern of prominent words and their frequencies according to the changing selection of chapters in a given text. We can define the word frequency matrix. In this matrix, rows are chapters in text and columns are ranks corresponding to word frequency about the words in the text. We can draw the word frequency matrix plot with this matrix. Dynamic graphic can indicate the changing pattern of the word frequency matrix according to the changing selection of the range of ranks of words. We execute an English Bible text visualization using word clouds and dynamic graphics technology.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.673-676
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• 2006

본 논문은 산업현장의 불균등한 조명 조건에서 정확한 카메라 교정을 수행할 수 있는 방법을 제안한다. 비접촉 계측을 위한 카메라 교정법은 패턴에서 교정점들을 정확하게 추출할 수 있어야 하며, 평면 패턴을 사용하는 교정 방법은 최소 7개의 교정점을 알아야 한다. 그러나 비접촉 치수 계측기가 설치된 산업현장에서 카메라 교정에 알맞은 조명을 기대하기 힘들다. 본 논문에서는 최적조명제어가 어려운 산업현장에서 치수계측을 위한 카메라 교정을 효과적으로 수행할 수 있는 반자동 카메라 교정방법을 제안한다. 교정패턴상의 최소 4점을 사용자가 지정함에 의해, 조명제어의 어려움으로 인해 교정점 추출이 실패한 교정패턴의 불완전 교정점을 사용하여 이상적인 조명상태에서의 교정점 정보를 예측하고, 이 정보로부터 다시 정확한 교정인자들을 반복적으로 추출하는 방법을 적용한다. 제시된 방법은 렌즈의 투사왜곡에 의한 교정패턴에서도 성공적으로 적용될 수 있음을 실험을 통해 확인하였다.