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표정인식을 위한 PCA와 템플릿 정합을 사용한 얼굴 요소 추출
우효정, 이슬기, 김동우, 류성필, 안재형 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2
This paper proposed an extracting algorithm of human facial components for the recognition of facial expressions. First face image is acquired using the Haar-like feature mask from an input image. The face image is divided into two images. One is the upper image including eye and eyebrow. The other is the lower image including mouth and jaw. The extraction of facial components, such as eye and mouth, begins getting eye image and mouth image. Then eigenfaces are produced by the PCA training process with learning images. An eigeneye and an eigenmouth are produced from eigenfaces. Result eye image is obtained by template matching the upper image with the eigeneye, and the mouth image is obtained by template matching the lower image with the eigenmouth. The simulation results show that the proposed method has superior extraction ratio than previous method.
광전효과에 대한 LabVIEW 시뮬레이션 활용 수업 연구
황효창,김재경 대구대학교 사범대학 부설 교육연구소 2008 敎育硏究 Vol.3 No.2
기초 대학 물리학 과정에 적용하기 위하여 ‘광전효과 흉내내기’ 프로그램을 LabVIEW를 이용하여 제작하였다. 이 시뮬레이션 프로그램은 수집한 데이터를 이용하여 자동적으로 도표를 그릴 수도 있으며, 교수는 이를 토대로 광전효과와 빛의 이중성에 대한 토의를 하도록 지도하였다. 이 LabVIEW 시뮬레이션 프로그램을 이용하여 대학 1학년 기초 대학물리 과정에서 광전효과를 가르친 후 전통 강의방식으로 강의한 집단과 비교하였다. 두 집단에 실시한 일련의 설문과 개인 인터뷰를 통하여 이 교육자료에 대한 흥미도와 교육효과를 분석하였다. 설문결과 LabVIEW 흉내내기 프로그램을 적용한 반의 40%가 LabVIEW 학습자료에 대해 긍정적인 반응을 보였고 부정적 반응을 보인 학생은 10% 미만이었다. 개별 인터뷰를 통해, 그들에게 친숙한 컴퓨터로 인해 전통강의보다 더욱 흥미로와 한 것을 알 수 있었다. 또 교수와 동료 학생들 간의 문답에 대해 좋은 반응을 보였다. 따라서 컴퓨터 흉내내기 프로그램은 학습과정에서 학습효과를 높이는 것으로 기대할 수 있을 것 같다. We made a simulation program which simulate photoelectric effect for the purpose of applying to basic university physics course. This program was produced by using LabVIEW. We taught freshmen photoelectric effect by using this LabVIEW simulation program and explored the education effects and interest on this simulation experiment by comparing this experimental group with the other one who studied this subject through traditional lecture. This simulation program make students to graph automatically with collected data, and teacher guides students to discuss photoelectric effect and dualism of light. The interest and the effect of two groups on this teaching material were compared by list of questions and personal interviews. Questionnaire revealed that the positive interest on the class using the LabVIEW simulation was about 40%, the negative opinions was less than 10%, and 40% of the participants said it was useful to them. From the personal interviews we could conclude that the computer itself, a familiar thing to them, made students more interesting than the dull traditional lecture. Moreover, they preferred to have questions and answers with the professor and their colleague students. Thus we could expect that the computer simulation program in learning activity heighten learning effect.
황재효,민경일 永同大學校 2001 硏究論叢 Vol.7 No.1
본 논문에서는 저 방사손실의 무차폐 유전체 투과형 공진기를 제안하고 제작하였다. 2개의 입출력 선로를 가지는 W. G. 모드 투과형 공진기는 단독 공진기나 하나의 선로를 가지는 공진기와는 공진주파수가 달라지므로 이러한 변화를 고려한 공진기의 해석방법을 제안한다. 제안된 공진기 이론을 가지고 26.8GHz에서 28.3GHz까지 계산하여 공진특성을 구하였다. 계산된 공진주파수는 단독 공진기의 공진주파수와 달라짐을 보였다. 본 연구의 결과, W. G. 모드 투과형 공진기설계를 위한 기초 자료를 얻을 수 있었다. In this study, a low radiation loss, unshielded dielectric transmission type resonator on millimeter wave is designed and fabricated. As the resonance frequency of the dielectric transmission type Whispering Gallery mode(W. G. mode) resonator which has two input/output waveguides is different from that of isolated resonator or single input resonator, a new method considering the frequency variation is proposed. With the proposed theory, the resonance frequency is calculated in frequency range 26.8GHz to 28.3GHz. We show that the calculated resonance frequency is differs from the one of the isolated resonator. As the results, a design method for transmission type W. G, mode resonator is acquired.
Al₂O₃-TiO₂ 복합체의 기계적 및 열적 특성에 미치는 MgO의 첨가효과
박재성,이상욱,남효덕 영남대학교 재료기술연구소 2000 재료기술연구 Vol.1 No.1
Aluminum titanate(Al₂O₃TiO₂ ) was known to low thermal expansions over wide temperature ranges, but showed poor mechanical properties. The present studies have been concerned with the thermal and mechanical properties of aluminum titanate based on the ceramics containing MgO. The addition of MgO powder to Al₂O₃-TiO₂ inhibited the grain growth and this result can be increased sintering density and vickers hardnes s. The thermal expansion of Al₂TiO_(5) increased with the addition of MgO and also increased with temperature up to 1000℃, however, it decreased in the temperature range between 1000℃ and 1200℃ during heating. The test of thermal shock showed that the addition of 10 wt% MgO generated macrocrack of 25%.
李相孝,박상희,金在宇 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1
This paper deals with an efficient algorithm for generating the complete test set of every fault in combinational logic circuit, and fault detection and diagnosis technique based on Boolean Difference and Partial Boolean Difference. This study is mainly concerned with nonredundant combinational logic circuits. The type of fault is either stuck-at-o or stuck-at-1, i.e. at the input of a gate or at the output of a gate. The combinational logic circuits show a fault when the describing conditions correspond with the combinational logic circuits, for detecting S-A-O, or S-A-1, the method of generating test patterns is proposed, and the detection of fault at the circuit is attempted.
任孝宰,鄭德秀,李錫鎬 湖西大學校工業技術硏究所 1999 工業技術硏究所論文集 Vol.18 No.-
This work was conducted to study the distribution of velocity field in the inlet region of evaporator for automobile HVAC(Heating, Ventilation, and Air Conditioning). By experimental and numerical simulation method, we found out that the installation position of evaporator in cool air blowing system had optimal value. Also, the porous media assumption of evaporator in computational domain assured to valid when compared with experimental results. Finally, the diffusing scroll which proved to be very efficient and silent by experimentally.