• 방송과미디어
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• 제6권2호
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• pp.84-101
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• 2001

In this paper, we present a primitive system design of a super multi-view(SMV) 3-D display system based on a focused light array(FLA) concept using reflective vibrating scanner array(ViSA). The parallel beam scanning using a vibrating scanner array is performed by moving left and right an array of curvature-compensated mirrors or diamond-ruled reflective grating attached to a vibrating membrane. The parallel laser beam scanner array can replace the polygon mirror scanner which has been used in the SMV 3-D display system based on the focused light array(FLA) concept proposed by Kajiki at TAO(Telecommunications) Advancement Organization). The proposed system has great advantages in the sense that it requires neither huge imaging optics nor mechanical scanning pals. Some mathematical analyses and fundamental limitations of the proposed system are presented. The proposed vibrating scanner array, after some modifications and refinements, may replace polygon mirror-based scanners in the near future.

• 한국광학회지
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• 제12권3호
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• pp.235-239
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• 2001

본논문에서는 반강유전성 액정의 in-plane tilt 각이 약 $22.5^{\circ}C$인 특성을 가진다는 것을 이용하여 액정의 위상지연을 $\lambda/2$로 설계한 광대역 $\lambda/4$필름을 사용한 단일 편광판 모드 반사형 LCD의 구조를 제안하였으며 이구조의 여러 가지 광특석을 전사모사 해보았다. 실제 실험에서는 in-plane tilt 각이 $\24.9\lambda$인 Chisso상의 CS-4001 반강유전성 액정을 사용하여 액정 셀의 위상지연을 $\lambda/2$로 설계하여 각도에 따른 반사특성과 파장에 따른 분광특성을 측정하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.972-975
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• 2003

We have performed computer simulation to obtain electro-optic characteristics of reflective hybrid aligned nematic liquid crystal displays driven by fringe field. The results show that the optimal retardation value of the cell is $0.289{\mu}m$, which allows for the cell to have a practical cell gap of larger than $3{\mu}m$ when manufacturing. A reflectance of the dark state is only 0.114% for an incident light 550nm. At this condition, the light efficiency of white state reaches 92.7%. Further, we have studied a new reflective display with polarizer, optical compensation with half plate, LC plus reflector. The display with optimized cell parameters shows low wavelength dispersion and the contrast ratio greater than 5 over exists about $120^{\circ}$ in vertical direction and $160^{\circ}$ in horizontal direction.

• 한국해안해양공학회지
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• 제19권3호
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• pp.183-193
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• 2007

부분반사 전면 및 완전반사 후면을 갖는 반무한 방파제 및 방파제 개구부에 의한 파의 산란 현상에 대한 해석 해를 유도하였다. 이는 수심이 일정하고 파가 방파제에 직각으로 입사하는 경우에 적용 가능하며, 선형파 이론에 근거하여 변수 변환 및 좌표 변환을 통해 지배 방정식을 상미분 방정식으로 전환하여 구하였다. 본 연구에서 유도된 해석 해는 유한 요소 수치 모델의 결과와 비교하여 그 정확도를 비교하였는데, 꽤 정확한 결과를 보인다는 것을 알 수 있었다. 유도된 해석 해를 이용하여 방파제에서의 반사율에 따른 항 입구에서의 정온도에 미치는 효과를 조사하였다.

• 한국생산제조학회지
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• 제18권6호
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• pp.697-701
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• 2009

A simple method for the fabrication of porous nano-master for the anti-reflection effect on the transparent substrates is presented. In the conventional fabrication methods for antireflective surface, coating method using materials with low refractive index has usually been used. However, it is required to have a high cost and long processing time for mass production. In this paper, we developed a porous nano-master with anti-reflective surface for the molding stamper of the injection mold, hot embossing and UV imprinting by using the aluminum anodizing process. Through two-step anodizing and etching processes, a porous nano-master with anti-reflective surface was fabricated at the large area. Pattern size Pore diameter and inter-pore distance are about 130nm and 200nm, respectively. In order to replicate anti-reflective structure, hot embossing process was performed by varying the processing parameters such as temperature, pressure and embossing time etc. Finally, antireflective surface can be successfully obtained after etching process to remove selectively silicon layer of AAO master.

• 설비공학논문집
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• 제28권12호
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• pp.509-514
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• 2016

From the point of view to prevent airborne infection-related diseases such as H1N1, SARS, and MERS, an actual application of air cleaning and purification systems including technologies like UVGI has become increasingly important. Recently, an air purification system using REME (Reflective Electro Magnetic Energy) developed in the U.S. is applied for indoor air purification and sterilization technology to counteract the outbreak of new airborne infections. In this study, an air sterilization performance experiment using REME was carried out. The results verified that air sterilization performance in the case of installing a REME system in a medical center was 31%, namely the number of floating bacteria decreased by 31% after only a five-day operation. In addition, the number of culture collections in the REME operating air conditioning systems using nonpathogenic Geobacillus stearothemophilus as a biological indicator decreased maximally to 67%. A field application of REME technology will be useful to prevent airborne infection-related diseases, especially in response to public health crises due to the advent of emerging diseases.

• Journal of Information Display
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• 제12권1호
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• pp.5-10
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• 2011

A novel architecture and proprietary electronic inks were developed to provide disruptive digital-media solutions based on an electrokinetic technology platform. The flexible reflective electronic media (eMedia) was fabricated by imprinting three-dimensional microscale structures with a roll-to-roll manufacturing platform. The HP technologies enable the required attributes for eMedia, such as low power, transparency, print-quality color, continuous levels of gray, and lowcost scalability. Pixelation was also demonstrated by integrating with the prototype oxide thin-film transistor backplane, and the system architecture was further developed by stacking primary-colorant layers for color reflective-display application. The innovations described in this paper are currently being developed further for the eSkins, eSignage, and ePaper applications.

• 반도체디스플레이기술학회지
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• 제21권2호
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• pp.112-116
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• 2022

The demand for a rear reflective material is continuing according to the expansion of the bifacial soar module and the effect on the re-reflection of the ground using a back sheet that is not used due to the increase in the supply of the bifacial solar module was confirmed. For analysis, a bifacial solar module with an output of 445W was connected to a single inverter of 49.84kW, and analysis of each two inverters was carried out. In the analysis of the results, it was confirmed that the generation amount increased by 5.25% compared to the case where the back sheet reflective film was not installed and it was confirmed that the increase in the generation amount was the noon time when strong solar radiation was irradiated, not the time of sunrise and sunset.

• 한국의류학회지
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• 제11권3호
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• pp.89-99
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• 1987

The purpose of this present study is not only to investigate mutal relationship between the preference of clothing design and the nature of Reflectiveness-Impulsiveness, but to offer clothing design for desirably developing of child, especially of preschool children. And the practical research was performed for 166 preschool children who are in kindergarten located in Seoul and are selected according to their sex and social class. This study used Kagan's MFFT and Personality Inventory of Hwang Eung-Yeon for the test of Reflectiveness-Impulsiveness, while for the preference of clothing design used the photo deck which is showed to children. The data analysis was based on frequency, percentage, mean, standard deviation, chi-square ($x^2$) test, t-test, F-test, and Duncan's Multiple Range Test. It can be concluded that girls rather than toys, high class children rather than middle or low class children were more reflective as a general trend. The relationship between the preference of clothing design and the nature of Reflectiveness and Impulsiveness is as follows : 1. In color, reflective boy liked blue series and reflective girl liked pastel coloring series, while they disgusted red series and non-coloring series. The group of impulsiveness liked red series, while they disgusted non-coloring series. 2. In color combination, group of reflectiveness liked similar color, while group of impulsiveness liked contrasting color. 3. In texture, group of reflectiveness liked soft and shiny texture, while they disgusted thick and rough texture. Also Group of impulsiveness liked soft texture. 4. In pattern, reflective boy liked lettering pattern and reflective girl liked flower pattern, while she disgusted lettering pattern. Impulsive boy liked stripe pattern and limpulsive girl liked flower pattern. 5. In pattern size, group of reflectivenss liked small size, while group of impulsiveness liked large one. 6. In style, group of reflectiveness liked formal style.

• 한국과학교육학회지
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• 제32권4호
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• pp.703-716
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• 2012

본 연구에서는 교사의 학습이 일어날 수 있는 반성을 Davis(2006)의 '생산적 반성'으로 개념화하고 생산적 반성의 관점에서 초등 예비교사의 반성 저널 44개를 분석하였다. '생산적 반성'이란 한마디로 교사의 학습을 증진시킬 수 있는 반성을 말하며 반대로 '비생산적인 반성'이란 수업의 여러 측면들을 단순히 기술하며 분석이 거의 없고, 여러 아이디어를 연관시키기보다는 나열만 하는 경우를 말한다. 생산적 반성이 일어나고 있는지의 여부는 수업의 제 측면('지도', '내용 지식', '학습자/학습', '평가')을 얼마나 연결지어 생각하는지(통합), 그리고 얼마나 분석적으로 생각하는지(분석)로 살펴볼 수 있다. 분석 결과 초등 예비교사는 자신의 수업에 대한 반성에서 대부분 '지도', '내용 지식', '학습자/학습'의 세 측면을 포함하고 있지만(86.4%) '학습자/학습'이나 '내용 지식'의 측면을 강조하는 경우(각각 36.4%, 15.9%)보다는 '지도'측면을 강조하는 경우가 훨씬 많았다(86.4%). 이에 반해 '평가'측면은 반성 저널에서 언급된 경우가 거의 없으며 전혀 강조되고 있지도 않았다. 수업의 제 측면을 연관 지어 생각하거나 분석적으로 생각하는 생산적 반성의 수준은 다소 낮은 것으로 나타났다(4점 만점에 1.8점). 반성 저널의 대부분은 '학습자/학습'과 '지도'두 가지 측면에서만 통합을 보였으며(72.7%) 전혀 통합이 없는 저널도 22.7%나 되었다. 이러한 결과는 예비교사가 수업에서 일어난 일을 해석하고 수업의 대안을 모색하는 과정에서 평가 측면을 보다 주목하고 고려할 수 있도록 하고, 피드백이나 토론 등을 통하여 수업의 제 측면을 연관시키고 통합시킬 수 있도록 안내하는 것이 필요함을 시사한다.