• 제목/요약/키워드: Blue LED

검색결과 597건 처리시간 0.023초

패션에 나타난 몸의 이상화 -외면화된 코르셋으로서의 스키니 진을 중심으로- (Idealization of the Body in Fashion -Focus on Skinny Jeans as an Externalized Corset-)

  • 임은혁
    • 한국의류학회지
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    • 제35권10호
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    • pp.1215-1227
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    • 2011
  • The recent craze for so-called skinny jeans is illustrative of the restraint of the body through dress. This phenomenon is noteworthy when considering the internalization of the corset in contemporary fashion. Grown out of the garments of soundly practical use, blue jeans have led the stream of fashion for about 150 years and now they serve as the new corset idealizing the female body in the form of skinny jeans. This study intends to examine the idealization of the body in contemporary fashion and focus on skinny jeans as an externalized corset. The struggle with corsets continues in that the real body is overwhelmed by fashion items. In the aspect of idealizing the body by constraining the body parts, skinny jeans externalize the control of the body as contemporary corsets. This study conducts literature research and content analysis as the method of investigation and focuses on women's fashion from the 20th century. Exerting a harmful influence on health (as corsets have done) the body in skinny jeans is regarded as a modifiable entity. The thinness of the body achieved by skinny jeans suggests the controlling power over the body. Moreover, this gives access to the power presented by the contemporary ideal of thinness. Skinny jeans are modern day glass slippers.

MOCVD 성장조건이 InN/GaN 다층박막의 발광세기에 미치는 영향 (The Effect of MOCVD Growth Parameters on the Photolumenescence Intensity of InN/GaN Multi-layers)

  • 김현수;이정주;정순영;이정용
    • 한국재료학회지
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    • 제12권3호
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    • pp.190-194
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    • 2002
  • InN/GaN multi-layers were grown by metalorganic chemical vapor deposition(MOCVD) in order to get the appropriate structure for an high power blue-green light emitting diode(LED), and effects of growth conditions (growth temperature, pressure, and $trimethylindium(TMIn)-NH_3-N_2\; flow\; rare)$ on the integrated photoluminescence (PL) intensity and PL peak energy in InN/GaN multi-layers were investigated. The optimized growth conditions with the highest integrated PL intensity for InN/GaN multi-layers were obtained: the growth temperature at $780^{\circ}C$, the growth pressure at 325 Torr, the TMIn flow rate with 150 $m\ell$/min, the $NH_3$flow rate with 3.2 ι/min, and $N_2$ flow rate with 2 ι/min.

Lu3Al5-xGaxO12:Ce3+,Cr3+ 형광체의 결정구조 분석 및 잔광성 발광 특성 (Crystal Structure Refinement and Persistent Luminescence Properties of Lu3Al5-xGaxO12:Ce3+,Cr3+ Phosphors)

  • 김지원;김영진
    • 한국재료학회지
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    • 제30권8호
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    • pp.413-420
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    • 2020
  • Lu3Al5-xGaxO12:Ce3+,Cr3+ powders are prepared using a solid-state reaction method. To determine the crystal structure, Rietveld refinement is performed. The results indicate that Ga3+ ions preferentially occupied tetrahedral rather than octahedral sites. The lattice constant linearly increases, obeying Vegard's law, despite the strong preference of Ga3+ for the tetrahedral sites. Increasing x led to a blue-shift of the Ce3+ emission band in the green region and a change in the emission intensity. Persistent luminescence is observed from the powders prepared with x = 2-3, occurring through a trapping and detrapping process between Ce3+ and Cr3+ ions. The longest persistent luminescence is achieved for x = 2; its lifetime is at least 30 min. The findings are explained using crystal structure refinement, crystal field splitting, optical band gap, and electron trapping mechanism.

Extraction of the atmospheric path radiance in relation to retrieval of ocean color information from the TM and SeaWiFS imageries

  • Ahn, Yu-Hwan;Shanmugam, P.
    • 한국GIS학회:학술대회논문집
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    • 한국GIS학회 2004년도 GIS/RS 공동 춘계학술대회 논문집
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    • pp.241-246
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    • 2004
  • The ocean signal that reaches the detector of an imaging system after multiple interactions with the atmospheric molecules and aerosols was retrieved from the total signal recorded at the top of the atmosphere (TOA). A simple method referred to as 'Path Extraction' applied to the Landsat-TM ocean imagery of turbid coastal water was compared with the conventional dark-pixel subtraction technique. The shape of the path-extracted water-leaving radiance spectrum resembled the radiance spectrum measured in-situ. The path-extraction was also extended to the SeaWiFS ocean color imagery and compared with the standard SeaWiFS atmospheric correction algorithm, which relays on the assumption of zero water leaving radiance at the two NIR wavebands (765 and 865nm). The path-extracted water-leaving radiance was good agreement with the measured radiance spectrum. In contrast, the standard SeaWiFS atmospheric correction algorithm led to essential underestimation of the water-leaving radiance in the blue-green part of the spectrum. The reason is that the assumption of zero water-leaving radiance at 755 and 865nm fails due to backscattering by suspended mineral particles. Therefore, the near infrared channels 765 and 865nm used fur deriving the aerosol information are no longer valid for turbid coastal waters. The path-extraction is identified as a simple and efficient method of extracting the path radiance largely introduced due to light interaction through the complex atmosphere carried several aerosol and gaseous components and at the air-sea interface.interface.

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Synthesis of 5,6-Dihydro[1,10]phenanthroline Derivatives and Their Properties as Hole-Blocking Layer Materials for Phosphorescent Organic Light-Emitting Diodes

  • Lee, Hyo-Won;An, Jung-Gi;Yoon, Hee-Kyoon;Jang, Hyo-Sook;Kim, Nam-Gwang;Do, Young-Kyu
    • Bulletin of the Korean Chemical Society
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    • 제26권10호
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    • pp.1569-1574
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    • 2005
  • To develop new hole-blocking materials for phosphorescent organic light-emitting diodes (PhOLEDs), 5,6-dihydro-2,9-diisopropyl-4,7-diphenyl[1,10]phenanthroline (1) and 5,6-dihydro-2,9-diisopropyl-4-(4-methoxyphenyl)-7-phenyl[1,10]phenanthroline (2) were synthesized. While the absorption spectrum of 1 is very similar to that of 2, the photoluminescence spectrum of 1 has the feature of the narrower and blue-shifted blueviolet emission at the peak of 356 nm compared to that of 2. The HOMO and LUMO energy levels of 1 and 2 were estimated from the measurement of cyclic voltammetry, and 1 has the appropriate levels for a holeblocking layer (HBL). The use of 1 as a HBL in a green PhOLED led to good efficiency of 23.6 cd/A at 4.4 mA/$cm^2$.

영화 (2007)의 복식과 색채 상징성 - Queen Elizabeth의 복식을 중심으로 - (A Study on the Costume and Color Symbolism of the Movie - Focusing on Queen Elizabeth -)

  • 권혜수;조규화
    • 패션비즈니스
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    • 제12권5호
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    • pp.126-140
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    • 2008
  • This thesis aims to examine the symbolism of color in the clothing of women, focusing on the protagonist of the movie Elizabeth: The Golden Age (2007). At the beginning of the movie, the Queen wears gowns with cartwheel ruff and wheel farthingales, symbolizing the attempt of establishing a powerful majesty. However, the Queen falls in love with Walter Raleigh and her clothing comes to emphasize femininity displaying her cleavage. Later on, her clothing indicates charismatic authority as she prepares for the Spanish war. At the end of the movie, the Queen who led the the country to victory in war puts on a luxurious gown with butterfly wings that reminds of a fairy queen. The colors of the Queen's clothing are categorized into three groups. First, the color red represents two opposite allegories. The positive image of red denotes Christ's blood, the love of God, and noble status of the Queen's image as a savior of England. On the other hand, red represents lewdness and evil which insinuate that the Queen is being attacked on her religious and political genuineness. Second, the color blue represents Saint Maria, chastity, and divinity. Third, the color goldw and white represent the Queen's ideals which are chastity as a virgin Queen and divinity.

박형 디스플레이를 위한 도광판의 광학설계 (Optical Design of Light Guide Plate Material for Slim Liquid Crystal Display)

  • 공태원;최규진;권진혁;박인식;이선묵;우동진;곽진석
    • 한국표면공학회지
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    • 제47권5호
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    • pp.233-238
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    • 2014
  • In this paper, in order to achieve slim and light liquid crystal display, we examine the optical conditions that can obtain uniform light with higher optical efficiency over whole light guide plate (LGP) through simulation. Furthermore, to overcome the issues of hot spot in front of red, green, and blue light emitting diodes (RGB LEDs) source and non-uniform color mixing, we propose four shaped color mixing bars tied up with the LGP and check the optical characteristics of the LGP with them by simulation. Consequently, we could know the optical conditions of improving optical efficiency and optical uniformity in the LGP through the optical design. Also we confirmed that the issues of the hot spot and non-uniform color mixing in edge type LED could be solved by using the ${\bigwedge}$-shaped window color mixing bar.

공침법을 이용한 Lu3Al5O12:Ce3+ 나노 형광체 합성과 광학적 특성 분석 (Synthesis of Lu3Al5O12:Ce3+ Nano Phosphor by Coprecipitation Method, and Their Optical Properties)

  • 강태욱;강현우;김종수;김광철
    • 반도체디스플레이기술학회지
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    • 제18권4호
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    • pp.51-56
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    • 2019
  • LuAG:Ce(Lu3Al5O12:Ce3+) nano phosphor were synthesized by applying the coprecipitation method. It is used to increase the color rendering of phosphor ceramic plate for high power LEDs and laser lighting. Internal quantum efficiency and absorption of LuAG:Ce nano phosphor are 51.5 % and 64.4 %, respectively, which is higher than the previously studied nano phosphors. The maximum absorption wavelength of this phosphor is 450 nm blue light, and the emission wavelength is 510 nm. The emission wavelength shifted to longer wavelength when the concentration of Ce increased in the heat treatment of the reducing atmosphere. Thermal quenching of LuAG nano phosphor was 70 % at 200 ℃, it was explained by their significant quenching of all raman scattering modes, implying the restriction of electron-phonon couplings caused by their defects.

Analysis of Covid-19, Tourism, Stress Keywords Using Social Network Big Data_Semantic Network Analysis

  • Yun, Su-Hyun;Moon, Seok-Jae;Ryu, Ki-Hwan
    • International Journal of Advanced Culture Technology
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    • 제10권1호
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    • pp.204-210
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    • 2022
  • From the 1970s to the present, the number of new infectious diseases such as SARS, Ebola virus, and MERS has steadily increased. The new infectious disease, COVID-19, which began in Wuhan, Hubei Province, China, has pushed the world into a pandemic era. As a result, Countries imposed restrictions on entry to foreign countries due to concerns over the spread of COVID-19, which led to a decrease in the movement of tourists. Due to the restriction of travel, keywords such as "Corona blue" have soared and depression has increased. Therefore, this study aims to analyze the stress meaning network of the COVID-19 era to derive keywords and come up with a plan for a travel-related platform of the Post-COVID 19 era. This study conducted analysis of travel and stress caused by COVID-19 using TEXTOM, a big data analysis tool, and conducted semantic network analysis using UCINET6. We also conducted a CONCOR analysis to classify keywords for clustering of words with similarities. However, since we have collected travel and stress-oriented data from the start to the present, we need to increase the number of analysis data and analyze more data in the future.

고구마 무병묘의 기내 증식에 미치는 생장조절물질, Sucrose, 최소생장 보존의 영향 (Effect of Growth Regulator, Sucrose, and Minimal-growth Conservation on In Vitro Propagation of Virus-free Sweet Potato Plantlets)

  • 이나라;이승엽
    • 생물환경조절학회지
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    • 제29권1호
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    • pp.1-8
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    • 2020
  • 고구마 바이러스 무병묘의 기내급속증식을 위한 적정 생장 조절물질 및 sucrose 농도, 최소생장 기내보존(15℃)에 미치는 광의 영향과 생존율 및 기내생장 특성 등을 조사하였다. 고구마 무병묘의 마디배양은 0.2 mg·L-1 BA 첨가배지에서 줄기신장, 줄기직경, 잎수, 뿌리수, 생체중 및 건물중 등이 가장 양호하였다. 배양부위 및 배지물리성에 따른 적정 sucrose 농도는 마디배양은 5% sucrose를 첨가한 고체배지에서, 정단배양은 3% sucrose를 첨가한 액체배지에서 줄기두께, 잎수, 뿌리수, 뿌리길이, 생체중 및 건물중 등의 생육에 가장 효과적이었다. 15℃ 저온항온기에서 고구마 무병묘의 최소생장 기내보존은 암상태에서는 3개월 내에 모두 고사하였으나, 적색:청색(7:3) 혼합 LED (150±5 μmol·m-2·s-1 PPFD)에서는 5개월까지 100% 생존하였다. 따라서 고구마 무병묘의 최소생장 기내보존에는 광이 필요하며, 샬레에 밀식(10 개체/샬레)할 경우, 좁은 공간에서 대량보존이 가능하였다.