• 한국의류학회지
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• 제35권9호
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• pp.1125-1137
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• 2011

This study investigates when and why the light pink Dan-ryoung appeared as part of the official uniform of the Joseon Dynasty and which official uniform used the light pink color. The Annals of the Joseon Dynasty, books written by scholars, and related laws were used as research materials. The following results were obtained by analyzing the arguments of kings and officials on light pink uniforms and laws related to official uniforms. 1. Red was the color of the king as well as the color of Dang-sang-gwan's Gong-bok (one of the official uniforms). 2. The colors such as To-hong, Dam-hong, Do-hong, Bun-hong, Cheon-hong that appeared in Sang-bok (among official uniforms) were relatively lighter than red. 3. To-hong started to be used in Sang-bok at the time of King Se-jong and was used at the time of King Seong-jong in Sang-bok because it was the preferred color. 4. In the Joseon Dynasty, safflower (the basis of red color dye) was cultivated extensively; in addition, people liked red dyeing because it was relatively easy apply; subsequently, a ban on red dyeing was continually issued. 5. Kings Se-jong and Jung-jong ordered officials to use Do-hong and Bun-hong to distinguish the red color of the king. After Im-jin-oe-ran, Cheon-hong was officially designated the color of Sang-bok. 6. The reasons why Dam-hong was used in official uniforms were twofold: the preference for red-like colors and the influence of the Confucian hierarchy to distinguish the king.

• 수산해양기술연구
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• 제17권1호
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• pp.7-11
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• 1981

The author carried out an experiment to find out the responsing patterns of filefish, Stepha nolepis cirrhifer (Temminck et Schlegel) to the color lights. The experimental tank (360LX50WX55H cm) was set up in a dark room. Six Longitudinal sections each being 60 em intervals are marked in the tank to observe the location of the fish. Water depth in the tank was kept 50 em level. Light bulbs of 20W were placed at the both ends of the tank to be projected the light horizontally into the tank. Two different colored filters were selected in combination from four' colors-red, blue, yellow, and white, and were placed in front of the light bulbs to make\ulcorner different light of color. Light intensity were controlled by use of auxiliary filters intercepted between the bulb and the filter. The fish were acclimatized in the dark for 40 minutes prior to employ in the experiment. Upon turning on the light, the number of fish in each section was counted 40 times in every 30 seconds, and the mean of the number of fish in each section was given as the gathering rate of the fish. The results obtained are as follows: 1. Color of light, to which the fish gathered abundantly was found in the named order of blue, white, green, and red. 2. The differences of gathering rate upon arbitary combined two color lights were shown significant, and the differences increased remarkably in accordance with the lapse of illuminating period.

• Environmental Engineering Research
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• 제23권2호
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• pp.205-209
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• 2018

The spectral composition of light can affect the growth and biochemical composition of photosynthetic microalgae. This study examined the use of light filtering through a solution of soluble colored additives, a cost-effective method to alter the light spectrum, on the growth and lipid production of an oleaginous microalga, Nannochloropsis gaditana (N. gaditana). Cells were photoautotrophically cultivated under a white light emitting diode (LED) alone (control) or under a white LED that passed through a solution of red and yellow color additive (4:1 ratio) that blocked light below 600 nm. The specific growth rate was significantly greater under filtered light than white light ($0.2672d^{-1}$ vs. $0.1930d^{-1}$). Growth under filtered light also increased the fatty acid methyl ester (FAME) yield by 22.4% and FAME productivity by 80.0%, relative to the white light control. In addition, the content of saturated fatty acids was greater under filtered light, so the biodiesel products had better stability. These results show that passing white light through an inexpensive color filter can simultaneously enhance cellular growth and lipid productivity of N. gaditana. This approach of optimizing the light spectrum may be applicable to other species of microalgae.

• 한국컴퓨터그래픽스학회논문지
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• 제16권2호
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• pp.39-45
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• 2010

물체의 색은 모양과 더불어 사람이 바깥세상의 사물을 알아보는데 중요한 역할을 한다. 이런 색상을 인식하는 것은 태양과 같은 빛이 존재하기 때문이다. 빛은 여러 파장들로 구성되어 있으며, 눈에 보이지 않는 적외선, 자외선의 영역과 색을 인식시켜 줄 수 있는 눈에 보이는 가시광선 영역 등으로 이루어져 있다. 이러한 모든 파장의 빛이 균등하게 혼합되면 그 빛은 흰 색을 띄게 되며, 이를 백색광이라고 한다. 백색광이 굴절이 이루어지면 그 구성되어져 있는 가시광선 영역이 여러 가지 색으로 갈라지는데 이것을 분산현상이라 한다. 본 논문에서는, 백색광을 무지개의 대표적인 일곱 가지 색상으로 구성하고 자연의 분상현상을 시뮬레이션하기 위해 N색 분산 포톤 매핑 방법을 제안하였다.

• 한국태양에너지학회 논문집
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• 제31권2호
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• pp.31-36
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• 2011

LED is expected as an environmentally friendly next generation light source with its good reliability and long lifetime. The light sources for illumination have a variety of applications in the indoor and outdoor, and the variation of optical power and color rendering of the light source limits their applications. Therefore, it is necessary to research the LED lamp and its luminaire to minimize the variation of dynamic characteristics and to improve the color rendering due to that illuminating environment. Daylight is very good light source to human and can be used as primary or a secondary light source with benefits of energy, productivity and health.This paper presents the design method of LED lighting system to improve poor property in terms of CR(color redering) characteristic to use daylight effectively.

• Animal Bioscience
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• 제34권11호
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• pp.1870-1878
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• 2021

Objective: The objective of this experiment was to investigate the effects of different colors produced by light emitting diode (LED) on Brown Tsaiya ducks. Methods: A total of 144 female Brown Tsaiya ducks were randomly allocated into three individual cage rearing chambers with different LED illumination colors as treatments. Three different treatments were: i) white color, ii) blue color, and iii) red color. The experiment periods were from ducks 21 to 49 weeks of age, determined traits included i) egg laying performance, ii) feed intake, iii) egg shell breaking strength, iv) egg shell thickness, v) egg Haugh unit, vi) egg weight, vii) serum Estradiol and Progesterone concentration, and viii) behavior pattern. Results: The results indicated that when compared with white and blue color, red color could stimulate ducks sexual maturation and raised the egg laying performance. The red light group was also observed to have the highest feed intake among three treatments. The blue treatment had the lowest egg shell breaking strength and the highest egg weight among three treatments, nevertheless, no significant difference was observed among three treatments on egg shell thickness and egg Haugh unit. The red light group had higher serum estradiol concentration than the white and blue groups, but no significant difference among treatments on the serum Progesterone concentration was found. The results of behavior pattern indicated that red light group showed more feeding and less resting behavior compared to the blue light group. Conclusion: We found a potential of applying red light illumination in the indoor laying duck raising system with positive results on egg laying performance and acceptable egg weight, equivalent egg qualities compared to white and blue light.

• Agricultural and Biosystems Engineering
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• 제1권2호
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• pp.81-87
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• 2000

Quality characteristics of tomatoes irradiated with light (red light of far-red light followed two days later with a red light treatment), treated with ethylene, and stored in darkness were evaluated by subjective sensory and objective physical and chemical evaluations. Overall and individual liking evaluations and sensory evaluations were made by an untrained panel of eighteen people. A rankin gof treatments for consumer (panelist) acceptability was also conducted by the panel. Physical and chemical evaluations included surface color measurement (L*, a*, and b*), mechanical puncturing (firmness), soluble solids content (SSC), titratable acidity(TA), and tomato juice pH. Sensory data showed that outside color, inside color, and flavor of tomatoes treated with red light (R) and far-red light/red light (FR/R) were scored significantly higher than those of tomatoes treated with ethylene and those kept in darkness. The L* values for tomatoes treated with R and FR/R were lower (more darkening) than those for tomatoes treated with ethylene and those stored in darkness. Tomatoes treated with FR/R had the highest A* values, followed by those irradiated with R, treated with ethylene, and kept in darkness, respectively. Sensory values for firmness were similar for tomatoes treated with R, FR/R, and ethylene. Treatments had no significantly different effects on sweetness and acidity. There were no significantly different effects between treatments for pH, SSC, TA, and SSC/TA. From observations made during the study, it was suggested that R irradiation stimulated red color development in tomatoes after it had been delayed by FR irradiation. Consumer acceptability for tomatoes with either R or FR/R treatment was significantly higher than that for tomatoes treated with ethylene or stored in darkness. panelists' overall liking scores correlated well with all sensory variables except acidity, and also correlated highly with inside color, flavor, and sweetness (P<0.001). Overall liking versus flavor had the most pronounced relationship (r=0.78, P<0.001).

• 한국결정성장학회지
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• 제17권3호
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• pp.108-112
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• 2007

광원에 따라 색상이 변화하는 cubic zirconia 단결정을 skull melting 법으로 성장하였다. Co와 Nd에 의해서 황색 영역의 강한 흡수가 일어나며, Fe에 의해 보라색 영역의 흡수가 일어남에 따라 광원이 형광등에서 백열등으로 변화할 때 청-녹색에서 적-자색으로 변화가 발생한다. 첨가물에 의해서 뿐만 아니라 yttria 함량과 열처리 조건 변화에 의해서도 결정의 색이 변화하였다.

• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2001년도 하계 학술대회 논문집(KISPS SUMMER CONFERENCE 2001
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• pp.265-268
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• 2001

내용에 기반한 동영상 검색에서, 대표 프레임을 자주 이용하는데, 이를 위해 우선적으로 동영상의 장면변화를 검출하는 기술이 필요하다. 일반적으로 컬러 히스토그램 비교방법이 많이 쓰이나, 급격한 조명변화에 민감하고 컬러 히스토그램 분포가 비슷한 부분의 장면전환을 놓칠 수 있다는 단점이 있다. 본 논문에서는 컬러 히스토그램 비교방법과 엔트로피를 복합적으로 이용하여 조명변화에 의해 장면전환이 잘못 검출되는 것을 막을 수 있다. 실험을 통해 제안한 방법은 컬러 히스토그램 비교방법보다 조명변화에 보다 감격함을 확인할 수 있었다.

• 조명전기설비학회논문지
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• 제23권1호
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• pp.18-26
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• 2009

최근, 에너지 절감 및 환경보전의 한 방법으로서 LED광원을 이용한 고효율 조명기기의 요구가 증가하고 있다. 그러나 LED광원을 이용한 조명기기는 실내공간의 용도 및 사용자에 대한 고려를 배제한 채, 색상 및 패턴이 결정되어 시각적 불쾌감을 초래하고 있다. 이에 본 연구는 LED광원을 이용한 국부조명의 CCT의 변화가 작업자의 시작업 성능에 미치는 영향을 분석하여 실내공간의 용도 및 사용자를 고려한 조명 설계에 기초자료를 제시하고자 한다. 본 연구를 위해 2 종류의 LED광원과 1종류의 형광광원을 선정하였으며, 대학생 30명을 대상으로 오류수정작업과 읽기작업에 대한 정확도 및 소요시간을 평가하였다. 시작업 성능평가 결과, LED광원에서 오류수정 작업의 정확도는 형광광원에 비해 최대 2.5[%]가 증가되었으며, 소요시간은 최대 17.1[%]가 감소되었다. 또한 읽기작업 결과 소요시간은 LED광원에서 20.6[%]가 감소하였다.