• The Korean Journal of Vision Science
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• v.20 no.4
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• pp.453-459
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• 2018

Purpose : This study was to investigate the change of accommodative functions by different color density and color of colored lenses. Methods : Participant had a normal NPC and no dyschromatopsia, phoria and eye disease, also had no histories of eye surgery in 31 students of university. Their accommodative functions were measured according to 50%, 80% density of the gray, blue, brown lens and non-colored lenses. Tests of accommodative functions performed include amplitude of accommodation, accommodative facility, relative accommodation, and accommodative lag. Results : The amplitude of accommodation and accommodation lag were increased when wearing the colored lens. Negative relative accommodation was more increased when wearing the colored lens than achromatic. Positive relative accommodation increased when wearing the blue color lens density by 50%. Also, accommodation facility increased when wearing the colored lens, but, as the density of the color increased, the accommodation facility was decreased. Conclusion : As since the accommodation function changes according to density of the colored lenses, working distance and environment of the wearing colored lens should be considered when selecting density and color of colored lenses.

• Journal of radiological science and technology
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• v.31 no.1
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• pp.61-69
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• 2008

Diagnosis of breast ultrasound is better than mammography in the early detection of breast cancer, but, it is difficult to detect microcalcification. We studied on detection for calcification of breast tissue using acoustic resonance and power doppler with 7.5 MHz linear probe in breast ultrasound. We first constructed breast tissue phantom made of gelatin and saw breast, and then observed calcification by the change of external vibration. Calcification injected breast tissue phantom visualized the difference for brightness and region of color in ROI regions of power doppler. Acoustic resonance almost never visualized in low frequency regions, plateau constituted in about 300-400 Hz and colors vanished according to the increase of frequency.

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.10
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• pp.579-585
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• 2003

Recently most of 3D graphics rendering Processors have the pixel cache storing depth data and color data to reduce the memory latency and the bandwidth requirement. In this paper, we propose the effective pixel cache for improving the performance of a rendering processor. The proposed cache system stores the depth data selectively based on the result of Z-test and the color data are stored into the auxiliary buffer. Simulation results show that the 16Kbyte proposed cache system provides better performance than the 32Kbyte conventional cache.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.37-38
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• 2009

터치스크린 기능이 있는 LCD 패널이 부착된 임베디드 시스템의 경우, 사용자 입력 명령의 전달을 위해 사각형, 오각형, 원, 화살표 같은 다양한 도형들이 자주 사용된다. 이 경우, 특정 명령 입력 여부의 판단을 위해 터치된 지점이 그 명령을 의미하는 도형 내에 있는지의 여부를 판단하는 알고리즘이 필요하다. 그러나 이런 알고리즘들은 제한된 컴퓨팅 자원을 갖는 임베디드 시스템의 경우 상당한 오버헤드를 유발 할 수 있다. 본 논문은 도형 영역의 터치 여부의 판단을 위해 사용 되고 있는 사각형의 범위 검사법, 다각형의 교차 수(crossing number) 검사법, 원의 거리 측정법, 그리고 이런 모든 도형들에 적용 가능한 색상 비교법을 구현하고, 성능 평가를 위해 각 방법에 따라 사각형, 오각형, 원, 그림 같은 도형들의 영역 터치 여부를 판단하는데 걸리는 시간을 측정한다. 이 측정 결과, 사각형은 범위 검사법이, 원은 거리 측정법이, 다각형 및 그림을 이용한 도형일 경우에는 색상 비교법이 가장 적합한 것으로 나타났다.

• Journal of the Korean Society for Nondestructive Testing
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• v.27 no.5
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• pp.432-441
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• 2007

Image processing methods for an extraction of a nuclear fuel rod image and visualization methods of the RGB color data were studied with a sectional image of spent fuel assembly. The fuel rod images could be extracted by using a histogram analysis, an edge detection and RGB rotor data. In these results, a size of the spent fuel assembly could be measured by using a histogram analysis method and a shape of the spent fuel rod could be observed by using an edge detection method. Finally, a various analyses were established for status of the spent fuel assembly by realized various 3D images for the color data in an image of a spent fuel assembly.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.238-240
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• 2001

원자력발전소에서는 기기, 배관 및 각종 지지구조물 등 설비에 대하여 시간의 경과에 따른 취약화 정도를 측정하기 위하여 대략 15개월을 주기로 호기별 비파괴검사로 감시 및 평가하는 가동중검사를 실시한다. 증기발생기, 주복수기와 같은 세관으로 구성된 설비는 와전류탐상검사를 수행하여 신호데이터를 취득하고 건전성 여부를 평가한 다음 그 결과를 Optical Disk에 신호데이터와 함께 저장한다. 본 논문에서는 저장된 방대한 양의 검사 결과 파일을 추출하여 데이터베이스로 구축하고, 행열 수량, 모양, 방향 및 열번호 부여방법이 상이한 다양한 배열 형태의 세관 Map을 편집하여 사용자 요구에 따라 검사정보를 색상 Tube로 Mapping 처리하여 세관의 상태, 검사이력, 결함성장률 및 변화추이 분석을 시각적으로 파악할 수 프로그램 구현 사례를 소개한다.

• Journal of Preventive Medicine and Public Health
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• v.29 no.3 s.54
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• pp.529-538
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• 1996

We investigated the occurrence of color vision loss in 70 organic solvent mixtures exposed workers and in 47 controls. Color Vision was assessed with a color arrangement test designed to identify the defective color sense, the Han Double 15-Hue Test. The results of the test were no significant difference between exposed workers and controls in the proportion of subjects who committed one or two errors. Quantitative analysis, using color confusion index(CCI), showed no signicant difference between exposed workers and controls. A significant linear correlation was present between age and CCI in both exposed workers (CCI=0.0056age + 0.94; r=0.23; p<0.05) and controls(CCI=0.0066age + 0.86; r=0.33; p<0.05). Qualitative analysis of the patterns on the hue circle showed that the prevalence of acquired dyschromatopsia was 21% in both and no significant difference. Multiple regression analyses showed that age was significantly related to color vision loss. These results did not provide evidence of a relationship between organic solvents exposure and incidence of color vision loss. In field studies for monitor the people at risk of the acquired color vision loss involving low-dose organic solvents exposed workers, both quantitative and qualitative information should be considered.

• Culinary science and hospitality research
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• v.5 no.2
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• pp.115-130
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• 1999

Preservative effects of natural preservatives, citric acid and salt on chopped garlic were investigated. Citric acid was very effective for the repression of bacteria multiplying and browning of chopped garlic in 0.5%~1% concentration. Salt had an effect on the repression of bacteria multiplying and browning color of chopped garlic except for 1% NaCl. Synergy effect between citric acid and NaCl was also very good for the decreasing of bacteria multiplying and the maintaining of Hunter color of chopped garlic. Compounded effect among the GF, CA and ascorbic acid was somewhat proper in the sensory evaluation of chopped garlic. And the sensory evaluation score was best in chopping size 3mm(diameter) of chopped garlic and viscosity 4500cp. of chopped garlic.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.10a
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• pp.147-147
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• 2003

홍국 추출물로서 기능성을 조사하고 홍국 첨가한 국수를 제조하기 위하여 관능검사를 통하여 적정제조조건을 설정한 후 국수를 제조하여 품질특성을 조사하였다. 홍국을 물과 70%에탄올로 추출한 후 항산화작용과 아질산염소거능을 조사하였다. 홍국 추출물의 전자공여능은 물추출물 500ppm에서 46%, 1,000ppm에서 49%의 전자공여능을 나타내었으나 에탄올추출물은 500ppm에서 51%, 1,000ppm에서 56%로서 물추출물보다 높은 전자공여능을 나타내었다. 홍국 추출물의 아질산염소거능은 물추출 1,000ppm pH 1.2에서 32% 정도의 소거능을 나타내었으며 에탄올추출물 1,000ppm은 pH 1.2에서 37%의 아질산염소거능을 나타내었다. 홍국 추출물의 황산화능과 아질산염소거능 모두 에탄올추출물이 물추출물보다 우수하였다. 홍국을 0~4% 첨가한 홍국국수의 관능검사에서 건면에 대하여 색, 향, 맛, 뒷맛, 총괄평가 등을 7점법으로 관능검사를 실시한 결과, 색상은 홍국 4% 첨가한 것을 가장 선호하였으며(p＜0.05) 향, 맛, 뒷맛은 각 첨가군간에 유의적 차이가 없었다. 건면에 대한 총괄평가는 3%와 4% 첨가한 국수를 가장 선호하였다(p＜0.05). 한편 삶은 홍국국수에 대한 관능검사를 실시한 결과에서, 색상은 4% 첨가국수를 가장 선호하였으나(p<0.05) 향, 부드러움, 맛, 뒷맛은 홍국 첨가농도간에 유의적 차이를 나타내지 않았다. 촉촉한 정도는 4%에서 유의적으로 기호도가 높았으며(p<0.05) 총괄평가는 각 농도의 홍국 첨가군 간에 유의적 차이를 나타내지 않았다. 건면과 생면의 관능검사 결과를 종합해 볼 때, 홍국국수의 제조시에 홍국을 3~4% 첨가하는 것이 가장 바람직한 것으로 판단된다. 홍국국수(생면)를 5$^{\circ}C$에 4주간 저장했을 때의 균수는 저장 2주까지는 생균수가 증가하였으나 2주후부터 감소하는 경향을 나타내었다. 저장초기의 균수는 홍국을 첨가한 국수가 대조구에 비하여 총균수와 효모.곰팡이수가 많았으나 저장 1주일 후부터 3주까지 홍국 첨가구가 대조구에 비하여 균수가 적었으며 홍국 첨가농도에 비례하여 감소하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.5
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• pp.579-586
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• 2015

In this paper, we design and implement a lighting system which has a capability of adjusting brightness and colors of LED module. The lighting systems is consisted of RGB and white LEDs controlled by a micro-processor. All colors in nature can be synthesized in our lighting system by controlling brightness of 4 color LEDs individually. The current flowing to LED is limited to a maximum set value to extend the LED life time using PWM current control. The control module also includes the function that it can save and load brightness and color data set by the user. The implemented lighting system passed the electromagnetic compatibility(EMC) test such that it can be used as a commercial product.