• 한국식품영양학회지
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• 제33권1호
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• pp.17-26
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• 2020

This study was conducted to evaluate the functionality of fermented black garlic extracts under various conditions. Black garlic powder was prepared by aging for 0~72 hours at 80℃ depending on relative humidity (RH). It showed the highest antioxidant effects among the samples; the total antioxidant activity of black garlic powders at RH 75%, 84%, and 90% for 72 hours was increased 31.9 times, 28.2 times, and 22.6 times compared with that of the fresh garlic powder, respectively. Also, the alliin content was gradually decreased. S-ally-L-cysteine and S-ethyl-cysteine levels were increased; the highest values were 495.9 ㎍/g and 1,769.7 ㎍/g after aging for 72 hours at RH 75%. Aspartate transaminase (AST) and alanine transaminase (ALT) levels were increased following high fat diet feeding, but the rise was obviously reduced by administration of black garlic extract. The total cholesterol, LDL/VLDL-cholesterol, and triglyceride contents in serum were significantly lower in methionine and choline deficient (MCD) diet treatment groups than in the positive control group. The concentration was increased following the intake of black garlic and fermented black garlic extracts. Therefore, black garlic extracts could be an ideal material as a dietary supplement in healthy functional foods to improve the effects on fatty liver.

• 한국컴퓨터그래픽스학회논문지
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• 제15권2호
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• pp.19-34
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• 2009

이 논문에서는 삼차원 메쉬를 이용한 자동화된 수묵화 렌더링 시스템을 소개한다. 먼저 수묵화의 특징을 분석하고 이를 바탕으로 수묵화 렌더링 시스템을 위한 요구사항을 제시한다. 또한 수묵화를 그릴 때 사용되는 중요한 단계들을 살펴본다. 이러한 분석에 기반하여 본 논문에서 제시하는 시스템은 다음과 같은 세 가지 레이어로 나누어진다: 중요선 레이어, 내부 칠하기 레이어 미디어 레이어. 본 논문의 가장 큰 특징은 사실적인 이미지 생성과 실시간 렌더링이라는 두 가지 요구사항을 모두 만족시킬 수 있는 새로운 방법을 제시한다는 점이다. 이 시스템은 몰골법, 백묘법, 구륵법 등 수묵화의 대표적인 세 가지 스타일을 쉽게 생성할 수 있다. 본 논문의 연구 결과는 컴퓨터 게임과 가상 환경 등 실시간 특성이 중요한 요소가 되는 어플리케이션에 바로 적용될 수 있을 것으로 예상된다.

• Ocean and Polar Research
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• 제42권1호
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• pp.63-76
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• 2020

This study sought to assess the stock status and analyze the management effects with regard to the Black scraper, which is one of the more commercially important species in Korea. The catch amounts of Black scraper have significantly decreased since 1991. In this analysis, a Bayesian state-space model was utilized to assess the biomass of the Black scraper given the limited data. Model results showed that MSY and B_MSY of Black scraper were estimated to be 26,587 tons and 365,200 tons, respectively. In addition, the current biomass level of the Black scraper was assessed to be only 2.1% (7,549 tons) of B_MSY. For this reason, the effects of a moratorium policy on the Black scraper were evaluated. The results showed that if such a moratorium policy was implemented, it would take at least 18-40 years to restore the biomass level of the Black scraper to B_MSY depending upon its growth rates.

• 한국정보통신학회논문지
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• 제25권12호
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• pp.1835-1845
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• 2021

본 논문에서는 블랙 아이스를 정확하게 인식하고 도로 노면 정보를 운전자에게 미리 알려줘서 속도를 제어하고 예방 조치를 취할 수 있도록 하기 위해 열화 도로 영상을 기반으로 블랙 아이스 검출하기 위해 lightweight 네트워크를 제안한다. 전이학습을 이용하여 블랙 아이스 인식 실험을 하였고, 블랙 아이스 인식의 정확도 향상을 위해 MobileNetV2 기반의 개선된 lightweight 네트워크를 개발하였다. 계산량을 줄이기 위해 Linear Bottleneck 및 Inverted Residuals를 활용하여 4개의 Bottleneck 그룹을 사용하고 모델의 인식률 향상을 위해 각 Bottleneck 그룹에 3×3 컨볼루션 레이어를 연결하여 지역적 특징 추출을 강화하고 특징 맵의 수를 늘렸다. 마지막으로 구축된 블랙 아이스 데이터 세트 대상으로 블랙 아이스 인식 실험을 진행하였으며, 제안된 모델은 블랙 아이스에 대해 99.07%의 정확한 인식률을 나타내었다.

• 한국식품조리과학회지
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• 제33권2호
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• pp.127-136
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• 2017

Purpose: This study examined the effect of different gluten-free flours on the properties of cookies. Methods: Each gluten-free cookie was made from wheat, brown rice, buckwheat, corn, sorghum, teff, or black rice. Results: Baking loss was highest on sorghum (18.85%) and the lowest on teff (12.73%). The spread factor was highest on brown rice (8.20) and lowest on corn (7.60). The density was similar in all samples (1 g/mL). pH was the highest on buckwheat (6.45) and lowest on wheat (5.96). While L-value, a-value and b-value were lowest on black rice, the ${\Delta}E-value$ was the highest on black rice (35.57). The hardness was highest on wheat (30.28 N) and lowest on teff (14.87 N). The polyphenol and flavonoid content was the highest on buckwheat ($25.97{\mu}g\;GAE/mg$) and the flavonoid content was the highest on black rice ($24.33{\mu}g\;QE/mg$). The DPPH IC50 value was highest on wheat ($352.41{\mu}g/mL$) and lowest on black rice ($33.59{\mu}g/mL$). The ABTS $IC_{50}$ value was highest on wheat ($349.30{\mu}g/mL$) and lowest on black rice ($57.72{\mu}g/mL$). The results of the sensory properties revealed color to be highest on corn (7.33). The top grain was similar in all the samples (5.43-6.57). Flavor was highest on black rice and teff (6.43-6.48). The softness was the highest on wheat, sorghum, teff, and black rice (6.48-7.05). Sweetness was highest on sorghum, teff, and black rice (6.19-6.71). The overall preference also was highest on sorghum, teff, and black rice (6.14-6.48). Conclusion: Gluten-free flours can improve the quality characteristics and antioxidant activities of cookies.

• 한국축산식품학회지
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• 제28권1호
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• pp.63-68
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• 2008

본 연구에서는 근적외선 분광광도계를 이용하여 원유의 체세포수 측정에 필요한 최적의 색소를 선정하기 위하여 eosin-Y, methyl red, methylen blue, resazurin 및 amido black 10B등의 5가지 색소를 0.01%첨가 후 근적외선 분광광도계를 이용하여 400-2,500 nm 영역에서 측청하였으며, PLS(partial least squar)분석 결과는 다음과 같다. 교정부 모델에서의 상관도는 raw milk 0.78, eosin-Y 0.65, methyl red 0.63, methylen blue 0.65, resazurin 0.98 그리고 amido black 10B는 0.99 였다. 또한, 검증부 모델에서의 상관도는 raw milk 0.49, eosin-Y 0.21, methyl red 0.36, methylen blue 0.47, resazurin 0.95 그리고 amido black 10B는 0.98 였다. 위 결과를 종합해 보면, amido black 10B를 첨가한 경우 검증부 모델의 상관도는 0.98, 검증부 오차(SEP)는 0.09로 가장 우수한 결과를 보였다.

• 복식
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• 제62권1호
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• pp.29-48
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• 2012

From ancient to modern days, Koreans have preferred and even worshiped white clothes to the extent that they are called "the white-clad race", and the color black has seldom been used for women's clothes. In western countries too, it was only after Chanel that black color came to represent feminine beauty. Black clothes were introduced in Korea after the opening of its ports to foreign countries in 1876 and have mainly been worn as a practical clolor for winter coats and school uniforms. The traditional preference for white and other bright colors continued well into the 1980s. However, the industrialization and urbanization caused by economic development and the influx of western cultures and ideas in the 1980s brought about the westernization of Korean aesthetic consciousness and resulted in the phenomenon of modern Korean women's preference for black fashion that became conspicuous from 1991. With the introduction of western fashion after the opening of the country in 1876, the spiritual values contained in preference for white clothes have been substituted by materialistic values as people accepted the practical beauty of black fashion, and the inclination toward intrinsic natural beauty intrinsic in the aesthetic senses that preferred white clothes has been replaced by the preference for modern, elegant and sensual beauties of black fashion whose preference has begun in the 1990s.

• 한국재료학회지
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• 제21권9호
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• pp.477-481
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• 2011

Composites of insulating polyethylene and carbon black are widely used in switching elements, conductive paint, and other applications due to the large gap of resistance value. This research addresses the critical exponent of dielectric breakdown strength of polymer matrix composites (PMC) made with carbon black and polyethylene below the percolation threshold (Pt) for the first time. Here, Pt means the volume fraction of carbon black of which the resistance of the PMC is transferred from its sharp decrease to gradual decrease in accordance with the increase of carbon-black-filled content. First, the Pt is determined based on the critical exponents of resistivity and relative permittivity. Although huge cohesive bodies of carbon black are formed in case of being less than the Pt, a percolation path connecting the conducting phases is not formed. The dielectric breakdown strength (Dbs) of the PMC below Pt is measured by using an impulse voltage in the range from 10 kV to 40 kV to avoid the effect of joule heating. Although the observed Dbs data seems to be well fitted to a straight line with a slope of 0.9 on a double logarithm of (Pt-$V_{CB}$) and Dbs, the least squares method gives a slope of 0.97 for the PMC. It has been found that finite carbon-black clusters play an important role in dielectric breakdown.

• 한국재료학회지
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• 제19권12호
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• pp.644-648
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• 2009

Temperature dependency of resistivity of the carbon black-polyethylene composites below and above percolation threshold is studied based on the electrical conduction mechanism. Temperature coefficient of resistance of the composites below percolation threshold changed from minus to plus, increasing volume fraction of carbon black; this trend decreased with increasing volume fraction of carbon black. The temperature dependence of resistivity of the composites below percolation threshold can be explained with a tunneling conduction model by incorporating the effect of thermal expansion of the composites into a tunneling gap. Temperature coefficient of resistance of the composites above percolation threshold was positive and its absolute value increased with increasing volume fraction of carbon black. By assuming that the electrical conduction through percolating paths is a thermally activated process and by incorporating the effect of thermal expansion into the volume fraction of carbon black, the temperature dependency of the resistivity above percolation threshold has been well explained without violating the universal law of conductivity. The apparent activation energy is estimated to be 0.14 eV.

• Toxicological Research
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• 제27권3호
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• pp.161-166
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• 2011

Carbon black, a particulate form of pure elemental carbon, is an industrial chemical with the high potential of occupational exposure. Although the relationship between exposure to particulate matters (PM) and cardiovascular diseases is well established, the cardiovascular risk of carbon black has not been characterized clearly. In this study, the cytotoxicity of carbon black to vascular smooth muscle and endothelial cells were examined to investigate the potential vascular toxicity of carbon black. Carbon black with distinct particle size, N330 (primary size, 28~36 nm) and N990 (250~350 nm) were treated to A-10, rat aortic smooth muscle cells and human umbilical vein endothelial cell line, ECV304, and cell viability was assessed by lactate dehydrogenase (LDH) leakage assay. Treatment of carbon black N990 resulted in the significant reduction of viability in A-10 cells at 100 ${\mu}g$/ml, the highest concentration tested, while N330 failed to cause cell death. Cytotoxicity to ECV304 cells was induced only by N330 at higher concentration, 200 ${\mu}g$/ml, suggesting that ECV304 cells were relatively resistant to carbon black. Treatment of 100 ${\mu}g$/ml N990 led to the elevation of reactive oxygen species (ROS) detected by dichlorodihydrofluorescein (DCF) in A-10 cells. Pretreatment of antioxidants, N-acetylcysteine (NAC) and sulforaphane restored decreased viability of N990-treated A-10 cells, and N-acetylcysteine, but not sulforaphane, attenuated N990-induced ROS generation in A-10 cells. Taken together, present study shows that carbon black is cytotoxic to vascular cells, and the generation of reactive oxygen contributes to the development of cytotoxicity. ROS scavenging antioxidant could be a potential strategy to attenuate the toxicity induced by carbon black exposure.