Kubelka-Munk이론에 기반한 사염직물의 최적화된 구조 -색채모델링

채영주 한국의류학회 2018 한국의류학회지 Vol.42 No.3

In this research, the three-dimensional structural and colorimetrical modeling of yarn-dyed woven fabrics was conducted based on the Kubelka-Munk theory (K-M theory) for their accurate color predictions. In the K-M theory for textile color formulation, the absorption and scattering coefficients, denoted K and S, respectively, of a colored fabric are represented using those of the individual colorants or color components used. One-hundred forty woven fabric samples were produced in a wide range of structures and colors using red, yellow, green, and blue yarns. Through the optimization of previous two-dimensional color prediction models by considering the key three-dimensional structural parameters of woven fabrics, three three-dimensional K/S-based color prediction models, that is, linear K/S, linear log K/S, and exponential K/S models, were developed. To evaluate the performance of the three-dimensional color prediction models, the color differences, ΔL*, ΔC*, Δho, and ΔECMC(2:1), between the predicted and the measured colors of the samples were calculated as error values and then compared with those of previous two-dimensional models. As a result, three-dimensional models have proved to be of substantially higher predictive accuracy than twodimensional models in all lightness, chroma, and hue predictions with much lower ΔL*, ΔC*, Δho, and the resultant ΔECMC(2:1) values.

인공구조물 동종골 복합체를 이용한 주관절 인공관절 재치환술: 환자군 연구 및 수술기법

채영주,공현식 대한수부외과학회 2020 대한수부외과학회지 Vol.25 No.2

Purpose: The purpose of this study was to report the results of revision total elbow replacement arthroplasty (TERA) with an allograft-prosthesis composite (APC). Methods: We retrospectively reviewed 6 patients with an average age of 75 years who had undergone revision TERA with an APC for periprosthetic fracture or loosening of the component. The mean follow-up period was 13 months. We assessed serial radiographs for bone union and evaluated the outcomes in terms of pain visual analogue scale (VAS), the Mayo Elbow Performance Score (MEPS), range of motion, and complications. Results: The APC was used for the humerus in 5 patients and for the ulna in 1 patient. The clinical bone union was achieved at average 9 months after surgery. The mean pain VAS score improved from 6.8 to 1.7, the mean elbow joint range of motion increased from 95° to 129° and the MEPS score improved from 40 to 79 at the last follow-up. There were no major complications such as infection, nonunion, malunion, limitation of motion or refracture. One patient experienced transient radial nerve palsy and another patient a prominent edge of the humeral allobone that needed a trimming surgery later. Conclusion: Revision TERA with an APC provides good functional outcomes and can be recommended as one of the options for failed total elbow arthroplasty. 목적: 인공구조물 동종골 복합체를 이용한 주관절 인공관절 재치환술에 대한 수술적 치료 결과를 알아보고자 한다. 방법: 주관절의 인공관절 전치환술을 받은 후 발생한 인공관절주위골절, 인공구조물 해리 등으로 인공구조물 동종골 복합체를 이용한 재치환술을 받은 6명의 환자들을 후향적으로 연구하였다. 평균 연령은 75세, 평균 추시 기간은 13개월이었다. 수술 후 단순방사선 검사를 통해 골유합 시기를 확인하였고, 임상적으로는 시각통증척도, MEPS 점수, 관절운동 범위 및 합병증 발생여부를 조사하였다. 결과: 수술 환자들 중 상완골 재건은 5명, 척골 재건은 1명이었다. 평균 골유합 소요 기간은 9개월이었다. 수술 전후 평균 시각 통증 척도는 6.8에서 1.7로 호전을 보였고, 주관절의 평균 능동 운동 범위는 95˚에서 129˚, 그리고 평균 MEPS 점수는 40에서 79로 주관절 기능이 회복되었다. 감염, 부정유합, 불유합, 운동제한 및 재골절을 포함한 합병증은 관찰되지 않았다. 1명 환자에서 수술 후 요골신경 이상을 호소하였고, 다른 1예에서 동종골의 돌출로 인한 압통을 호소하였다. 결론: 인공구조물 동종골 복합체를 이용한 주관절의 인공관절 재치환술은 주관절의 기능회복에 효과적이며 재치환술시 고려해 볼 수 있는 수술법의 하나로 추천한다.

당당한 연출법/노동법 사례 92 - 사직 예고

채영주,박희선 샘터사 1994 월간 샘터 Vol.25 No.6

광원에 따른 텍스타일의 Color Appearance 수치 예측 방법

채영주 한국의류학회 2020 한국의류학회지 Vol.44 No.1

This study suggests a method to predict the color appearance of textiles that shifts depending on illumination variations. The suggested method allows the calculations of lightness, chroma, and hue appearance values from the spectral reflectance values of the textile and illuminant. The accuracy of the method was evaluated through numerical and statistical comparisons between the predicted and the measured color appearance values of 24 fabric samples under CIE standard illuminant D65. As a result, there were excellent agreements between the two data sets with the error values close to zero. The predicted color appearance values of 24 samples under two illuminating (color temperature-luminance) conditions, 2700 K-100 cd/m2 and 6500 K-100 cd/m2, were then compared to prove the significant effect of illumination on the color appearance of textiles. The color appearance values were also compared with spectrophotometrically measured physical color attributes, that is, true colors of the samples. The physical color attributes of samples were unchanged; however, differences in color appearance under different conditions were generally much larger than the suprathreshold color difference tolerances discussed in the color science literature. Finally, the magnitude of the illumination effect depending on the physical color attributes of samples was also analyzed.

시판 생수의 성분에 관한 조사

채영주,오수경,박성배 한국환경보건학회 1989 한국환경보건학회지 Vol.15 No.1

In order for analysis of the actual condition of commercial life water, 38 samples were investigated during March to December in 1988. The results were as follows 1. All the samples analyzed were suitable for physico chemical criteria drinking water. The mean value of NH$_{3}$-N, NO$_{3}$-N, and KMnO$_{4}$ ,consumption were 0.014, 1.232 and 0.794 respectively. 2. General bacterial counts was detected higher than standard limit by 31.6% of total samples and the positive rate of coliform was 2.6% of total samples.

가을, 그 반갑지 않은 재회

채영주 문예운동사 2016 수필시대 Vol.11 No.9·10

동경심과 두려움의 공존

채영주 문예운동사 2018 수필시대 Vol.13 No.겨울

Color Inconstancy of Chromatic and Achromatic Textile Fabrics with Changes in the Correlated Color Temperature and Luminance of the Light Source

채영주,이은주 한국섬유공학회 2021 Fibers and polymers Vol.22 No.10

This study quantitatively analyzed how the color appearance of textile fabrics of varying lightness, chroma, andhue changes under a broad spectrum of illumination conditions. The color appearances of 203 chromatic (R, YR, Y, GY, G,BG, B, and RB) and achromatic fabrics were measured spectroradiometrically under 16 light sources with different correlatedcolor temperatures (2700, 4000, 5000, and 6500 K) and luminances (50, 100, 500, and 1000 cd/m2). The color appearancevalues were compared with the spectrophotometrically measured physical color values of the fabrics, which were regarded astheir true colors. The differences ranged up to 12.45 |ΔL*10|, 19.32 |ΔC*ab,10|, 161.83 |Δhab,10|, and 16.70 ΔECMC(2:1) units, whichwere significantly higher than the color discrimination thresholds of the human eye. Among 9 hue groups of fabrics, the colorappearances of BG (bluish-green) fabrics were generally most affected by light sources, while those of achromatic fabricswere least affected with mean ΔECMC(2:1) of 6.32 and 1.03, respectively. It was also found that the correlated color temperatureof light sources significantly affected all the lightness, colorfulness, and hue of fabrics, and the different trends of these effectswere observed for different hue groups. Unlike current knowledge, light sources with a correlated color temperature of6500 K did not always produce color appearances that most closely resemble the actual physical colors. Meanwhile, theluminance of light sources did not have a profound effect on the color appearances of fabrics.

잘라내야 할 시기

채영주 문예운동사 2016 문예운동 Vol.- No.129

그녀가 떠난 자리

채영주 문예운동사 2015 수필시대 Vol.10 No.-