• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.741-744
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• 2000

The removal of colours from aqueous solution and/or dispersions has been studied by dispersed-air flotation, in a semi-batch column. Two colours were used for the experiments: Basic Yellow 28 (basic) and Direct Orange 31 (basic). All two were effectively removed by flotation within 8 min. Sodium dodecyl sulfate, sodium oleate and amines were found to be effective as collectors in the removal of colour, which was found to be related to the pH of the solution and the amount of collector added to it, with high collector dosages causing the process to become pH-independent.

• Applied Chemistry for Engineering
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• v.10 no.4
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• pp.576-580
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• 1999

The removal of colours from aqueous solution and/or dispersions has been studied by dispersed-air flotation, in a semi-batch column. Two colours were used for the experiments: Basic Yellow 28(basic) and Direct Orange 31(basic). All two effectively removed by flotation within 8 min. Sodium dodecyl sulfate, sodium oleate and amines were found to be effective as collectors in the removal of colour, which was found to be related to the pH of the solution and the amount of collector added to it, with high collector dosages causing the process to become pH-independent.

• The International Journal of Costume Culture
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• v.13 no.1
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• pp.1-4
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• 2010

The hand printed cottons of India are historically world-renowned for their rich fast colours, elaborate designs, and matchless quality. Until the discovery of synthetic dyestuffs in the latter part of the nineteenth century, the unsurpassed master dyers of cotton were the craftsmen of India-birthplace of cultivated cotton. The Indian printers and dyers monopolised this arcane art of permeating cotton cloth with richly hued, colour-fast designs, and the fruits of their labour proved hugely influential in international trade and the development of modern textile technologies. This paper focuses on a lesser-known body of hand printed cottons, traditionally produced in rural Rajasthan for everyday use by the local pastoral communities. Drawing on extensive research carried out with the region's Chhipa community of hereditary cloth printers, the complex and multiple applications of mordant, dye and resist are illustrated. Often taking months to complete, the enduring popularity of these labour-intensive hand printed cottons is then discussed, particularly in the light of the hugesocial importance borne by cloth in Rajasthan. Cloth and clothing are widely recognised as indicators of social status, gender, rank, and individual and group affiliations. In addition, cloth and clothing have been established as indicators of social, economic, political and technological change. The paper concludes by drawing attention to the recent influx of machine-printed polyester textiles, often replicating the designs or colours of the traditional locally produced cottons. Thus women of the region, whilst using these modern synthetic textiles as part of newer ways of expressing their identity, also visibly retain the values associated with hand printed cottons and traditional dress codes.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.43-53
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• 2016

In this study, under the assumption that there may be differences in colour attributes that can be perceived according to the brightness of the background and the size of the colour stimulus, a test was conducted where colour matching was done for stimulus sizes of $10^{\circ}$ and $20^{\circ}$ in terms of peripheral vision by varying the background brightness. The test results showed that depending on the background brightness and the specific combinations of the Munsell colour attributes used as the test stimulus, colours can be perceived differently even if they are the same colours. In addition, in contrast to findings from previous studies on colour perception according to the stimulus size, it was found that even if the size of the colour stimulus is relatively small, colours can be perceived more colourfully or more brightly with changes in the background brightness. Based on the findings of this study, degradation in image quality can be improved, which may occur when the size of the input image is changed at a later time, and also, contributions can be made when it comes to the reproduction of effective sold three-dimensional structures that reflect visual qualities when processing 3D holographic imagery, in addition to 2D imagery.

• Korean Journal of Food Science and Technology
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• v.31 no.1
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• pp.30-35
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• 1999

A simple, rapid, efficient method is for extraction of 13 synthetic water-soluble food colours (Tartrazine, Amarnth, Indigo carmine, New coccine, Sunset yellow FCF, Allura red AC, Eosine, Fast Green FCF, Brilliant Blue FCF, Erythrosine, Acid red, phloxine, Rose Bengal) by polyamide resin and for their quantitative by high performance liquid chromatography (HPLC). Colours (coal-tar dyes) were extracted with polyamide resin and then determinated by HPLC. The HPLC conditions using a reverse phase partition type column $(Nova-pak\;C_{18})$, photodiode array (PDA) detector and 1% Ammonium acetate / 60% acetonitrile in water as eluent, were acceptable for various kinds of colorants. By the use of the proposed method, a survey of coal-tar dyes was carried out on 20 samples and that were detected $4.76{\sim}133.47\;ppm$.

• Proceedings of the KIEE Conference
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• 2009.04a
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• pp.3-5
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• 2009

A study has the status of a basic safety publication in accordance with the principles given in IEC Guide 104 and ISO/IEC Guide 51. Provides general rules for the use of certain colours or numerals to identify conductors with the aim of avoiding ambiguity and ensuring safe operation.

• Journal of applied mathematics & informatics
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• v.5 no.1
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• pp.13-22
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• 1998

Fractals which represent many of the sets in various scien-tific fields as well as in nature is geometrically too complicate. Then we usually use Hausdorff dimension to estimate their geometrical proper-ties. But to explain the fractals from the hausdorff dimension induced by the Euclidan metric are not too sufficient. For example in digi-tal communication while encoding or decoding the fractal images we must consider not only their geometric sizes but also many other fac-tors such as colours densities and energies etc. So in this paper we define the dimension matrix of the sets by redefining the new metric.

• Journal of Biomedical Engineering Research
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• v.9 no.1
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• pp.135-138
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• 1988

In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality.

• 보존과학연구
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• s.13
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• pp.59-68
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• 1992

Some pigments of Kumsansa mural painting and Dan-Chong were analyzed by X-ray diffraction spectrometry. Red colour of mural painting and Dan-Chong are all of hematite based quartz and calcite. White blue were found to lead sulphate based calcite on mural painting. Blue pigment on mural painting was found to be quartz, albite, calcite, gypsum and talcwhile Dan-Chong lazurite and gypsum.* Dan-Chong : Exterior painrig with various colours and desingns.

• Advances in materials Research
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• v.3 no.4
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• pp.227-232
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• 2014

$Ce^{4+}$, $Eu^{3+}$, $Tb^{3+}$ co-doped $Ca_3Si_3O_8F_2$ phosphor was synthesized via solid state reaction method using $CaF_2$, $CaCO_3$ and $SiO_2$ as raw materials for the host and $Eu_2O_3$, $CeO_2$, and $Tb_4O_7$ as activators. The luminescent properties of the phosphor was analysed by spectrofluorophotometer at room temperature. The effect of excitation wavelengths on the luminescent properties of the phosphor i.e. under near-ultraviolet (nUV) and visible excitations was investigated. The emission peaks of $Ce^{4+}$, $Eu^{3+}$, $Tb^{3+}$ co-doped $Ca_3Si_3O_8F_2$ phosphor lays at 480(blue band), 550(green band) and 611nm (red band) under 380nm excitation wavelength, attributed to the $Ce^{4+}$ ion, $Tb^{3+}$ ion and $Eu^{3+}$ ions respectively. The results reveal that the phosphor emits white light upon nUV (380nm) / visible (465nm) illumination, and a red light upon 395nm / 535nm illumination. RE ions doped $Ca_3Si_3O_8F_2$ is a promising white light phosphor for LEDs. The emission colours can be seen using Commission international de l'eclairage (CIE) co-ordinates. A single host phosphor emitting different colours under different excitations indicates that it is a potential phosphor having applications in many fields.