Results 271 to 280 of about 161,509 (311)

The structure of hereditary properties and 2-coloured multigraphs

Combinatorica, 2011
A graph property \(P\) is a class of graphs closed under isomorphism; it is hereditary if it is closed under the taking of induced subgraphs. It is customary to say that graphs in the class \(P\) ``have the property \(P\)''. \textit{B. Bollobás} and \textit{A. Thomason} [Combinatorica 20, No.
Edward Marchant, Andrew Thomason 0001
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METRICS INDICATING PROPERTIES OF LIGHT COLOUR AND SUBJECTIVE EVALUATION OF COLOUR APPEARANCE

CIE x050:2023 Proceedings of the 30th Session of the CIE, Ljubljana, Slovenia, September 15 – 23, 2023, Volume 1, 2023
In order to identify the relationship between the metrics indicating properties of light colour and subjective evaluation of colour appearance, field measurements and subjective experiments are carried out. It was shown that there are cases where general colour rendering index (Ra) is low and the Relative Gamut Area Index (Ga) is high. For RGBLED, duv
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Colour rendering properties of light sources: New colour space for evaluation

Lighting Research and Technology, 1996
A new colour space NC-IIIC, which is synthesized by nonlinear transformations of the tristimulus values X, Y and Z with nonlinear R-G and Y-B opponent colour response functions k1 and k2, is developed with proper correspondence to the physiological mechanisms of the visual system. This space can specify hue, lightness and chroma independently.
K. Ikeda, H. Yamashina, A. Ichihashi
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Optical properties, colour and turbidity

1979
Insolation of the lake area varies little in consecutive years (Table 15.1) and is usually higher than in other parts of Austria (Chapter 5). The maximum Open image in new window deviation from the average of this region was five per cent during the period 1967 to 1973.
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Spatial and temporal properties of infant colour vision

1996
AbstractInformation processing for colour vision starts in the retinal photoreceptors and proceeds through the inner retina, the lateral geniculate nucleus, and visual cortex. At the photoreceptor level, the spectral composition of light is analysed with three cone types with different absorption spectra.
Burr D., MORRONE, MARIA CONCETTA, Fiorentini A.   +2 more
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Colour-Rendering Tolerances and the Colour-Rendering Properties of Light Sources

Transactions of the Illuminating Engineering Society, 1963
Good colour-rendering is defined relative to total radiator standards, and the problem of the determination of practical tolerances is outlined. Experiments are described from which a series of six spectral bands was derived, which could be used to determine colour-rendering tolerances and to classify the colour-rendering properties of a light source ...
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Measurement, Representation and Specification of Colour and Colour Rendering Properties of Light Sources

Transactions of the Illuminating Engineering Society, 1951
The problem is stated and is followed by a description of methods of measuring and specifying colour and colour rendering properties, with particular reference to tubular fluorescent lamps. It has been found desirable in Great Britain to specify the colour characteristics of these light sources in terms of both their colour rendering ...
G. T. Winch, H. R. Ruff
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Colour and the Optical Properties of Materials

2010
Preface. 1 Light and Colour. 1.1 Colour and light. 1.2 Colour and energy. 1.3 Light waves. 1.4 Interference. 1.5 Light waves and colour. 1.6 Black body radiation and incandescence. 1.7 The colour of incandescent objects. 1.8 Photons. 1.9 Lamps and lasers. 1.10 Vision. 1.11 Colour perception. 1.12 Additive coloration.
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Algebraic and combinatorial properties of simple, coloured walks

2005
We investigate the algebraic rules for functionally inverting a Riordan array given by means of two analytic functions. In this way, we find an extension of the Lagrange Inversion Formula and we apply it to some combinatorial problems on simple coloured walks. For some of these problems we give both an algebraic and a combinatorial proof.
Donatella Merlini, Renzo Sprugnoli, M. Cecilia Verri   +2 more
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The Keeping Properties of Some Colour Photographs

The Journal of Photographic Science, 1974
AbstractDark storage fading of a slow and a fast colour-developed positive film, at various elevated temperatures and at two relative humidities has been measured, at the wavelengths of maximum absorption of the three component dyes. Results have been extrapolated to give rough estimates of cold storage time before perceptible colour chang~s occur ...
C.H. Giles, R. Haslam
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