Daylight defined

Clearly, standardized light sources are desirable for color matching, particularly in view of the phenomenon of illuminant metamerism described below. Over the years CIE has defined several standard illuminants, some of which can be closely approximated by practical sources. In 1931 there was Source A, defined as a tungsten filament incandescent lamp at a color temperature of 2854 K. Sources B and C used filtering of A to simulate noon sunlight and north sky daylight, respectively. Subsequently a series of D illuminants was estabUshed to better represent natural daylight. Of these the most important is Illuminant E). ... 

Fastness to Light. The ISO test for colorfastness to light is DajlightlSO 105-B01. The textile specimen is exposed to daylight under prescribed conditions, including protection from rain, along with a series of blue wool reference samples that fade at defined, prescribed, different rates. 

The lightfastness of a material is defined by the inherent ability of a given pigment-vehicle system to retain its initial color value upon exposure to daylight. It is thus a system-related parameter which cannot be determined in connection with pure pigment only. 

One or more lead molecules may be used as a focusing target. Similarity metrics include Daylight fingerprint Tanimoto similarity. The penalty score for each compound in the library is defined as the distance between it and the most similar lead molecule. The penalty score for the library is the average of the individual compound penalty scores. QSAR predictions and docking scores can also be used in this term. 

Daylight has extended SMILES rules to accommodate general descriptions of molecular patterns and chemical reactions (13). These SMILES extensions are called SMARTS and SMIRKS. SMARTS is a language for describing molecular patterns while SMIRKS defines rules for chemical reaction transformations. 

QUALITATIVE COMMENTS (25 mg, orally) Nothing much happened for about 3 hours, and then I suddenly shot up. I was at the plateau for a fair time, the recovery was difficult to define chronologically. This was in daylight I was reminded very much of LSD. 

The International Commission on Illumination (CIE) International Commission on Illumination (CIE) has defined a set of standard illuminants to be used for colorimetry (International Commission on Illumination 1996). Figure 3.21 shows the CIE illuminants A, C, Z>5o, Z>55, Z>65, and D15. Illuminant A represents the power spectrum of light from a black-body radiator at approximately 2856 K. If this type of light is required for experiments, a gas-filled tungsten filament lamp that operates at a temperature of 2856 K is to be used. Illuminant Z>65 represents a phase of daylight with a correlated color temperature of approximately 6500 K. The CIE recommends to use this illuminant wherever possible. 

D65 is the internationally recognized standard for outdoor daylight as defined in ISO 10977 (1993) (60). ID65 is the equivalent indoor, indirect daylight standard. For a light source emitting significant radiation below 320 nm, (an) appropriate filter(s) may be fitted to eliminate such radiation. 

Visual assessment is performed by comparison with references in diffuse daylight [172], White scales consisting of stages with well-defined whiteness values (e g., the cotton or plastic white scale) can be used [173],... 

Snb-stmctnre diversity is most easily defined using metrics such as the Tanimoto Dissimilarity Index. These metrics are based on linear bitmaps (fingerprints) generated from the molecnlar fragments or compound sub-structures (Figure 3). This approach has been developed extensively by Daylight Chemical Information Systems. ... 

To derive these equations, log P (hydrophobic parameter), MR (molar refrac-tivity index), and MV (molar volume) were calculated using software freely available on the internet (wwwlogP.com, www.daylight.com). The first-order valence molecular connectivity index of substituents was calculated as suggested by Kier and Hall [46,47]. In these equations, is cross-vahdated obtained by the leave-one-out jackknife procedure. Its value higher than 0.6 defines the good predictive ability of the equation. The different indicator variables in these equations were defined as follows. 

One important thing to remember is that "window glass" is defined not as an absorption spectra of its own but rather by the effect it has on the D65 daylight spectrum. 

Riehl and Maupin (23) define indoor lighting as artificial and natural light, neither a well-defined term. There are many different types of artificial radiation sources, and natural light is an undefined term. More correctly, their original statement should state it is a combination of "window-glass filtered" daylight and that from an artificial source. 

D65, daylight, with a CCT of 6500K is defined by the CIE. The International Standards Organization Standard ISO 10977 (1993) refers to this fact. D65 is also known as D6500 or Standard Illuminant D by the CIE, represents daylight over the spectral range 300 to 830 nm was first adopted in 1966. This standard is not a particular lamp but an internationally agreed to spectral power distribution for solar radiation, issued by the CIE as "Technical Report, Solar Irradiance," first edition... 

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