Colour gamut size and shape influence colour preference

2016 ◽  
Vol 49 (8) ◽  
pp. 992-1014 ◽  
Author(s):  
M Wei ◽  
KW Houser ◽  
A David ◽  
MR Krames
Keyword(s):  
Skin Tone ◽  
The Other ◽  
Average Increase ◽  
Colour Preference ◽  
Size And Shape ◽  
Fixed Reference ◽  
Gamut Size ◽  
Shape Influence ◽  
Colour Gamut ◽  
Retail Setting

Two psychophysical experiments were conducted to investigate the effect of colour gamut size and shape on colour preference. In the first, two side-by-side booths were designed to resemble a retail setting with clothing; in the second, a single booth was designed to resemble a restaurant setting, but also included a mirror to permit the observer's evaluation of skin tone. These settings were illuminated with two sets of sources, where, compared to a fixed reference, one set created modest chroma enhancement and the other set created greater increases in object chroma. Within each set, gamut shape varied, meaning different hues were saturated, even though, on average, the spectra created the same average increase in chroma. When objects were unfamiliar, as with the fabrics, all chroma-enhancing spectra were preferred to the fixed reference regardless of the gamut shapes. When familiar objects were present, such as food, observers were more discerning about changes in chroma and hue. We conclude that a graphic of gamut shape is an important adjunct to average measures of colour fidelity and gamut.

Taxonomic review of Epicadinus Simon, 1895 (Araneae: Thomisidae) 

Zootaxa ◽  
2018 ◽  
Vol 4459 (2) ◽  
pp. 201 ◽  
Author(s):  
ANDRÉ WANDERLEY DO PRADO ◽  
RENNER LUIZ CERQUEIRA BAPTISTA ◽  
MIGUEL MACHADO
Keyword(s):  
French Guiana ◽  
The Other ◽  
Valid Species ◽  
Variable Size ◽  
Size And Shape ◽  
Taxonomic Review ◽  
Nomen Dubium ◽  
The World ◽  
Senior Synonym

The genus Epicadinus Simon, 1895 can easily be distinguished from the other Neotropical Stephanopines by their abundant and robust setiferous tubercles, topped by elongated macrosetae, which cover most of the tegument. Additionally, the genus can be recognized by a pair of conical ocular mounds above the ALE, the anterior eye row very recurved, posterior one slightly procurved; carapace flattened and without tubercles, and opisthosoma with three conical projections (“tubercles”) of variable size and shape. This work is a taxonomic review of the 12 valid species of Epicadinus as listed in version 19 of the World Spider Catalogue (2018), whose hitherto known distribution included few records from Brazil, French Guiana, Bolivia and Peru, and only one from Mexico. Four valid species are recognized: Epicadinus biocellatus Mello-Leitão, 1929; E. trispinosus (Taczanowski, 1872) [with two junior synonyms E. trifidus (Pickard-Cambridge, 1893) syn. nov. and E. cornutus (Taczanowski, 1872) syn. nov.]; E. spinipes (Blackwall, 1862) [with two junior synonyms E. albimaculatus Mello-Leitão, 1929 syn. nov. and E. gavensis Soares, 1946 syn. nov]; and E. villosus [with two junior synonyms E. helenae Piza, 1936 syn. nov. and E. marmoratus Mello-Leitão, 1947 syn. nov.]. Epicadinus polyophthalmus Mello-Leitão, 1929 and Epicadinus tuberculatus Petrunkevitch, 1910 are transferred to Epicadus. Epicadus polyophthalmus (Mello-Leitão, 1929) comb. nov. is considered a nomen dubium. Epicadus tuberculatus (Petrunkevitch, 1910) comb. nov. is a senior synonym of Epicadus pustulosus (Mello-Leitão, 1929) syn. nov. 

scholarly journals Root cap size and shape influence responses to the physical strength of the growth medium in Arabidopsis thaliana primary roots

2019 ◽  
Author(s):  
J Roué ◽  
H Chauvet ◽  
N Brunel-Michac ◽  
F Bizet ◽  
B Moulia ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Growth Medium ◽  
Root Cap ◽  
Arabidopsis Mutants ◽  
Physical Strength ◽  
Size And Shape ◽  
Primary Roots ◽  
Root Responses ◽  
Shape Influence

Analysis of the growth and orientation of roots of Arabidopsis mutants with differing root cap sizes and shapes indicates that the form of the cap affects root responses to variations in the strength of the growth medium.

A GRAPH-BASED ALGORITHM FOR CLUSTER DETECTION

2008 ◽  
Vol 22 (05) ◽  
pp. 843-860 ◽  
Author(s):  
PASQUALE FOGGIA ◽  
GENNARO PERCANNELLA ◽  
CARLO SANSONE ◽  
MARIO VENTO
Keyword(s):  
Computer Vision ◽  
State Of The Art ◽  
Cluster Detection ◽  
The Other ◽  
Actual Number ◽  
Number Of Clusters ◽  
Size And Shape ◽  
Computer Vision Applications

In some Computer Vision applications there is the need for grouping, in one or more clusters, only a part of the whole dataset. This happens, for example, when samples of interest for the application at hand are present together with several noisy samples. In this paper we present a graph-based algorithm for cluster detection that is particularly suited for detecting clusters of any size and shape, without the need of specifying either the actual number of clusters or the other parameters. The algorithm has been tested on data coming from two different computer vision applications. A comparison with other four state-of-the-art graph-based algorithms was also provided, demonstrating the effectiveness of the proposed approach.

scholarly journals Does Glass Size and Shape Influence Judgements of the Volume of Wine?

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0144536 ◽  
Author(s):  
Rachel Pechey ◽  
Angela S. Attwood ◽  
Dominique-Laurent Couturier ◽  
Marcus R. Munafò ◽  
Nicholas E. Scott-Samuel ◽  
...  
Keyword(s):  
Size And Shape ◽  
Shape Influence ◽  
Glass Size

Leibniz On Form and Matter

1997 ◽  
Vol 2 (3) ◽  
pp. 326-351 ◽  
Author(s):  
Daniel Garber
Keyword(s):  
Physical World ◽  
The Other ◽  
Middle Years ◽  
Size And Shape ◽  
Mechanical Philosophy ◽  
Other Hand

AbstractThis paper discusses the Aristotelian notions of matter and form as they are treated in the philosophy of Leibniz. The discussion is divided into three parts, corresponding to three periods in Leibniz's development. In the earliest period, as exemplified in a 1669 letter to his former mentor Jakob Thomasius, Leibniz argues that matter and form can be given straightforward interpretations in terms of size and shape, basic categories in the new mechanical philosophy. In Leibniz's middle years, on the other hand, as exemplified in the Discourse on Metaphysics and the correspondence with Arnauld, Leibniz seems to hold a more orthodox Aristotelian view of matter and form as the constituents of the corporeal substances that ground the reality of the physical world. In Leibniz's latest years, as discussed in the letters with Des Bosses, matter and form enter once again in connection with the vinculum substantiale, the substantial bond that is supposed to bind monads together to form corporeal substances.

Gold nanoparticle size and shape influence on osteogenesis of mesenchymal stem cells

Nanoscale ◽  
2016 ◽  
Vol 8 (15) ◽  
pp. 7992-8007 ◽  
Author(s):  
Jingchao Li ◽  
Jia'En Jasmine Li ◽  
Jing Zhang ◽  
Xinlong Wang ◽  
Naoki Kawazoe ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Gold Nanoparticle ◽  
Nanoparticle Size ◽  
Size And Shape ◽  
Shape Influence

Broadband six-way out-of-phase SIW power divider

2015 ◽  
Vol 8 (2) ◽  
pp. 165-170 ◽  
Author(s):  
Kaijun Song ◽  
Abdullahi Nura Ahmed ◽  
Bingkun Hu ◽  
Yu Zhu ◽  
Fulong Chen ◽  
...  
Keyword(s):  
Reasonable Agreement ◽  
Impedance Matching ◽  
The Other ◽  
Input Port ◽  
Power Divider ◽  
Substrate Integrated Waveguide ◽  
Low Loss ◽  
Size And Shape ◽  
Outer Conductor ◽  
Matching Transformer

A broadband six-way out-of-phase substrate-integrated waveguide (SIW) power divider was designed, analyzed, and fabricated for low loss and out of phase dividing applications. The SIW technology was used to realize the power divider; where it consists of a central dual-disc probe connected with coaxial outer-conductor impedance matching transformer and six SIW-to-microstrip transitions as output probes. Three of the SIW-to-microstrip transitions are located at the top plane, whereas the other three are at the bottom plane of the power divider to achieve the out-of-phase dividing functioning. These transitions are all the same in size and shape for symmetry reason. Good transmissions from coaxial input port to six-way SIW power divider were also achieved. There is a reasonable agreement between measured and simulated results.

The appreciation of LED-based white light sources by Dutch and Chinese people in three application areas

2018 ◽  
Vol 51 (3) ◽  
pp. 353-372 ◽  
Author(s):  
X Tang ◽  
C Teunissen
Keyword(s):  
White Light ◽  
Food Packaging ◽  
Skin Tone ◽  
Packaging Material ◽  
Light Sources ◽  
Chinese People ◽  
Fresh Food ◽  
Dutch Study ◽  
Colour Gamut ◽  
Colour Rendering

The aim of this study was to evaluate differences in appreciation for LED-based white-light sources between Dutch and Chinese people, when used for the illumination of three applications: fresh food, packaging material and skin tone. Furthermore, the contribution of the CIE special and general colour rendering indices ( Ri and Ra), a colour gamut measure ( Ga), and chroma changes for specific test-colour samples to perceived attractiveness was investigated. Thirty-four Dutch and 36 Chinese people assessed the attractiveness of the object appearance, with paired comparison experiments, for seven light sources at two CCT settings, 3000 K (Dutch and Chinese) and 4000 K (Chinese only), and a range of Ra and Ga values. It was found that for illuminating fresh food and packaging material, most Dutch and Chinese participants preferred light settings with an increased colour gamut. In contrast to colour rendering indices, the chroma change for the strong red test colour sample could be used to predict object attractiveness, but the established equations were different per application and culture. There was no clear relation between objective measures and skin tone preference for the Dutch study. Finally, Chinese participants did not like an increase in red saturation at 3000 K, but they allowed an increase at 4000 K.

scholarly journals Main characteristics to distinguish Bactericera cockerelli from other psyllids in New Zealand

2009 ◽  
Vol 62 ◽  
pp. 411-411
Author(s):  
P.J. Dale ◽  
M-C. Nielsen
Keyword(s):  
New Zealand ◽  
Dorsal Surface ◽  
The Other ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Size And Shape

The tomato/potato psyllid Bactericera cockerelli (Sulc) (Hemiptera Triozidae) is found throughout most of New Zealand along with a range of native and other introduced psyllids all belonging to the superfamily Psylloidea The Psylloidea contains six families of which four are recorded from New Zealand (Psyllidae Calophyidae Homotomidae and Triozidae) Species belonging to Triozidae have trifurcate branching on the basal vein of the forewing in contrast to the other psyllid families in New Zealand which have bifurcate branching Bactericera cockerelli can be distinguished from other Triozidae species by the number of inner apical spurs on the tibiae of the hind legs (2) size and shape of the cubital cell in the forewing (short and compact) absence of long setae on vertex and dorsal thoracic surfaces and the lack of well developed genal cones Illustrations of these characters can be seen on insectwatchcom Usually body markings in insects are not suitable for identification purposes since these are likely to vary However the very distinct markings (white marginal and inner patch) on the vertex (dorsal surface of head) of B cockerelli seem stable and are a very useful characteristic for distinguishing this species from other psyllids in New Zealand

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