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Navizet Isabelle - - 2010
This is the first report on a multiconfigurational reference second-order perturbation theory-molecular mechanics study of the color modulation of the observed bioluminescence of the oxyluciferin-luciferase complex of the Japanese genji-botaru firefly using structures according to recent X-ray data. Our theoretical results do not support the experimentally deduced conclusion that the ...
Chen Po-Chou - - 2010
A color-separation system that angularly positions color LEDs to produce color separation and a lens array to focus this light onto the pixels is proposed. The LED rays from different incident angles are mapped into corresponding sub-pixel positions to efficiently display color image, which can be used to replace the ...
Vignieri Sacha N - - 2010
The light color of mice that inhabit the sandy dunes of Florida's coast have served as a textbook example of adaptation for nearly a century, despite the fact that the selective advantage of crypsis has never been directly tested or quantified in nature. Using plasticine mouse models of light and ...
Weese Dylan J - - 2010
We conducted 10 mark-recapture experiments in natural populations of Trinidadian guppies to test hypotheses concerning the role of viability selection in geographic patterns of male color variation. Previous work has reported that male guppies are more colorful in low-predation sites than in high-predation sites. This pattern of phenotypic variation has ...
Erdem Talha - - 2010
We report a photometric study of ultra-efficient light emitting diodes (LEDs) that exhibit superior color rendering index (CRI) and luminous efficacy of optical radiation (LER) using semiconductor quantum dot nanocrystal (NC) luminophores. Over 200 million systematically varied NC-LED designs have been simulated to understand feasible performance in terms of CRI ...
Saha Anindita - - 2010
PURPOSE: The necessity for standard instrumentation and measurements of color that are repeatable and reproducible is the major motivation behind this work. Currently, different instrumentation and methods can yield very different results when measuring the same feature such as color uniformity or color difference. As color increasingly comes into play ...
McDermott Kyle C KC Department of Psychology/296, University of Nevada-Reno, NV 89557, - - 2010
We examined how the salience of color is affected by adaptation to different color distributions. Observers searched for a color target on a dense background of distractors varying along different directions in color space. Prior adaptation to the backgrounds enhanced search on the same background while adaptation to orthogonal background ...
Danilova Marina V - - 2010
Are boundaries between color categories associated with enhanced discrimination? In the present experiments, chromatic thresholds were obtained for discriminations along lines orthogonal to the yellow-blue axis of color space. The targets were parafoveal and thresholds were measured with a spatial two-alternative forced choice. In interleaved experimental runs, we also obtained ...
Anderson Barton L - - 2010
Recent work has shown that the decomposition of textures into a layered representation can induce striking percepts of inhomogeneous transparency and modulate the perceived lightness of achromatic textures (B. L. Anderson & J. Winawer, 2005, 2008). It was argued that two photo-geometric principles of perceptual organization were responsible for the ...
Terao Masahiko - - 2010
Human observers see a single mixed color (yellow) when different colors (red and green) rapidly alternate. Accumulating evidence suggests that the critical temporal frequency beyond which chromatic fusion occurs does not simply reflect the temporal limit of peripheral encoding. However, it remains poorly understood how the central processing controls the ...
Lin Yong-Jun - - 2010
The brightness or color appearance of a region may be altered by the presence of a pattern surrounding it in the visual field. The Munker-White effect (grating surround) and brightness or color induction from concentric annuli ('bull's-eye' surround) are two examples. We examined whether these two phenomena share similar properties. ...
Jordan Gabriele - - 2010
Some 12% of women are carriers of the mild, X-linked forms of color vision deficiencies called "anomalous trichromacy." Owing to random X chromosome inactivation, their retinae must contain four classes of cone rather than the normal three; and it has previously been speculated that these female carriers might be tetrachromatic, ...
Rentzeperis Ilias - - 2010
Human visual cortex contains mechanisms that pool local orientation information over large areas of visual space to support percepts of global form. Initial studies concluded that some of these mechanisms are cue invariant, in that they yield form percepts irrespective of whether the visual signals contain luminance or chromatic information. ...
Tchernikov Illia - - 2010
Visual processing of color starts at the cones in the retina and continues through ventral stream visual areas, called the parvocellular pathway. Motion processing also starts in the retina but continues through dorsal stream visual areas, called the magnocellular system. Color and motion processing are functionally and anatomically discrete. Previously, ...
Bernardon Jussara K - - 2010
This study compared the clinical outcome of bleaching techniques in vital teeth. After IRB approval and informed consent, 90 subjects were selected based on the shade of their anterior teeth (A2 or darker, Vita Classic shade guide). Subjects were assigned to three treatment groups in a split-mouth study design: Group ...
Singaravelan Natarajan - - 2010
Coat coloration in mammals is an explicit adaptation through natural selection. Camouflaging with the environment is the foremost evolutionary drive in explaining overall coloration. Decades of enquiries on this topic have been limited to repetitive coat color measurements to correlate the morphs with background/habitat blending. This led to an overwhelming ...
Anderson Barton L - - 2010
Recent work has shown that the decomposition of textures into a layered representation can induce striking percepts of inhomogeneous transparency and modulate the perceived lightness of achromatic textures (B. L. Anderson & J. Winawer, 2005, 2008). It was argued that two photo-geometric principles of perceptual organization were responsible for the ...
Marín-Franch Iván - - 2010
The ability to perceptually identify distinct surfaces in natural scenes by virtue of their color depends not only on the relative frequency of surface colors but also on the probabilistic nature of observer judgments. Previous methods of estimating the number of discriminable surface colors, whether based on theoretical color gamuts ...
Sznitman Raphael - - 2010
It has been shown that excessive white light exposure during retinal microsurgery can induce retinal damage. To address this problem, one can illuminate the retina with a device that alternates between white, and less damaging limited-spectrum light. The surgeon is then presented with a fully colored video by recoloring the ...
Kingdom Frederick A A - - 2010
Most objects in natural scenes are suprathreshold in both color (chromatic) and luminance contrast. How salient is each dimension? We have developed a novel method employing a stimulus similar to that used by B. C. Regan and J. D. Mollon (1997) who studied the relative saliencies of the two chromatic ...
Tseng Feng-Yi - - 2010
Human performance on color discrimination in visual display terminals may be affected by illuminant colors, the level of ambient illumination and background colors of the monitor. Few studies have focused on this topic. This study investigated human color discrimination ability in a simulated control room. Ten subjects were recruited as ...
Francis Gregory - - 2010
Van Lier, Vergeer, and Anstis (2009) reported that color information in a visual afterimage could spread across regions that were not colored in the inducing stimulus. The perceived color and shape of the afterimage could be manipulated by drawn contours that apparently trap the spread of afterimage color signals. They ...
Lai Chien-Jung - - 2010
The advancement in variable message signs (VMS) technology has made it possible to display message with various formats. This study presented an ergonomic study on the message design of Chinese variable message signs on urban roads in Taiwan. Effects of color scheme (one, two and three) and number of message ...
Park Ho-Cheol - - 2009
New type of White-Light Emitting Diode (WOLED) that emits three primary colors of red, green and blue has been demonstrated. WOLED is properly laid out with emitting layers so that all three wavelengths of light can be emitted by using fit energy level, and the organic functional layer named white ...
Cha Hyun-Suk - - 2009
PURPOSE: To determine the difference in illuminant-dependent color changes of shade guide tabs of Vita Lumin (VITA), Chromascop (CHRO) and Vita 3D-Master (3D-M) shade guides by the shade designation in each shade guide. METHODS: Color of 16 tabs of VITA, 20 tabs of CHRO and 29 tabs of 3D-M was ...
Arnoldi Frederico G C - - 2010
Among bioluminescent beetles of Elateroidea superfamily, railroad-worms (Phengodidae) produce the widest range of colors, from green to red, using the same luciferin-luciferase system. Members of the Mastinocerini tribe display additional unique cephalic organs that emit red-shifted light, with Phrixothrix railroad-worms being the most dramatic cases with head lanterns emitting red ...
Su Jung-Chieh - - 2009
This study proposed a correlated color temperature (CCT) tunable phosphor-converted white light emitting diode (LED) with an omni-directional reflector (ODR). Applying current to each individual InGaN based ultraviolet, purple and blue source LED chip of the white LED package, we can achieve the CCT tunability. The optimum color properties of ...
Baraas Rigmor C - - 2010
Purpose. Color-vision deficiency is associated with abnormalities in color matching and color discrimination, but its impact on the ability of people to judge the constancy of surface colors under different lights (color constancy) is less clear. This work had two aims: first, to quantify the degree of color constancy in ...
Brouwer Gijs Joost GJ Department of Psychology and Center for Neural Science, New York University, New York, NY 10003, USA. - - 2009
How is color represented by spatially distributed patterns of activity in visual cortex? Functional magnetic resonance imaging responses to several stimulus colors were analyzed with multivariate techniques: conventional pattern classification, a forward model of idealized color tuning, and principal component analysis (PCA). Stimulus color was accurately decoded from activity in ...
Oh Won-suk - - 2009
To compare the interobserver difference in visual shade matching and estimate the precision of color discrimination. Visual shade matching of a maxillary central incisor of 33 subjects was performed by 2 prosthodontists independently in a chair under ceiling daylight-corrected fluorescent lighting, using the Vitapan Classical and the Vitapan 3D Master ...
Michael George A - - 2010
The nature of the recently discovered color-induced nasal thermal sensations was investigated in four Experiments. Subjects were required to fixate a bottle containing a red or green solution presented centrally (Exp1 and Exp4) or laterally (Exp2) and to sniff another bottle, always the same one, but which they were not ...
Frausto-Reyes C - - 2009
Spectroscopic and colorimetric analysis of a representative set of Dug??s watercolor paintings was performed. These paintings were the result of scientific studies carried out by the zoologist Alfredo Dug??s, who recorded the fauna of the Mexican Republic between 1853 and 1910. Micro-Raman spectroscopy, with an excitation wavelength of 830 nm, ...
Walter Annette - - 2009
A novel measurement setup for determining the change in color perception due to laser protection filters is described. The developed system overcomes color space limitations common to thin-film transistor displays by using a LED illumination system, creating a large gamut covering a wide range of human color perception, and allowing ...
Huang Ting-Wei - - 2009
The gamut boundary description (GBD) of multiprimary color displays (MPD) is important for color gamut mapping. Dependent primary color (DPC) is the color stimulus of a controllable color channel represented by an additive mixture of positive amounts of other primary colors. We propose a method to obtain the GBD of ...
Lin Chin-Chiuan - - 2009
An empirical study was carried out to examine the effects of color combination and ambient illumination on visual perception time using TFT-LCD. The effect of color combination was broken down into two subfactors, luminance contrast ratio and chromaticity contrast. Analysis indicated that the luminance contrast ratio and ambient illumination had ...
Coelho A S - - 2009
Entanglement is an essential quantum resource for the acceleration of information processing as well as for sophisticated quantum communication protocols. Quantum information networks are expected to convey information from one place to another by using entangled light beams. We demonstrated the generation of entanglement among three bright beams of light, ...
Tiwari B K - - 2009
Grape juice samples were ozonated with processing variables of ozone concentration (1.6-7.8% w/w) and treatment time (0-10 min). Effects of processing variables on grape juice color values (L, a and b) and anthocyanins were determined. The changes in lightness (L) values and total color difference (TCD) values were fitted well ...
Manríquez Patricio H - - 2009
We report a mechanism of crypsis present during the vulnerable early post-metamorphic ontogeny (</=20 mm peristomal length) of the muricid snail Concholepas concholepas, a rocky shore keystone predator characteristic of the southeastern Pacific coast. In the field, we found a significant occurrence (>95%) of specimens bearing patterns of shell coloration ...
Johnson Colleen - - 2009
BACKGROUND: Scalp psoriasis is reported to occur in 50-80% of psoriasis sufferers. Treatment of scalp psoriasis requires special consideration of product esthetics and staining potential due to the presence of hair. AIM: To evaluate the potential of a new, marketed liquor carbonis distillate (LCD; coal tar) solution to discolor naturally ...
Montazer Majid - - 2010
In current study, the effects of different enzymatic treatment including acid cellulases, neutral cellulases, and combination of laccases with cellulases on denim garment were investigated. The color changes of different samples were compared by colorimetric indices for the garment surface and back and also white pocket. Abrasion resistance, tensile strength, ...
Madill Stephen A - - 2009
BACKGROUND: We sought to determine whether the change in cortical excitability secondary to deafferentation in patients with Charles Bonnet Syndrome (CBS) who hallucinate in a predominant color or combination of colors is related to an alteration in color contrast thresholds and whether the change is specific to the color of ...
Liu George Y GY Division of Pediatric Infectious Diseases and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA. - - 2009
A hallmark feature of several pathogenic microbes is the distinctive color of their colonies when propagated in the clinical laboratory. Such pigmentation comes in a variety of hues, and has often proven useful in presumptive clinical diagnosis. Recent advances in microbial pigment biochemistry and the genetic basis of pigment production ...
Changizi Mark - - 2010
Central cyanosis refers to a bluish discoloration of the skin, lips, tongue, nails, and mucous membranes, and is due to poor arterial oxygenation. Although skin color is one of its characteristic properties, it has long been realized that by the time skin color signs become visible, oxygen saturation is dangerously ...
Green Lisa - - 2009
Two light-driven molecular switches with tetrahedral and axial chirality were synthesized, which can induce a helical superstructure in an achiral liquid crystal host and dynamically phototune it to achieve reversible reflection color.
Yan Caijie - - 2009
A three-dimensional (3D) color display with 360 degrees omnidirectional views is developed by use of a high frame rate digital micromirror device projector and three-color light-emitting diodes as the light source. The high-speed projector can project a series of color images on a rotating anisotropic diffusing mirror that controls the ...
Maeno Koutaro - - 2009
To understand the underlying trans-generational phase accumulation, a classical morphometric characteristic, the F/C ratio (F, hind femur length; C, maximum head width), of adult desert locusts (Schistocerca gregaria) was monitored over eight consecutive generations. Adult F/C ratios, which are larger in solitarious locusts than in gregarious ones, were negatively correlated ...
Eskew Rhea T RT - - 2009
A large number of studies, using a wide variety of experimental techniques, have investigated the "higher-order" color mechanisms proposed by Krauskopf and colleagues in 1986. Results reviewed here come from studies of chromatic discrimination at threshold, habituation, classification images, spatial alignment and orientation effects, and noise masking. The bulk of ...
Cheney Karen L - - 2009
Marine cleaning symbioses are classic examples of mutualism: cleaners remove and consume ectoparasites from "client" fish, while clients benefit from a reduction in ectoparasites. However, how clients recognize cleaners and decide not to eat them is unclear. Color and body pattern are thought to be important in signaling cleaning services ...
Lettieri L - - 2009
Elacatinus gobies of the Caribbean have undergone rapid speciation along ecological axes, and particular species from this genus act as 'cleaners' that remove ectoparasites from larger coral reef fish, termed 'clients'. Evolutionary shifts in habitat use, behavior and lateral body stripe colors differentiate cleaners from ancestral sponge-dwelling lineages. High-contrast stripe ...
Maciel Linhares João Manuel - - 2009
Color rendering indices are used to access the quality of lighting but, in addition to other well-known limitations, are not defined for color deficient observers. We evaluated the quality of lighting for normal and color deficient observers in the context of art paintings by estimating the number of colors they ...
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