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Huang Shan - - 2014
In order to obtain a single-host-white-light phosphor used for near ultraviolet (NUV) light emitting diodes (LEDs), the NaSrPO4:Eu2+, Tb3+, Mn2+ powder samples were synthesized via a high temperature solid-state reaction. XRD investigation shows a single phase. Energy transfer processes is discussed by analyzing the photoluminescence (PL) and photoluminescence excitation (PLE) ...
Cao Chunyan - - 2014
Ln3+ (Ln3+ = Ce3+, Tb3+) single doped and/or co-doped NaGdF4 phosphors have been synthesized through a solid state reaction method under a weak reducing N2/H2 (95/5) atmosphere. The phosphors were characterized by X-ray diffraction (XRD) patterns, room temperature photoluminescence (PL) excitation and emission spectra, and luminescent dynamics decay curves. XRD ...
Bulloch Rayford H RH School of Chemistry and Biochemistry and School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Institute of Technology , Atlanta, Georgia 30332, United - - 2014
Although synthetic efforts have been fruitful in coarse color control, variations to an electrochromic polymer (ECP) backbone are less likely to allow for the fine control necessary to access the variations and shades of color needed in display applications. Through the use of thin films of cyan, magenta, and yellow ...
Shiraishi Yasuhiro - - 2014
UV or visible light irradiation of gold nanoparticles (AuNPs) modified with a thiol-terminated spiropyran dye promotes reversible aggregation or dispersion of AuNPs. This is facilitated by the electrostatic repulsion/attraction between the AuNPs controlled by the ring-opening/closing photoisomerization of the surface dyes. This photochemical method successfully produces aggregates of AuNPs with ...
Vlahos Lisa M LM ARC Centre of Excellence in Vision Science, The Australian National University, Canberra, ACT, 0200, Australia; Research School of Biology, College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, 0200, - - 2014
Marsupials are believed to be the only non-primate mammals with both trichromatic and dichromatic colour vision. The diversity of colour vision systems present in marsupials remains mostly unexplored. Marsupials occupy a diverse range of habitats, which may have led to considerable variation in the presence, density, distribution, and spectral sensitivity ...
Yu Zhaoliang Z Department of Anatomy and Neurobiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, - - 2014
Neuroglobin (NGB), a protein highly expressed in the retina, has been shown to be up-regulated to protect neurons from hypoxic and ischemic injuries. It exhibits neuroprotective functions and plays an important role in the survival of neurons. Recent studies show that LED white light emitted significant amounts of blue light ...
Lu Hao - - 2014
ZnO nanostructures were manipulated, via a low-temperature solution process, from pure nanorod arrays to complex nanostructures of microflowers on nanorod arrays with adjusted quantities of flowers. We proposed the mechanism of local dissolution-driven growth to rationally discuss the novel growth process. These nanostructures were used as photoanodes in dye-sensitized solar ...
Carle Corinne F CF ARC Centre of Excellence in Vision Science, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, - - 2014
This study investigated the diagnostic utility for glaucoma of multifocal pupillographic objective perimetry (mfPOP) stimuli targeting different components of the pupillary response: cortically-derived colour responses, and subcortical luminance responses. Observational cross-sectional study undertaken at the Australian National University. Thirty-five eyes of 24 glaucoma subjects and 46 eyes of 23 normal ...
Ieda Naoya - - 2014
Spatiotemporally controllable nitric oxide (NO)-releasers allow us to analyze the physiological effects of NO, a gaseous mediator that modulates many biological signaling networks, and are also candidate chemotherapeutic agents. We designed and synthesized a blue-light-controllable NO releaser, named NOBL-1, which bears an N-nitrosoaminophenol moiety for NO release tethered to a ...
Lu Aitao A Center for Studies of Psychological Application & School of Psychology, South China Normal University, China; Guangdong Key Laboratory of Mental Health and Cognitive Science, China; Guangdong Center of Mental Assistance and Contingency Technique for Emergency, - - 2014
The present study used the event-related potential technique to investigate the nature of linguistic effect on color perception. Four types of stimuli based on hue differences between a target color and a preceding color were used: zero hue step within-category color (0-WC); one hue step within-category color (1-WC); one hue ...
Kinoshita Michiyo M Laboratory of Neuroethology, Sokendai-Hayama (The Graduate University for Advanced Studies), Shonan Village, Hayama, 240-0115, Japan, - - 2014
This paper gives an overview of behavioral studies on the color and polarization vision of the Japanese yellow swallowtail butterfly, Papilio xuthus. We focus on indoor experiments on foraging individuals. Butterflies trained to visit a disk of certain color correctly select that color among various other colors and/or shades of ...
Li Wei W State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China. baifq@jlu.edu.cn - - 2014
DSSCs have been extensively investigated in the past decade, and the search for more efficient dyes for DSSCs remains challenging. In this work we discuss the influences of elongating π-spacers and rigidifying dithiophene on the performance of dithiafulvenyl (DTF)-based organic dyes using density functional theory (DFT) and time-dependent DFT methods. ...
Deng Zhiping - - 2014
Plants adapt to environmental light conditions by photoreceptor-mediated physiological responses, but the mechanism by which photoreceptors perceive and transduce the signals is still unresolved. Here, we used 2-D difference gel electrophoresis (2-D DIGE) and mass spectrometry to characterize early molecular events induced by short blue-light exposures in etiolated Arabidopsis seedlings. ...
van der Kooi Casper J CJ Computational Physics, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, NL-9747 AG, Groningen, the Netherlands; Plant Physiology, Centre for Ecological and Evolutionary Studies, University of Groningen, Nijenborgh 7, NL-9747 AG, Groningen, the - - 2014
The color of natural objects depends on how they are structured and pigmented. In flowers, both the surface structure of the petals and the pigments they contain determine coloration. The aim of the present study was to assess the contribution of structural coloration, including iridescence, to overall floral coloration. We ...
Mo Xiaoming X School of Physics and Technology, Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China. - - 2014
Light-emitting diodes (LEDs) based on n-ZnO@i-MgO core-shell (CS) nanowires (NWs) are herein demonstrated and characterized. MgO insulating layers were rationally introduced as shells to modify/passivate the surface defects of ZnO NWs. A high-quality ZnO/MgO interface was attained and the optically pumped near-band-edge emission of the bare ZnO NWs was greatly ...
Miyake Kotone - - 2014
Cyanobacteria are an attractive candidate for the production of biofuel because of their ability to capture carbon dioxide by photosynthesis and grow on non-arable land. However, because huge quantities of water are required for cultivation, strict water management is one of the greatest issues in algae- and cyanobacteria-based biofuel production. ...
Stavenga Doekele G DG Computational Physics, Zernike Institute for Advanced Materials, University of Groningen, 9747, AG Groningen, The Netherlands, - - 2014
The ventral hindwings of Pipevine Swallowtail butterflies, Battus philenor, display a colourful pattern, created by variously coloured wing scales. Reflectance and transmittance measurements of single scales indicate that the cream and orange scales contain papiliochrome pigments, while brown, black and blue scales contain melanin. Microspectrophotometry and scatterometry of both sides ...
Miyazaki Sho S Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, - - 2014
We report a novel physiological response to blue light in the moss Physcomitrella patens . Blue light regulates ent -kaurene biosynthesis and avoidance response to protonemal growth. Gibberellins (GAs) are a group of diterpene-type plant hormones biosynthesized from ent-kaurenoic acid via ent-kaurene. While the moss Physcomitrella patens has part of ...
Chen Kuo-Ju KJ Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan. - - 2014
To enhance the uniformity of correlated color temperature (CCT) and luminous flux, we integrated ZrO2 nanoparticles into white light-emitting diodes. This novel packaging scheme led to a more than 12% increase in luminous flux as compared to that in conventional dispensing structures. This was attributed to the scattering effect of ...
Sung Jiun-Yu - - 2014
Visible light communication (VLC) using LEDs has attracted significant attention recently for the future secure, license-free and electromagnetic-interference (EMI)-free optical wireless communication. Dimming technique in LED lamp is advantageous for energy efficiency. Color control can be performed in the red-green-blue (RGB) LEDs by using dimming technique. It is highly desirable ...
Roulin Alexandre A Department of Ecology and Evolution, University of Lausanne, Building Biophore, 1015, Lausanne, - - 2014
Climate warming leads to a decrease in biodiversity. Organisms can deal with the new prevailing environmental conditions by one of two main routes, namely evolving new genetic adaptations or through phenotypic plasticity in order to modify behaviour and physiology. Melanin-based coloration has important functions in animals including a role in ...
Yan Xuedong X a MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, School of Traffic and Transportation , Beijing Jiaotong University , Beijing , 100044 , P. R. China , Email: 12114243@bjtu.edu.cn , Email: - - 2014
ABSTRACT Objective: Drivers' incorrect decisions of crossing signalized intersections at the onset of the yellow change may lead to red-light running (RLR), and RLR crashes result in substantial numbers of severe injuries and property damages. In recent years, some ITS concepts has been focused on reducing RLR by alerting drivers ...
Friedman Nicholas R NR Department of Biological Sciences, University of Maryland, Baltimore County, Baltimore, MD 21250, USA; Department of Zoology & Laboratory of Ornithology, Faculty of Science, Univerzita Palackého v Olomouci, Olomouc 779 00, Czech Republic. Electronic address: - - 2014
While many recent studies focus on the functions of carotenoids in visual signaling, they seldom address the phylogenetic origins of plumage coloration and its mechanisms. Here, we used the New World orioles (Icterus) as model clade to study the history of orange carotenoid-based coloration and pigmentation, sampling 47 museum specimens ...
Devinck Frédéric - - 2014
The spatial selectivity of the watercolor effect (WCE) was assessed by measuring its strength as a function of the luminance contrast of its inducing contours for different spatial configurations, using a maximum likelihood scaling procedure. The approach has previously been demonstrated to provide an efficient method for investigating the WCE ...
Pardo Pedro J - - 2014
In a previous work [J. Opt. Soc. Am. A29, A209 (2012)], we presented a visual color discrimination experiment whose results established the existence of a relationship between the correlated color temperature (CCT) of a light source and the color discrimination capacities of the observers. The results indicated the existence of ...
Schmidt Brian P - - 2014
De Valois and De Valois [Vis. Res.33, 1053 (1993)] showed that to explain hue appearance, S-cone signals have to be combined with M versus L opponent signals in two different ways to produce red-green and yellow-blue axes, respectively. Recently, it has been shown that color appearance is normal for individuals ...
Foote Katharina G - - 2014
Signals from rod photoreceptors bias (shift) the hues determined by cone photoreceptors for extrafoveal mesopic stimuli, creating green, blue, and red rod hue biases at long, middle, and short wavelengths, respectively. The fovea contains far fewer rods and S cones but may not be immune to rod hue biases. Here, ...
Fukuda Kazuho - - 2014
Theoretical and experimental approaches have proposed that color constancy involves a correction related to some average of stimulation over the scene, and some of the studies showed that the average gives greater weight to surrounding bright colors. However, in a natural scene, high-luminance elements do not necessarily carry information about ...
Tregillus Katherine - - 2014
Many forms of color adaptation have been found to reflect both short- and long-term adjustments. We explored the buildup and decay of adaptation to chromatic contrast (temporal modulations of color) for which the dynamics are unknown. A matching task was used to track the perceived contrast of chromatic pulses of ...
Smithson Hannah E - - 2014
We present a new analysis of Robert Grosseteste's account of color in his treatise De iride (On the Rainbow), dating from the early 13th century. The work explores color within the 3D framework set out in Grosseteste's De colore [see J. Opt. Soc. Am. A29, A346 (2012)], but now links ...
Lee Barry B - - 2014
The physiology and anatomy of the primate visual pathway are reviewed from a historical perspective, especially in relation to color vision. From the work of the last decades, certain issues have been selected which remain unresolved and still pose a challenge for neurobiologists and psychophysicists. It is suggested that the ...
Opper Jamie K - - 2014
Foveal and peripheral hue-scaling data were obtained for a 1° foveal stimulus and a 3° stimulus presented at 10° retinal eccentricity under both bleach (reducing rod input) and no-bleach (permitting rod input) conditions. Uniform appearance diagrams (UADs) were generated from the data. Peripheral stimuli appeared more saturated than foveal stimuli ...
Coia Andrew J - - 2014
The watercolor effect is a visual illusion that manifests itself as a combination of long-range color spreading and figure-ground organization. The current study uses behavioral and physiological measures to study the watercolor effect. We utilize a novel technique of measuring the cortical response of the illusion using the visual evoked ...
Mizokami Yoko - - 2014
The recognition of spatial structures is important for color constancy because we cannot identify an object's color under different illuminations without knowing which space it is in and how that space is illuminated. To show the importance of the natural structure of environments on color constancy, we investigated the way ...
Danilova M V - - 2014
Under conditions of adaptation to a steady neutral field (metameric to Daylight Illuminant D65), forced-choice thresholds for color discrimination were measured for brief targets presented to the human fovea. Measurements were made along +45° and -45° lines in a MacLeod-Boynton chromaticity space scaled so that the locus of unique yellow ...
Amano Kinjiro - - 2014
Where observers concentrate their gaze during visual search depends on several factors. The aim here was to determine how much of the variance in observers' fixations in natural scenes can be explained by local scene color and how that variance is related to viewing bias. Fixation data were taken from ...
Dong Shuwen - - 2014
Psychophysical experiments have been carried out in which the color appearance of high-gloss and low-gloss color printing atlases was assessed using a magnitude estimation method under three different light sources. A linearity fitting algorithm by the method of least squares was applied to evaluate the correlation between visual experiment data ...
Zlatkova Margarita - - 2014
To investigate the effect of induced intraocular straylight on the Farnsworth-Munsell 100-hue test performance in individuals with light and dark irides, 28 young subjects were tested both with and without a quantified light-scattering filter. The filter produced a significant increase in the total error scores (p<0.05), but no significant correlation ...
Gunther Karen L - - 2014
Cardinal color performance (reddish, greenish, bluish, yellowish, black, and white) has been shown to decline in peripheral viewing. What about non-cardinal color performance (e.g., orange, burgundy, and sky blue)? In visual search, performance on non-cardinal colors matched that of the cardinal colors in the (L-M)/(S-(L+M)) (isoluminant) color plane (Experiment 1, ...
Webster Jacquelyn - - 2014
The average of a color distribution has special significance for color coding (e.g., to estimate the illuminant) but how it depends on the visual representation (e.g., perceptual versus cone-opponent) or nonlinearities (e.g., categorical coding) is unknown. We measured the perceived average of two colors shown alternated in spatial arrays. Observers ...
Gunther Karen L - - 2014
This study tested two hypotheses: (1) that non-cardinal color mechanisms may be due to individual differences: some subjects have them (or have stronger ones), while other subjects do not; and (2) that non-cardinal mechanisms may be stronger in the isoluminant plane of color space than in the two planes with luminance. Five ...
Dixon Erica - - 2014
In simultaneous brightness contrast (SBC) demonstrations, identical mid-luminance disks appear different from each other when one is placed on a black background while the other is placed on a white background. The strength of SBC effects can be enhanced by placing a semi-transparent layer on top of the display (Meyer's ...
Bosten J M - - 2014
Red, green, blue, yellow, and white have been distinguished from other hues as unique. We present results from two experiments that undermine existing behavioral evidence to separate the unique hues from other colors. In Experiment 1 we used hue scaling, which has often been used to support the existence of ...
Wang Wei - - 2014
Wu et al. [Nature429, 262 (2004)] describe a visual illusion in which color and motion are incorrectly bound: green dots moving downward and red dots moving upward are seen as green dots going up and red dots going down. The present study determined whether S cones contribute to color-motion feature-binding errors, ...
Buck Steven L - - 2014
Equilibrium (unique) red, green, blue, and yellow stimuli look bright in a black surround, but they look dark in a bright white surround, and yellow changes to brown. We investigated differences in equilibrium-hue chromaticity between bright and dark hues to reveal changes in weighting of cone and rod signals. The ...
Locke Edwin A EA University of - - 2014
Comments on the article, "Color-blind racial ideology: Theory, training, and measurement implications in psychology," by Neville et al. (see record 2013-31242-001). E. A. Locke was disappointed by the Neville et. al's article on racial color-blindness. It was a very puzzling mixture of psychology, sociology, sense perception, the subconscious, and politics. ...
Seidenari Stefania S Department of Dermatology and Venereology, University of Modena and Reggio Emilia, 41124 Modena, - - 2014
The aim of this study was to assess the frequency of classic dermoscopic basal cell carcinoma (BCC) features and the sensitivity of new descriptors, such as light brown nests (homogeneous and structured) only visible employing a high magnification digital videomicroscope. A retrospective analysis of 2,024 highly magnified digital images referring ...
Wang Shuan S Key Laboratory of Materials Physics, Anhui Key Lab of Nanomaterials and Nanostructure, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei (P.R. China); University of Science and Technology of China, Hefei 230026 (P.R. - - 2014
A facile route to synthesize amorphous TiO2 nanospheres by a controlled oxidation and hydrolysis process without any structure-directing agents or templates is presented. The size of the amorphous TiO2 nanospheres can be easily turned from 20 to 1500 nm by adjusting either the Ti species or ethanol content in the reaction ...
Lunau Klaus K Department of Biology, Institute of Sensory Ecology, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany, - - 2014
The visual ecology of flies is outstanding among insects due to a combination of specific attributes. Flies' compound eyes possess an open rhabdom and thus separate rhabdomeres in each ommatidium assigned to two visual pathways. The highly sensitive, monovariant neural superposition system is based on the excitation of the peripheral ...
Garcia-Amorós Jaume J Grup de Materials Orgànics, Departament de Química Orgànica, Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, E-08028, Barcelona, Spain. - - 2014
4-Alkoxy-4'-cyanoazobenzenes are organic chromophores with great applicability within present nanotechnology. However, the use of such azo dyes for obtaining light-triggered artificial muscle-like actuators remains still unexplored. Achieving further knowledge about the thermal back reaction and isomerisation mechanism for these types of azoderivatives is essential to get photo-actuators with the desired ...
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