The perceived colour from a surface does not only depend on its optical properties and the illumination. Several studies have demonstrated the simultaneous contrast effect that makes the appearance of coloured patches depend on neighbouring colours. In this study the perceived whiteness of white patches surrounded by induction fields of different shades was evaluated by asking observers to give...

Whiteness, although frequently apparent on the wings, legs, antennae, or bodies of many species of moths and butterflies, along with other colors and shades, has often escaped our attention. Here, we investigate the nanostructure and microstructure of white spots on the wings of Carystoides escalantei, a dusk-active and shade-inhabiting Costa Rican rain forest butterfly (Hesperiidae). On both m...

Paper is widely used as a substrate for inkjet printing, where the paper feature heavily impacts the print quality, especially the color reproduction. The unprinted area on paper is visible and applied as a background reflectance for the toner layer. Hence, it is worthwhile to understand the effects of paper whiteness on print color reproduction. In this study, the tested papers were treated wi...

Aim: The aim of this in vitro study is to describe a preclinical investigation using laser-activated bleaching agent for discolored teeth. Materials and methods: Sixty sound human central and lateral incisors were selected for this study and were randomly assigned into four groups as follows: Group 1 (n=15): only Whiteness HP 10 min; Group 2 (n=15): diode laser, wavelength 980 nm power 0.8 W–30...

The recent discovery of brilliant whiteness in ultrathin beetle scales indicated the availability of significant whiteness, brightness, and opacity from limited sample thickness. This is achieved in the beetle through optimization of the packing density of scattering centers in its elytral scales. Here, we directly test and apply this idea to whiteness and brightness in the production and appea...

Inspired by the white beetle of the genus Cyphochilus, we fabricate ultra-thin, porous PMMA films by foaming with CO2 saturation. Optimising pore diameter and fraction in terms of broad-band reflectance results in very thin films with exceptional whiteness. Already films with 60 µm-thick scattering layer feature a whiteness with a reflectance of 90%. Even 9 µm thin scattering layers appear whit...

In her paper, "Hybridity and Whiteness in Claudine C. O'Hearn's Half and Half: Writings on Growing up Biracial and Bicultural," Heather Latimer examines the autobiographical collection Half and Half: Writings on Growing up Biracial and Bicultural assembled and edited by Claudine C. O'Hearn. Latimer's analysis reveals how current models of hybridity theory are performed, articulated, and exempli...

This paper aims at obtaining performance limitations of state estimation in terms of variance minimization (minimum variance estimation and filtering) using information theory. Two new notions, negentropy rate and Gaussianity-whiteness measure (joint Shannon-Wiener entropy), are proposed to facilitate the analysis. Topics such as Gaussianing-whitening filter (the maximum Gaussianity-whiteness m...

This article describes a project designed to change the climate of whiteness in academic nursing. Using an emancipatory, antiracist perspective from whiteness studies, we describe a project that helped faculty and staff to work together to challenge and begin to change the status quo of unnamed white privilege and racial injustice in nursing education.