Results 21 to 30 of about 51,899 (293)

On covariant non-constancy of distortion and inversed distortion tensors [PDF]

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2022
The paper deals with covariant constancy problem for tensors and pseudotensors of an arbitrary rank and weight in an Euclidean space. Requisite preliminaries from pseudotensor algebra and analysis are given.
Yuri N. Radayev   +2 more
doaj   +1 more source

Size Constancy Mechanisms: Empirical Evidence from Touch

open access: yesVision, 2022
Several studies have shown the presence of large anisotropies for tactile distance perception across several parts of the body. The tactile distance between two touches on the dorsum of the hand is perceived as larger when they are oriented ...
Luigi Tamè   +4 more
doaj   +1 more source

Adaptive colour constancy algorithm using discrete wavelet transform [PDF]

open access: yes, 2012
The colours of chromatically homogeneous object surfaces measured by a sensor vary with the illuminant colour used to illuminate the objects. In contrast, colour constancy enables humans to identify the true colours of the surfaces under varying ...
Tjahjadi, Tardi   +3 more
core   +1 more source

The weed species composition in a reed canary grass (Phalaris arundinacea L.) plantation for energy purposes depending on its age

open access: yesActa Agrobotanica, 2014
The present experiment, carried out in nine production fields of reed canary grass (Phalaris arundinacea) grown for energy purposes, evaluated the effect of plantation age on the occurrence and species composition of weeds.
Tomasz R. Sekutowski   +3 more
doaj   +1 more source

The effect of background and illumination on color identification of real, 3D objects

open access: yesFrontiers in Psychology, 2013
For the surface reflectance of an object to be a useful cue to object identity, judgments of its color should remain stable across changes in the object's environment. In 2D scenes, there is general consensus that color judgments are much more stable
Sarah Ray Allred, Maria eOlkkonen
doaj   +1 more source

Weed infestation of a cereal-legume mixture depending on its concentration and position in a crop rotation

open access: yesActa Agrobotanica, 2012
A field study was carried out in the period 2000-2006 at the Experimental Station in Tomaszkowo belonging to the University of Warmia and Mazury in Olsztyn.
Marta K. Kostrzewska   +2 more
doaj   +1 more source

Global Conharmonic Concept Type Nearly Kahler Manifold

open access: yesTikrit Journal of Pure Science, 2023
The concept of permanence conharmonic type Nearly Kahler manifold conditions are obtained when the Nearly Kahler manifold is a manifold conharmonic constant type.
Ali A. Shihab
doaj   +1 more source

Colour constancy [PDF]

open access: yes, 2020
At first pass, colour constancy occurs when one sees a thing in one’s environment to have a stable colour despite differences in the way it is illuminated at a time (simultaneous constancy) or over time (successive constancy).
Brown, Derek H., Derek H. Brown
core   +1 more source

Variation in weed infestation of sugar beet (Beta vulgaris L. subsp. vulgaris) depending on the intensity of chemical protection of plantations

open access: yesActa Agrobotanica, 2014
A floristic study was conducted over the period 2010–2012, using the Braun-Blanquet method, under which vegetation relevés were made in sugar beet (Beta vulgaris L. subsp. vulgaris) plantations in Lower Silesia.
Krzysztof Domaradzki   +2 more
doaj   +1 more source

Interracial contact and racial constancy: A multi-site study of racial intergroup bias in 3-5 year old Anglo-British children [PDF]

open access: yes, 2005
This paper examined the influence of interracial contact and racial constancy on the racial intergroup bias of young Anglo-British children. This multi-site study was conducted in areas of Great Britain that varied in terms of racial diversity. The study
Rutland, Adam   +3 more
core   +1 more source

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