Results 51 to 60 of about 128,830 (335)

Evaluating Test Image Quality as a Function of illumation [PDF]

open access: yesEngineering and Technology Journal, 2010
The optical imaging systems, do not give a perfect and ideal image. Butmostly give images with limited resolutions i.e. give images with blur edges. Thisblurring attributed to two main reasons.
doaj   +1 more source

Inheritance of coat colour in Slovak Pinzgau cattle [PDF]

open access: yesJournal of Central European Agriculture, 2016
The objective of the work was analysis of chestnut coat colour inheritance of Slovak Pinzgau cattle in accordance to age and farming system. In 304 cows of breeding groups P0,P1,P2 and R3 born between 2000 to 2010 from four breeding herds (4 agricultural
Radovan Kasarda   +4 more
doaj   +1 more source

Visual computation of surface lightness: Local contrast vs. frames of reference [PDF]

open access: yes, 2010
Seeing black, white and gray surfaces, called lightness perception, might seem simple because white surfaces reflect 90% of the light they receive while black surfaces reflect only 3%, and the human retina is composed of light sensitive cells.
Alan Gilchrist, Ana Radonjic
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Chemical Characteristics, and Effect of Inulin Extracted from Artichoke (Cynara scolymus L.) Root on Biochemical Properties of Synbiotic Yogurt at the End of Fermentation [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2018
The aim of this study was to produce synbiotic yogurt using different inulin levels (0, 1 and 2%) and probiotic bacteria. Inulin in two forms commercial and extracted from artichoke root was prepared, and chemical and sensory evaluation were performed ...
Jalal Ehsani   +3 more
doaj  

Separate effects of background and illumination on lightness [PDF]

open access: yesPsihologija, 2007
Four experiments attempted to establish an effect of context on lightness. Lightness is one of the dimensions of color and it varies from black to white. Most of our stimuli were inspired by simultaneous lightness contrast illusion. First two experiments
Zdravković Sunčica
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

Luminance gradient configuration determines perceived lightness in a simple geometric illusion

open access: yesFrontiers in Human Neuroscience, 2014
Accurate perception of surface reflectance poses a significant computational problem for the visual system. The amount of light reflected by a surface is affected by a combination of factors including the surface’s reflectance properties and illumination
Maria ePereverzeva, Scott O. Murray
doaj   +1 more source

A Neural Network Model of 3-D Lightness Perception [PDF]

open access: yes, 1995
A neural network model of 3-D lightness perception is presented which builds upon the FACADE Theory Boundary Contour System/Feature Contour System of Grossberg and colleagues.
Pessoa, Luiz, Ross, William
core   +1 more source

Solar sail orbits at artificial Sun-Earth libration points [PDF]

open access: yes, 2005
In this Note a new family of solar sail orbits will be investigated in the sun-Earth circular restricted three-body problem. It will be shown that periodic orbits can be developed that are displaced above or below the plane of the restricted three-body ...
Colin R. McInnes   +2 more
core   +1 more source

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