Results 21 to 30 of about 41,435 (217)

An investigation of the Eigenvalue Calibration Method (ECM) using GASP for non-imaging and imaging detectors [PDF]

open access: yes, 2015
Polarised light from astronomical targets can yield a wealth of information about their source radiation mechanisms, and about the geometry of the scattered light regions.
Hallinan, Gregg   +4 more
core   +3 more sources

Polarization singularities in the clear sky [PDF]

open access: yes, 2004
Ideas from singularity theory provide a simple account of the pattern of polarization directions in daylight. The singularities (two near the Sun and two near the anti-Sun) are points in the sky where the polarization line pattern has index +1/2 and the ...
Berry, M.V., Dennis, M.R., Lee, Jr, R.L.
core   +1 more source

Neuroarchitecture of the central complex in the Madeira cockroach Rhyparobia maderae: Pontine and columnar neuronal cell types

open access: yesJournal of Comparative Neurology, Volume 531, Issue 16, Page 1689-1714, November 2023., 2023
The central complex is an assemblage of highly interconnected neuropils spanning the midline of the insect brain. In the cockroach, five types of pontine neurons and 18 types of columnar neurons interconnect its subcompartments in a topographic manner and provide outputs to other areas of the brain. The data point to a key role of the cockroach central
Stefanie Jahn   +8 more
wiley   +1 more source

Celestial polarization patterns sufficient for Viking navigation with the naked eye: detectability of Haidinger's brushes on the sky versus meteorological conditions [PDF]

open access: yesRoyal Society Open Science, 2017
If a human looks at the clear blue sky from which light with high enough degree of polarization d originates, an 8-shaped bowtie-like figure, the yellow Haidinger's brush can be perceived, the long axis of which points towards the sun.
Gábor Horváth   +6 more
doaj   +1 more source

An analytical model for the celestial distribution of polarized light, accounting for polarization singularities, wavelength and atmospheric turbidity [PDF]

open access: yes, 2016
We present a computationally inexpensive analytical model for simulating celestial polarization patterns in variable conditions. We combine both the singularity theory of Dennis and Berry and the intensity model of Perez such that our single model ...
Fan, Zhiguo   +3 more
core   +2 more sources

Comparative Optical Analysis of Imprinted Nano‐, Micro‐ and Biotextures on Solar Glasses for Increased Energy Yield

open access: yesSolar RRL, Volume 7, Issue 13, July 2023., 2023
The omnidirectional antireflective properties of 12 different nano‐, micro‐, and bio‐inspired textures on solar glasses are compared, and critical texture parameters are identified. Based on the experimental reflectance data, the energy yield of bifacial solar modules with textured glasses is calculated.
Danbi Yoo   +9 more
wiley   +1 more source

Exploration of a Polarized Surface Bidirectional Reflectance Model Using the Ground-Based Multiangle Spectropolarimetric Imager [PDF]

open access: yes, 2012
Accurate characterization of surface reflection is essential for retrieval of aerosols using downward-looking remote sensors. In this paper, observations from the Ground-based Multiangle SpectroPolarimetric Imager (GroundMSPI) are used to evaluate a ...
Chipman, Russell A.   +8 more
core   +2 more sources

Neuronal activation in the geomagnetic responsive region Cluster N covaries with nocturnal migratory restlessness in white‐throated sparrows (Zonotrichia albicollis)

open access: yesEuropean Journal of Neuroscience, Volume 57, Issue 11, Page 1779-1788, June 2023., 2023
Left panel: We measured immediate‐early gene activation in Cluster N of white‐throated sparrows (Zonotrichia albicollis) in three conditions: nighttime migratory restless, daytime and nighttime resting. Birds in the nighttime migratory restlessness group had significantly greater numbers of ZENK‐labelled cells in Cluster N compared to both the daytime ...
Madeleine I. R. Brodbeck   +4 more
wiley   +1 more source

Design and Calibration of a Novel Bio-Inspired Pixelated Polarized Light Compass

open access: yesSensors, 2017
Animals, such as Savannah sparrows and North American monarch butterflies, are able to obtain compass information from skylight polarization patterns to help them navigate effectively and robustly.
Guoliang Han   +6 more
doaj   +1 more source

Determination of biogeochemical properties of marine particles using above water measurements of the degree of polarization at the Brewster angle [PDF]

open access: yes, 2007
Retrieval of biogeochemical parameters from remotely sensed data in optically complex waters such as those found in coastal zones is a challenging task due to the effects of various water constituents (biogenic, nonalgal and inorganic particles ...
Chami, Malik, McKee, David J.C.
core   +2 more sources

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