Results 31 to 40 of about 1,434,741 (177)

Characterizing maser polarization: effects of saturation, anisotropic pumping and hyperfine structure [PDF]

open access: yes, 2019
The polarization of masers contains information on the magnetic field strength and direction of the regions they occur in. Many maser polarization observations have been performed over the last 30 years.
Lankhaar, Boy, Vlemmings, Wouter
core   +2 more sources

In-situ Detection Method for Microplastics in Water by Polarized Light Scattering

open access: yesFrontiers in Marine Science, 2021
Microplastics (MPs) have become the widespread contaminants, which raises concerns on their ecological hazards. In-situ detection of MP in water bodies is essential for clear assessment of the ecological risks of MPs.
Tong Liu   +11 more
doaj   +1 more source

Work costs and operating regimes for different manners of system-reservoir interactions via collision model

open access: yesNew Journal of Physics, 2022
In this work, we study effects of different types of system-reservoir interactions on work costs and operating regimes of thermal machines by considering a quantum system consisting of two subsystems embedded in both independent and common reservoirs ...
Ying Wang   +3 more
doaj   +1 more source

Polar Homology

open access: yesCanadian Journal of Mathematics, 2003
AbstractFor complex projective manifolds we introduce polar homology groups, which are holomorphic analogues of the homology groups in topology. The polar k-chains are subvarieties of complex dimension k with meromorphic forms on them, while the boundary operator is defined by taking the polar divisor and the Poincaré residue on it. One can also define
Khesin, B., Rosly, A.
openaire   +3 more sources

A three-dimensional degree of polarization based on Rayleigh scattering [PDF]

open access: yes, 2007
A measure of the degree of polarization for the three-dimensional polarization matrix (coherence matrix) of an electromagnetic field is proposed, based on Rayleigh scattering.
Alonso   +16 more
core   +3 more sources

A Search for Intrinsic Polarization in O Stars with Variable Winds [PDF]

open access: yes, 1999
New observations of 9 of the brightest northern O stars have been made with the Breger polarimeter on the 0.9~m telescope at McDonald Observatory and the AnyPol polarimeter on the 0.4~m telescope at Limber Observatory, using the Johnson-Cousins UBVRI ...
Coyne G. V.   +13 more
core   +2 more sources

Broadband and tunable terahertz absorption based on ethanol-treated carbon nanotube sponges

open access: yesResults in Physics, 2022
To eliminate the undesired terahertz (THz) interference and echo, broadband and tunable THz absorbing devices are urgently needed. Herein, we report a simple method to obtain an active THz absorption performance by ethanol-treated carbon nanotube sponges
Shi-Tong Xu   +4 more
doaj   +1 more source

Majorization and Measures of Classical Polarization in Three Dimensions [PDF]

open access: yes, 2014
There has been much discussion in the literature about rival measures of classical polarization in three dimensions. We gather and compare the various proposed measures of polarization, creating a geometric representation of the polarization state space ...
Gamel, Omar, James, Daniel F. V.
core   +1 more source

Mueller Matrix Imaging Optimized by Uniform Illumination

open access: yesFrontiers in Physics, 2022
In this study, we present a flat-field Mueller matrix imaging system to reduce the reconstruction error caused by critical illumination. This study demonstrates that the signal-to-noise ratio (SNR) of the reconstructed images is improved by about eight ...
Wei Guo   +7 more
doaj   +1 more source

Polarization resolved angular patterns in nematic liquid crystal cells [PDF]

open access: yes, 2006
We study the angular structure of polarization of light transmitted through a nematic liquid crystal (NLC) cell by theoretically analyzing the polarization state as a function of the incidence angles.
Alexei D Kiselev   +23 more
core   +2 more sources

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