Results 31 to 40 of about 779,144 (306)

Polarized cells, polar actions

open access: yesJournal of Bacteriology, 1993
The recognition of polar bacterial organization is just emerging. The examples of polar localization given here are from a variety of bacterial species and concern a disparate array of cellular functions. A number of well-characterized instances of polar localization of bacterial proteins, including the chemoreceptor complex in both C. crescentus and E.
J R, Maddock, M R, Alley, L, Shapiro
openaire   +3 more sources

Broadband spectral shaping using nematic liquid crystal

open access: yesResults in Physics, 2019
We demonstrate what is, to our knowledge, the first implementation of nematic liquid crystal (LC) for spectral shaping of broadband light fields. A LC cell of several microns thickness is placed between a polarizer and an analyzer.
Bhaskar Kanseri   +2 more
doaj   +1 more source

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

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

The polarization properties of a tilted polarizer

open access: yesOptics Express, 2013
Polarizers are key components in optical science and technology. Thus, understanding the action of a polarizer beyond oversimplifying approximations is crucial. In this work, we study the interaction of a polarizing interface with an obliquely incident wave experimentally.
Korger, J.   +6 more
openaire   +4 more sources

A waveguide polarization toolset design based on mode beating [PDF]

open access: yes, 2011
A toolset of waveguide elements is examined, which can be combined to produce polarization functional devices in a single contiguous waveguide. In particular, waveguide implementations of an optical isolator and a polarization modulator are discussed ...
Hutchings, D.C.   +3 more
core   +1 more source

Design of Hollow Core Bragg Fibers for a Compact Fluorescence Sensing Scheme

open access: yesIEEE Photonics Journal, 2017
We propose a compact fluorescence sensing scheme based on hollow core Bragg fibers (HCBFs) that simultaneously serve as a sample cell, a collector, and a delivery channel for the desired fluorescence, as well as a filter for the residual excitation light
Liang Shang, Kunjie Zheng
doaj   +1 more source

Polarization Measurements and Evaluation Based on Multidimensional Polarization Indices Applied in Analyzing Atmospheric Particulates

open access: yesApplied Sciences, 2021
Online identification and characterization of suspended aerosols can provide a scientific basis for understanding aerosol transformations, quantitatively evaluating the impacts on air quality, public health, and the source apportionment of different ...
Riwei Liao   +7 more
doaj   +1 more source

Political polarization [PDF]

open access: yesProceedings of the National Academy of Sciences, 2007
Failures of government policies often provoke opposite reactions from citizens; some call for a reversal of the policy, whereas others favor its continuation in stronger form. We offer an explanation of such polarization, based on a natural bimodality of preferences in political and economic contexts and consistent with Bayesian rationality.
Dixit, Avinash, Weibull, Jörgen
openaire   +5 more sources

Evaluating Tissue Mechanical Properties Using Quantitative Mueller Matrix Polarimetry and Neural Network

open access: yesApplied Sciences, 2022
Evaluation of the mechanical properties of biological tissues has always been an important issue in the field of biomedicine. The traditional method for mechanical properties measurement is to perform in vitro tissue deformation experiments.
Changjiang Mi   +4 more
doaj   +1 more source

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