Results 11 to 20 of about 7,781 (181)

Understanding Atrial Fibrillation Complexity Through the Lens of Turbulence Dynamics: Implications for Treatment Strategies. [PDF]

open access: yesJ Cardiovasc Electrophysiol
ABSTRACT Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. Its incidence increases significantly with age and has become a major global public health issue. Although research into the mechanisms of AF has spanned over a century‐ranging from the reentry theory to the rotor hypothesis‐none of these
Chu X, Jiang X, Qiao Q, Wang X, Ye H.
europepmc   +2 more sources

Fiber-coupling efficiency of a Gaussian-beam in anisotropic non-Kolmogorov turbulence in the presence of random angular jitter

open access: yesResults in Physics, 2020
Increasing experimental evidence and theoretical results verify that the non-Kolmogorov property and anisotropy are both exhibited in the atmospheric turbulence.
Chao Zhai
doaj   +1 more source

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

open access: yesPhotonics, 2023
Satellite laser communication can achieve high-speed, high-precision, and high-security broadband communication without being constrained by the electromagnetic spectrum, which has attracted attention.
Xuewen Jiang, Yi Wang, Wangyue Lu
doaj   +1 more source

Effects of Background Turbulence on the Relaxation of Ion Temperature Anisotropy Firehose Instability in Space Plasmas

open access: yesUniverse, 2022
Turbulence in space plasmas usually exhibits an energy cascade in which large-scale magnetic fluctuations are dominated by non-linear MHD wave–wave interactions following a Kolmogorov-like power-law spectrum.
Roberto E. Navarro, Pablo S. Moya
doaj   +1 more source

Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence

open access: yesApplied Sciences, 2020
The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric
Bing Guan   +3 more
doaj   +1 more source

Average channel capacity in anisotropic atmospheric non-Kolmogorov turbulent medium

open access: yesOptics Communications, 2019
Abstract The average channel capacity of a free space optical (FSO) communication system running an intensity modulated Gaussian beam is examined in anisotropic non-Kolmogorov atmospheric weak turbulence based on Rytov variance. Results are obtained by employing the log-normal distribution of irradiance fluctuations corresponding to weak turbulence ...
Ata, Yalcin   +2 more
openaire   +2 more sources

Measurements of the Solid-body Rotation of Anisotropic Particles in 3D Turbulence [PDF]

open access: yes, 2014
We introduce a new method to measure Lagrangian vorticity and the rotational dynamics of anisotropic particles in a turbulent fluid flow. We use 3D printing technology to fabricate crosses (two perpendicular rods) and jacks (three mutually perpendicular ...
Kramel, Stefan   +4 more
core   +1 more source

Simulating non-Kolmogorov turbulence phase screens based on equivalent structure constant and its influence on simulations of beam propagation

open access: yesResults in Physics, 2017
Gaussian distribution is used to describe the power law along the propagation path and phase screen of the non-Kolmogorov turbulence is proposed based on the equivalent refractive-index structure constants.
Ming Chen   +5 more
doaj   +1 more source

Field correlation of flat-topped beams in anisotropic non-Kolmogorov turbulent atmosphere

open access: yesJournal of Modern Optics, 2018
Field correlation of flat-topped beams in anisotropic non-Kolmogorov turbulent atmosphere is formulated and evaluated. Larger anisotropic factor causes higher field correlations.
Yalçın Ata, Yahya Baykal
openaire   +2 more sources

Statistics of pressure and of pressure-velocity correlations in isotropic turbulence [PDF]

open access: yes, 2000
Some pressure and pressure-velocity correlation in a direct numerical simulations of a three-dimensional turbulent flow at moderate Reynolds numbers have been analyzed.
Arad I.   +13 more
core   +4 more sources

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