نتایج جستجو برای: turbulence spot

تعداد نتایج: 73832  

Journal: :Optical and Quantum Electronics 2022

Presenting the intensity development of a circular Laguerre-cosh-Gaussian (CLChG) beam in turbulent mouse biological tissues is major goal current work. Using power spectrum refractive index from Schmitt's model and extended Huygens-Fresnel integral, propagation formula CLChG produced. In order to determine spreading properties studied beam, analytical expressions beam's effective size are cons...

A.R. Kamali Asl, H. Arabi, S.M. Aghamiri,

Background: A variable resolution X-ray (VRX) CT scanner provides a great increase in the spatial resolution. In VRX CT scanners, the spatial resolution of the system and its field of view (FOV) can be changed according to the object size. One of the main factors that limit the spatial resolution of VRX CT scanner is the effect of the X-ray focal spot. Materials and Methods: A theoreti...

Journal: :Physical review letters 2004
Annalisa Bracco Jost von Hardenberg Antonello Provenzale Jeffrey B Weiss Jim C McWilliams

The dynamics of passive Lagrangian tracers in three-dimensional quasigeostrophic turbulence is studied numerically and compared with the behavior of two-dimensional barotropic turbulence. Despite the different Eulerian properties of the two flows, the Lagrangian dynamics of passively advected tracers in three-dimensional quasigeostrophic turbulence is very similar to that of barotropic turbulen...

2014
R Hidema

In order to study the effects of extensional viscosities on turbulent drag reduction, experimental studies using two-dimensional turbulence have been made. Anisotropic structures and variations of energy transfer induced by polymers are considered. Polyethyleneoxide and hydroxypropyl cellulose having different flexibility, which is due to different characteristics of extensional viscosity, are ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
Matthias Bertram Alexander S Mikhailov

Effects of global delayed feedback on diffusion-induced turbulence are studied in a realistic model of catalytic oxidation of carbon monoxide on Pt(110). Spatiotemporal patterns resulting from numerical simulations of this model are identified and analyzed using a transformation into the phase and the amplitude of local oscillations. We find that chemical turbulence can be efficiently controlle...

2010
R. Ganesh W. W. LEE S. ETHIER J. MANICKAM

In a recent work, the effects of nonlinear self-consistent profile relaxation on the ITG turbulence in global delta-f particle simulations were studied [1] using Gyrokinetic Toroidal Code (GTC) [2]. In contrast to several other gyrokinetic turbulence models, GTC shows that the turbulence is insensitive to minute or drastic profile changes and reaches the similar flux levels irrespective of whet...

2012
Dae-Hong Kim Patrick J. Lynett

Related Articles Fundamental and subharmonic transition to turbulence in zero-pressure-gradient flat-plate boundary layers Phys. Fluids 24, 091104 (2012) Interaction of a converging spherical shock wave with isotropic turbulence Phys. Fluids 24, 085102 (2012) Droplet size distribution in homogeneous isotropic turbulence Phys. Fluids 24, 065101 (2012) Statistics and scaling of turbulence in a sp...

Journal: :Physical review letters 2005
Hong Zhang Zhoujian Cao Ning-Jie Wu He-Ping Ying Gang Hu

The occurrence of Winfree turbulence is currently regarded as one of the principal mechanisms underlying cardiac fibrillation. We develop a local stimulation method that suppresses Winfree turbulence in three-dimensional excitable media. We find that Winfree turbulence can be effectively suppressed by locally injecting periodic signals to only a very small subset (around some surface region) of...

Journal: :journal of agricultural science and technology 2011
b. sayinci s. bastaban j. sánchez-hermosilla

to determine the droplet characteristics of agricultural spray nozzles through water sensitive paper (wsp), the non-circular and overlapped spots appearing on the water sensitive paper surfaces are eliminated. in the conventional approach, the procedure is done according to the subjective self determined estimation of the operator. the objective of this study was to develop a practical alternat...

Journal: :journal of paramedical sciences 0
hakimeh zali proteomics research center, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran mostafa rezaei tavirani proteomics research center, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran farid azizi jalilian dept of clinical microbiology, faculty of medicine, ilam university of medical sciences, ilam reza khodarahmi medical biology research center, kermanshah university of medical sciences, kermanshah

because of the huge amounts of proteomic data and demand for new methods of laboratory analysis results, proteins collective analysis, in addition to taking less time, biostatistician assist at identification of new patterns in the data set. in this study, rat hippocampus proteome in normal and alzheimer's disease (ad) were analyzed by using proteomic techniques and bioinformatics’ analysis. pr...

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