Results 21 to 30 of about 29,054 (216)

Grid turbulence studied by Particle Image Velocimetry [PDF]

open access: yesEPJ Web of Conferences, 2022
We studied the grid-generated turbulence by using Particle Image Velocimetry (PIV) technique. We test on this already well studied flow the new ways of analyzing spatially resolved PIV data, such as the spatial spectra and structure functions. We compare
Duda Daniel   +3 more
doaj   +1 more source

High-Resolution Projectile Velocity And Acceleration Measurement Using Photonic Doppler Velocimetry [PDF]

open access: yes, 2009
This paper describes the new photonic Doppler velocimetry (PDV) technique for measuring time-resolved projectile velocity and acceleration profiles for full flight of the launch package in a two-stage light-gas gun (LGG).
Levinson, S., Satapathy, S.
core   +1 more source

A sex specific approach of ophthalmic and middle cerebral arteries Doppler in smokers

open access: yesScientific Reports, 2021
Vascular dysfunctions can progress and lead to stroke and cardiovascular disease, especially in smokers. The presence of particular vascular changes according to sex has been described and they can be identified by the Doppler method.
Maria Marta B. M. Paes   +2 more
doaj   +1 more source

Acute fetal anemia diagnosed by middle cerebral artery Doppler velocimetry in stage v twin-twin transfusion syndrome. [PDF]

open access: yes, 2011
In stage V twin-twin transfusion syndrome (TTTS), up to 50% of surviving twins die or experience permanent disabilities, likely due to acute intertwin hemorrhage resulting in sudden severe anemia of the survivor.
Friedrich, Esther   +3 more
core   +2 more sources

Photonic doppler velocimetry [PDF]

open access: yes, 1999
We are developing a novel fiber-optic approach to laser Doppler velocimetry as a diagnostic for high explosives tests. Using hardware that was originally developed for the telecommunications industry, we are able to measure surface velocities ranging from centimeters per second to kilometers per second.
Lowry, M. E.   +4 more
openaire   +2 more sources

Doppler changes as the earliest parameter in fetal surveillance to detect fetal compromise in intrauterine growth-restricted fetuses [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo, 2016
Introduction. It is estimated that 3-10% of infants are growth restricted. Growth disturbances may have long-term issues. Doppler allows insight into the fetal response to intrauterine stress. Objective. The aim of this study was to detect fetal
Bansal Saloni   +3 more
doaj   +1 more source

Triplex Doppler evaluation of the testes in dogs of different sizes

open access: yesPesquisa Veterinária Brasileira, 2014
This study aimed to assess whether there are differences in Doppler velocimetry parameters between different sizes. Twenty dogs were equally divided into small and large groups used in this study.
Mírley B. Souza   +7 more
doaj   +1 more source

Investigation by laser doppler velocimetry of the effects of liquid flow rates and feed positions on the flow patterns induced in a stirred tank by an axial-flow impeller [PDF]

open access: yes, 2002
The (ow patterns established in a continuously-fed stirred tank, equipped with a Mixel TT axial-(ow impeller, have been investigated bylaser Doppler velocimetry, for a high and a low value of mean residence time—mixing time ratio.
Bertrand, Joël   +3 more
core   +2 more sources

Laser Doppler Velocimetry for Joint Measurements of Acoustic and Mean Flow Velocities : LMS-based Algorithm and CRB Calculation

open access: yes, 2009
This paper presents a least mean square (LMS) algorithm for the joint estimation of acoustic and mean flow velocities from laser doppler velocimetry (LDV) measurements.
Degroot, Anne   +3 more
core   +1 more source

A velocidade sistólica máxima aumenta na artéria cerebral média de fetos normais da 22.a a 38.a semana de gestação.

open access: yesActa Médica Portuguesa, 2006
To assess peak systolic velocity values in middle cerebral artery (PSMCA) of normal fetuses from 22nd to 38th week of gestation.We made a prospective study of 33 healthy fetuses from 22nd to 38th to determine peak systolic velocity by Doppler velocimetry.
A Gadelha-Costa   +3 more
doaj   +1 more source

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