Results 11 to 20 of about 12,784 (202)

'DefocusTracker': A Modular Toolbox for Defocusing-based, Single-Camera, 3D Particle Tracking

open access: yesJournal of Open Research Software, 2021
The need for single-camera 3D particle tracking methods is growing, among others, due to the increasing focus in biomedical research often relying on single-plane microscopy imaging.
Rune Barnkob, Massimiliano Rossi
doaj   +1 more source

Optical Feedback Interferometry for Velocity Measurement of Parallel Liquid-Liquid Flows in a Microchannel

open access: yesSensors, 2016
Optical feedback interferometry (OFI) is a compact sensing technique with recent implementation for flow measurements in microchannels. We propose implementing OFI for the analysis at the microscale of multiphase flows starting with the case of parallel ...
Evelio E. Ramírez-Miquet   +5 more
doaj   +1 more source

The dependence of speckle contrast on velocity: a numerical study

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow.
van As Kevin   +4 more
doaj   +1 more source

UVP Measurement of Flow around a Baffle in a Rectangular Open Channel

open access: yesJournal of Fluid Science and Technology, 2009
The effect of an intermediate standing baffle on the structure of flow in a rectangular open channel has been successfully captured by an Ultrasonic Velocity Profiler (UVP).
Hamidreza JAMSHIDNIA, Yasushi TAKEDA
doaj   +1 more source

Development of a Hot-Wire Probe with Two Parallel Wires Placed Closely Together

open access: yesJournal of Fluid Science and Technology, 2009
We manufactured a new hot-wire probe with two parallel wires placed closely together for measuring a transitional boundary-layer flow. The main feature of this new probe is that it is much smaller than a conventional multi-sensor probe, such as an X-type
Naoki SEKIYA, Akira MATSUMOTO
doaj   +1 more source

OCT methods for capillary velocimetry [PDF]

open access: yesBiomedical Optics Express, 2012
TO DATE, TWO MAIN CATEGORIES OF OCT TECHNIQUES HAVE BEEN DESCRIBED FOR IMAGING HEMODYNAMICS: Doppler OCT and OCT angiography. Doppler OCT can measure axial velocity profiles and flow in arteries and veins, while OCT angiography can determine vascular morphology, tone, and presence or absence of red blood cell (RBC) perfusion.
Srinivasan, Vivek Jay   +6 more
openaire   +4 more sources

Flow rate measurement in aggressive conductive fluids

open access: yesEPJ Web of Conferences, 2014
Two non-contact experimental methods of flow rate measurements for aggressive conductive liquids are described. The techniques are based on electromagnetic forces and Faraday’s law: Lorentz force is induced inside moving conductive liquid under influence
Dubovikova Nataliia   +2 more
doaj   +1 more source

OpenOpticalFlow: An Open Source Program for Extraction of Velocity Fields from Flow Visualization Images

open access: yesJournal of Open Research Software, 2017
This paper describes OpenOpticalFlow, an open source optical flow program in Matlab for extraction of high-resolution velocity fields from various flow visualization images.
Tianshu Liu
doaj   +1 more source

Assessment of the potential of radiography and ultrasonography to record flow dynamics in cohesive sediments (mud)

open access: yesFrontiers in Earth Science, 2022
The possible use of both radiography and ultrasonography to visualise flow dynamics in cohesive sediments, also known as fluid mud, has been assessed. Ultimately, these techniques are intended to enable the application of Particle Image Velocimetry (PIV)
Bart Brouwers   +4 more
doaj   +1 more source

Adaptively monitoring streamflow using a stereo computer vision system [PDF]

open access: yesHydrology and Earth System Sciences, 2023
The gauging of free surface flows in waterways provides the foundation for monitoring and managing the water resources of built and natural environments.
N. R. Hutley   +7 more
doaj   +1 more source

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