Results 41 to 50 of about 18,864 (213)

Rotational Doppler velocimetry to probe the angular velocity of spinning microparticles [PDF]

, 2014
Laser Doppler velocimetry is a technique used to measure linear velocity, ranging from that of exhaust gases to blood flow. A rotational analog of laser Doppler velocimetry was recently demonstrated, using a rotationally symmetric interference pattern to
Barnett, S. M., Gibson, G. M., Lavery, M. P. J., Lee, M. P., Padgett, M. J., Phillips, D. B., Simpson, S. H., Speirits, F. C.   +7 more
core   +1 more source

Ideal gas behavior of a strongly-coupled complex (dusty) plasma [PDF]

, 2013
In a laboratory, a two-dimensional complex (dusty) plasma consists of a low-density ionized gas containing a confined suspension of Yukawa-coupled plastic microspheres.
Durniak, Céline, Griffith, Elias J., Oxtoby, Neil P., Ralph, Jason F., Samsonov, Dmitry   +4 more
core   +2 more sources

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Beyond Janus Geometry: Characterization of Flow Fields around Nonspherical Photocatalytic Microswimmers

Advanced Science, 2022
Catalytic microswimmers that move by a phoretic mechanism in response to a self‐induced chemical gradient are often obtained by the design of spherical janus microparticles, which suffer from multi‐step fabrication and low yields.
Sandra Heckel, Clemens Bilsing, Martin Wittmann, Thomas Gemming, Lars Büttner, Jürgen Czarske, Juliane Simmchen   +6 more
doaj   +1 more source

General Defocusing Particle Tracking: fundamentals and uncertainty assessment

, 2020
General Defocusing Particle Tracking (GDPT) is a single-camera, three-dimensional particle tracking method that determines the particle depth positions from the defocusing patterns of the corresponding particle images.
Barnkob, Rune, Rossi, Massimiliano
core   +1 more source

Elastomeric Micro‐Balloons for Remote Control of Cerebral Blood Flow and Real‐Time In vivo Imaging of Rodent Brain Response to Hypoperfusion

Advanced Materials, EarlyView.
This study reports the fabrication of MRI‐compatible elastomeric micro‐balloons via a multi‐step bubble casting process, where the monolithic elastomeric wall is selectively stiffened for reversible and controlled inflation and elasticity, depending on the target vessels for graded occlusion of cerebral arteries.
Jong Bin Kim, Jinghui Wang, Yinding Chi, Jingxian Wu, Alicia Ng, Guanda Qiao, Honglin Tan, Miroslaw Janowski, Piotr Walczak, Yajie Liang, Shu Yang   +10 more
wiley   +1 more source

New Algorithms in Particle Tracking Velocimetry

Journal of the Visualization Society of Japan, 1999
New algorithms have been implemented and tested for the use in particle tracking velocimetry (PTV). These new algorithms have been introduced mainly in the part of particle tracking itself, but as well as in the preceding part of individual particles extraction.
Kazuo Ohmi, Hang Yu Li
openaire   +2 more sources

Video-rate 3D Particle Tracking with Extended Depth-of-field in Thick Biological Samples [PDF]

, 2017
We present a single-aperture 3D particle localisation and tracking technique with a vastly increased depth-of-field without compromising optical resolution and throughput. Flow measurements in a FEP capillary and a zebrafish blood vessel are demonstrated
Carles, Guillem, Harvey, Andrew R., Taylor, Jonathan, Zammit, Paul, Zhou, Yongzhuang, Zickus, Vytautas   +5 more
core   +1 more source

Matrix Viscoelasticity Regulates Dendritic Cell Migration and Immune Priming

Advanced Materials, EarlyView.
Matrix viscoelasticity is a key mechanical feature of the tumor microenvironment but remains poorly understood in immune regulation. Here, we develop a tunable collagen platform to decouple viscoelasticity from stiffness and show that slow‐relaxing matrices constrain dendritic cell migration by limiting actomyosin‐driven matrix remodeling, thereby ...
Wei‐Hung Jung, Emie Humann, Joshua M. Price, Yoav Binenbaum, Azra Haseki, Sanjana Iyer, David J. Mooney   +6 more
wiley   +1 more source

Micro-Scale Particle Tracking: From Conventional to Data-Driven Methods

Micromachines
Micro-scale positioning techniques have become essential in numerous engineering systems. In the field of fluid mechanics, particle tracking velocimetry (PTV) stands out as a key method for tracking individual particles and reconstructing flow fields ...
Haoyu Wang, Liu Hong, Leonardo P. Chamorro   +2 more
doaj   +1 more source