Results 31 to 40 of about 12,784 (202)

Effect of Dispersed Particle Concentration on Photoacoustic Flowmetry Using Low-Frequency Transducers

Metrology
Photoacoustic (PA) velocimetry offers a promising solution to the limitations of conventional techniques for measuring blood flow velocity. Given its moderate penetration depth and high spatial resolution, PA imaging is considered suitable for measuring ...
Haruka Tsuboi, Taichi Kaizuka, Katsuaki Shirai   +2 more
doaj   +1 more source

A novel imaging technique to evaluate airflow characteristics in the upper airway of an obstructive sleep apnea patient

Clinical Case Reports, 2017
Key Clinical Message We report about a novel imaging technique for airflow analysis, particle image velocimetry (PIV), used in a moderate obstructive sleep apnea (OSA) patient.
Hui Chen, Ghizlane Aarab, Jian‐wei Liu, Yong‐liang Yu, Jing Guo, Paul F. van derStelt, Frank Lobbezoo   +6 more
doaj   +1 more source

Application of High-Speed Self-Aligned Focusing Schlieren System for Supersonic Flow Velocimetry

Aerospace
A self-aligned focusing schlieren (SAFS) system combines the field of view of a conventional schlieren system with the defocus blur of a focusing schlieren system away from the object plane.
Philip A. Lax, Sergey B. Leonov
doaj   +1 more source

Realization of Multitone Continuous Wave Lidar

IEEE Photonics Journal, 2019
We have developed a multitone modulated continuous wave (MTCW) Lidar system made of a CW laser with multiple fixed RF tones for a high precision range finding and velocimetry.
Rasul Torun, Mustafa M. Bayer, Imam U. Zaman, Jose E. Velazco, Ozdal Boyraz   +4 more
doaj   +1 more source

An Evaluation of Image Velocimetry Techniques under Low Flow Conditions and High Seeding Densities Using Unmanned Aerial Systems

Remote Sensing, 2020
Image velocimetry has proven to be a promising technique for monitoring river flows using remotely operated platforms such as Unmanned Aerial Systems (UAS).
Sophie Pearce, Robert Ljubičić, Salvador Peña-Haro, Matthew Perks, Flavia Tauro, Alonso Pizarro, Silvano Fortunato Dal Sasso, Dariia Strelnikova, Salvatore Grimaldi, Ian Maddock, Gernot Paulus, Jasna Plavšić, Dušan Prodanović, Salvatore Manfreda   +13 more
doaj   +1 more source

Patient‐Derived 3D Heart‐On‐a‐Chip Model of Dilated Cardiomyopathy With Embedded Bead‐Based Mapping of Tissue Contractility

Advanced Healthcare Materials, EarlyView.
A heart‐on‐a‐chip model of dilated cardiomyopathy is developed from patient‐derived induced pluripotent stem cells. The model recapitulates key disease phenotypes and enables functional assessment through integrated bead‐based tracking and pillar deflection measurements.
Ali Mousavi, Ludovic Mouttet, Shihao Cui, Yasaman Hekmatnia, Mehran Mottahedi, Ida Derish, Naimeh Rafatian, Mark Aurousseau, Gregor Andelfinger, Renzo Cecere, Houman Savoji   +10 more
wiley   +1 more source

Photoactive Tweezers

Advanced Materials, EarlyView.
A photoactive tweezers system based on photoactive colloids is developed and systematically investigated in this study. Through experimental and theoretical methods, we demonstrate that the photoredox reaction catalyzed by a dye‐sensitized TiO2 particle generates a strong positive phototaxis, enabling self‐entrapment in the beam center.
Jingyuan Chen, Qingxin Guo, Shiwei Zhang, Donghao Cui, Changjin Wu, Pei Xu, Wei Wang, Kai Lou, Binglin Zeng, Jinyao Tang   +9 more
wiley   +1 more source

The Flow Characteristics of an Evaporating Ethanol Water Mixture Droplet on a Glass Substrate

Journal of Thermal Science and Technology, 2012
Droplet evaporation has attracted much interest recently, being relevant to a wide range of biological and technological applications. The underlying mechanisms for this phenomenon are still poorly understood.
Yoshinori HAMAMOTO, John R. E. CHRISTY, Khellil SEFIANE   +2 more
doaj   +1 more source

A 3D Human Bone and Bone Marrow‐on‐a‐Chip Model for In Vitro Bone Remodeling and Immune Cell Maintenance

Advanced Science, EarlyView.
This study presents a human Bone (and Bone Marrow)‐on‐a‐Chip model based on native human bone scaffolds and autologous cells. Dynamic perfusion and sequential cell seeding replicate the physiological bone remodeling process in vitro, enabling the long‐term culture of functional, mature bone marrow immune subpopulations.
Nina Stelzer, Melanie‐Jasmin Ort, Kristian Händler, Emely Bortel, Ioanna Maria Dimitriou, Martin Textor, Georg N. Duda, Janosch Schoon, Uwe Marx, Uwe Kornak, Annika Winter, Bernhard Hesse, Stefanie Donner, Sebastian Hardt, Oliver Klein, Simon Reinke, Malte Spielmann, Sven Geißler   +17 more
wiley   +1 more source

Helioseismology in a bottle: modal acoustic velocimetry

New Journal of Physics, 2014
Measurement of the differential rotation of the Sunʼs interior is one of the great achievements of helioseismology, providing important constraints for stellar physics. The technique relies on observing and analyzing rotationally-induced splittings of p -
Santiago Andrés Triana, Daniel S Zimmerman, Henri-Claude Nataf, Aurélien Thorette, Vedran Lekic, Daniel P Lathrop   +5 more
doaj   +1 more source