Results 51 to 60 of about 105,814 (313)
Manual of Transcranial Doppler Ultrasonography
Korean Journal of Clinical Laboratory ScienceTranscranial Doppler (TCD) ultrasound is a crucial non-invasive tool for assessing cerebral blood flow and is widely used to diagnose and monitor cerebrovascular diseases.
Ho Tae JEONG, Soo Na JEON, Sol HAN
doaj +1 more source
Research Advances on the Rotational Doppler Effect of Vortex Electromagnetic Waves
Leida xuebao, 2021 Traditional radars can detect moving targets using the Doppler effect. However, traditional radars have shadow areas in detecting the angular motion of the rotating targets.
Zhongyi GUO +3 more
doaj +1 more source
Advanced Materials, EarlyView.Solid‐state batteries promise high energy density and safety for electric vehicles. This study examines the densification of slurry‐casted Li₆PS₅Cl separator tapes, highlighting the role of particle size distribution and uni‐axial pressure. Wet milling refines particles while preserving conductivity, and a critical compaction threshold leads to ...
Quoc‐Anh Tran +14 more
wiley +1 more source
High Aspect Ratio, Superconducting Vacuum Gap Capacitor NEMS with Plate Distances Down to 32 nm
Advanced Materials Technologies, EarlyView.Fabrication of aluminium vacuum gap capacitor based NEMS is investigated with a free to move top electrode. To avoid collapse of the top electrode vertical stress gradient is controlled through sputter parameters. The result is wafer‐level high‐yield fabrication of vacuum gap capacitors with radii between 7 µm and 30 µm and integrated piezoactuators. A
Ioan Ignat, Daniel Platz, Ulrich Schmid
wiley +1 more source
A Theoretical-Study of the Scattering of Ultrasound from Blood [PDF]
Modeling, Identification and Control, 1981 A theoretical treatment of the scattering of ultrasound from blood is given, assuming that the blood behaves essentially as a continuum. The scattering then arises from fluctuations in the mass density and compressibility of the blood, which is caused by
Bjørn A.J. Angelsen
doaj +1 more source
Advanced Materials Technologies, EarlyView.This research presents an easy to fabricate, low‐cost, flexible piezoresistive deformation sensor comprised of a carbon nanotube, few‐layer graphene, and polydimethylsiloxane composite. The sensor detects deformations and vibrations up to 600 Hz with 0.1% strain sensitivity from stiff and soft targets in dry and wet environments.
Sinan Candan +9 more
wiley +1 more source
Известия высших учебных заведений России: Радиоэлектроника, 2018 Narrowband approximation of Doppler effect by a frequency shift is inappropriate for some problems of radiolocation, hydro acoustics or passive location.
I. V. Gogolev
doaj +1 more source
Flow Analysis in Pathological Microvascular Models by Ultrasound Localization Microscopy
Advanced Materials Technologies, EarlyView.This study presents a new platform combining ultrasound localization microscopy with biomimetic gelatin phantoms to analyze flow dynamics in small vessels with narrowing or obstructions. Using microbubble tracking, the method enables high‐resolution velocity mapping in 100–500 µm channels, revealing flow changes in pathological microvascular conditions
Yarin Gershman +3 more
wiley +1 more source
On the Doppler Effect in a Medium
, 1963 This research was supported by the U. S. Air Force through the Air Force Office of Scientific Research of the Air Research and Development Command, under Contract No. AF49(638)-1266. Reproduction in whole or in part is permitted for any purpose of the United States Government. The author is grateful to Professor C. H. Papas for his continued guidance
openaire +3 more sources
Ultrasensitive and Reliable Diamond MEMS Magnetic Force Sensor with 3D Imaging at Room Temperature
Advanced Materials Technologies, EarlyView.A magnetic force sensor by integrating a single‐crystal diamond MEMS resonator with a magnetic particle, achieving exceptional sensitivity, stability, and reliability at room temperature is demonstrated. This simple yet robust design enables precise detection of magnetic field gradients and supports 3D magnetic force imaging, paving the way for next ...
Zilong Zhang +7 more
wiley +1 more source