Results 151 to 160 of about 837,361 (340)
Design of ultrasonic probes for medical diagnostics
Archives of Acoustics, 2014 The Mason's equivalent circuit of the piezoelectric transducer is modified in order to investigate separately the influence of parameters of piezoelectric material as well as electrical and acoustical elements applied in the ultrasonic probe.
G. ŁYPACEWICZ, E. DURIASZ
doaj
The control of moving microbubbles by ultrasonic wave and electric field
, 2023 Yasuhiro KUSAKA, Shuya YOSHIOKA
openalex +1 more source
Advanced Functional Materials, EarlyView.A solvent‐free mechanochemistry‐enabled supramolecular engineering strategy is developed to directly synthesize covalent‐interconnected two‐dimensional atomic‐layered carbon nitride nanosheets photocatalyst, bypassing conventional top‐down exfoliation requirements.
Fanglei Yao +7 more
wiley +1 more source
Noninvasive evaluation of the elasticity of common carotid artery wall
Archives of Acoustics, 2014 The elasticity of common carotid arteries was examined on the basis of noninvasive ultrasonic measurements of the diameter of the carotid artery and the systlic and diastolic pressures as determined by a cuff on the brachial artery. The measurements were
T. POWAŁOWSKI, Z. TRAWIŃSKI
doaj
On the directionality of membrane coupled Helmholtz resonators under open air conditions
Scientific ReportsControlling the absorption and diffusion of sound in the audible range constitutes an exciting field of research. Acoustic absorbers and diffusers perform extraordinarily well at high frequencies with sizes comparable to the wavelength of the working ...
R. Domingo-Roca +3 more
doaj +1 more source
Concepts for interrelating ultrasnic attenuation, microstrucutre and fracture toughness in polycrystalline solids [PDF]
Conceptual models are advanced for explaining and predicting empirical correlations found between ultrasonic measurements and fracture toughness of polycrystalline solids.
Vary, A.
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Advanced Functional Materials, EarlyView.A miniaturized mechano‐acoustic sensor is developed using an electrospun PVDF nanomesh as the diaphragm in a capacitive sensor structure. Unlike conventional nanomesh‐based sensors, it achieves high linear sensitivity, a broad and flat frequency response, and a compact form factor.
Jeng‐Hun Lee +8 more
wiley +1 more source
Design principles of transducers with matching layers based on admittance measurements
Archives of Acoustics, 2014 Basing on modified Mason's equivalent circuit of an acoustic probe the authors carried out the computation of admittances and pulses reflected from the ideal reflector immersed in water.
G. ŁYPACEWICZ, E. DURIASZ
doaj
Intravascular ultrasonic imaging.
Texas Heart Institute journal, 1990 Because conventional imaging methods are inadequate for evaluating human coronary arteries in vivo, an intravascular ultrasonic imaging catheter was developed that allows the arterial wall to be studied in cross-section from within the artery. The catheter incorporates a mechanically rotating 20-MHz transducer, which is designed so that the ringdown ...
Tobis, JM +10 more
openaire +3 more sources