Clustering ultrasonic waves propagation time: A hierarchical polynomial semiparametric approach

2021 ◽  
Author(s):  
Daiane Aparecida Zuanetti ◽  
Rosineide Fernando da Paz ◽  
Talisson Rodrigues ◽  
Esequiel Mesquita
Keyword(s):  
Ultrasonic Waves ◽  
Propagation Time ◽  
Semiparametric Approach ◽  
Waves Propagation

Finite difference simulation and experimental study of ultrasonic waves propagation in inhomogeneous piezoelectrically active composites

2019 ◽  
Vol 539 (1) ◽  
pp. 63-70
Author(s):  
M. A. Lugovaya ◽  
E. I. Petrova ◽  
I. A. Shvetsov ◽  
S. A. Shcherbinin ◽  
A. N. Rybyanets
Keyword(s):  
Experimental Study ◽  
Finite Difference ◽  
Ultrasonic Waves ◽  
Waves Propagation

The study of volume ultrasonic waves propagation in the gas-containing iron ore pulp

Ultrasonics ◽  
2015 ◽  
Vol 56 ◽  
pp. 340-343 ◽  
Author(s):  
V. Morkun ◽  
N. Morkun ◽  
A. Pikilnyak
Keyword(s):  
Iron Ore ◽  
Ultrasonic Waves ◽  
Waves Propagation

Effect of Pre-reacted Glass-ionomer Filler Extraction Solution on Demineralization of Bovine Enamel

2014 ◽  
Vol 39 (2) ◽  
pp. 159-165 ◽  
Author(s):  
K Asano ◽  
R Kawamoto ◽  
M Iino ◽  
T Fruichi ◽  
K Nojiri ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Solution ◽  
Artificial Saliva ◽  
Ultrasonic Waves ◽  
Ultrasound Measurement ◽  
Propagation Time ◽  
Glass Ionomer ◽  
Lactic Acid Solution ◽  
Bovine Enamel ◽  
Transmission Velocity

SUMMARY Objective To determine the effect of pre-reacted glass-ionomer (PRG) filler extraction solution on the demineralization of bovine enamel by measuring changes in the ultrasound transmission velocity. Methods The specimens were prepared by cutting bovine teeth into enamel blocks. The specimens were immersed in buffered lactic acid solution for 10 minutes twice a day, and then stored in artificial saliva. Other specimens were stored in PRG filler extraction solution for 10 minutes, followed by 10-minute immersion in the buffered lactic acid solution twice a day. The propagation time of longitudinal ultrasonic waves was measured by a pulser receiver. Six specimens were used for each condition, and analyses of variance followed by Tukey tests (α=0.05) were done. Results No changes in sonic velocity were found for specimens stored in the PRG filler extraction solution, indicating that the PRG extraction solution had an effect on inhibiting the demineralization of bovine enamel. Conclusions The results obtained with the use of an ultrasound measurement technique suggested that PRG filler extraction solution has the ability to prevent demineralization of enamel.

scholarly journals Directional Ultrasound Source for Solid Materials Inspection: Diffraction Management in a Metallic Phononic Crystal

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6148
Author(s):  
Hossam Selim ◽  
Rubén Picó ◽  
Jose Trull ◽  
Miguel Delgado Prieto ◽  
Crina Cojocaru
Keyword(s):  
Elastic Waves ◽  
Phononic Crystal ◽  
Target Object ◽  
Ultrasonic Waves ◽  
Proof Of Concept ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Focusing Effect ◽  
Waves Propagation ◽  
Non Destructive

In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an “ultrasonic lens”, providing self-collimation or focusing effect at a certain distance from the crystal output. We implement this directional propagation in the design of a coupling device capable to control the directivity or focusing of ultrasonic waves propagation inside a target object. These effects are robust over a broad frequency band and are preserved in the propagation through a coupling gel between the “ultrasonic lens” and the solid target. These results may find interesting industrial and medical applications, where the localization of the ultrasonic waves may be required at certain positions embedded in the object under study. An application example for non-destructive testing with improved results, after using the ultrasonic lens, is discussed as a proof of concept for the novelty and applicability of our numerical simulation study.

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