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Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
(2013-06-01)
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...
On the elastic wave equation in weakly anisotropic VTI media
(Oxford Univ PressOxfordInglaterra, 2013)
Spatial-temporally resolved high-frequency surface acoustic waves on silicon investigated by femtosecond spectroscopy
(American Institute Of Physics, 2012-06)
Various types of surface acoustic waves are generated by femtosecond pulses on bulk silicon with aluminium stripe transducers. Rayleigh and leaky longitudinal surface acoustic wave modes are detected in the time domain for ...
Ion-acoustic waves triggered by left-hand polarized finite-amplitude waves propagating in the beam direction
(Blackwell Publishing Ltd, 2006)
Nonlinear ion-acoustic like waves triggered by large-amplitude circularly polarized waves propagating in the direction of a proton beam are studied. The properties are strongly dependent on the nature of the large-amplitude ...
Ion acoustic-like waves triggered by nonlinear circularly polarized waves in the presence of an alpha particle beam
(Blackwell, 2006)
We consider a fast solar wind-type plasma consisting of electrons, a protons background, and a much more tenuous alpha particle beam. It is shown that such system is unstable against ion acoustic-like waves triggered by ...
Diamond-Based Thin Film Bulk Acoustic Wave Resonator for Biomedical Applications
(IOP Publishing, 2013)
Nowadays it is in constant growing the development of thin film bulk acoustic resonators. If the piezoelectric material is going to be implanted in the human body, an important requirement is the biocompatibility of ...
Anisotropic complex Padeacute hybrid finite-difference depth migration
(Soc Exploration GeophysicistsTulsaEUA, 2010)
Acoustic fields of acid suspensions containing cassava bagasse: Influence of physical properties on acoustic attenuation
(2021-06-01)
The effects produced by high-intensity ultrasound application during the acid pretreatment of biomass can enhance its later conversion into bioethanol. Therefore, it is interesting to evaluate how residues, such as cassava ...
Study of thresholds to burning in surface grinding process
(2005-04-01)
This work aims at finding out the threshold to burning in surface grinding process. Acoustic emission and electric power signals are acquired from an analog-digital converter and processed through algorithms in order to ...
Analytical study of the acoustic field in a spherical resonator for single bubble sonoluminescence
(Acoustical Society of America Institute of Physics, 2009-09)
The acoustic field in the liquid within a spherical solid shell is calculated. The proposed model takes into account Stoke?s wave equation in the viscous fluid, the membrane theory to describe the solid shell motion and the ...