scholarly journals Student knowledge integration in learning mechanical wave propagation

2021 ◽  
Vol 17 (2) ◽  
Author(s):  
Li Xie ◽  
Qiaoyi Liu ◽  
Hui Lu ◽  
Qingyong Wang ◽  
Jing Han ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Knowledge Integration ◽  
Mechanical Wave ◽  
Student Knowledge

Ultrafast four-dimensional imaging of cardiac mechanical wave propagation with sparse optoacoustic sensing

2021 ◽  
Vol 118 (45) ◽  
pp. e2103979118
Author(s):  
Çağla Özsoy ◽  
Ali Özbek ◽  
Michael Reiss ◽  
Xosé Luís Deán-Ben ◽  
Daniel Razansky
Keyword(s):  
Wave Propagation ◽  
Cardiac Arrhythmias ◽  
Therapeutic Interventions ◽  
Model Organisms ◽  
Cardiac Mapping ◽  
Mechanical Wave ◽  
Heart Motion ◽  
Life Threatening ◽  
Phase Singularities ◽  
Small Model

Propagation of electromechanical waves in excitable heart muscles follows complex spatiotemporal patterns holding the key to understanding life-threatening arrhythmias and other cardiac conditions. Accurate volumetric mapping of cardiac wave propagation is currently hampered by fast heart motion, particularly in small model organisms. Here we demonstrate that ultrafast four-dimensional imaging of cardiac mechanical wave propagation in entire beating murine heart can be accomplished by sparse optoacoustic sensing with high contrast, ∼115-µm spatial and submillisecond temporal resolution. We extract accurate dispersion and phase velocity maps of the cardiac waves and reveal vortex-like patterns associated with mechanical phase singularities that occur during arrhythmic events induced via burst ventricular electric stimulation. The newly introduced cardiac mapping approach is a bold step toward deciphering the complex mechanisms underlying cardiac arrhythmias and enabling precise therapeutic interventions.

Electro-mechanical wave propagation in long bones

1981 ◽  
Vol 14 (1) ◽  
pp. 19-33 ◽  
Author(s):  
N. Güzelsu ◽  
S. Saha
Keyword(s):  
Wave Propagation ◽  
Long Bones ◽  
Mechanical Wave

scholarly journals Contribution to the modeling and the mechanical characterization of the subsoil in the LSBB environment

2019 ◽  
Vol 88 ◽  
pp. 06001
Author(s):  
Hamed Bouare ◽  
Arnaud Mesgouez ◽  
Gaëlle Lefeuve-Mesgouez
Keyword(s):  
Wave Propagation ◽  
Displacement Vector ◽  
Research Work ◽  
Compressional Wave ◽  
Low Noise ◽  
Point Of View ◽  
Propagation Model ◽  
Mechanical Wave ◽  
Imperfect Contact ◽  
Concrete Layer

The present research work aims at better characterizing the specific underground environment of the LSBB (Low Noise Inter-Disciplinary Underground Science and Technology, Rustrel, France) using mechanical wave propagation information. The LSBB experimental environment is characterized by a system of cylindrical galleries, some of them presenting a concrete layer. In the global project, three steps are considered : firstly the construction of an efficient forward mechanical wave propagation model to calculate the displacement vector and stress tensor components; secondly a sensitivity analysis to extract the pertinent parameters in the configurations and models under study (viscoelastic or poroviscoelastic media with potential anisotropy); and lastly an inversion strategy to recover some of the pertinent parameters. In this proposal, the first step, under progress, is described. The work carried out is in the continuity of the work presented by Yi et al. (2016) [1] who studied the harmonic response of a cylindrical elastic tunnel, impacted by a plane compressional wave, embedded in an infinite elastic ground. The interface between the rock mass and the linen is an imperfect contact modeled with two spring parameters, Achenbach and Zhu (1989) [2]. We choose a semi-analytical approach to calculate the two-dimensional displacement and stress fields in order to get a fast tool, from the numerical point of view. The main steps of the theoretical approach are : use of the Helmholtz decomposition, solving the wave equation based on the separation method and the expansion in Bessel function series in the harmonic domain. The harmonic results are validated by comparison with Yi et al. (2016) [1] and new ones are presented. Moreover, the transient regime case obtained with the use of a Fourier transform on the time variable, is under progress.

Mechanical wave propagation at phase and material interfaces of microstructures

2004 ◽  
Author(s):  
Jacqueline Vollmann ◽  
Dieter M. Profunser ◽  
Jozefien Goossens ◽  
Juerg Dual
Keyword(s):  
Wave Propagation ◽  
Mechanical Wave ◽  
Material Interfaces

Collisions and Mechanical Wave Propagation in Elastic Rods

2011 ◽  
Vol 39 (1) ◽  
pp. 17-30
Author(s):  
Claudio Fazio ◽  
Ivan Guastella ◽  
Giovanni Tarantino
Keyword(s):  
Wave Propagation ◽  
Elastic Rods ◽  
Mechanical Wave

scholarly journals Student conceptual resources for understanding mechanical wave propagation

2019 ◽  
Vol 15 (2) ◽  
Author(s):  
Lisa M. Goodhew ◽  
Amy D. Robertson ◽  
Paula R. L. Heron ◽  
Rachel E. Scherr
Keyword(s):  
Wave Propagation ◽  
Mechanical Wave ◽  
Conceptual Resources

scholarly journals Pedagogical models of surface mechanical wave propagation in various materials

2004 ◽  
Vol 25 (6) ◽  
pp. 745-753 ◽  
Author(s):  
L Bellomonte ◽  
C Fazio ◽  
R M Sperandeo-Mineo ◽  
G Tarantino
Keyword(s):  
Wave Propagation ◽  
Mechanical Wave ◽  
Pedagogical Models
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