Peristaltic pumps are mechanical displacement pumps that induce flow in a fluid-filled, flexiblewalled conduit through peristalsis – transport due to traveling contraction waves. While macroscale peristaltic pumps appear in a variety of configurations, micropumps based on this principle almost exclusively use the sequenced contraction and expansion of a small number of discrete actuators – typi...

. The proportionality between black hole entropy and area is derived from classical thermodynamics. The relationship between the classical and quantum formulas is shown to be similar to that of black body radiation. Classical ther-. modynamics is shown to imply certain characteristics for classical waves which are normally thought to be quantum mechanical in origin. Submitted to Physical Review D

By using a piezoelectric sensor, it was demonstrated that the visual evoked potential of a rat brain was accompanied by mechanical movements of the brain when it was excited. A phase of upward movement was found to be followed by a phase of downward movement. The largest upward movement was a rise in swelling pressure on the order of 100 μg, which was about 40 times larger than that of the bull...

This paper presents a semi-analytical model of shear wave scattering by a viscoelastic elliptical structure embedded in a viscoelastic medium, and its application in the context of dynamic elastography imaging. The commonly used assumption of mechanical homogeneity in the inversion process is removed introducing a priori geometrical information to model physical interactions of plane shear wave...

Submitted: Jun 21, 2013; Accepted: Jul 19, 2013; Published: Jul 25, 2013 Abstract: The article considers the possibility of using acoustic methods for non-destructive testing of strength and composition of building structures. Screening of multiple structures or structures with large geometrical dimensions (long tunnels, large area roofs, etc.) at first stage of testing the directly defined aco...

A unified scalar wave equation is formulated, which covers three-dimensional (3D) acoustic waves, 2D horizontally-polarised shear waves, 2D transverse-electric EM waves, 2D transverse-magnetic EM waves, 3D quantum-mechanical waves and 2D flexural waves. The homogeneous Green's function of this wave equation is a combination of the causal Green's function and its time-reversal, such that their s...

Background: Hemodialysis is a process of removing waste and excess fluid from blood when kidneys cannot function efficiently. It often involves diverting blood to the filter of the dialysis machin to be cleared of toxic substances. Fouling of pores in dialysis membrane caused by adhesion of plasma protein and other toxins will reduce the efficacy of the filtre.Objective: In This study, the infl...

The objective of this thesis is to develop a rigorous mathematical and numerical background for the extension and dissemination of imaging modalities by ultrasound, i.e. elastic waves, applied to the cardiac settings. The problems treated will concerned the topics of mathematical modeling, numerical analysis and scientific computing. More precisely we plan to define a linearized model for the p...

In this study, we consider the propagation of the Love-type wave in piezoelectric gradient covering layer on an elastic half-space having an imperfect interface between them. Dispersion relation has been obtained in the form of determinant for both electrically open and short cases. The effects of different material gradient coefficients of functionally graded piezoelectric material (FGPM) and ...