نتایج جستجو برای: electromechanical coupling
تعداد نتایج: 158360 فیلتر نتایج به سال:
Anterior leaflet (AL) stiffening during isovolumic contraction (IVC) may aid mitral valve closure. We tested the hypothesis that AL stiffening requires atrial depolarization. Ten sheep had radioopaque-marker arrays implanted in the left ventricle, mitral annulus, AL, and papillary muscle tips. Four-dimensional marker coordinates (x, y, z, and t) were obtained from biplane videofluoroscopy at ba...
The flexoelectric effect is a coupling of polarization and strain gradient, which exists in a wide variety of materials and may lead to strong size-dependent properties at the nanoscale. Based on an extension to the classical beam model, this paper investigates the electromechanical coupling response of piezoelectric nanobeams with different electrical boundary conditions including the effect o...
A simple approach is presented for using bond-stretching and bond-bending modes to describe the static deformations of carbon nanotubes and related actuation effects. This approach allows us to analyze various phenomena in a unified way and to clarify their relationships. We discuss gap energy modulation by external strains, dimensional and torsional deformations caused by charge injection, and...
Objectıves: Many systemic diseases including cardiovascular disturbances have been described in psoriatic patients. In the previous studies, left ventricul (LV) subclinical myocadial dysfunction was reported in the psoriasis patients. To evaluate the effect of psoriasis on left atrial (LA) functions, which is an important determinant left ventricular filling, atrial electromechanical coupling a...
From an experimental point of view the outstanding development in the area of Lehmann-type effects is clearly the demonstration of the transmembrane transfer of water molecules across chiral liquid crystalline monolayers located at an air-liquid interface by Tabe and Yokoyama (2003). Tabe and Yokoyama observed the formation of patterns such target waves due to the phase winding of the director ...
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