Results 241 to 250 of about 53,806 (287)
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Electromechanical coupling and the conducted vasomotor response
American Journal of Physiology-Heart and Circulatory Physiology, 1995Conducted vasomotor responses are viewed as one mechanism that functionally integrates the microvasculature. It is hypothesized that the conducted vasomotor response is the result of an electrical current and its passive electrotonic spread along the length of a microvessel.
J, Xia, B R, Duling
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Chemico-electromechanical coupling in microporous media
Journal of Colloid and Interface Science, 2006We determine the macroscopic transport properties of isotropic microporous media by volume-averaging the local Nernst-Planck and Navier-Stokes equations in nonisothermal conditions. In such media, the excess of charge that counterbalances the charge deficiency of the surface of the minerals is partitioned between the Gouy-Chapman layer and the Stern ...
A, Revil, N, Linde
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On Electromechanical Coupling in Elastomers
Journal of Applied Mechanics, 2012Permittivity of electroactive elastomers alters during deformation. The influence of the permittivity alterations on the electrostriction of elastomers is studied in the present work. Particularly, acrylic elastomer VHB 4910 is considered. A polarization–electric field constitutive theory is introduced accounting for the influence of mechanical ...
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Electromechanical coupling in a biopolymer gel
Polymer, 1992Experiments on electromechanical coupling in aqueous gels of the polysaccharide agarose are described. The gels are prepared as free self-supporting discs between 1 and 4.5 mm thick immersed in water and in contact with a stainless-steel electrode system on a solid substrate.
T.J Lewis +2 more
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SYNCHRONIZATION OF TWO ELECTROMECHANICAL DEVICES WITH PARAMETRIC COUPLING
International Journal of Bifurcation and Chaos, 2008The study of synchronization of two electromechanical devices with parametric coupling, in their regular and chaotic states was investigated. It was observed that an analytical study based on the Floquet theory makes it possible to determine the coefficients of coupling, ensuring a complete synchronization.
A. Samankeu Tchana +2 more
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3D Cardiac Imaging of Electromechanical Coupling
1997A novel method for three dimensional (3D) electromechanical mapping of the heart is presented. The new method is based on utilizing special magnetically locatable catheters connected to a mapping and navigation system. The 3D electromechanical map of the chamber is reconstructed by sampling the location of the catheter tip throughout the cardiac cycle ...
L, Gepstein, S A, Ben-Haim
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Electromechanical Coupling of PZT Nanofibers
Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B, 2008This paper presented the results of electromechanical characterization of PZT nanofibers through applied mechanical strain and forced vibration. PZT nanofibers were fabricated by electrospinning process. Titanium film with ZrO2 layer was used to collect the nanofibers and also used as the substrates of the test coupons for the bending tests. Mechanical
Shiyou Xu, Yong Shi
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Invariants of electromechanical coupling coefficients in piezoceramics
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003The relationships between coefficients of electromechanical coupling (CEMC) of various types of piezoceramic resonator (PR) vibrations are considered. Being constant for a given piezoceramic state, the range of variation of piezoceramics dielectric permittivity from a mechanically "free" condition at relatively low frequencies up to an "overall clamped"
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Electromechanical Coupled Free Vibration for Electromechanical Integrated Toroidal Drive
2006 2nd IEEE/ASME International Conference on Mechatronics and Embedded Systems and Applications, 2006In this paper, based on electromechanical coupled dynamic equations of the drive system, the natural frequencies and vibration modes of the drive system are investigated. The vibration modes of the mechanical system of the drive are classified into rotational modes, planet modes and single planet modes.
Lizhong Xu, Xiuhong Hao
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Electromechanical Coupling and Composite Transducers
The Journal of the Acoustical Society of America, 1963Measurements with composite types of transducers indicate that both the classical definition of the electromechanical coupling factor and the equivalent circuit for a piezoelectric transducer require revisions for improved consistency. The effective coupling coefficient depends on the proportion of the piezoelectric material that is employed ...
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