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N. G. Green, A. Ramos, A. González, H. Morgan, and A. Castellanos Departamento de Electrónica y Electromagnetismo, Facultad de Fı́sica, Universidad de Sevilla, Reina Mercedes s/n, 41012 Sevilla, Spain Departamento de Fı́sica Aplicada, ESI Universidad de Sevilla, Camino de Los Descubrimientos s/n, 41092 Sevilla, Spain Bioelectronics Research Centre,(More)
Net fluid flow induced by ac potentials applied to arrays of co-planar interdigitated microelectrodes is reported. Two types of microelectrode structures have been employed: arrays of unequal width electrodes subjected to a single ac signal, and arrays of identical electrodes subjected to a traveling-wave potential. A square glass chamber was constructed(More)
Electrothermal motion in an aqueous solution arises from the action of an electric field on inhomogeneities in the liquid induced by temperature gradients. The temperature field can be produced by the applied electric field through Joule heating, or caused by external sources, such as strong illumination. Electrothermal flows in microsystems are usually(More)
Videostroboscopy is an examination which yields a permanent record of the moving vocal folds. Thus, it allows the diagnosis of abnormalities which contribute to voice disorders. In this paper, in order to nd and quantify the deformation of the vocal folds in videostroboscopic recordings, an active contours (snakes) based approach is used to delineate the(More)
The stability criterion for cylindrical dielectric liquid bridges, subjected to a longitudinal electric field under low gravity conditions is obtained. Two methods have been used to deal with gravity effects. One is the Lyapunov-Schmidt reduction, a projection technique that gives the local bifurcation diagrams for a cylindrical liquid bridge as a function(More)
The equivalent circuit method (ECM) was applied in the analysis of the membrane potential distribution in spherical membranes suspended in electrolytic solution. Numerical results are in agreement with the analytical cosine distribution for a single membrane in an uniform electric field. However, for a suspension of membranes, the numerical results show(More)
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