ListarMatemáticas y Física por tema "Física Matemática"
Mostrando ítems 1-13 de 13
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Análisis de Estabilidad de un Controlador PID WAVELET
(2011)En este trabajo se analiza la estabilidad de un controlador PID multiresolución, el cual hace uso de la teorÃa wavelet para la descomposición de la señal de error de seguimiento. Se presenta una función de error general ... -
Bloch Floquet waves and localisation within a heterogeneous waveguide with long cracks
(2010)A bi-material waveguide is assumed to have an array of sufficiently long cracks parallel to the boundaries. The BlochÂFloquet waves propagating along such a waveguide are dispersive, and the band gaps are clearly identified. ... -
Una Conjetura de Polya y Szego para el Tono Fundamental de Membranas Poligonales
(2010)Polya y Szego conjeturaron que el n-polgono regular es capaz de producir el tono mas grave de entre los polgonos con n lados. La conjetura sigue abierta para todos los valores de n 5, despues de casi setenta a~nos de haber ... -
CONTINUOUS AND DISCRETE FLOWS ON OPERATOR ALGEBRAS
(2009)Let (N, R, ) be a centrally ergodic W* dynamical system. When N is not a factor, we show that, for each t 6= 0, the crossed product induced by the time t automorphism t is not a factor if and only if there exist a rational ... -
D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory
(2008)A classification of D-branes in Type IIB Op? orientifolds and orbifolds in terms of Real and equivariant KK-groups is given. We classify D-branes intersecting orientifold planes from which are recovered some special limits ... -
Eigenfunction expansions and spectral projections for isotropic elasticity outside an obstacle
(2004)We consider the operator ??? grad div acting on an exterior domain ? in Rn (with? >0 and n = 2, 3) subject to Dirichlet boundary conditions. The spectral resolution for the operator is written in terms of an expansion of ... -
Eigenvalues, K-theory and Minimal Flows
(2007)Let (Y, T) be a minimal suspension flow built over a dynamical system (X, S) and with (strictly positive, continuous) ceiling function f : X ! R. We show that the eigenvalues of (Y, T) are contained in the range of a trace ... -
FÓRMULAS DE TIPO-WEYL PARA DOMINIOS EXTERIORES
(2003)Se presenta un recuento histórico de comportamientos asintóticos de tipo-Weyl para dominios exteriores -
Multichannel Detrended Fluctuation Analysis Reveals Synchronized Patterns of Spontaneous Spinal Activity in Anesthetized Cats
(2011)The analysis of the interaction and synchronization of relative large ensembles of neurons is fundamental for the understanding of complex functions of the nervous system. It is known that the temporal synchronization of ... -
PROPAGATION OF ELASTIC WAVES ALONG INTERFACES IN LAYERED BEAMS
(2004)An asymptotic model is proposed for the analysis of a long-wave dynamic model for a layered structure with an imperfect interface. Two layers of isotropic material are connected by a thin and soft adhesive: effectively the ... -
REALIZATION OF A SIMPLE HIGHER DIMENSIONAL NONCOMMUTATIVE TORUS AS A TRANSFORMATION GROUP C*-ALGEBRA
(2008)Let be a nondegenerate skew symmetric real d × d matrix, and let A be the corresponding simple higher dimensional noncommutative torus. Suppose that d is odd, or that d 4 and the entries of are not contained in a quadratic ... -
Slow decay of end effects in layered structures with an imperfect interface
(2003)An asymptotic analysis of a layered structure with an imperfect interface subject to an anti-plane shear deformation and non-homogeneous Dirichlet end conditions is presented in this paper. Two layers of isotropic materials ... -
THE C*-ALGEBRAS ASSOCIATED TO TIME-t AUTOMORPHISMS OF MAPPING TORI
(2006)We find the range of a trace on the K0 group of a crossed product by a time-t automorphism of a mapping torus. We also find a formula to compute the Voiculescu-Brown entropy for such an automorphism. By specializing to the ...