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Mostrando ítems 1-8 de 8
Artículo
Bifurcation from zero of a complete trajectory for non-autonomous logistic PDEs
(World Scientific Publishing, 2005-08)
In this paper we extend the well-known bifurcation theory for autonomous logistic equations to the non-autonomous equation ut − ∆u = λu − b(t)u 2 with b(t) ∈ [b0, B0], 0 < b0 < B0 < 2b0. In particular, we prove the ...
Artículo
Estimates for singular multiplicative character sums
(Duke University Press, 2005)
We give some estimates for multiplicative character sums on quasiprojective varieties over finite fields depending on the severity of the singularities of the variety at infinity. We also remove the hypothesis of ...
Artículo
Using electron scattering superscaling to predict charge-changing neutrino cross sections in nuclei
(American Physical Society, 2005-01-01)
Superscaling analyses of few-GeV inclusive electron scattering from nuclei are extended to include not only quasielastic processes, but also the region where excitation dominates. With reasonable assumptions about the ...
Artículo
Coefficient fields and scalar extension in positive characteristic
(Elsevier, 2005-03-15)
Let k be a perfect field of positive characteristic, k(t)per the perfect closure of k(t) and A = k[[X1, . . . , Xn]]. We show that for any maximal ideal n of A′ = k(t)per ⊗k A, the elements in Ac′ n which are annihilated ...
Ponencia
Aportaciones al modelado y control de oscilaciones en una torre de perforación petrolífera
(CEA - Comité español de automática, 2005)
En el presente artículo se presenta un resumen del trabajo hecho en en el que se introduce el sistema electromecánico constituido por una torre de perforación vertical, usada normalmente en la industria petrolífera ...
Artículo
Benzyltrimethylammonium dihydrogen orthophosphate monohydrate
(International Union of Crystallography, 2005)
The title compound, C 10 H 16 N + H 2 PO 4 H 2 O, crystallizes in the centrosymmetric space group P 2 1 / c with two independent molecules in the asymmetric unit. Therefore, nonlinear ...
Artículo
Patrón neurofisiológico del retraso mental: Estudio de un caso con electroencefalografía cuantitativa
(Universidad de Sevilla, 2005)
En este artículo se presenta el patrón electroencefalográfico cuantitativo (QEEG) de un caso con retraso mental. Pocos estudios se han hecho del fenómeno desde esta perspectiva. Se realizaron dos registros, uno con ojos ...
Artículo
Dualité et comparaison sur les complexes de de Rham logarithmiques par rapport aux diviseurs libres
(Association des Annales de l'Institut Fourier, 2005)
Let X be a complex analytic manifold and D \subset X a free divisor. Integrable logarithmic connections along D can be seen as locally free {\cal O}_X-modules endowed with a (left) module structure over the ring of logarithmic ...