El proceso contra Jato Tello (Vitoria 1485): ¿Error judicial o empleo de la justicia penal en la política antijudía?

[ES]El objeto de este artículo es saber hasta qué punto pudo emplearse la justicia penal como un instrumento más de la política de carácter antijudío desarrollada por las autoridades cristianas de la España medieval a finales del siglo XV, concretamente en los momentos previos a la expulsión. Para indagar sobre esta cuestión se tendrá presente el proceso penal por blasfemia al que fue sometido el judío de Vitoria (Álava) Jato Tello.

About the Stabilization of a Nonlinear Perturbed Difference Equation

This paper investigates the local asymptotic stabilization of a very general class of instable autonomous nonlinear difference equations which are subject to perturbed dynamics which can have a different order than that of the nominal difference equation. In the general case, the controller consists of two combined parts, namely, the feedback nominal controller which stabilizes the nominal (i.e., perturbation-free) difference equation plus an incremental controller which completes the stabilization in the presence of perturbed or unmodeled dynamics in the uncontrolled difference equation. A stabilization variant consists of using a single controller to stabilize both the nominal difference equation and also the perturbed one under a small-type characterization of the perturbed dynamics. The study is based on Banach fixed point principle, and it is also valid with slight modification for the stabilization of unstable oscillatory solutions.

Advances in Nonlinear Complexity Analysis for Partial Differential Equations

1 p. -- [Editorial Material]

Subdiffusion of nonlinear waves in quasiperiodic potentials

19 p.

An observer-based vaccination control law for an SEIR epidemic model based on feedback linearization techniques for nonlinear systems

This paper presents a vaccination strategy for fighting against the propagation of epidemic diseases. The disease propagation is described by an SEIR (susceptible plus infected plus infectious plus removed populations) epidemic model. The model takes into account the total population amounts as a refrain for the illness transmission since its increase makes the contacts among susceptible and infected more difficult. The vaccination strategy is based on a continuous-time nonlinear control law synthesised via an exact feedback input-output linearization approach. An observer is incorporated into the control scheme to provide online estimates for the susceptible and infected populations in the case when their values are not available from online measurement but they are necessary to implement the control law. The vaccination control is generated based on the information provided by the observer. The control objective is to asymptotically eradicate the infection from the population so that the removed-by-immunity population asymptotically tracks the whole one without precise knowledge of the partial populations. The model positivity, the eradication of the infection under feedback vaccination laws and the stability properties as well as the asymptotic convergence of the estimation errors to zero as time tends to infinity are investigated.

Intraobserver error associated with anthropometric measurements made by dietitians

Este trabajo se encuentra bajo la licencia Creative Commons Attribution 3.0.

Aplicación de redes neuronales artificiales para la caracterización del error en trayectorias circulares por WEDM

El objeto del presente trabajo, titulado “Aplicación de redes neuronales artificiales para la caracterización del error en trayectorias circulares por WEDM”, es el estudio y posterior optimización del error en trayectorias circulares mecanizadas mediante electroerosión por hilo. Se pretende desarrollar un modelo predictivo de dicho error a través de la implementación de una Red Neuronal Artificial (RNA), que deberá ser alimentada con resultados empíricos resultantes de una batería de ensayos. El modelo desarrollado permitirá conocer a priori los errores que se producirán al cortar formas circulares en distintos espesores y con distintos radios sin necesidad de recurrir a costosas baterías de ensayos.

Nonlinear magnetic vortex dynamics in a circular nanodot excited by spin-polarized current

We investigate analytically and numerically nonlinear vortex spin torque oscillator dynamics in a circular magnetic nanodot induced by a spin-polarized current perpendicular to the dot plane. We use a generalized nonlinear Thiele equation including spin-torque term by Slonczewski for describing the nanosize vortex core transient and steady orbit motions and analyze nonlinear contributions to all forces in this equation. Blue shift of the nano-oscillator frequency increasing the current is explained by a combination of the exchange, magnetostatic, and Zeeman energy contributions to the frequency nonlinear coefficient. Applicability and limitations of the standard nonlinear nano-oscillator model are discussed.

Caracterización del error en el corte de desbaste de trayectorias circulares mediante WEDM.

[ES]En la actualidad el proceso de mecanizado mediante electroerosión por hilo (WEDM) posee varias problemáticas a la hora de la ejecución de los cortes para producir diferentes formas, ya sean esquinas, radios de redondeo o de acuerdo y por último la realización de círculos. Es por ello por lo que se elabora el presente trabajo cuya finalidad es llegar a caracterizar los errores cometidos en el corte de desbaste de probetas con trayectorias circulares y tecnología estándar. De esta manera se podrá cuantificar las desviaciones que se producen en las piezas en función del espesor y de sus radios. Toda la información obtenida en el trabajo permitirá una futura actuación en diversos parámetros máquina, elaborando nuevas tecnologías o bien poder mitigarlos realizando correcciones geométricas, ajustando sus tolerancias.

Hyers-Ulam-Rassias Stability of Functional Differential Systems with Point and Distributed Delays

This paper investigates stability and asymptotic properties of the error with respect to its nominal version of a nonlinear time-varying perturbed functional differential system subject to point, finite-distributed, and Volterra-type distributed delays associated with linear dynamics together with a class of nonlinear delayed dynamics. The boundedness of the error and its asymptotic convergence to zero are investigated with the results being obtained based on the Hyers-Ulam-Rassias analysis.

Approximate Solutions by Truncated Taylor Series Expansions of Nonlinear Differential Equations and Related Shadowing Property with Applications

This paper investigates the errors of the solutions as well as the shadowing property of a class of nonlinear differential equations which possess unique solutions on a certain interval for any admissible initial condition. The class of differential equations is assumed to be approximated by well-posed truncated Taylor series expansions up to a certain order obtained about certain, in general nonperiodic, sampling points t(i) is an element of [t(0), t(J)] for i = 0, 1, . . . , J of the solution. Two examples are provided.