Browsing Artículos by Title
Now showing items 143-162 of 203
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On the linear stability of the extreme Kerr black hole under axially symmetric perturbations
(2014)We prove that for axially symmetric linear gravitational perturbations of the extreme Kerr black hole, there exists a positive definite and conserved energy. This provides a basic criteria for linear stability in axial ... -
On the nature of defects in liquid-phase exfoliated graphene
(2014)Liquid-phase exfoliation is one of the most promising routes for large-scale production of multilayer graphene dispersions. These dispersions, which may be used in coatings, composites, or paints, are believed to contain ... -
On the theorem of the primitive element with applications to the representation theory of associative and Lie algebras
(2014)We describe all finite dimensional uniserial representations of a commutative associative (resp. abelian Lie) algebra over a perfect (resp. sufficiently large perfect) field. In the Lie case the size of the field depends ... -
One-dimensional singular problems involving the p-Laplacian and nonlinearities indefinite in sign
(2016)Let Ω be a bounded open interval, let p > 1 and γ >, and let m : Ω → ℝ be a function that may change sign in Ω. In this article we study the existence and nonexistence of positive solutions for one-dimensional singular ... -
A pair production telescope for medium-energy gamma-ray polarimetry
(2014)We describe the science motivation and development of a pair production telescope for medium-energy (∼5–200 MeV) gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope (AdEPT), takes advantage ... -
Pensar y calcular
(2014)Pensamos. Y pensamos que pensar es una de las características distintivas de los bípedos implumes, distinción que ha provocado un salto evolutivo incalculable. A veces tratamos de calcular distintas cosas, por ejemplo ... -
A performance evaluation of oscillation based test in continuous time filters
(2014)This work evaluates the ability of OBT for detecting parametric faults in continuous-time filters. To this end, we adopt two filters with quite different topologies as cases of study and a previously reported statistical ... -
Permutation entropy applied to the characterization of the clinical evolution of epileptic patients under pharmacological treatment
(2014)Different techniques originated in information theory and tools from nonlinear systems theory have been applied to the analysis of electro-physiological time series. Several clinically relevant results have emerged from ... -
Plasmatic biochemical variables associated with polymorphisms in the endothelin-1 and endothelin-1 receptor a genes in hypertensive patients : pilot study
(2016)Aims: Endothelin-1 (ET-1) is a potent vasoconstrictive peptide, and its activity is mediated by the type A receptor (EDNRA). This action may play a significant role in the etiology of hypertension. There are different works ... -
Playing against fair adversaries in stochastic games with total rewards
(2022)We investigate zero-sum turn-based two-player stochastic games in which the objective of one player is to maximize the amount of rewards obtained during a play, while the other aims at minimizing it. We focus on games in ... -
Positivity results for indefinite sublinear elliptic problems via a continuity argument
(2017)We establish a positivity property for a class of semilinear elliptic problems involving indefinite sublinear nonlinearities. Namely, we show that any nontrivial nonnegative solution is positive for a class of problems the ... -
A posteriori error estimates for elliptic problems with Dirac measure terms in weighted spaces
(2014)In this article we develop a posteriori error estimates for second order linear elliptic problems with point sources in two- and three-dimensional domains. We prove a global upper bound and a local lower bound for the error ... -
Las potencialidades de la narrativa en la formación de profesores
(2014)Este artículo tiene como objetivo argumentar en relación con la potencialidad de los textos narrativos para la formación de profesores. Para sustentar nuestra argumentación tomaremos aportes teóricos de diversos autores ... -
Problem of quantifying quantum correlations with non-commutative discord
(2017)In this work we analyze a non-commutativity measure of quantum correlations recently proposed by Y. Guo [Sci. Rep. 6, 25241 (2016)]. By resorting to a systematic survey of a two-qubit system, we detected an undesirable ... -
Properties of NiMnGa alloys ultra rapidly solidified by suction casting
(2015)Ni2MnGa alloys are obtained by suction casting in water chilled cylindrical copper moulds 50 mm long and 1-4 mm in diameter; the microstructure and the magnetic properties are then investigated as functions of the cylinder ... -
Propiedades de un hilorama clásico
(2016)Un hilorama es una figura formada mediante hilos o cuerdas que unen dos segmentos y se van cruzando entre sí. El efecto visual de estas figuras es llamativo y se utiliza en el arte, el diseño y la arquitectura. En este ... -
Proving correctness of a compiler using step-indexed logical relations
(2016)In this paper we prove the correctness of a compiler for a call-by-name language using step-indexed logical relations and biorthogonality. The source language is an extension of the simply typed lambda-calculus with ... -
Pure type systems with explicit substitutions
(2015)We introduce a new formulation of pure type systems (PTSs) with explicit substitution and de Bruijn indices and formally prove some of its meta-theory. Using techniques based on Normalisation by Evaluation, we prove that ... -
Rare event simulation with fully automated Importance splitting
(2015)Probabilistic model checking is a powerful tool for analysing probabilistic systems but it can only be efficiently applied to Markov models. Monte Carlo simulation provides an alternative for the generality of stochastic ... -
Reaction rate in an evanescent random walkers system
(2015)Diffusion mediated reaction models are particularly ubiquitous in the description of phys-ical, chemical or biological processes. The random walk schema is a useful tool for formu-lating these models. Recently, evanescent ...
