Artículos: Recent submissions
Now showing items 21-40 of 200
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Multi-characterization of electron-induced defects in highly oriented pyrolytic graphite
(2016)Engineering the properties of materials through defects is at the forefront of research in Materials Science. Here, we investigate the defects produced on highly oriented pyrolytic graphite (HOPG) samples irradiated with ... -
Construction of a quartz spherical analyzer : application to high-resolution analysis of the Ni Ka emission spectrum
(2016)The construction and characterization of a focusing X-ray spherical analyzer based on α-quartz 4404 are presented. The performance of the analyzer was demonstrated by applying it to a high-resolution X-ray spectroscopy ... -
ICME international survey on teachers working and learning through collaboration : June 2016
(2016)This article presents preliminary results from a survey commissioned for ICME 13 (2016) focusing on “Teachers Working and Learning Through Collaboration”. It takes as a starting point a previous survey, commissioned for ... -
Matrix Gegenbauer polynomials : the 2×2 fundamental cases
(2016)In this paper, we exhibit explicitly a sequence of 2 × 2 matrix valued orthogonal polynomials with respect to a weight W p,n , for any pair of real numbers p and n such that 0 < p < n. The entries of these polynomiales ... -
Gadolinium substitution effect on the thermomagnetic properties of Ni ferrite ferrofluids
(2016)This work is focused on the characterization of Ni-ferrite nanocrystals and their subsequent doping with Gd, in an attempt to explore Gd inclusion in the thermomagnetic properties of prepared ferrofluids. Spinel ferritesNiFe2O4, ... -
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 ... -
Interpolation of geometric structures compatible with a pseudo Riemannian metric
(2016)Let (M, g) be a pseudo Riemannian manifold. We consider four geometric structures on M compatible with g: two almost complex and two almost product structures satisfying additionally certain integrability conditions. For ... -
Decay bounds for nonlocal evolution equations in Orlicz spaces
(2016)We show decay bounds of the form ∫Rd φ(u (x, t)) dx ≤ Ct−μ for integrable and bounded solutions to the nonlocal evolution equation ut(x, t) = ∫Rd J(x, y)G(u(y, t) − u(x, t))(u(y, t) − u(x, t)) dy + f (u(x, t)). Here G is ... -
Molecular dissociation in presence of a catalyst : II. The bond breaking role of the transition from virtual to localized states
(2016)We address a molecular dissociation mechanism that is known to occur when a H 2 molecule approaches a catalyst with its molecular axis parallel to the surface. It is found that molecular dissociation is a form of quantum ... -
Analysis of X-ray absorption spectra of the K and L 2,3 edges of GaN within the FP-LAPW method
(2016)Gallium nitride, GaN, is a semiconductor material with several technological applications and therapeutic potential to inhibits the proliferation of tumor cells. In this work we performed all electron self consistent ... -
Lie subalgebras of the matrix quantum pseudodifferential operators
(2016)We give a complete description of the anti-involutions that preserve the principal gradation of the algebra of matrix quantum pseudodifferential operators and we describe the Lie subalgebras of their minus fixed points. -
Localization of the valence electron of endohedrally confined hydrogen, lithium and sodium in fullerene cages
(2016)The localization of the valence electron of H, Li and N a atoms enclosed by three different fullerene molecules is studied. The structure of the fullerene molecules is used to calculate the equilibrium position of the ... -
La articulación entre saberes matemáticos extraescolares y escolares en el trabajo docente en EDJA
(2016)Esta comunicación se enmarca en un trabajo de investigación sobre la enseñanza de las matemáticas en el nivel primario de la modalidad de jóvenes y adultos. En esta indagación se busca comprender las prácticas docentes y ... -
Inequality between size and charge in spherical symmetry
(2016)We prove that, for a charged spherically symmetric body, twice the radius is always strictly greater than the charge of the body. We also prove that this inequality is sharp. Finally, we discuss the physical implications ... -
Center of mass and spin for isolated sources of gravitational radiation
(2016)We define the center of mass and spin of an isolated system in general relativity. The resulting relationships between these variables and the total linear and angular momentum of the gravitational system are remarkably ... -
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 ... -
Enhancement of dissolution rate of furosemide using a solid dispersion with D-glucosamine HCl
(2016)Furosemide is a potent high ceiling (loop) diuretic mainly used in the treatment of edematous states associated with cardiac, renal, and hepatic failure, and the treatment of hypertension. Furosemide has been classified ... -
Asymptotic structure of the null surface formulation and the classical graviton
(2016)The dynamical equations for the null surface formulation of general relativity for purely radiative spacetimes are derived. Those asymptotically flat spacetimes describe the nonlinear evolution of gravitational radiation ... -
Empoderamiento : una caracterización al interior de la educación matemática
(2016)El presente trabajo pone en juego un proceso analítico-constructivo con el fin de realizar una caracterización del empoderamiento para el ámbito de la educación matemática. Para llegar a tal caracterización se delimitan ... -
Structure of the Ru, Ag and Te L X-ray emission spectra
(2016)The emission of X-rays in atomic transitions from L-shell vacancy states of Ru, Ag and Te induced by electron incidence was studied. To this end, L X-ray spectra were measured with a wavelength dispersive spectrometer, and ...