Listar Artículos de revista DIMI - MIIS Aldizkari artikuluak por título
Mostrando ítems 36-55 de 61
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A mixed-FEM and BEM coupling for the approximation of the scattering of thermal waves in locally non-homogeneous media
Rapún Araiz, María Luisa
; Sayas, Francisco Javier (EDP Sciences, 2006)
Artículo / Artikulua 
This paper proposes and analyzes a BEM-FEM scheme to approximate a time-harmonic diffusion problem in the plane with non-constant coefficients in a bounded area. The model is set as a Helmholtz transmission problem with ... -
Modified Douglas splitting methods for reaction–diffusion equations
Arrarás Ventura, Andrés 
; Hout, K. J. in ’t; Hundsdorfer, W.; Portero Egea, Laura (Springer, 2017)
Artículo / Artikulua
We present modifications of the second-order Douglas stabilizing corrections method, which is a splitting method based on the implicit trapezoidal rule. Inclusion of an explicit term in a forward Euler way is straightforward, ... -
New asymptotic expansion and error bound for Stirling formula of reciprocal Gamma function
Pagola Martínez, Pedro Jesús (Ele-Math, 2018)
Artículo / Artikulua
Studying the problem about if certain probability measures are determinate by its moments [4, 8, 10] is useful to know the asymptotic behavior of the probability densities for large values of argument. This requires, ... -
New series expansions of the 3F2 function
López García, José Luis ; Pagola Martínez, Pedro Jesús ; Pérez Sinusía, Ester (2015)
Artículo / Artikulua
We can use the power series definition of 3F2(a1, a2, a3; b1, b2; z) to compute this function for z in the unit disk only. In this paper we obtain new expansions of this function that are convergent in larger domains. ... -
A note on the asymptotic expansion of the Lerch’s transcendent
Cai, Xing Shi; López García, José Luis (Taylor & Francis, 2018)
Artículo / Artikulua
In Ferreira and López [Asymptotic expansions of the Hurwitz–Lerch zeta function. J Math Anal Appl. 2004;298(1):210–224], the authors derived an asymptotic expansion of the Lerch's transcendent Φ(z,s,a) for large |a|, valid ... -
On a modifcation of Olver's method: a special case
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Springer US, 2016)
Artículo / Artikulua
We consider the asymptotic method designed by Olver (Asymptotics and special functions. Academic Press, New York, 1974) for linear differential equations of the second order containing a large (asymptotic) parameter : ... -
Optimal monotonicity-preserving perturbations of a given Runge–Kutta method
Higueras Sanz, Inmaculada ; Ketcheson, David I.; Kocsis, Tihamér A. (Springer, 2018)
Artículo / Artikulua
Perturbed Runge–Kutta methods (also referred to as downwind Runge–Kutta methods) can guarantee monotonicity preservation under larger step sizes relative to their traditional Runge–Kutta counterparts. In this paper we study ... -
Optimization and design of wireless systems for the implementation of context aware scenarios in railway passenger vehicles
Azpilicueta Fernández de las Heras, Leyre ; Astrain Escola, José Javier ; López Iturri, Peio ; Granda, Fausto; Vargas Rosales, César; Villadangos Alonso, Jesús ; Perallos Ruiz, Asier; Bahillo, Alfonso; Falcone Lanas, Francisco (IEEE, 2017)
Artículo / Artikulua
In this paper, intra-wagon wireless communication performance is analyzed, in order to account for inherent scenario complexity in the deployment phase of wireless systems toward the implementation of a context-aware ... -
Optimized strong stability preserving IMEX Runge-Kutta methods
Higueras Sanz, Inmaculada ; Happenhofer, Natalie; Koch, Othmar; Kupka, Friedrich (2014)
Artículo / Artikulua
We construct and analyze robust strong stability preserving IMplicit-EXplicit Runge-Kutta (IMEX RK) methods for models of flow with diffusion as they appear in astrophysics and in many other fields where equations with ... -
Order barrier for low-storage DIRK methods with positive weights
Higueras Sanz, Inmaculada ; Roldán Marrodán, Teodoro (Springer, 2018)
Artículo / Artikulua
In this paper we study an order barrier for low-storage diagonally implicit Runge-Kutta (DIRK) methods with positive weights. The Butcher matrix for these schemes, that can be implemented with only two memory registers in ... -
Orthogonal basis for the optical transfer function
Ferreira González, Chelo; López García, José Luis ; Navarro, Rafael; Pérez Sinusía, Ester (Optical Society of America, 2016)
Artículo / Artikulua
We propose systems of orthogonal functions qn to represent optical transfer functions (OTF) characterized by including the diffraction-limited OTF as the first basis function q0 OTF perfect. To this end, we apply a powerful ... -
Orthogonal basis with a conicoid first mode for shape specification of optical surfaces
Ferreira González, Chelo; López García, José Luis ; Navarro, Rafael; Pérez Sinusía, Ester (Optical Society of America, 2016)
Artículo / Artikulua
A rigorous and powerful theoretical framework is proposed to obtain systems of orthogonal functions (or shape modes) to represent optical surfaces. The method is general so it can be applied to different initial shapes and ... -
Orthogonal basis with a conicoid first mode for shape specification of optical surfaces: reply
Ferreira González, Chelo; López García, José Luis ; Navarro, Rafael; Pérez Sinusía, Ester (Optical Society of America, 2016)
Artículo / Artikulua
We present some comments to the paper 'Orthogonal basis with a conicoid first mode for shape specification of optical surfaces: comment'. -
Oscillatory motions in restricted N-body problems
Álvarez-Ramírez, Martha; Rodríguez García, Antonio ; Palacián Subiela, Jesús Francisco ; Yanguas Sayas, Patricia (Elsevier, 2018)
Artículo / Artikulua
We consider the planar restricted N-body problem where the N−1 primaries are assumed to be in a central configuration whereas the infinitesimal particle escapes to infinity in a parabolic orbit. We prove the existence of ... -
The Pearcey integral in the highly oscillatory region
López García, José Luis ; Pagola Martínez, Pedro Jesús (Elsevier, 2016)
Artículo / Artikulua
We consider the Pearcey integral P(x, y) for large values of |y| and bounded values of |x|. The integrand of the Pearcey integral oscillates wildly in this region and the asymptotic saddle point analysis is complicated. ... -
Radio characterization for ISM 2.4 GHz wireless sensor networks for judo monitoring applications
López Iturri, Peio ; Aguirre Gallego, Erik ; Azpilicueta Fernández de las Heras, Leyre ; Astrain Escola, José Javier ; Villadangos Alonso, Jesús ; Falcone Lanas, Francisco Javier (MDPI, 2014)
Artículo / Artikulua
In this work, the characterization of the radio channel for ISM 2.4GHz Wireless Sensor Networks (WSNs) for judo applications is presented. The environments where judo activity is held are usually complex indoor scenarios ... -
Radio wave propagation and WSN deployment in complex utility tunnel environments
Celaya Echarri, Mikel ; Azpilicueta Fernández de las Heras, Leyre ; López Iturri, Peio ; Picallo Guembe, Imanol ; Aguirre Gallego, Erik ; Astrain Escola, José Javier ; Villadangos Alonso, Jesús ; Falcone Lanas, Francisco Javier (MDPI, 2020)
Artículo / Artikulua
The significant growth of wireless communications systems in the last years has led to the adoption of a wide range of applications not only for the general public but, also, including utilities and administrative authorities. ... -
Representations of hypergeometric functions for arbitrary parameter values and their use
Karp, D. B.; López García, José Luis (2017)
Artículo / Artikulua
Integral representations of hypergeometric functions proved to be a very useful tool for studying their properties. The purpose of this paper is twofold. First, we extend the known representations to arbitrary values of ... -
Scalability approaches for causal multicast: a survey
Juan Marín, Rubén de; Decker, Hendrik; Armendáriz Íñigo, José Enrique ; Bernabéu Aubán, José M.; Muñoz Escoí, Francesc D. (Springer, 2016)
Artículo / Artikulua
Many distributed services need to be scalable: internet search, electronic commerce, e-government... In order to achieve scalability those applications rely on replicated components. Because of the dynamics of growth and ... -
A simplification of the stationary phase method: application to the Anger and Weber functions
López García, José Luis (Kent State UniversityJohann Radon Institute (RICAM), 2017)
Artículo / Artikulua
The main difficulty in the practical use of the stationary phase method in asymptotic expansions of integrals is originated by a change of variables. The coefficients of the asymptotic expansion are the coefficients of the ...
