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Elsevier Science BV |
Documentos disponibles de esta editorial (389)
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Sánchez Brea, Luis Miguel ; Alonso Fernández, José ; Bernabeu Martínez, Eusebio | Elsevier Science BV | 2004-06-01When a polychromatic light illuminates a grating, an achromatic and continuous self-imaging regime is produced, what means that Talbot planes are eliminated. In this work, we investigate the existence of this continuous regime for generalized gr[...]texto impreso
In this paper we study properties ofcertain fuzzy maps associated to a map, and we apply these properties to obtain results on quotient fuzzy topological spaces.texto impreso
Franco Peláez, Francisco Javier ; Zong, Yi ; Agapito Serrano, Juan Andrés ; Marques, José G. ; Fernandes, Ana C. ; Casas-Cubillos, Juan ; Rodríguez-Ruiz, Miguel Ángel | Elsevier Science BV | 2005-11-20The electronic instrumentation of the Large Hadron Collider (LHC) cryogenic system is expected to receive a large radiation dose (> 10E13 n·cm?2 and 1–2 kGy (Si)) within 10 years of activity so all the electronic devices should tolerate this rad[...]texto impreso
Zong, Yi ; Franco Peláez, Francisco Javier ; Agapito Serrano, Juan Andrés ; Fernandes, Ana C. ; Marques, José G. | Elsevier Science BV | 2006-09-29This paper concentrates on the selection of radiation tolerant isolation amplifiers, which are suitable for the signal conditioners for cryogenic system in the Large Hadron Collider (LHC). The evolution and the results of different commercial is[...]texto impreso
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Gonzalo, A. ; Nogales Díaz, Emilio ; Lorenz, K. ; Víllora, E. G. ; Shimamura, K: ; Piqueras de Noriega, Javier ; Méndez Martín, Bianchi | Elsevier Science BV | 2017-11The structural and luminescence properties of gallium oxide nanowires doped with chromium or manganese have been investigated. Undoped Ga?O? nanostructures have been fabricated by a thermal evaporation method, while doping was subsequently achie[...]texto impreso
This paper deals with the aggregation of individual fuzzy preference relations. The idea behind a democratic fuzzy aggregation rule is in the first place related to the concepts of individual power and social consensus, and it is pointed out tha[...]texto impreso
We report on recent progress on the chiral unitary approach, analogous to the effective range expansion in Quantum Mechanics, which is shown to have a much larger convergence radius than ordinary chiral perturbation theory, allowing one to repro[...]texto impreso
We introduce in this paper an iterative estimation procedure based on conditional medians valid to fit linear models when, on the one hand, the distribution of errors, assumed to be known, may be general and, on the other, the dependent data ste[...]texto impreso
A relativistic many-body calculation for an effective QCD Hamiltonians reported for exotic and charmed hybrid mesons. The nonexotic J(PC) = 1(--) charmonium spectrum now resolves the anonymous overpopulation of observed J/psi states. The exotic [...]texto impreso
We represent QCD at the hadronic scale by means of an effective Hamiltonian, H, formulated in the Coulomb gauge. As in the Nambu-Jona-Lasinio model, chiral symmetry is explicitly broken, however our approach is renormalizable and also includes c[...]texto impreso
Morcuende, D. ; Rosado, J. ; Contreras González, José Luis ; Arqueros Martínez, Fernando | Elsevier Science BV | 2019-01Atmospheric fluorescence is usually neglected in the reconstruction of the signals registered by Cherenkov telescopes, both IACTs and wide-angle detector arrays. In this paper we quantify the fluorescence contribution to the total light recorded[...]texto impreso
We discuss in general terms pole trajectories of resonances coupling to a continuum channel as some strength parameter is varied. It is demonstrated that, regardless of the underlying dynamics, the trajectories of poles that couple to the contin[...]texto impreso
Blázquez Salcedo, José Luis ; Kunz, Jutta ; Navarro Lérida, Francisco ; Radu, Eugen | Elsevier Science BV | 2017-08-10We construct a generalization of the AdS charged rotating black holes with two equal magnitude angular momenta in five-dimensional minimal gauged supergravity. In addition to the mass, electric charge and angular momentum, the new solutions poss[...]texto impreso
In the double rank analysis of research publications, the local rank position of a country or institution publication is expressed as a function of the world rank position. Excluding some highly or lowly cited publications, the double rank plot [...]texto impreso
By means of a coupled channel non-perturbative unitary approach, it is possible to extend the strong constrains of Chiral Perturbation Theory to higher energies. In particular, it is possible to reproduce the lowest lying resonances in meson-mes[...]texto impreso
Direct (oxidation) methanol fuel cells (DMFCs) are attractive for several applications, however, there are several barriers which must be overcome before they can become an alternative to internal combustion engines. At present, methanol crossov[...]texto impreso
This paper introduces a median estimator of the logistic regression parameters. It is defined as the classical L-1-estimator applied to continuous data Z(1),..., Z(n) obtained by a statistical smoothing of the original binary logistic regression[...]texto impreso
The action of the S-duality Sl(2,Z) group on the moduli of the Calabi-Yau manifold WIP^(12)_(11226) appearing in the rank two dual pair (K3 × T 2/WIP^(12)_(11226)) is defined by interpreting the N = 4 to N = 2 flow, for SU(2) supersymmetric Yang[...]texto impreso
Izquierdo Gil, María Amparo ; Barragán García, Vicenta María ; Godino Gómez, María Paz ; García Villaluenga, Juan Pedro ; Ruiz Bauzá, Carlos ; Seoane Rodríguez, Benjamín | Elsevier Science BV | 2009-01-12The salt flow through several commercial cation-exchange membranes separating two NaCl alcohol-water solutions with the same alcohol concentration, but different NaCl concentration was investigated. Homogeneous (Nafion-115) and heterogeneous (MK[...]texto impreso
Freire-Lista, D.M ; Fort González, Rafael ; Varas Muriel, María José | Elsevier Science BV | 2016-11San Pedro leucogranite from A Coruña, in the Northwest of Spain, has been a building stone widely used in the Middle Ages. Colour, rarity, appearance and petrophysical properties have led to the use of this leucogranite. Monuments such as church[...]texto impreso
We make a thermal analysis of the light scalar susceptibilities using SU(3)-chiral perturbation theory to one-loop order, taking into account the QCD source of isospin breaking (IB), i.e. corrections coming from m(u) not equal m(d). The value of[...]texto impreso
The string equation appearing in the double scaling limit of the Hermitian one–matrix model, which corresponds to a Galilean self–similar condition for the KdV hierarchy, is reformulated as a scaling self–similar condition for the Ur–KdV hierarc[...]texto impreso
Barrio Uña, Juan Abel ; Domínguez Díaz, Alberto ; López Moya, Marcos ; Nieto Castaño, Daniel ; otros, ... | Elsevier Science BV | 2018-08e-ASTROGAM ('enhanced ASTROGAM') is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy ra[...]texto impreso
Arganda, E. ; Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Elsevier Science BV | 2011-03We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 x 10(17) eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the [...]texto impreso
Martínez, S. ; Arqueros Martínez, Fernando ; Fonseca González, Mª Victoria | Elsevier Science BV | 1995-03-15Electromagnetic energy injected into the universe above a few hundred TeV is expected to pile up as ? radiation in a relatively narrow energy interval below 100 TeV due to its interaction with the 2.7^°K background radiation. We present an upper[...]texto impreso
Martínez Pabón, María Beatriz ; Arqueros Martínez, Fernando ; Fernández Sánchez, Paloma ; Fonseca, V. | Elsevier Science BV | 1995-03-16Electromagnetic energy injected into the universe above a few hundred TeV is expected to pile up as ? radiation in a relatively narrow energy interval below 100 TeV due to its interaction with the 2.7°K background radiation. We present an upper [...]texto impreso
We present the results of an analysis of data recorded at the Pierre Auger Observatory in which we search for groups of directionally-aligned events (or 'multiplets') which exhibit a correlation between arrival direction and the inverse of the e[...]texto impreso
Torcal Milla, Francisco José ; Sánchez Brea, Luis Miguel ; Salgado Remacha, Francisco Javier ; Bernabeu Martínez, Eusebio | Elsevier Science BV | 2010-10-15We analyze the near field behavior of binary amplitude gratings which present a curved profile. This configuration has an important application in rotary optical encoders. This kind of encoders is used to measure the angular displacement between[...]texto impreso
This work is concerned with the following system: [GRAPHICS] which is a model to describe several phenomena in which aggregation plays a crucial role as, for instance, motion of bacteria by chemotaxis and equilibrium of self-attracting clusters.[...]texto impreso
In this paper we consider aggregation operators satisfying non-decreasingness and some specific boundary conditions. We then analyze some properties of such a family of aggregation operators, introducing the semiautoduality condition, which is w[...]texto impreso
A variation on the abelian Higgs model, with SU(2)global x U(1)local symmetry broken to U(1)global, was recently shown by Vachaspati and Achucarro to admit stable, finite-energy cosmic string solutions, even though the manifold of minima of the [...]texto impreso
We construct a model for the quark-gluon vertex of Landau gauge QCD. This is of twofold interest: on the one hand the quark-gluon interaction is at the heart of quark confinement, on the other hand it is a central element in hadron phenomenology[...]texto impreso
Arroba, Patricia ; Risco Martín, José Luis ; Zapater Sancho, Marina ; Moya, José Manuel ; Ayala Rodrigo, José Luis ; Olcoz Herrero, Katzalin | Elsevier Science BV | 2014As advanced Cloud services are becoming mainstream, the contribution of data centers in the overall power consumption of modern cities is growing dramatically. The average consumption of a single data center is equivalent to the energy consumpti[...]texto impreso
Carrasco Millán, Pedro ; García-Ferrero, M. Ángeles ; Llanes Estrada, Felipe José ; Porras Riojano, Ana ; Sánchez García, Esteban M. | Elsevier Science BV | 2018-05We deploy Shannon’s information entropy to the distribution of branching fractions in a particle decay. This serves to quantify how important a given new reported decay channel is, from the point of view of the information that it adds to the al[...]texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1994-04-15Sharpness changes of the spatial profile of a gaussian beam induced by spherically aberrated lenses are investigated in terms of the so-called kurtosis parameter. It is shown both theoretically and experimentally that, after a single aberrated l[...]texto impreso
We consider a family of local BRS-invariant higher covariant derivative regularizations of SU(N) Chem-Simons theory that do not shift the value of the Chem-Simons parameter k to k + sign(k) c(v) at one loop.texto impreso
Kami?ski, Robert ; Garcia-Martin, R. ; Grynkiewicz, P. ; Peláez Sagredo, José Ramón | Elsevier Science BV | 2009-01We show how the new precise data on kaon decays together with forward dispersion relations, sum rules and once- and twice-subtracted Roy’s equations allow for a precise determination of the sigma meson pole position. We present a comparison and [...]texto impreso
In this paper, we deal with a discrete-time multiserver retrial queue with finite population. Firstly, we study the Markov chain at the epochs immediately after slot boundaries making emphasis on the computation of its steady-state distribution.[...]texto impreso
Classical dimension theory, when applied to preference modeling, is based upon the assumption that linear ordering is the only elemental notion for rationality. In fact, crisp preferences are in some way decomposed into basic criteria, each one [...]texto impreso
The non-isothermal membrane distillation (MD) separation process is known for about 50 years and very few studies are reported on its economics, energy analysis and costs evaluations. Dispersed and confusing water production costs (WPC) and spec[...]texto impreso
Enciso, A. ; Finkel Morgenstern, Federico ; González López, Artemio ; Rodríguez González, Miguel Ángel | Elsevier Science BV | 2005-01-06We construct new solvable rational and trigonometric spin models with near-neighbors interactions by an extension of the Dunkl operator formalism. In the trigonometric case we obtain a finite number of energy levels in the center of mass frame, [...]texto impreso
We consider the minimal low-energy action for gravity up to six derivatives which is renormalizable at the two-loop level modulo higher derivative corrections. Then we study the classical solutions corresponding to the Schwarzschild and the Robe[...]texto impreso
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In this paper we deal with decision-making problems over an unfuzzy set of alternatives. On one hand, we propose the problem of finding a max-min transitive relation as near as possible to a given initial preference relation, under the least-squ[...]texto impreso
We present an application of the analysis of light propagation in optical waveguides using the dynamic programming technique. We have obtained results for the transit time light pulse propagated in periodically segmented waveguides. Different se[...]texto impreso
Salcedo Sanz, S. ; Portilla Figueras, J.A. ; Ortiz Garcíaq, E.G. ; Pérez Bellido, A.M. ; García Herrera, Ricardo ; Elorrieta, J.I. | Elsevier Science BV | 2009-11-15This paper discusses the performance of Radial Basis Function networks (RBF) in a problem of spatial regression of pollutants in Madrid. Specifically, the spatial regression of NO_(x) and O_(3) is considered, in such a way that, starting from a [...]texto impreso
Arqueros Martínez, Fernando ; Aab, A. ; Abreu, P. ; Aglietta, M. ; Al Samarai, I. ; Alburquerque, I.F.M. ; Allekotte, I. ; Almela, A. ; Álvarez Castillo, J. ; Álvarez-Muñiz, J. ; otros, ... | Elsevier Science BV | 2017-10We present a novel method to measure precisely the relative spectral response of the fluorescence telescopes of the Pierre Auger Observatory. We used a portable light source based on a xenon flasher and a monochromator to measure the relative sp[...]texto impreso
Muñoz, Laura ; Fernández Ramírez, César ; Relaño Pérez, Armando ; Retamosa Granado, Joaquín | Elsevier Science BV | 2012-03-29We present a robust analysis of the spectral fluctuations exhibited by the light meson spectrum. This analysis provides information about the degree of chaos in light mesons and may be useful to get some insight on the underlying interactions. O[...]