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Documentos disponibles de esta editorial (389)
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Fringe pattern normalization consists in the background suppression and modulation normalization of a given fringe pattern, this process gives as a result a pure sinusoidal phase modulated signal. Normalization is an important operation in the d[...]![]()
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Alonso, J.L. ; Boucaud, Ph. ; Martín Mayor, Víctor ; van der Sijs, A.J. | Elsevier Science BV | 1998-04We present a 2+1-dimensional lattice model for the copper oxide superconductors and their parent compounds, in which both the charge and spin degrees of freedom are treated dynamically. The spin-charge coupling parameter is associated to the dop[...]![]()
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Dobado González, Antonio ; Herrero, M. J. ; Pelaez, J.H. ; Morales, E.R. ; Urdiales, M.T. | Elsevier Science BV | 1995-06-15In the present work we study the predictions for WZ and ZZ production at the LHC with the Electroweak Chiral Lagrangian (EChL) approach. Our analysis will be focused on the less favored case from the experimental point of view, in which the pred[...]![]()
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The Flexible Image Transport System (FITS) standard has been a great boon to astronomy, allowing observatories, scientists and the public to exchange astronomical information easily. The FITS standard, however, is showing its age. Developed in t[...]![]()
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Llanes Estrada, Felipe José ; General, Ignacio J. ; Wang, Ping ; Cotanch, Stephen R. | Elsevier Science BV | 2007-09-30Highlights in the search for nonconventional (non-q.q) meson states are the ?1(1400) and ?1(1600) exotic candidates. Should they exist, mounting theoretical arguments suggest that they are tetraquark molecular resonances excitable by meson resca[...]![]()
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The aim of this paper is to analyse linear production with committee control situations arising when controllers face the possibility of graduating their options. In order to model these situations, we consider several kinds of fuzzy controls, w[...]![]()
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This paper presents an approach to the local stereovision matching problem using edge segments as features with four attributes. Based on these attributes we compute a matching probability between pairs of features of the stereo images. A corres[...]![]()
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Chubykalo-Fesenko, Oksana ; Kauffman, J. ; Lengsfield, B. ; Smirnov Rueda, Román | Elsevier Science BV | 2002-04The standard Metropolis Monte Carlo is used to simulate thermal magnetization decay in ensemble of interacting and non-interacting particles. The fitting of demagnetization curves to simple Neel Arrhenius model, using the volume distribution, su[...]![]()
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Malyshev, Andrey ; Malyshev, V.A. ; Domínguez-Adame Acosta, Francisco | Elsevier Science BV | 2003-04-07We present a theoretical analysis of low-temperature quenching of one-dimensional Frenkel excitons that are localized by moderate on-site (diagonal) uncorrelated disorder. Exciton diffusion is considered as an incoherent hopping over localizatio[...]![]()
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Gharouel, S. ; Labrador-Paez, L. ; Urbieta Quiroga, Ana Irene ; Fernández Sánchez, Paloma ; Haro-Gonzalez, P. ; Horchani-Naifer, K. ; Ferid, M. | Elsevier Science BV | 2019-02-01Poly-crystals of praseodymium phosphate M^IPr(PO_3)_4 (M^I=Na, Li, K) and PrP_5O_14 have been synthesized by the flux method. All of these hosts crystallized in the monoclinic structures with different space groups. The spectroscopic properties [...]![]()
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The magnetism in the inherently nanolaminated ternary MAX-phase Cr_(2)GeC is investigated by element-selective, polarization and temperature-dependent, soft X-ray absorption spectroscopy and X-ray magnetic circular dichroism. The measurements in[...]![]()
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In the work presented the magnetic properties of the high pressure ilmenite phase Mn_2FeSbO_6 are investigated in detail. It is shown that Mn_2FeSbO_6 ilmenite is ferrimagnetic (T_N approximate to 270 K) and exhibits a near-zero coercive field H[...]![]()
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Utilizing an effective QCD Coulomb gauge Hamiltonian with linear confinement specified by lattice, we report a relativistic many-body calculation for the light exotic and charmed hybrid mesons. The Hamiltonian successfully describes both quark a[...]![]()
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Alonso, J. L. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor | Elsevier Science BV | 2000-05-11We study the linear response to an external electric field of a system of fermions in a lattice at zero temperature. This allows to measure numerically the Euclidean conductivity which turns out to be compatible with an analytical calculation fo[...]![]()
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Measurement of the energy spectrum of cosmic rays above 10(18) eV using the Pierre Auger Observatory
Arganda, E. ; Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Monasor, M. ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Elsevier Science BV | 2010-03-08We report a measurement of the flux of cosmic rays with unprecedented precision and Statistics using the Pierre Auger Observatory Based on fluorescence observations in coincidence with at least one Surface detector we derive a spectrum for energ[...]![]()
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Ballesteros, H. G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | Elsevier Science BV | 1997-05-15Using finite-size scaling methods we measure the thermal and magnetic exponents of the site percolation in four dimensions, obtaining a value for the anomalous dimension very different from the results found in the literature. We also obtain the[...]![]()
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Ballesteros, H.G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | Elsevier Science BV | 1997-05-15Using finite-size scaling methods we measure the thermal and magnetic exponents of the site percolation in four dimensions, obtaining a value for the anomalous dimension very different from the results found in the literature. We also obtain the[...]![]()
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Pacheco, Beatriz ; Gómez-Gutiérrez, Julián ; Yélamos, Belén ; Delgado, Carmen ; Roncal, Fernando ; Albar, Juan P. ; Peterson, Darrell ; Gavilanes, Francisco | Elsevier Science BV | 2006-06Based on the predicted capacity to interact with membranes at the interface, we have found three regions in the ectodomain of the hepatitis C virus envelope glycoprotein E2 (430-449, 543-560 and 603-624) with the ability to destabilize membranes[...]![]()
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A method has been developed which permits one to determine the electrolyte permeation velocities and the membrane system permeability from measurements of the membrane potential as a function of time. The method has been applied to a cation-exch[...]![]()
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Membrane distillation (MD) is one of the non-isothermal membrane separation processes used in various applications such desalination, environmental/waste cleanup, food, etc. It is known since 1963 and is still being developed at laboratory stage[...]![]()
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Valdés, Jorge ; Román, Domingo ; Álvarez Galindo, Gabriel ; Ortlieb, Luc ; Guiñez, Marcos | Elsevier Science BV | 2008-05Physical-chemical parameters (temperature, salinity, dissolved oxygen, nutrients, and chlorophyll concentration) of surface waters were used to evaluate the influence of biological and physical processes over the metal concentrations (Cd, Ni, V,[...]![]()
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Peña, Luis ; Godino Gómez, María Paz ; Mengual Cabezón, Juan Ignacio | Elsevier Science BV | 1998-05-27A method is proposed that permits to evaluate the net membrane distillation coefficient. The method, which completes and is based on a model previously reported, emphasizes the influence of the unstirred boundary layers on the membrane distillat[...]![]()
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The exact evolution equations for the conserved densities of a one-component two-phase fluid are reduced, in each bulk phase to the corresponding linearized hydrodynamic equations and at the interface, to boundary conditions, relating the jump i[...]![]()
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We introduce a slight modification of the definition of migrativity for aggregation functions that allows useful characterization of this property. Among other things, in this context we prove that there are no t-conorms, uninorms or nullnorms t[...]![]()
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Álvarez Solas, Jorge ; Charbit, Sylvie ; Ramstein, Gilles ; Paillard, Didier ; Dumas, Christophe ; Ritz, Catherine ; Roche, Didier M. | Elsevier Science BV | 2011-04A coupled climate-ice-sheet model is used to investigate the response of climate at the millennial time scale under several global warming long-term scenarios, stabilized at different levels ranging from 2 to 7 times the pre-industrial CO2 level[...]![]()
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Cojocaru, C. ; Khayet Souhaimi, Mohamed ; Zakrzewska-Trznadel, G. ; Jaworska, A. | Elsevier Science BV | 2009-08-15The factorial design of experiments and desirability function approach has been applied for multiresponse optimization in pervaporation separation process. Two organic aqueous solutions were considered as model mixtures, water/acetonitrile and w[...]![]()
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A central compositional orthogonal design has been applied for modeling and optimization of sweeping gas membrane distillation process. The effects of the operational parameters, liquid temperature, gas temperature, liquid flow rate and gas flow[...]![]()
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Rosado Vélez, Jaime ; Aranda, V. M. ; Blanco Ramos, Francisco ; Arqueros Martínez, Fernando | Elsevier Science BV | 2015-07-01An experimental method to characterize the crosstalk and afterpulsing in silicon photomultipliers has been developed and applied to two detectors fabricated by Hamamatsu. An analytical model of optical crosstalk that we presented in a previous p[...]![]()
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Moreno Salinas, David ; Moreno Salinas, Raúl ; Pereira, Augusto ; Aranda, Joaquín ; Cruz García, Jesús Manuel de la | Elsevier Science BV | 2019-03This paper describes the use of Kernel Ridge Regression (KRR) and Kernel Ridge Regression Confidence Machine (KRRCM) for black box identification of a surface marine vehicle. Data for training and test have been obtained from several manoeuvres [...]![]()
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Ruiz Cembranos, José Alberto ; Coma Díaz, Mario ; Martín Moruno, María del | Elsevier Science BV | 2019-01-10In this letter we reflect on the propagation of gravitational waves in alternative theories of gravity, which are typically formulated using extra gravitational degrees of freedom in comparison to General Relativity. We propose to understand tha[...]![]()
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Arqueros Martínez, Fernando ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Morcuende, D. ; Nieto, D. ; Nievas Rosillo, Mireia ; Peñil del Campo, Pablo ; Rosado, J. ; Saha, Lab ; Tejedor, L. A. ; otros, ... | Elsevier Science BV | 2019-09The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based veryhigh-energy gamma-ray astronomy. It will improve the sensitivity of current ground-based instruments by a factor of five to twenty, depending on th[...]![]()
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We analyze the peculiarities of the motional narrowing effect in disordered one-dimensional Frenkel chains with off-diagonal disorder, induced by uncorrelated Gaussian fluctuations in the positions of the host units. A clear difference in the sc[...]![]()
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Kirchner Bossi, N. ; Prieto, L. ; García Herrera, Ricardo ; Carro Calvo, L. ; Salcedo Sanz, S. | Elsevier Science BV | 2013-05A wind clustering methodology capable of dynamically characterizing and long-term reconstructing daily surface wind series is introduced and tested for six meteorological towers at different wind farms in Spain, for the period 1871–2009. On this[...]![]()
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Medina Valdés, L. ; Pérez Liva, Mailyn ; Camacho, J. ; Udías Moinelo, José Manuel ; Herraiz, J. L. ; Gonzalez Salido, N. | Elsevier Science BV | 2015This work describes preliminary results of a two-modality imaging system aimed at the early detection of breast cancer. The first technique is based on compounding conventional echographic images taken at regular angular intervals around the ima[...]![]()
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Benito García, Jaime ; Fraile Prieto, Luis Mario ; Sánchez-Tembleque Verbo, Victor ; Vedia Fernández, María Victoria | Elsevier Science BV | 2020-02-10We report on the first measurement of the half-lives of K-pi = 11(-) and 12(+) four-quasiparticle states in the even-even nucleus W-178. The sub-nanosecond half-lives were measured by applying the centroid shift method to data taken with LaBr3(C[...]![]()
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Cruz, A. ; Fernández Pérez, Luis Antonio ; Íñiguez, D. ; Tarancón, A. | Elsevier Science BV | 1996-05-02We have made a study of several update algorithms using the XY model. We find that sequential local overrelaxation is not ergodic at the scale of typical Monte Carlo simulation time. We have introduced a new multisite microcanonical update metho[...]![]()
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Herrera Fernández, José María ; Sánchez Brea, Luis Miguel ; Bernabeu Martínez, Eusebio | Elsevier Science BV | 2013-06-15Diffractive optical elements (DOEs) are commonly used for beam shaping in the far field. In the present work, we develop an algorithm for near-field beam shaping using a double DOE system with binary modulation, so that it can be easily implemen[...]![]()
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In a previous paper [2], the authors proved that a property of ‘acyclity’ in fuzzy preference relations was anecessary and sufficientcondition for the existence of unfuzzy nondominated alternatives when such aset of alternatives is finite. In th[...]![]()
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We construct a new family of N -fold supersymmetric systems which is referred to as “type B”. A higher-derivative representation of the N -fold supercharge for this new family is given by a deformation of the type A N -fold supercharge. By utili[...]![]()
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This paper presents an approach to the local stereo correspondence problem. The primitives or features used are groups of collinear connected edge points called segments. Each segment has several associated attributes or properties. We have veri[...]![]()
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Alcaraz Romo, Lorena ; García Díaz, Irene ; González, Laura ; Rabanal, María Eugenia ; Urbieta Quiroga, Ana Irene ; Fernández, Paloma ; López, Félix A. | Elsevier Science BV | 2019-06Several phases with variable stoichiometry ZnxMn3-xO4 (with x = 0.25, 0.85 and 1) and ZnO have been obtained from the black mass, a widely generated residue of wasted alkaline batteries. The obtained samples have been characterized by X-ray diff[...]![]()
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Ballesteros, H. G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio | Elsevier Science BV | 1996-06-20We present the results of a Monte Carlo simulation of the RP^(2) model in three dimensions with negative coupling. We observe a second order phase transition between the disordered phase and an antiferromagnetic, unfrustrated, ordered one. We me[...]![]()
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Oller, J. A. ; Oset, E. ; Guerrero, F. ; Peláez Sagredo, José Ramón | Elsevier Science BV | 2000-01-31A non-perturbative method [1] which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe meson-meson interactions up to ?s![]()
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In this paper three families of test statistics for testing nonadditivity in loglinear models are presented under the assumption of either Poisson, multinomial, or product-multinomial sampling. These new families are based on the phi-divergence [...]![]()
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In this work we present the results of a complete calculation of the gamma gamma --> pi(0) pi(0) amplitude to leading order in the large N approximation (N being the number of Goldstone bosons) up to order m(pi)(2)/F-2, The amplitude turns to b[...]![]()
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Martínez Matos, Óscar ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Rodrigo Martín-Romo, José Augusto ; Janz, Siegfried ; Xu, Dan-Xia ; Delâge, André | Elsevier Science BV | 2007-02-01We propose a new type of arrayed waveguide grating (AWG) multiplexer/demultiplexer based on modified group refractive index. This device is composed by an array of straight and parallel waveguides of equal length and each waveguide consist of tw[...]![]()
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A plate-and-frame membrane module has been used in sweeping gas membrane distillation process. Both numerical simulation and experimental studies have been carried out. The numerical simulation focuses on modelling heat, mass and momentum transp[...]![]()
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Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Sciretti, D. ; Tarancón, A. | Elsevier Science BV | 2005-11-10We investigate by means of Monte Carlo simulation and finite-size scaling analysis the critical properties of the three dimensional O (5) non-linear ? model and of the antiferromagnetic RP^(2) model, both of them regularized on a lattice. High a[...]![]()
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Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; Mengual Cabezón , Juan Ignacio | Elsevier Science BV | 1994-10-10The apparent electro-osmotic permeability, W, of three ion-exchange membranes has been obtained under different experimental conditions. The behaviour of W as a function of the current density, I, shows the following characteristics: (i) at suff[...]![]()
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In this paper, we introduce kinds of fuzzy paracompactness on fuzzy subsets, relative to a fuzzy topological space. For this, we use the Luo's definitions of fuzzy aracompactness. We give the relationship between [alpha]-paracompactness and the [...]