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Elsevier Science BV |
Documentos disponibles de esta editorial (389)
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We study the maximumn umber of infected individuals observed during an epidemic for a Susceptible–Infected–Susceptible (SIS) model which corresponds to a birth–death process with an absorbing state. We develop computational schemes for the corre[...]![]()
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We study the maximumn umber of infected individuals observed during an epidemic for a Susceptible–Infected–Susceptible (SIS) model which corresponds to a birth–death process with an absorbing state. We develop computational schemes for the corre[...]![]()
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Motivated by practical issues, a new stochastic order for random variables is introduced by comparing all their percentile residual life functions until a certain instant. Some interpretations of these stochastic orders are given, and various pr[...]![]()
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We consider a biparametric family of BRS invariant regularization methods of SU (N) Chem-Simons theory (the parameters defining the family taking arbitrary values in R2) and show that the one-loop shift k --> k + sign(k) N of the Chern-Simons p[...]![]()
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Vacuum membrane distillation (VMD) has been studied as a separation process to remove volatile organic compounds from aqueous streams. A vapour pressure difference across a microporous hydrophobic membrane is the driving force for the mass trans[...]![]()
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The covariant functional Schrödinger formalism is used to study thermal equilibrium for a scalar field in Robertson Walker spacetimes. It is found that thermal equilibrium can be maintained for field masses, coupling constants and geometries sat[...]![]()
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The temperature evolution of the chiral condensates in a gas made of pions, kaons and etas is studied within the framework of SU(2) and SU(3) Chiral Perturbation Theory. We describe the temperature dependence of the quark condensates by using th[...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Olea Ariza, Javier | Elsevier Science BV | 2010-11Ti implantation in Si with very high doses has been performed. Subsequent Pulsed Laser Melting (PLM) annealing produces good crystalline lattice with electrical transport properties that are well explained by the Intermediate Band (IB) theory. T[...]![]()
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García Villaluenga, Juan Pedro ; Seoane Rodríguez, Benjamín ; Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Elsevier Science BV | 2006-04-05Mass transport of mixtures of water and methanol through a Nation membrane as a function of the temperature difference between the two sides of the membrane was measured under different experimental conditions. The results show that the composit[...]![]()
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A three-branch all-fibre optic interferometer (3B-FOI) based on a Mach-Zehnder configuration is proposed. We have studied the feasibility of using it to measure two phase perturbations. Results are presented which show the linearity of the detec[...]![]()
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We report on a theoretical study of the electronic structure of quasiperiodic, quasi-one-dimensional systems where fully three-dimensional interaction potentials are taken into account. In our approach, the actual physical potential acting upon [...]![]()
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We present a topological mechanism of discretization, which gives for the fundamental electric charge the value q(0) = root (h) over bar c = 5.29 x 10(-19) C, about 3.3 times the electron charge. Its basis is the following recently proved proper[...]![]()
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García Hernansanz, Rodrigo ; García Hemme, Eric ; Montero Álvarez, Daniel ; Olea Ariza, Javier ; Prado Millán, Álvaro del ; Mártil de la Plaza, Ignacio ; Voz Sánchez, Cristobal ; Gerling, Luis ; Puigdollers, Joaquin ; Alcubilla, R. | Elsevier Science BV | 2018-10Heterojunction solar cells based on molybdenum sub-oxide (MoOx) deposited on n-type crystalline silicon have been fabricated. The hole selective character of MoOx is explained by its high workfunction, which causes a strong band bending in the S[...]![]()
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Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; García Villaluenga, Juan Pedro ; Seoane Rodríguez, Benjamín | Elsevier Science BV | 2004-05The mass flow originated when two methanol–water solutions of different methanol concentrations are separated by a membrane has been studied for two Nafion membranes. From the experimental results, the methanol and water permeabilities have been[...]![]()
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El Abbassi, A. ; Khayet Souhaimi, Mohamed ; Kiai, H. ; Hafidi, A. ; García Payo, María del Carmen | Elsevier Science BV | 2013-02-05Olive oil extraction industry is a very important economic activity in the entire Mediterranean basin. The olive mill wastewaters (OMWs) are seasonally produced with large volumes of toxic and polluting wastewaters. Amongst other organic constit[...]![]()
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El Abbassi, A. ; Kiai, H. ; Hafidi, A. ; García Payo, María del Carmen ; Khayet Souhaimi, Mohamed | Elsevier Science BV | 2012-09-19Direct contact membrane distillation (DCMD) process was applied for olive mill wastewater (OMW) treatment. Three commercial polytetrafluoroethylene (PTFE) membranes with different pore sizes (TF200 of 0.2 mu m, TF450 of 0.45 mu m and TF1000 of 1[...]![]()
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Direct contact membrane distillation (DCMD) is proposed for processing low and intermediate level radioactive liquid wastes by means of surface modified flat sheet membranes to produce distilled water and to reduce the volume of the radioactive [...]![]()
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Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Elsevier Science BV | 2010-01-21The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identific[...]![]()
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It is argued that the one-loop effective action for space like noncommutative (i) lambda phi(4) scalar field theory and (ii) U(1) gauge theory does not exist. This indicates that such theories are not renormalizable already at one loop order and[...]![]()
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Gutierrez Reyes, Daniel ; Scimemi, Ignazio ; Vladimirov, Alexey A. | Elsevier Science BV | 2017-06-10We systematically study the large-qT (or small-b) matching of transverse momentum dependent (TMD) distributions to the twist-2 integrated parton distributions. Performing operator product expansion for a generic TMD operator at the next-to-leadi[...]![]()
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Llanes Estrada, Felipe José ; Peláez Sagredo, José Ramón ; Vicente Vacas, M. J. ; Oset, E. | Elsevier Science BV | 2005-06-13We study the self-energy of the SU(3) antidecuplet coming from two-meson virtual clouds. Assuming that the exotic Theta(+) belongs to an antidecuplet representation with (1710) as nucleon partner, we derive effective Lagrangians that describe t[...]![]()
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Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel | Elsevier Science BV | 2007-12-21The paper describes the different methods, used in the MAGIC experiment, to unfold experimental energy distributions of cosmic ray particles (gamma-rays). Questions and problems related to the unfolding are discussed. Various procedures are prop[...]![]()
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We regularize QCD using the combination of higher covariant derivatives and Pauli-Villars determinants proposed by Slavnov. It is known that for pure Yang-Mills theory the Pauli-Villars determinants generate unphysical logarithmic radiative corr[...]![]()
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Arganda, E. ; Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Elsevier Science BV | 2010-12Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuz'min energy threshold, 6 x 10(19) eV. The anisotropy was measured by the [...]![]()
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Yélamos, Belén ; Núñez, Elena ; Gómez-Gutiérrez, Julián ; Delgado, Carmen ; Pacheco, Beatriz ; Peterson, Darrell L. ; Gavilanes, Francisco | Elsevier Science BV | 2001-03-09Circular dichroism and fluorescence spectroscopy have been employed to study the urea unfolding mechanism of a recombinant form of the major core protein of feline immunodeficiency virus (FIV-rp24) and its native tryptophan mutants. The equilibr[...]![]()
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Piquero Sanz, Gemma María ; Borghi, Riccardo ; Santarsiero, Massimo | Elsevier Science BV | 2001-07-15From a recently proposed technique, used to determine the modal weights of beams made up of incoherent superpositions of Hermite-Gaussian (PIG) modes, we derive the analytical expression of a family of functions which are biorthogonal to the squ[...]![]()
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A new family of test statistics based on Rényi's divergence is introduced for the hypothesis that the coefficients of variation of k normal populations are equal. A comparative simulation study is carried out concerning the size and power of the[...]![]()
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The empirical identification of bound states of gluons has remained a central goal of hadron spectroscopy. We suggest an experimentally challenging, but model-independent way to assess which zero charge, isospin-zero mesons have a large gluonium[...]![]()
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Noncommutative IR singularities and UV/IR mixing in relation with the Goldstone theorem for complex scalar field theory are investigated. The classical model has two coupling constants, lambda(1) and lambda(2), associated to the two noncommutati[...]![]()
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The infrared behaviour of vertex functions in an SU(N) Yang Mills theory in Landau gauge is investigated employing a skeleton expansion of the Dyson-Schwinger equations. The three- and four-gluon vertices become singular if and only if all exter[...]![]()
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González Herrera, Elvira María ; Anguita, J. V. ; Villegas, J. E. ; Vicent López, José Luis | Elsevier Science BV | 2003-05Ordered arrays of submicrometric Ni lines have been fabricated in sputtered Nb films. Magnetotransport R(H) and (I, V) curves were measured close to the critical temperature using a cross-shape bridge that allows us to apply current in two direc[...]![]()
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Godino Gómez, María Paz ; Barragán García, Vicenta María ; García Villaluenga, Juan Pedro ; Ruiz Bauzá, Carlos ; Seoane Rodríguez, Benjamín | Elsevier Science BV | 2006-09-29The mass flux originated when two methanol-water solutions of different methanol concentration are separated by a Nation 117 membrane in acid (H+) and different alkali metal forms (Li+, Na+, K+, Rb+, Cs+) have been measured, as a function of the[...]![]()
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Godino Gómez, María Paz ; Peña, Luis ; Mengual Cabezón, Juan Ignacio ; Rincón, C. | Elsevier Science BV | 1997-02The possibility of obtaining pure water by membrane distillation, from brines rejected in other water production operations has been considered. Membrane distillation experiments have been carried out by using two PTFE porous hydrophobic membran[...]![]()
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Llanes Estrada, Felipe José ; Guo, F.-K ; Hanhart, C ; Meißner, U.-G | Elsevier Science BV | 2011-09-20Hadron masses show a specific dependence on the quark masses. Therefore, the variation of these masses can cause a resonance in a hadronic scattering amplitude to become a bound state. Consequently, the amplitude exhibits a non analytic behavior[...]![]()
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Salcedo Sanz, S. ; García Herrera, R. ; Aybar Ruíz, A. ; Camacho Gómez, C. ; Alexandre, E. | Elsevier Science BV | 2018-10-15In this paper we deal with a problem of representative measuring points selection for long-term wind power analysis. It has direct applications such as wind farm prospective location or long-term power generation prediction in wind-based energy [...]![]()
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Polyethersulfone (PES) hollow fiber membranes were prepared by both wet spinning technique, without gas-gap, and dry/wet spinning technique under different gas-gaps, namely, air, oxygen, nitrogen, carbon dioxide, argon and humid air. All spinnin[...]