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Documentos disponibles de esta editorial (389)
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In General Topology, there is a close paralellism between the theories of convergence of nets and of filters, in which "subnet" corresponds to "finer filter", but this relationship depends on the notion of subnet that one uses. Various authors h[...]![]()
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In this paper we deal with the problem of obtaining a random procedure for generating fuzzy measures. We use the fact that the polytope of fuzzy measures is an order polytope, so that it has special properties that allow to build a uniform algor[...]![]()
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For the model of independence in a two way contingency table, shrinkage estimators based on minimum phi-divergence estimators and phi-divergence statistics are considered. These estimators are based on the James-Stein-type rule and incorporate t[...]![]()
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Rosado Vélez, Jaime ; Blanco Ramos, Francisco ; Arqueros Martínez, Fernando | Elsevier Science BV | 2014-03The absolute value of the air-fluorescence yield is a key parameter for the energy reconstruction of extensive air showers registered by fluorescence telescopes. In previous publications, we reported a detailed Monte Carlo simulation of the air-[...]![]()
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The estimation problem of the parameters in a symmetry model for categorical data has been considered for many authors in the statistical literature (for example, Bowker (1948) [1], Ireland et al. (1969) [2], Quade and Salama (1975) [3] Cressie [...]![]()
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The thermal membrane potential across a cation-exchange membrane has been determined under different experimental situations. In all cases, a clear linear dependence between the thermal membrane potential, Delta Psi, and the temperature differen[...]![]()
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We develop an alternative formulation of the symmetry breaking sector of the Standard Model as a gauged non-linear sigma model (NLSM) following the philosophy of the Chiral lagrangian approach, which is the only compatible with all the experimen[...]![]()
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We discuss the existence of de Sitter inflationary solutions for the string-inspired fourth-derivative gravity theories with dilaton field. We consider a space-time of arbitrary dimension D and an arbitrary parametrization of the target space me[...]![]()
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In this letter we show how it is possible to obtain the large N(f) limit of chiral perturbation theory (chi-PT) in the chiral limit. In particular, we compute explicitly the Nambu-Goldstone boson (NGB) elastic scattering amplitude to leading ord[...]![]()
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Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; García Villaluenga, Juan Pedro ; Seoane Rodríguez, Benjamín | Elsevier Science BV | 2004-06-15Electroosmosis experiments through a Nafion membrane have been performed using methanol–water KCl solutions in different experimental situations. The influence on the electroosmotic transport of the percentage of methanol on solvent at different[...]![]()
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Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1995-03-15The behaviour of the kurtosis parameter of a partially coherent beam that freely propagates is investigated. A general classification scheme of light beams is given in terms of the number of extremals of the kurtosis in free space. Propagation t[...]![]()
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In this work, we have derived a depolarization metric, named Q(M) here, from the nine bilinear constraints between the 16 Mueller-Jones matrix elements, reported previously by several authors following different approaches. This metric Q(M) is s[...]![]()
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In this paper we stress the relevance of a particular family of fuzzy sets, where each element can be viewed as the result of a classification problem. In particular, we assume that fuzzy sets are defined from a well-defined universe of objects [...]![]()
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In this paper we present some results concerning the vertices of the set of fuzzy measures being at most k-additive. We provide an algorithm to compute them. We give some examples of the results obtained with this algorithm and give lower bounds[...]![]()
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The question of the dependence of the topological charge q of a gauged Skyrmion, on the gauge field, is studied quantitatively. Two examples, both gauged with SO (2) are studied and contrasted: i) The O (3) model in 2 + 1 dimensions, and ii) The[...]![]()
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We study the critical properties of the monopole-percolation transition in U(1) lattice gauge theory coupled to scalars at infinite (? = 0) gauge coupling. We find strong scaling corrections in the critical exponents that must be considered by [...]![]()
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Alvarez Estrada, R F ; Dobado González, Antonio ; Gómez Nicola, Ángel | Elsevier Science BV | 1993-12-23We discuss the finite temperature extension of the anomalous Wess-Zumino-Witten lagrangian. The finite temperature S1 x S3 compactification makes a structure in disconnected sectors, corresponding to different baryon numbers appear naturally. Th[...]![]()
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Alvarez Estrada, R F ; Dobado González, Antonio ; Gómez Nicola, Ángel | Elsevier Science BV | 1994-04-07We analyze the finite temperature (T) extension of the Wess-Zumino-Witten functional, discussed in a previous work, to one loop in chiral perturbation theory. As a phenomenological application, we calculate finite temperature corrections to the [...]![]()
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Khayet Souhaimi, Mohamed ; Essalhi, M. ; Armenta Déu, Carlos ; Cojocaru, C. ; Hilal, N. | Elsevier Science BV | 2010-10-31A solar thermal and photovoltaic-powered reverse osmosis (RO) desalination plant has been constructed and optimized for brackish water desalination. The central composite experimental design of orthogonal type and response surface methodology (R[...]![]()
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Menéndez Calleja, María Luisa ; Pardo Llorente, Leandro ; Zografos, Konstantinos | Elsevier Science BV | 2009-10-15This paper studies the simultaneous selection of extreme populations from a set of independent populations. Two types of subset selection rules for k populations are proposed and studied. The first type selects one subset of populations that sho[...]![]()
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Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 2006-09-01Several overall parameters are introduced to characterize the linear or circular polarization content of a non-uniformly totally polarized beam over the region of its wavefront where the irradiance is significant. These figures of merit are dete[...]![]()
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U(1) gauge theory on non-commutative Minkowski spacetime in the Feynman-'t Hooft background gauge is studied. In particular, UV divergences and non-commutative IR divergent contributions to the two, three and four-point functions are explicitly [...]![]()
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Piquero Sanz, Gemma María ; Movilla Serrano, Jesús María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | Elsevier Science BV | 1998-04-15A new overall parameter is defined, namely, the generalized degree of polarization, which involves the spatial distribution of the polarization of a light beam. This parameter is introduced on the basis of a general treatment recently proposed [[...]![]()
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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 ; Satalecka, Konstanzja ; Scapin, Valeria | Elsevier Science BV | 2012-02MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma. Since autumn 2009 both telescopes have been working together in stereoscopic mode, providing a significant improvement with respect to th[...]![]()
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Barrio Uña, Juan Abel ; Contreras González, José Luis ; Domínguez-Adame Acosta, Francisco ; Fonseca González, Mª Victoria ; Fidalgo, David Friedrich Carreto ; López Moya, Marcos ; Nievas Rosillo, Mireia | Elsevier Science BV | 2017-09MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the telescopes only during dark time would severely limit the duty cy[...]![]()
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Peláez Sagredo, José Ramón ; Brodsky, S. J ; Merino, C. ; Toumbas, N. | Elsevier Science BV | 2000-06We review our recent works on tests of perturbative QCD, inspired by the relation between the hadronic decay of the ? lepton and the e?e? annihilation into hadrons. First, we present a set of commensurate scale relations that probe the self-cons[...]![]()
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We reduce the vectorial binary Darboux transformation for the Manin-Radul supersymmetric KdV system in such a way that it preserves the Manin-Radul-Mathieu supersymmetric KdV equation reduction. Expressions in terms of bosonic Pfaffians are prov[...]![]()
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Alonso, J. L. ; Carmona, J. M. ; Clemente Gallardo, J. ; Fernández Pérez, Luis Antonio ; Íñiguez, D. ; Tarancón, A. ; Ullod, C. L. | Elsevier Science BV | 1996-05-23We study the phase diagram of the four dimensional king model with first and second neighbour couplings, especially in the antiferromagnetic region, by using Mean Field and Monte Carlo methods. From the latter, all the transition lines seem to b[...]![]()
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Álvarez Galindo, Gabriel ; Martínez Alonso, Luis ; Medina Reus, Elena | Elsevier Science BV | 2015-08-15We apply the method we have described in a previous paper (2013) to determine the phase structure of asymptotic zero densities of the standard cubic model of non-Hermitian orthogonal polynomials. We provide a complete description of the two phas[...]![]()
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The paraxial estimator (PE) is a parameter quantifying the paraxiality of a light beam. Even if some of its features were previously tackled, key details on its behavior were not fully presented. This paper robustly presents the physical meaning[...]![]()
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Antonelli, S. ; Bellacci, M. ; Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Sarno, R. ; Tarancón, A. ; Bartoloni, A. ; Battista, C. ; Cabibbo, N. ; Cabasino, S. ; Panizzi, E. ; Paolucci, P. S. ; Todeesco, G. M. ; Torelli, M. ; Tripiccione, R. ; Vicini, P. | Elsevier Science BV | 1995-02-02Polyakov type loops are responsible for the difference between quenched and unquenched finite size effects on the QCD mass spectrum. With a numerical simulation, using appropriate sea quark spatial boundary conditions, we show that we can align [...]![]()
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We look in Euclidean R-4 for associative star products realizing the commutation relation [x(mu), x(upsilon)] i Theta(mu upsilon)(x), where the noncommutativity parameters Theta(mu upsilon) depend on the position coordinates x. We do this by ad[...]![]()
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Relaño Pérez, Armando ; Molina, R. A. ; Retamosa Granado, Joaquín ; Muñoz, L. ; Faleiro, E. | Elsevier Science BV | 2007-01-04Sequences of energy levels in nuclei are often plagued with missing levels whose number and position are unknown. It is also quite usual that all the quantum numbers of certain levels cannot be experimentally determined, and thus levels of diffe[...]![]()
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Kami?ski, Robert ; Garcia Martin, R. ; Peláez Sagredo, José Ramón ; Ruiz de Elvira, J. | Elsevier Science BV | 2013-01Use of the new and precise dispersive equations with imposed crossing symmetry condition to solve the longstanding puzzle in the parameters of the f_o(500), as well as the f_o(980) is presented. This puzzle is finally being settled thanks to ana[...]![]()
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García Payo, María del Carmen ; Essalhi, M. ; Khayet Souhaimi, Mohamed | Elsevier Science BV | 2009-09-15Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) hollow fiber membranes were prepared by the dry/wet spinning technique at different copolymer concentrations from 17 to 24 wt%. All the spinning parameters were kept constant except the[...]![]()
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Nasef, M. M. ; Zubir, N. A. ; Ismail, A. F. ; Dahlan, K. Z. M. ; Saidi, H. ; Khayet Souhaimi, Mohamed | Elsevier Science BV | 2006-06-01Polymer electrolyte pore-filled membranes, for possible use in direct methanol fuel cells (DMFCs), have been prepared by radiochemical grafting of styrene into porous poly(vinylidene fluoride) (PVDF) films using simultaneous irradiation with an [...]![]()
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The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nucl[...]![]()
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Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1996-08-15The propagation laws of the intensity moments of a laser beam through ABCD optical systems are generalized to include pure phase transmittances. This is done by representing the behaviour of such transmittances by means of a 4 x 4 matrix, hi, wh[...]![]()
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Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Tarancón, A. | Elsevier Science BV | 1995-04We propose a family of renormalization group transformations characterized by free parameters that may be tuned in order to reduce the truncation effects. As a check we test them in the three dimensional XY model. The Schwinger-Dyson equations a[...]![]()
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Several optical arrangements using non-uniformly polarized fields are proposed for generating beams with spin and/or orbital angular momentum. By choosing adequately the input beam polarization and the characteristics of the different proposed s[...]![]()
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Gaidarov, M. K. ; Moumene, I. ; Antonov, A. N. ; Kadrev, D. N. ; Sarriguren, P. ; Moya de Guerra, Elvira | Elsevier Science BV | 2020-12The neutron skin of nuclei is an important fundamental property, but its accurate measurement faces many challenges. Inspired by charge symmetry of nuclear forces, the neutron skin of a neutron-rich nucleus is related to the difference between t[...]![]()
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Llanes Estrada, Felipe José ; Cotanch, Stephen R. ; Bicudo, Pedro J. ; Ribeiro, J. Emilio ; Szczepaniak, Adam | Elsevier Science BV | 2002-11-04Implementing many-body techniques successful in other fields, we report a glueball Regge trajectory emerging from diagonalizing a confining Coulomb gauge Hamiltonian for constituent gluons. Through a BCS vacuum ansatz and gap equation, the dress[...]![]()
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Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1994-02-15The beam quality parameter of gaussian fields propagating through axicons is investigated. A simple analytical formula is derived for the output quality parameter in terms of the input beam width, refractive index of the axicon material and the [...]![]()
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The open string on the plane-wave limit of dSn × Sn with constant B2 and dilaton background fields is canonically quantized. This entails solving the classical equations of motion for the string, computing the symplectic form, and defining from [...]![]()
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We examine the quark mass dependence of the pion vector form factor, particularly the curvature (mean quartic radius). We focus our study on the consequences of assuming that the coupling constant of the ? to pions, g??? , is largely independent[...]![]()
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The quasi-free scattering reactions C-11(p, 2p) and C-10,C-11,C-12(p, pn) have been studied in inverse kinematics at beam energies of 300-400 MeV/u at the (RB)-B-3-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in [...]