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Elsevier Science BV |
Documentos disponibles de esta editorial (389)
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Scigaj, Mateusz ; Gázquez, Jaume ; Varela del Arco, María ; Fontcuberta Griñó, Josep ; Herranz Casabona, Gervasi ; Sánchez Barrera, Florencio | Elsevier Science BV | 2015-11-15Interfaces between (110) and (111)SrTiO_3 (STO) single crystalline substrates and amorphous oxide layers, LaAlO_3 (a-LAO), Y:ZrO_2 (a-YSZ), and SrTiO_3 (a-STO) become conducting above a critical thickness tc. Here we show that t_c for a-LAO is n[...]texto impreso
Menéndez Calleja, María Luisa ; Pardo Llorente, Leandro ; Pardo Llorente, María del Carmen | Elsevier Science BV | 2009-02-01In this paper we present recentered confidence sets for the parameters of a logistic regression model based on preliminary minimum phi-divergence estimators. Asymptotic coverage probabilities are given as well as a simulation study in order to a[...]texto impreso
We study in this paper a modification of continued fractions defined by the author, such that its lexicographic order coincides with the linear order of real numbers. This fact has beautiful consequences in Topology. Indeed, it gives the possibi[...]texto impreso
We report a relativistic many-body calculation for the hybrid meson spectrum utilizing a QCD inspired Coulomb gauge Hamiltonian. Our approach is comprehensive and unifies the quark and gluon sectors. The vacuum and quasiparticle properties are g[...]texto impreso
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Darboux transformation is reconsidered for the supersymmetric KdV system. By iterating the Darboux transformation, a supersymmetric extension of the Crum transformation is obtained for the Manin-Radul SKdV equation, in doing so one gets Wronskia[...]texto impreso
A combined scanning electron microscope-scanning tunneling microscope (SEM-STM) system has been used to investigate surface topographic and electronic properties of YBa2Cu3O7-x (YBCO) and Bi2Sr2Ca-Cu2O8+x (Bi-2212) single crystals. Current imagi[...]texto impreso
In this paper we present a vectorial Darboux transformation, in terms of ordinary determinants, for the supersymmetric extension of the Korteweg-de Vries equation proposed by Manin and Radul. It is shown how this transformation reduces to the Ko[...]texto impreso
We construct Darboux transformations for the super-symmetric KP hierarchies of Manin-Radul and Jacobian types. We also consider the binary Darboux transformation for the hierarchies. The iterations of both type of Darboux transformations are bri[...]texto impreso
Quiroga Mellado, Juan Antonio ; Servín Guirado, Manuel ; Cuevas de la Rosa, Francisco Javier | Elsevier Science BV | 2001-12-15First- and second-order recursive Digital Phase Locked Loops (DPLLs) have been used recently in fringe data processing because it is the fastest way to obtain the unwrapped phase of a carrier frequency fringe pattern due to its minimal computati[...]texto impreso
Arganda, E. ; Arqueros Martínez, Fernando ; García Pinto, Diego ; Minaya Flores, Ignacio Andrés ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime | Elsevier Science BV | 2012-04Atmospheric conditions at the site of a cosmic ray observatory must be known for reconstructing observed extensive air showers. The Global Data Assimilation System (GDAS) is a global atmospheric model predicated on meteorological measurements an[...]texto impreso
Vegas Azcárate, Ignacio ; Antoranz Canales, Pedro ; Miranda Pantoja, José Miguel ; Franco Peláez, Francisco Javier | Elsevier Science BV | 2017-01-01A variable width pulse generator featuring more than 4-V peak amplitude and less than 10-ns FWHM is described. In this design the width of the pulses is controlled by means of the control signal slope. Thus, a variable transition time control ci[...]texto impreso
Two types of bisphenol monomers, Bisphenol A (BPA) and Tetramethyl Bisphenol A (TMBPA), with different concentrations of bisphenol aqueous solution (0.5% to 2.%w/v) and various interfacial polymerisation times (10 s, 30 s and 60 s) in the fixed [...]texto impreso
A system of an array of side-coupled quantum dots attached to a quantum wire is studied theoretically. Transport through the quantum wire is investigated by means of a noninteracting Anderson tunneling Hamiltonian. Analytical expressions of the [...]texto impreso
Carrasco, J. A. ; Nebreda Manjón, Jenifer ; Peláez Sagredo, José Ramón | Elsevier Science BV | 2015-10-07We apply a recently developed dispersive formalism to calculate the Regge trajectories of the f_2(1270), f´_ 2(1525) and K^?(892) mesons. Trajectories are calculated, not fitted to a family of resonances. Assuming that these resonances can be tr[...]texto impreso
The intrinsic helix conformation of the DNA strands is known to be the key ingredient of control of the electric current through the molecule by the perpendicular (gate) electric field. We show theoretically that Bloch oscillations in periodic s[...]texto impreso
We study the beta functions of the quartic and Yukawa couplings of General Relativity and Unimodular Gravity coupled to the ??4 and Yukawa theories with masses. We show that the General Relativity corrections to those beta functions as obtained [...]texto impreso
This overview demonstrates the potential of historical documents from Ecuador, Peru, Bolivia, Chile and Argentina, for developing continuous and precise reconstructions of past climatic variations in South America, during past centuries. We prov[...]texto impreso
Iglesias Freire, O. ; Jaafar, M. ; Pérez García, Lucas ; Abril, Abril, de ; Vázquez, M. ; Asenjo, A. | Elsevier Science BV | 2014-04The proximity effect in the collective behavior of arrays of magnetic nanostripes is currently a subject of intensive research. The imperative of reducing the size and distances between elements in order to achieve higher storage capacity, faste[...]texto impreso
Torcal Milla, Francisco José ; Sánchez Brea, Luis Miguel ; Bernabeu Martínez, Eusebio | Elsevier Science BV | 2008-12-01Steel tape gratings are used in different metrology applications. As the period of these gratings was large (around 100?m,), its analytical study has been performed, up to date, using a geometrical approach. Nowadays, steel tape gratings can be [...]texto impreso
Carmona, J. M. ; Cruz, A. ; Fernández Pérez, Luis Antonio ; Jiménez, S. ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Pech, J. ; Ruiz Lorenzo, J. J. ; Tarancón, A. ; Téllez, P. | Elsevier Science BV | 2003-05-08It is shown that a bosonic formulation of the double-exchange model, one of the classical models for magnetism, generates dynamically a gauge-invariant phase in a finite region of the phase diagram. We use analytical methods, Monte Carlo simulat[...]texto impreso
We summarise results on the infrared behaviour of Landau gauge QCD from the Green's functions approach and lattice calculations. Approximate, nonperturbative solutions for the ghost, gluon and quark propagators as well as first results for the q[...]texto impreso
Manzanares Ituarte, Ana ; Calvo Padilla, María Luisa ; Chevalier dl Río, Margarita ; Lakshminarayanan, Vasudevan | Elsevier Science BV | 1998-12We discuss a formalism to characterize degraded edge images formed in a diffraction limited system (with circular pupil of unit radius) under conditions of incoherent illumination. We introduce a novel definition of degraded edges and consider t[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; Imaña Pascual, José Luis | Elsevier Science BV | 2002-03-01The influence of an alternating (AC) sinusoidal perturbation, of known frequency and small amplitude, superimposed to the usual applied continuous (DC) signal in a desalination electrodialysis process has been studied. The experiments were carri[...]texto impreso
Melle Hernández, Sonia ; Gómez Calderón, Óscar ; Carreño Sánchez, Fernando ; Cabrera Granado, Eduardo ; Antón Revilla, Miguel Ángel ; Jarabo Lallana, Sebastián | Elsevier Science BV | 2007-11-01The effect of ion density on slow light propagation enabled by coherent population oscillations has been experimentally investigated for highly doped erbium fibers at room temperature. We found that fractional delay increases with ion density. A[...]