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Elsevier |
Documentos disponibles de esta editorial (2214)
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The useful mutual information statistic is considered and its asymptotic properties are investigated either considering random sampling or stratified random sampling. Under different assumptions, it is shown that the asymptotic distribution of t[...]![]()
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We prove the existence of a finite extinction time for the solutions of the Dirichlet problem for the total variation flow. For the Neumann problem, we prove that the solutions reach the average of its initial datum in finite time. The asymptoti[...]![]()
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Given a Hamiltonian system on a fiber bundle, the Poisson covariant formulation of the Hamilton equations is described. When the fiber bundle is a G-principal bundle and the Hamiltonian density is G-invariant, the reduction of this formulation i[...]![]()
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The authors study the limit case L1,q of the Lorentz- space approximation number ideals Lp,q. It is shown, using a suitable bilinear interpolation theorem that the ideals L1,q are tensor-stable. Moreover a telescoping sum representation theorem [...]![]()
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We study the approximate controllability property for y(t) - Delta phi(y) = u chi(omega), on Omega x (0, T), where Omega is a bounded open set of R-N and omega subset of Omega. First, we show some negative results for the case phi(s) = \s\(m-1)s[...]![]()
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This paper explores the relationship between productivity and sourcing strategies using a sample of Spanish manufacturing firms. In this analysis we use different measures of productivity and alternative ways of grouping firms. Our results indic[...]![]()
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Rodríguez Bouza, Marta ; Paparini, Claudia ; Otero, Xurso ; Herraiz, M. ; Radicella, S. M. ; Abe, Oladipo E. ; Rodríguez Caderot, Gracia | Elsevier | 2017Global or regional Maps of the ionospheric Total Electron Content (TEC) are an efficient tool to monitor the delay introduced by the ionosphere in the satellite signals. Ionospheric disturbance periods are of particular interest because these co[...]![]()
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This study attempts to identify and trace inter-linkages between sovereign and banking risk for each main country in the euro area. To this end, we use an indicator of banking sector risk in each country based on the Contingent Claim Analysis li[...]![]()
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Since the beginnings of the 1980s some energy methods have been introduced as an alternative to comparison principles in order to prove space and time localization of solutions of suitable nonlinear parabolic or elliptic equations. The study of [...]![]()
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A degenerate parabolic system consisting in two continuity equations for densities of charged particles and in the Poisson equation for an electric potential is considered. We show the finite speed of propagation, a waiting time property for the[...]![]()
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Hernández, Francisco L. ; Ruiz Bermejo, César ; Sánchez de los Reyes, Víctor Manuel | Elsevier | 2015-11Let I1 and I2 be arbitrary operator ideals in the sense of Pietsch and E and F be Banach spaces such that the set I1(E,F){set minus}I2(E,F) is non-empty. We give a quite general sufficient condition on the Banach spaces in order to obtain the sp[...]![]()
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Let (X, ?) be a Riemann domain over a complex Fréchet space E, K a compact subset of X and (K) the vector space of all holomorphic germs on K. Given an F-quotient (XF, ?F, ?) of (X, ?) (see the definition below), the canonical mapping ? : X ? X[...]![]()
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Sánchez Guijo, Fermín ; García Olmo, Damián ; Prósper, Felipe ; Martínez, Salvador ; Zapata González, Agustín ; Fernández Avilés, Francisco ; Toledo Aral, Juan José ; Torres, Miguel ; Fariñas, Isabel ; Badimón, Lina ; Labandeira García, José Luis ; García Sancho, Javier ; Moraleda, Jose María | Elsevier | 2019-12-19In the current article we summarize the 15-year experience of the Spanish Cell Therapy Network (TerCel), a successful collaborative public initiative funded by the Spanish government for the support of nationwide translational research in this i[...]![]()
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Cordero, I. ; Jiménez Escobar, María Dolores ; Delgado Sáez, Juan Antonio ; Villegas, L. ; Balaguer Núñez, Luis | Elsevier | 2016-10-01Tropical dry forests are highly endangered ecosystems that have been scarcely studied. Many species within these forests suffer regeneration problems due to unsustainable management regimes. In particular, a regeneration problem has been detecte[...]![]()
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Castillo-Neyra, Ricardo ; Zegarra, Edith ; Monroy, Ynes ; Bernedo, Reyno F. ; Cornejo-Rosello, Ismael ; Paz-Soldan, Valerie A. ; Levy, Michael Z. | Elsevier | 2019-01-25T16:03:20ZIn the city of Arequipa, Peru, a rabid dog was detected in March 2015, marking the reintroduction of the rabies virus in the area; more rabid dogs have been detected since then. The presence of free-roaming dogs in Arequipa seems to be higher in[...]![]()
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Makarov, Valeri A. ; Nekorkin, Vladimir I. ; Kazantsev, V.B. ; Velarde, Manuel G. | Elsevier | 1997-02-01The spatio-temporal dynamics of discrete lattices of coupled bistable elements is considered. It is shown that both regular and chaotic spatial field distributions can be realized depending on parameter values and initial conditions. For illustr[...]![]()
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Ruiz-Grosso, Paulo ; Miranda, J. Jaime ; Gilman, Robert H. ; Walker, Blake Byron ; Carrasco-Escobar, Gabriel ; Varela-Gaona, Marco ; Diez-Canseco, Francisco ; Huicho, Luis ; Checkley, William ; Bernabé-Ortiz, Antonio | Elsevier | 2019-02-06T14:52:12ZPURPOSE: To map the geographical distribution and spatial clustering of depressive symptoms cases in an area of Lima, Peru. METHODS: Presence of depressive symptoms suggesting a major depressive episode was assessed using a short version of the [...]![]()
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Environmentally friendly measures are needed to achieve natural pest control. A relationship between landscape structure and Bactrocera oleae, the main olive grove pest, indicated a general association between complex landscapes and reduced abun[...]![]()
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Esteban Fernández, Diego ; Gómez Gómez, M.Milagros ; Cañas, Benito ; Verdaguer, J.M. ; Ramírez, R. ; Palacios Corvillo, M.Antonia | Elsevier | 2007Chemical compounds containing platinum have been employed since 1978 as drugs to beat certain type of tumours. Nevertheless, besides of their exceptional antitumoral properties, these drugs also have important deleterious side effects, such as, [...]![]()
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Peltomaa, Riikka ; Vaghini, Silvia ; Patiño Álvarez, Belén ; Benito-Peña, Elena ; Moreno-Bondi, María C. | Elsevier | 2016-09Plant-pathogenic Fusarium species, Fusarium verticillioides and Fusarium proliferatum, are the major producers of fumonisins which are one of the most common mycotoxins found in maize. Herein, we report the development of specific and sensitive [...]![]()
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Vicente Sánchez, Javier ; Alonso Conde, Rafael Alejandro ; Navascués, Eva ; Marquina Díaz, Domingo ; Santos de la Sen, Antonio | Elsevier | 2020-03-11Grapevine trunk diseases, caused by different fungal pathogens, are the most relevant group of diseases that affect vineyards, causing important economic losses. Quality control for sanitary purposes should be applied for different diseases in e[...]![]()
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Muñoz Martín, Alfonso ; De Vicente Muñoz, Gerardo ; Fernández Lozano, Javier ; Cloetingh, Sierd ; Willingshofer, Ernst ; Sokoutis, Dimitrios ; Beekman, Fred | Elsevier | 2010-09-22Large-scale folding is a key mechanism of lithospheric deformation and has been described in many parts of the Earth, both for the continental and oceanic lithospheres. Some aspects of this process such as the presence of coupling/decoupling bet[...]![]()
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Mayorga Pinilla, Santiago ; Vázquez Moliní, Daniel ; Álvarez Fernández-Balbuena, Antonio ; Muro, Carmen ; Muñóz, Javier | Elsevier | 2016-06A spectral aging test was developed to estimate the photochemical damage of oil, acrylic and gouache paints exposed to permanent lighting. The paints were irradiated at seven different wavelengths in the optical range to control and evaluate the[...]![]()
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The primitive variable formulation of the unsteady incompressible Navier-Stokes equations in three space dimensions is discretized with a combined Fourier-Legendre spectral method. A semi-implicit pressure correction scheme is applied to decoupl[...]![]()
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We study theoretically the level shift of the Dirac oscillator perturbed by any sharply peaked potential approaching a surface delta potential. A Green function method is used to obtain closed expressions for all partial waves and parities.![]()
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Kariyawasam, R. ; Gascon, B. ; Mah, J. ; Lau, R. ; Valencia, B. ; Llanos-Cuentas, A. ; Boggild, A.K. | Elsevier | 2018-10-10T23:27:56ZBackground : Cutaneous leishmaniasis (CL) may present with an inflammatory phenotype, characterized by pain, erythema, and purulent exudate, which is typically treated with antibiotics prior to anti-Leishmania treatment. Although the inflammator[...]![]()
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Sánchez Carnerero, Esther M. Márquez ; Sandoval Torrientes, Rafael ; Urieta Mora, Javier ; Moreno Jiménez, Florencio ; Maroto, Beatriz Lora ; Moya Cerero, Santiago de la | Elsevier | 2017-04A new catalytic heterogeneous system, very efficient and highly reusable, for the preparation of enantioenriched secondary alcohols through the addition of diethylzinc to benzaldehyde has been developed. This system is based on a chiral bis(hydr[...]![]()
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Martín Chivelet, Javier ; Muñoz García, María Belén ; Cruz, Juncal A. ; Ortega Martínez, Ana Isabel ; Turrero Jiménez, María Jesús | Elsevier | 2017-05Carbonate stalagmites have become increasingly attractive to Quaternary paleoclimate research, as they can be accurately dated by radiometric methods and concurrently yield high-resolution multi-proxy records of past climate conditions. Reliable[...]![]()
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Using gauge theory for Spin(7) manifolds of dimension 8, we develop a procedure, called Spin-rotation, which transforms a (stable) holomorphic structure on a vector bundle over a complex torus of dimension 4 into a new holomorphic structure over[...]![]()
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Hernando Grande, Antonio ; Gálvez Alonso, Fernando ; García, Miguel A. ; Guinea, Francisco | Elsevier | 2020-02-15We analyze the contribution of the inhomogeneous magnetic field induced by an electrical current to the spin Hall effect in metals. The Zeeman coupling between the field and the electron spin leads to a spin dependent force, and to spin accumula[...]![]()
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Carreño Sánchez, Fernando ; Arrieta Yáñez, Francisco ; Antón Revilla, Miguel Ángel | Elsevier | 2015-05-15The spin initialization of a hybrid system consisting of a p-doped semiconductor quantum dot coupled to a gold bowtie nanoantenna is analyzed. The quantum dot is described as a four-level atom-like system using the density matrix formalism. The [...]![]()
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The sigma model describing closed strings rotating in AdS_(3) × S^(3) is known to reduce to the onedimensional Neumann–Rosochatius integrable system. In this article we show that closed spinning strings in AdS_(3) × S^(3) × T^(4) in the presence[...]![]()
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The sigma model describing closed strings rotating in AdS_(3) × S^(3) is known to reduce to the one-dimensional Neumann–Rosochatius integrable system. In this article we show that closed spinning strings in AdS_(3) × S^(3) × T ^(4) in the presen[...]![]()
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García Fernández, Guillermo ; Guerrero Rojas, Jesús ; Llanes Estrada, Felipe José | Elsevier | 2017-02The gauge symmetry of the Standard Model is SU(3)_(c) x SU(2)_(L) x U(1)_(Y) for unknown reasons. One aspect that can be addressed is the low dimensionality of all its subgroups. Why not much larger groups like SU(7), or for that matter, SP(38) [...]![]()
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García Fernández, Guillermo ; Guerrero Rojas, Jesús ; Llanes Estrada, Felipe José | Elsevier | 2019-12We point out an error in our previous work, that affects the claims made for the special Lie groups and for the SO(N-c) groups of lowest dimension, which are therefore retracted. Our earlier results stand for larger-dimension SO(N-c), as well as[...]![]()
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This paper describes the application of the SRC rockmass classification system to tunnels under high horizontal tectonic stress excavated in weak rocks. The analysis was performed on 25 tunnels in Spain and Italy, for which it was found that muc[...]![]()
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In this paper we consider a nonlinear system of differential equations consisting of one parabolic equation and one ordinary differential equation. The system arises in chemotaxis, a process whereby living organisms respond to chemical substance[...]![]()
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Zapico, Ignacio ; Molina, Antonio ; Laronne, Jonathan B. ; Sánchez Castillo, Lázaro ; Martín Duque, José Francisco | Elsevier | 2019-01Two abandoned kaolin mines, surrounding one of the most outstanding natural parks of Spain, the Alto Tajo, have caused frequent environmental impacts. Within these are unstable areas prone to extensive mass movements that influence off-site sedi[...]![]()
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González Méijome, José Manuel ; Carracedo Rodríguez, Juan Gonzalo ; Lopes Ferreira, Daniela P. ; Faria Ribeiro, Migue A. ; Peixoto de Matos, Sofía C. ; Queiros, Antonio | Elsevier | 2016-02Purpose: To describe the stabilization of early adult-onset myopia in three university students after initiating orthokeratology treatment with corneal refractive therapy contact lenses. Methods: Three Caucasian early adult-onset progressing myo[...]![]()
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The representation of the periodic Hubbard model in the Clifford algebra leads to explicit expressions for several families of non-trivial half-filled states in any number of dimensions. A generalization of these expressions explains the structu[...]![]()
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We consider a retrial queueing system where customers at the retrial group have preemptive priority over customers at the waiting line. The stationary distribution can be approximated at a desired level of accuracy in such a way that the approxi[...]![]()
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LaGrone, Lacey N. ; Romani Pozo, Diego A. ; Figueroa, Juan F. ; Artunduaga, Maria A. ; Huaman Egoavil, Eduardo ; Rodriguez Castro, Manuel J. A. ; Foianini, Jorge Esteban ; Rubiano, Andres M. ; Rodas, Edgar B. ; Mock, Charles N. | Elsevier | 2019-01-25T16:03:21ZINTRODUCTION: Trauma quality improvement (QI) programs have been shown to improve outcomes and decrease cost. These are high priorities in low- and middle-income countries (LMICs), where 2,000,000 deaths due to survivable injuries occur each yea[...]![]()
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Transcriptomic profiling of venom producing tissues from different animals is an effective approach for discovering new toxins useful in biotechnological and pharmaceutical applications, as well in evolutionary comparative studies of venomous an[...]![]()
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Transcriptomic profiling of venom producing tissues from different animals is an effective approach for discovering new toxins useful in biotechnological and pharmaceutical applications, as well in evolutionary comparative studies of venomous an[...]![]()
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Palacios Ortega, Juan ; García Linares, Sara ; Rivera de la Torre, Esperanza ; Gavilanes, José G. ; Martínez del Pozo, Álvaro ; Slotte, J. Peter | Elsevier | 2019-06-18Actinoporins are a group of soluble toxic proteins that bind to membranes containing sphingomyelin (SM) and oligomerize to form pores. Sticholysin II (StnII) is a member of the actinoporin family, produced by Stichodactyla helianthus. Cholestero[...]![]()
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Modeling and understanding virus spreading is a crucial issue in computer security. Epidemiological models have been proposed to deal with this problem. We investigate the dynamics of computer virus spreading by considering an stochastic suscept[...]![]()
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A stochastic model for the spread of an SIS epidemic among a population consisting of N individuals, each having heterogeneous infectiousness and/or susceptibility, is considered and its behavior is analyzed under the practically relevant situat[...]![]()
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In this paper, we develop a stochastic model for topology optimization. We find robust structures that minimize the compliance for a given main load having a stochastic behavior. We propose a model that takes into account the expected value of t[...]![]()
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Francés Negro, Marta ; Carrancho Alonso, Ángel ; Pérez Romero, Amalia ; Arsuaga, Juan Luis ; Carretero, José Miguel ; Iriarte, Eneko | Elsevier | 2019-10In this paper we report the results of an archaeomagnetic and rock-magnetic study performed on a set of Neolithic and Chalcolithic potsherds from El Portalón de Cueva Mayor site (Sierra de Atapuerca, Burgos, Spain) to investigate their thermal h[...]![]()
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Wrent, Petra ; Rivas, Eva María ; Martínez Peinado, José ; Siloniz Jiménez, María Isabel de | Elsevier | 2010-08-15Unlike previously reported methods that need a combination of several typing techniques, we have 22 developed a single method for strain typing of the Zygosaccharomyces bailii, Z. mellis and Z. rouxii spoilage 23 species. Strains belonging to ot[...]