Publications

Displaying 1201 - 1225 of 1307

Publication	Date
Study of high impedance fault detection in Levante area in Spain Authors: A. Lazkano,Luis A. Leturiondo,Elisabete Aramendi,J.A. Gonzalez,Jesus Ruiz This paper presents a study of high impedance fault detection in a particular case of the Spanish power distribution network. It aims to carry out an analysis of high impedance fault riskiness in three-wire distribution systems. A study of the presumed fault is performed considering 64N protection… IEEE	2002-11-08
A new approach to high impedance fault detection using wavelet packet analysis Authors: Elisabete Aramendi,A. Lazkano,Luis A. Leturiondo,Jesus Ruiz The paper presents a new approach to high impedance fault detection based on wavelet packet analysis. The nature and dynamics of the arc phenomenon related to high impedance faults are analyzed. A background is reported about wavelet transform and wavelet packet decomposition. Then, detecting… IEEE	2002-11-07
Changes in health related quality of life among patients treated for eating disorders. Authors: Angel Padierna,M.J. Horcajo,José M. Quintana,Inmaculada Arostegui,Nerea González To prospectively investigate changes in the perception of health-related quality of life (HRQoL) among eating disorder patients after 2 years of treatment and follow-up and clinical predictors of change.One hundred and thirty-one consecutive subjects were recruited from an eating disorder… Kluwer Academic Publishers	2002-09-01
Density-functional study of the stabilization of the Si(001) dimer vacancy by Ni Authors: R. H. Nobes,Elena Akhmatskaya,Jan Andzelm,Andrew P. Horsfield,Niranjan Govind,George Fitzgerald For many condensed matter problems, atomic type orbitals offer good computational efficiency. We have studied the clean surface of silicon using the program ${\mathrm{DMOL}}^{3}$ and obtain results in excellent agreement with well converged plane-wave calculations. We then proceed to study the… American Physical Society (APS)	2002-08-14
Observations of Saturn's Ribbon Wave 14 Years after Its Discovery Authors: Agustín Sánchez-Lavega Abstract A singular feature in planetary atmospheres, the saturnian midnorthern latitude “ribbon” wave, was discovered in images obtained during the Voyager 1 and 2 encounters with the planet in 1980 and 1981. Here we present evidence of its first detection 14 years later (about half a Saturn… Elsevier BV	2002-07-01
A Comparative Study of Jovian Anticyclone Properties from a Six-Year (1994–2000) Survey Authors: Morales-Juberías, Raúl,Sánchez-Lavega, Agustín,Lecacheux, Jean,Colas, François International audience Elsevier BV	2002-05-01
Acoustic Waves in Planetary Atmospheres Authors: Agustín Sánchez-Lavega We present a study of the speed, Mach number, and intensity of sound waves in the atmospheres of the planets. These represent real examples of applied simple concepts of acoustics. American Association of Physics Teachers (AAPT)	2002-04-01
Use of explicit criteria for total hip joint replacement fixation techniques Authors: Ramón Tobio,Jose M Aranburu,J. Ignacio Goenaga,Inmaculada Arostegui,José M. Quintana,Jesús Azkarate,Begoña Goikoetxea We developed a tool to judge the appropriateness of indications and fixation mechanisms for total hip joint replacement (THJR) and applied it to a sample of patients. Criteria were developed using a modified Delphi panel judgment process, following the RAND methodology (RAM). We recruited, during 1… Elsevier BV	2002-04-01
On the effective thermal diffusivity of fiber-reinforced composites Authors: Agustín Sánchez-Lavega,J. M. Terrón,R. Celorrio,Agustín Salazar Modulated photothermal techniques provide useful methods based on linear relations between measurable quantities to obtain the thermal diffusivity of homogeneous materials. In this letter the applicability of such linear relations in the case of unidirectional fiber-reinforced composites (UFRC) is… AIP Publishing	2002-03-18
General solution for the thermal wave scattering in fiber composites Authors: Agustín Salazar,Agustín Sánchez-Lavega,J. M. Terrón In this article we present a general solution for the ac temperature field generated from a modulated heating in an opaque material containing a series of aligned subsurface cylinders. The model includes the multiple scattering effects suffered by the plane thermal wave, generated by a planar heat… AIP Publishing	2002-02-01
Estimation of Distribution Algorithms Authors: Pedro Larrañaga,Jose A. Lozano Springer US	2002-01-01
On the support of solutions to the generalized KdV equation Authors: Luis Vega,Gustavo Ponce,Carlos E. Kenig It is shown that if u is a solution of the initial value problem for the generalized Korteweg–de Vries equation such that there exists b \in ℝ with \… European Mathematical Society - EMS - Publishing House GmbH	2002-01-01
Photoelastic effect and mirage deflection in anisotropic materials Authors: Agustín Sánchez-Lavega,Gerardo Gutiérrez-Juárez,Whye-Teong Ang,Agustín Salazar,M. Gateshki The collinear mirage technique is widely used to measure the thermal diffusivity of semi-transparent materials. However, in a recent paper [A. Salazar, M. Gateshki and A. Sanchez-Lavega: Appl. Phys. Lett. 76, 2665 (2000)], it was shown that for isotropic materials, because of the influence of… Springer Science and Business Media LLC	2002-01-01
Global wellposedness for 1D non-linear Schrödinger equation for data with an infinite L2 norm Authors: Ana Vargas,Luis Vega AbstractWe prove global wellposedness for the one-dimensional cubic non-linear Schrödinger equation in a space of distributions which is invariant under Galilean transformations and includes L2. This space arises naturally in the study of the restriction properties of the Fourier transform to… Elsevier BV	2001-12-01
A similarity approach to the atmospheric dynamics of giant extrasolar planets and brown dwarfs Authors: Agustín Sánchez-Lavega We present an assessment of the most plausible dynamical regimes operating in the atmospheres of giant extrasolar planets (EGP) and cold ("methane" ) brown dwarfs from the available data on a selected group of objects. The most important parameters controlling the atmospheric circulation are the… EDP Sciences	2001-10-01
A Study of the Stability of Jovian Zonal Winds from HST Images: 1995–2000 Authors: Agustín Sánchez-Lavega,Enrique Garcia-Melendo Abstract We present a five-year study of the temporal stability of Jupiter's zonal wind velocity profile at cloud level based on Hubble Space Telescope images obtained from 1995 to 2000. We used the correlation of east–west albedo scans in pairs of images separated by one jovian rotation to… Elsevier BV	2001-08-01
A Three-Dimensional Model of Moist Convection for the Giant Planets: The Jupiter Case Authors: Ricardo Hueso,Agustín Sánchez-Lavega Abstract We present a three-dimensional cloud model designed for the study of formation and evolution of moist convective storms on the giant planets. This is a finite-difference model that solves the dynamic and thermodynamic equations forward in time under the anelastic approximation including… Elsevier BV	2001-06-01
Multiple scattering of thermal waves by a coated subsurface cylindrical inclusion Authors: Agustín Sánchez-Lavega,J. M. Terrón,Agustín Salazar In this article we present a theoretical and experimental study of the multiple scattering of a plane thermal wave between a two-layer subsurface cylinder and the material surface. The thermal wave is generated at the surface of an opaque material by a modulated extended laser beam. First we study… AIP Publishing	2001-05-15
*Systematic ab initio* study of the compressibility of silicate garnets** Authors: Chris J. Pickard,Elena Akhmatskaya,V. Milman,R. H. Nobes,Björn Winkler,J. A. White The structural properties of the silicate garnets andradite, Ca3Fe2Si3O12, uvarovite, Ca3Cr2Si3O12, knorringite, Mg3Cr2Si3O12, goldmanite, Ca3V2Si3O12, blythite, Mn^{2+}_3Mn^{3+}_2Si3O12, skiagite, Fe^{2+}_3Fe^{3+}_2Si3O12, calderite, Mn^{2+}_3Fe^{3+}_2Si3O12, and khoharite, Mg3Fe^{3+}_2Si3O12,… International Union of Crystallography (IUCr)	2001-04-01
A NOTE ON THE NONLINEAR SCHRÖDINGER EQUATION IN WEAK L^pSPACES Authors: Cazenave, Thierry,Vega, Luis,Vilela, Mari Cruz We study the global Cauchy problem for the equation iut+Δu+λ\|u\|αu=0 in ℝN. Using generalized Strichartz' inequalities we show that, under some restrictions on α, if the initial value is sufficiently small in some weak Lpspace then there exists a global solution. This result provides a common… World Scientific Pub Co Pte Lt	2001-02-01
The Merger of Two Giant Anticyclones in the Atmosphere of Jupiter Authors: Sánchez-Lavega, Agustín,Orton, Glenn S.,Morales, Rafael,Lecacheux, Jean,Colas, François,Fisher, B.,Fukumura-Sawada, P.,Golisch, W.,Griep, D.,Kaminski, C.,Baines, Kevin H.,Rages, K. A.,West, R. Two giant ovals in Jupiter's southern atmosphere, vortices of counterclockwise-rotating winds, merged in a 3-week period, starting in March 2000. One of the ovals called FA was more than 60 years old; the other called BE was the product of two 60-year-old ovals (BC and DE) that merged in 1998 (A.… Elsevier BV	2001-02-01
Evaluación de la calidad de vida en pacientes con cáncer de pulmón Authors: A. Capelastegui,José M. Quintana,A. Padierna,Y. Etxeberria,Julio Pérez-Izquierdo,Inmaculada Arostegui,C. Badiola ResumenObjetivo: El objetivo de este estudio ha sido describir la calidad de vida de los pacientes afectados de cáncer de pulmón, midiendo parámetros físicos, psíquicos, sociales, y síntomas generales y específicos de la enfermedad, por medio de cuestionarios, e investigar si existen diferencias en… Elsevier BV	2001-01-01
Knowledge Sources for Word Sense Disambiguation Authors: David Martinez,Eneko Agirre Two kinds of systems have been defined during the long history of WSD: principled systems that define which knowledge types are useful for WSD, and robust systems that use the information sources at hand, such as, dictionaries, light-weight ontologies or hand-tagged corpora. This paper tries to… Springer Berlin Heidelberg	2001-01-01
Evaluation of a new proposal for an arcing fault detection method based on wavelet packet analysis Authors: Luis A. Leturiondo,Elisabete Aramendi,A. Lazkano,Jesus Ruiz AbstractThis paper presents a new proposal for detection of arcing faults and evaluates the detection rate and the security level of the proposed method. This method is based on analysis of three‐phase unbalanced current, easily accessible feeder 3I0, using decomposition of the signal by means of… Wiley	2001-01-01
Calidad de vida de los pacientes afectados de trastornos de la alimentación Authors: M.J. Horcajo,A. Padierna,Inmaculada Arostegui,Nerea González,José M. Quintana ResumenObjetivoAnalizar la calidad de vida percibida de pacientes ambulatorios con trastornos de la alimentación en relación a la gravedad de su sintomatología y en comparación a otros trastornos psiquiátricos y con la población general.MétodosEstudio descriptivo transversal de la calidad de vida… Elsevier BV	2001-01-01