Publications

Displaying 1226 - 1250 of 1307

Publication	Date
Evaluation of a new proposal for arcing fault detection method based on wavelet packet analysis Authors: Jesus Ruiz,Luis A. Leturiondo,Elisabete Aramendi,A. Lazkano 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… IEEE	2001-01-01
Evaluation of explicit criteria for total hip joint replacement Authors: José M. Quintana,Inmaculada Arostegui,Xabier Elexpe,Jesús Azkarate,Andoni Arcelay,Jon Letona,J. Ignacio Goenaga We tested an appropriateness of indications tool for total hip joint replacement in patients with osteoarthritis. Criteria were developed using a modified Delphi panel judgment process. Ratings were analyzed regarding level of agreement among panelists. Another panel rated the same indications;… Elsevier BV	2000-12-01
Saturn's Zonal Winds at Cloud Level Authors: Agustín Sánchez-Lavega,Pedro V. Sada,Jose Félix Rojas We present an analysis of new cloud motion measurements in Saturn's atmosphere from Voyager 1 and 2 images and define a nominal zonal wind velocity vs latitude profile for the cloud top level that can be used as reference for the upcoming Cassini mission. Improvements over previous studies include… Elsevier BV	2000-10-01
Surface reconstructions on the (100) CoSi2 surface Authors: Kenny, S,Goldfarb, I,Akhmatskaya, E,Briggs, G We have investigated the relative stability of a number of p(1◊1), c(2◊2) and p(2◊2) surface reconstructions on the (100) CoSi 2 surface as deposited on Si(100). The relative stability of these reconstructions as a function of whether the growth conditions are either Si rich or Co rich is also… Elsevier BV	2000-10-01
Long-Lived Vortices and Profile Changes in the 23.7°N High-Speed Jovian Jet Authors: J. M. Gomez,D. Parker,Enrique Garcia-Melendo,I. Miyazaki,François Colas,Jean Lecacheux,Agustín Sánchez-Lavega Abstract This paper addresses the question of up to what extent there are changes in the jovian jets as seen at cloud level and how they relate to the cloud morphology changes. We focus on the particularly interesting region at 24°N where the most intense jovian jet as observed at visual… Elsevier BV	2000-08-01
Computational chemistry on Fujitsu vector–parallel processors: Development and performance of applications software Authors: Rendell, Alistair,Bliznyuk, Andrei,Nobes, Ross H,Akhmatskaya, Elena V,Fruchtl, Herbert A,Kung, Paul W-C,Milman, Victor,Lung, Han,Huber, Thomas In this and a preceding paper, we provide an introduction to the Fujitsu VPP range of vector-parallel supercomputers and to some of the computational chemistry software available for the VPP. Here, we consider the implementation and performance of seven popular chemistry application packages. The… Elsevier BV	2000-07-01
On the Initial Value Problem for the Ishimori System Authors: Gustavo Ponce,Luis Vega,Carlos E. Kenig Springer Science and Business Media LLC	2000-06-01
On the strong influence of the photoelastic effect in the collinear mirage deflection Authors: Agustín Sánchez-Lavega,Agustín Salazar,M. Gateshki We report in this letter on the strong influence of the polarization state of the probe beam in the amplitude and phase of the collinear mirage deflection. A model of the collinear mirage deflection that takes into account the photoelastic effect in the sample has been developed. The agreement… AIP Publishing	2000-05-08
The 90-day oscillations of Jupiter’s Great Red Spot revisited Authors: J. M. Gomez,I. Miyazaki,François Colas,Josep M. Trigo-Rodríguez,Agustín Sánchez-Lavega,Jean Lecacheux Abstract We have analyzed a large set of ground-based CCD images covering the period from 1993 to early 1999, to address the current status and behavior of the 90-day longitudinal oscillations of the Jovian Great Red Spot (GRS). The good temporal sampling of these data have been complemented with… Elsevier BV	2000-04-01
Multiple scattering effects of thermal waves by two subsurface cylinders Authors: Agustín Sánchez-Lavega,J. M. Terrón,Agustín Salazar We present a theoretical model and experimental measurements of the temperature field produced by the multiple scattering of thermal waves between two close subsurface cylinders and the material surface. The thermal waves are excited at the surface of an opaque material by an extended modulated… AIP Publishing	2000-03-01
The health-related quality of life in eating disorders. Authors: Angel Padierna,José M. Quintana,Inmaculada Arostegui,Nerea González,Mª J. Horcajo This study investigated the perception of health-related quality of life (HRQoL) in ambulatory patients with eating disorders in relation to the severity of eating symptomatology and psychological comorbidity.One hundred ninety-seven study patients were consecutively recruited at the Eating… Kluwer Academic Publishers	2000-01-01
Global well-posedness for semi-linear wave equations Authors: Gustavo Ponce,Carlos E. Kenig,Luis Vega (2000). Global well-posedness for semi-linear wave equations. Communications in Partial Differential Equations: Vol. 25, No. 9-10, pp. 1741-1752. Informa UK Limited	2000-01-01
EVALUATION OF THE APPROPRIATENESS OF HIP JOINT REPLACEMENT TECHNIQUES Authors: José Villar,Ignacio Beldarrain,Jesús Azkarate,Inmaculada Arostegui,José M. Quintana,J. Ignacio Goenaga Objective: To evaluate the appropriateness of the use of hip joint replacements (HJRs) using explicit criteria developed by an expert panel.Methods: Observational study. Nine hundred ninety-seven patients from five hospitals with a diagnosis of osteoarthritis, avascular necrosis, hip fracture,… Cambridge University Press (CUP)	2000-01-01
Interaction of Jovian White Ovals BC and DE in 1998 from Earth-Based Observations in the Visual Range Authors: D. Parker,I. Miyazaki,Agustín Sánchez-Lavega,J. R. Acarreta,Ricardo Hueso,Jose Félix Rojas,François Colas,Jean Lecacheux Abstract During the 1998 Jupiter–Sun conjunction, the 60-year-old white ovals BC and DE at 33° south latitude merged into a larger oval “BE” at the same latitude (J. Lecacheux, P. Drossart, F. Colas, G. S. Orton, B. Fisher, A. Sanchez-Lavega, R. Hueso, J. F. Rojas, and I. Miyazaki, IAU Circular… Elsevier BV	1999-11-01
Morrey–Campanato Estimates for Helmholtz Equations Authors: Benoît Perthame,Luis Vega AbstractWe derive uniform weightedL2and Morrey–Campanato type estimates for Helmholtz equations in a medium with a variable index which is not necessarily constant at infinity. Our technique is based on a multiplier method with appropriate weights which generalize those of Morawetz for the wave… Elsevier BV	1999-06-01
Restriction theorems and maximal operators related to oscillatory integrals in ℝ3 Authors: Moyua, A.,Vargas, A.,Vega, L. Duke University Press	1999-02-15
Vertical Cloud Structure in Saturn's 1990 Equatorial Storm Authors: Agustín Sánchez-Lavega,J. R. Acarreta Abstract We present a model study of the evolution of the vertical cloud structure and aerosol optical characteristics of the giant storm that erupted in Saturn's atmosphere in September 1990. This analysis is based on the photometric measurements of the reflected intensity of the equatorial… Elsevier BV	1999-01-01
Motions in Jovian Hot Spot–Plume Regions Using Voyager Images Authors: Ricardo Hueso,Agustín Sánchez-Lavega Abstract We have measured the motions and wind velocity vectors in six jovian hot spot–plume areas (latitudes 0° to +12°) using high resolution Voyager 1 and 2 images separated by one jovian rotation (∼10 hr). Rapid changes in cloud forms take place in a few hours at scales from 100 to 2000 km.… Elsevier BV	1998-12-01
Smoothing effects and local existence theory for the generalized nonlinear Schrödinger equations Authors: Luis Vega,Gustavo Ponce,Carlos E. Kenig Springer Science and Business Media LLC	1998-11-20
A system of circumpolar waves in Jupiter's stratosphere Authors: J. R. Acarreta,Agustín Sánchez-Lavega,R. Hueso We report on the optical identification on Hubble Space Telescope (HST) and Voyager 1 archived images, of a circumpolar system of Jovian stratospheric quasi‐stationary waves, centered at planetographic latitudes −53°, −62°, and −67° with averaged zonal wavenumbers 23, 11, and 12 respectively. The… American Geophysical Union (AGU)	1998-11-01
Dynamics and Interaction between a Large-Scale Vortex and the Great Red Spot in Jupiter Authors: D. Parker,Ricardo Hueso,Jean Lecacheux,Agustín Sánchez-Lavega,François Colas,J. M. Gomez,Jose Félix Rojas,I. Miyazaki Abstract A unique large-scale vortex, the White Tropical Oval (WTrO), was first observed in the South Tropical Zone of Jupiter, at the latitude of the Great Red Spot (GRS) in 1983. Its origin is probably related to a period of intense formation of eddies in the Southern edge of the South… Elsevier BV	1998-11-01
A study of the photothermal signal produced by a series of subsurface cylinders in opaque materials Authors: Agustín Sánchez-Lavega,J. M. Terrón,Agustín Salazar,A. Ocariz We present a theoretical and experimental study of the photothermal signal produced by a series of buried cylinders in an optically opaque sample. The models are valid for any value of the thermal properties of the cylinder and sample (the extreme cases treated are isolating and conducting… AIP Publishing	1998-11-01
Effective thermal diffusivity of layered materials measured by modulated photothermal techniques Authors: Agustín Salazar,Agustín Sánchez-Lavega,J. M. Terrón Modulated photothermal techniques provide useful methods based on linear relations to measure the thermal diffusivity of homogeneous materials. We have analyzed theoretically the applicability of such linear relations to two particular cases of layered composites, i.e., two-layer materials and… AIP Publishing	1998-09-15
Exploration of the Mechanism of the Oxidation of Sulfur Dioxide and Bisulfite by Hydrogen Peroxide in Water Clusters UsingAb InitioMethods Authors: Elena Akhmatskaya,Ian J. Palmer,Mark A. Vincent,Ian H. Hillier Mechanisms for the oxidation of sulfur dioxide and bisulfite by hydrogen peroxide in water droplets have been explored using ab initio electronic structure methods. The large barriers that are found for bimolecular reactions are considerably reduced upon the inclusion of explicit water molecules,… American Chemical Society (ACS)	1998-03-26
Long-Term Evolution of Comet SL-9 Impact Features: July 1994–September 1996 Authors: Jose Félix Rojas,Ricardo Hueso,Agustín Sánchez-Lavega,Jesús Arregui,J. R. Acarreta,Jean Lecacheux,François Colas,Josep Marı́a Gómez Abstract We present a two year study of the evolution of SL9 impact aerosol debris we observed between 0.4 and 0.9 micrometers with continuous high temporal coverage from July 1994 through September 1996 and at 1.7 and 2.3 micrometers during three observing runs in July 1994 and March and August… Elsevier BV	1998-02-01