Publications

Displaying 1001 - 1025 of 1307

Publication	Date
Elhuyar-IXA: Semantic Relatedness and Cross-Lingual Passage Retrieval Authors: Olatz Ansa,Eneko Agirre,Xabier Saralegi,Hugo Zaragoza,Xabier Arregi,Maddalen Lopez de Lacalle,Arantxa Otegi This article describes the participation of the joint Elhuyar-IXA group in the ResPubliQA exercise at QA&CLEF. In particular, we participated in the English-English monolingual task and in the Basque-English crosslingual one. Our focus has been threefold: (1) to check to what extent information… Springer Berlin Heidelberg	2010-01-01
Strategies to Map Parallel Applications onto Meshes Authors: Jose A. Lozano,Jose Miguel-Alonso,Jose Antonio Pascual The optimal mapping of tasks of a parallel program onto nodes of a parallel computing system has a remarkable impact on application performance. We propose a new criterion to solve the mapping problem in 2D and 3D meshes that uses the communication matrix of the application and a cost matrix that… Springer Berlin Heidelberg	2010-01-01
Venus Spectrophotometry During the MESSENGER Mission Fly-By Authors: William E. McClintock,Ricardo Hueso,Javier Peralta,Gregory M. Holsclaw,Agustín Sánchez-Lavega,Santiago Pérez-Hoyos The NASA mission MESSENGER fly-byed planet Venus on June 2007 on its route to Mercury. This chance was took to produce coordinated observations between Messenger and ESA Venus Express spacecrafts. This work shows spectra in the wavelength range between 320 and 1450nm retrieved with the instrument… Springer Berlin Heidelberg	2010-01-01
A Review on Parallel Estimation of Distribution Algorithms Authors: Alexander Mendiburu,Jose Miguel-Alonso,Jose A. Lozano Estimation of Distribution Algorithms (EDAs) are a set of techniques that belong to the field of Evolutionary Computation. They are similar to Genetic Algorithms (GAs), in the sense that, given a problem, they use a population of individuals to represent solutions, and this population is made to… Springer Berlin Heidelberg	2010-01-01
Harmony Search Heuristics for Quasi-asynchronous CDMA Detection with M-PAM Signalling Authors: Laura Garcia-Padrones,Sergio Gil-Lopez,J. Del Ser Focusing on CDMA (Code Division Multiple Access) uplink communications, this paper addresses the application of heuristic techniques to the multiple user detection problem when dealing with asynchrony between transmitters and bandwidth-limited PAM (Pulse Amplitude Modulation) signals. In such… Springer Berlin Heidelberg	2010-01-01
On the Application of a Novel Grouping Harmony Search Algorithm to the Switch Location Problem Authors: Javier Del Ser,Laura Garcia-Padrones,Sergio Gil-Lopez,Jose A. Portilla-Figueras,Sancho Salcedo-Sanz,Itziar Landa This paper presents the adaptation of a novel heuristic algorithm to the Switch Location Problem (SLP), a NP-hard problem where a set of distributed terminals, with distinct rate demands, is to be assigned to a fixed number of concentrators subject to capacity constraints. Each terminal must be… Springer Berlin Heidelberg	2010-01-01
Fish recruitment prediction, using robust supervised classification methods Authors: Fernandes, J.A. (Jose A.),Irigoien, X. (Xabier),Goikoetxea, N.,Lozano, J.A.,Inzab, I.,Pérez, A.,Bode, A. (Antonio) 2 Elsevier BV	2010-01-01
Arithmetic Method of Double-Injection-Electrode Model for Resistivity Measurement Through Metal Casing Authors: Chen, Q.,Pardo, D.,Li, H.-B.,Wang, F.-R.,Ye, Q.-Z. Through-casing resistivity (TCR) measurement instruments such as Cased Hole Formation Resistivity are extensively used for the dynamic monitoring of oil reservoirs during the production phase in oil wells to evaluate the residual oil distribution. However, two shortcomings still exist in the common… Institute of Electrical and Electronics Engineers (IEEE)	2010-01-01
Using Semantic Relatedness and Word Sense Disambiguation for (CL)IR Authors: Eneko Agirre,Arantxa Otegi,Hugo Zaragoza In this paper we report the experiments for the CLEF 2009 Robust-WSD task, both for the monolingual (English) and the bilingual (Spanish to English) subtasks. Our main experimentation strategy consisted of expanding and translating the documents, based on the related concepts of the documents. For… Springer Berlin Heidelberg	2010-01-01
The jovian anticyclone BAI. Motions and interaction with the GRS from observations and non-linear simulations Authors: Agustín Sánchez-Lavega,Ricardo Hueso,Enrique Garcia-Melendo,Santiago Pérez-Hoyos,J. González,Jon Legarreta,J. M. Gómez-Forrellad Abstract A study of the dynamics of the second largest anticyclone in Jupiter, Oval BA, and its red colour change that occurred in late 2005 is presented in a three part study. The first part, this paper, deals with its long-term kinematical and dynamical behaviour monitored since its formation… Elsevier BV	2009-10-01
A novel heuristic algorithm for multiuser detection in synchronous CDMA wireless sensor networks Authors: Ignacio Olabarrieta,Javier Del Ser,Sergio Gil-Lopez This paper introduces a novel heuristic algorithm for N-user detection in synchronous CDMA multiple access networks. In such systems, the performance of the conventional single-user detection technique (i.e. a rake receiver compounded by a set of matched filters) is clearly bounded by the well-… IEEE	2009-10-01
The jovian anticyclone BAIII. Aerosol properties and color change Authors: Agustín Sánchez-Lavega,Ricardo Hueso,Santiago Pérez-Hoyos,Enrique Garcia-Melendo,Jon Legarreta Abstract A study of the vertical cloud structure of oval BA and its red color change is presented in this third part of our complete analysis. A large interest in Jupiter’s anticyclone BA was created by its reddening that occurred between 2005 and 2006. In this work we quantify the color change… Elsevier BV	2009-10-01
H.264/SVC rate-resiliency tradeoff in faulty communications through 802.16e railway networks Authors: Iraide Unanue,Javier Del Ser,Jon Casasempere,Pedro Sanchez Focusing on 802.16e-based railway networks, our work deals with the degradation of the perceived quality of multimedia communications in presence of handover events. The movement of mobile nodes (MN) across coverage areas of distinct Base Stations (BS) involves global disconnection periods, which… IEEE	2009-10-01
Serially-concatenated LDGM codes for correlated sources over gaussian broadcast channels Authors: Mikel Hernaez,J. Del Ser,Pedro M. Crespo,Javier Garcia-Frias We propose a superposition scheme, based on the use of serially-concatenated LDGM codes, for the transmission of spatially correlated sources over Gaussian broadcast channels. The messages intended for each receiver are independently encoded using the same code. In this manner, a strong degree of… Institute of Electrical and Electronics Engineers (IEEE)	2009-10-01
Erratum to “A comparison of generalized hybrid Monte Carlo methods with and without momentum flip” [J. Comput. Phys. 228 (2009) 2256–2265] Authors: Akhmatskaya, Elena,Bou-Rabee, Nawaf,Reich, Sebastian The generalized hybrid Monte Carlo (GHMC) method combines Metropolis corrected constant energy simulations with a partial random refreshment step in the particle momenta. The standard detailed balance condition requires that momenta are negated upon rejection of a molecular dynamics proposal step.… Elsevier BV	2009-10-01
Iterative concatenated Zigzag decoding and blind data fusion of correlated sensors Authors: Javier Del Ser,Javier Garcia-Frias,Pedro M. Crespo This paper addresses the sensor network scenario where several nodes sense a common information source S. When such sensors forward their correlated observations to a common shared receiver, it is necessary to combine the received information in order to obtain an estimation of S with high… IEEE	2009-10-01
The jovian anticyclone BAII. Circulation and interaction with the zonal jets Authors: Santiago Pérez-Hoyos,Agustín Sánchez-Lavega,Jon Legarreta,E. Garcı´a-Melendo,Ricardo Hueso Abstract In this second part of our study of the large jovian anticyclone BA we present detailed measurements of its internal circulation and numerical models of its interaction with the zonal jets and nearby cyclonic regions. We characterized the flow using high-resolution observations obtained… Elsevier BV	2009-10-01
Evolution of the cloud field and wind structure of Jupiter's highest speed jet during a huge disturbance Authors: Agustín Sánchez-Lavega,Enrique Garcia-Melendo,N. Barrado-Izagirre,Santiago Pérez-Hoyos Aims. Despite the banded visual aspect of cloud patterns in Jupiter, high resolution images indicate that these regions are markedly turbulent. One region of particular interest is the north temperate belt (NTB) at 21 ◦ N planetocentric latitude, where the most intense Jovian jet resides with… EDP Sciences	2009-09-03
Mining probabilistic models learned by EDAs in the optimization of multi-objective problems Authors: Jose A. Lozano,Pedro Larrañaga,Roberto Santana,Concha Bielza One of the uses of the probabilistic models learned by estimation of distribution algorithms is to reveal previous unknown information about the problem structure. In this paper we investigate the mapping between the problem structure and the dependencies captured in the probabilistic models… ACM	2009-07-08
Gravity waves in Jupiter's equatorial clouds observed by the Galileo orbiter Authors: Arregi, J.,Rojas, J.F.,Hueso, R.,Sánchez-Lavega, A. International audience Elsevier BV	2009-07-01
Brightness power spectral distribution and waves in Jupiter's upper cloud and hazes Authors: Barrado-Izagirre, N.,Pérez-Hoyos, S.,Sánchez-Lavega, A. In this work we analyze the spatial structure of Jupiter's cloud reflectivity field in order to determine brightness periodicities and power spectra characteristics together with their relationship with Jupiter's dynamics and turbulence. The research is based on images obtained in the near-infrared… Elsevier BV	2009-07-01
Assessment of HRQoL in patients with eating disorders by the beta‐binomial regression approach Authors: Angel Padierna,Inmaculada Arostegui,José M. Quintana AbstractObjective:To study the influence of clinical variables on health‐related quality of life (HRQoL) among women with eating disorder (ED) using beta‐binomial regression (BBR) to analyze scores on the Short‐Form 36 (SF‐36) as dependent variable.Method:Female patients diagnosed with ED completed… Wiley	2009-06-17
Wiener filter-based fixed-complexity vector precoding for the MIMO downlink channel Authors: John S. Thompson,Maitane Barrenechea,J. Del Ser,Mikel Mendicute A fixed-throughput Wiener filter vector precoding (VP) approach specially suitable for hardware implementation in field programable gate array (FPGA) devices is introduced in this paper. The lattice decoding algorithm, which is based on the sphere decoder (SD) lattice search, performs in its first… IEEE	2009-06-01
Vertical shears in Saturn's eastward jets at cloud level Authors: García-Melendo, Enrique,Sánchez-Lavega, Agustín,Rojas, J.F.,Pérez-Hoyos, S.,Hueso, R. International audience Elsevier BV	2009-06-01
Design, simulation and hardware validation of a low-cost CLMS echo canceling system Authors: Javier Del Ser,Mikel Sanchez,Pablo Prieto,Mikel Mendicute This paper presents the design, simulation and performance of a low-cost echo canceler for its application to on-channel repeaters in single frequency DVB-T networks. In these devices an echo canceler is required in order to avoid the coupling echoes produced between transmission and reception… IEEE	2009-06-01