Publications

Displaying 876 - 900 of 1351

Publication	Date
The Cost of Continuity: Performance of Iterative Solvers on Isogeometric Finite Elements Authors: Collier, Nathan,Dalcin, Lisandro,Pardo, David,Calo, Victor M. In this paper we study how the use of a more continuous set of basis functions affects the cost of solving systems of linear equations resulting from a discretized Galerkin weak form. Specifically, we compare performance of linear solvers when discretizing using $C^0$ B-splines, which span… Society for Industrial & Applied Mathematics (SIAM)	2013-01-01
Integrated Assessment of Natural Hazards and Climate Change Adaptation: I - The KULTURisk Methodological Framework Authors: Carlo Giupponi,Vahid Mojtahed,Animesh K. Gain,Stefano Balbi A conceptual framework integrating different disciplines has been developed to comprehensively evaluate the benefits of risk prevention. Three main innovations are proposed with regards to the state of the art: (1) to include the social capacities of reducing risk, (2) to go beyond the estimation… Elsevier BV	2013-01-01
The Economics of Hydro-Meteorological Disasters: Approaching the Estimation of the Total Costs Authors: Stefano Balbi,Carlo Giupponi,Roland Olschewski,Vahid Mojtahed 21 p. Elsevier BV	2013-01-01
Critical Issues in Model-Based Surrogate Functions in Estimation of Distribution Algorithms Authors: Jose A. Lozano,Alexander Mendiburu,Roberto Santana In many optimization domains the solution of the problem can be made more efficient by the construction of a surrogate fitness model. Estimation of distribution algorithms (EDAs) are a class of evolutionary algorithms particularly suitable for the conception of model-based surrogate techniques.… Springer International Publishing	2013-01-01
PATHSenrich: A Web Service Prototype for Automatic Cultural Heritage Item Enrichment Authors: Eneko Agirre,Kike Fernandez,Ander Barrena,Aitor Soroa,Arantxa Otegi,Esther Miranda Large amounts of cultural heritage material are nowadays available through online digital library portals. Most of these cultural items have short descriptions and lack rich contextual information. The PATHS project has developed experimental enrichment services. As a proof of concept, this paper… Springer Berlin Heidelberg	2013-01-01
A three-dimensional self-adaptive hp finite element method for the characterization of waveguide discontinuities Authors: Gómez Revuelto, Ignacio,García Castillo, Luis E.,Llorente Romano, Sergio,Pardo, David We propose the use of a highly-accurate three-dimensional (3D) fully automatic hp-adaptive finite element method (FEM) for the characterization of rectangular waveguide discontinuities. These discontinuities are either the unavoidable result of mechanical/electrical transitions or deliberately… Elsevier BV	2012-12-01
Robustness of different TMR granularities in shared wishbone architectures on SRAM FPGA Authors: Uli Kretzschmar,Armando Astarloa,Jesús Lázaro,M. Garay,J. Del Ser Triple Module Redundancy (TMR) is a popular technique for protecting critical FPGA designs. Although automatic tools for TMR generation mostly use triplication on flip-flop level, designers may opt for different approaches. This work analyses the impact of different granularities on TMR… IEEE	2012-12-01
What mechanism of niche segregation allows the coexistence of sympatric sibling rhinolophid bats? Authors: Salsamendi Pagola, Egoitz,Garín Atorrasagasti, Ignacio,Arostegui Madariaga, Inmaculada,Goiti Ugarte, Urtzi,Aiartza Azurtza, José Ramón AbstractIntroductionOur purpose was to assess how pairs of sibling horseshoe bats coexists when their morphology and echolocation are almost identical. We collected data on echolocation, wing morphology, diet, and habitat use of sympatricRhinolophus mehelyiandR.euryale. We compared our results with… Springer Science and Business Media LLC	2012-11-13
The origin and evolution of Saturn’s 2011–2012 stratospheric vortex Authors: Agustín Sánchez-Lavega,Pgj Irwin,James Sinclair,Jon Legarreta,G. S. Orton,Gordon L. Bjoraker,Amy A. Simon-Miller,Brigette E. Hesman,Peter L. Read,N. Gorius,F. M. Flasar,Jane Hurley,Leigh N. Fletcher,R. K. Achterberg,Enrique Garcia-Melendo The planet-encircling springtime storm in Saturn's troposphere (December 2010-July 2011, Fletcher, L.N. et al. [2011]. Science 332, 1413-1414; Sánchez-Lavega, A. et al. [2011]. Nature 475, 71-74; Fischer, G. et al. [2011]. Nature 475, 75-77) produced dramatic perturbations to stratospheric… Elsevier BV	2012-11-01
Amino acid signatures in the Ovar-DRB1 peptide-binding pockets are associated with Ovine Pulmonary Adenocarcinoma susceptibility/resistance Authors: Koldo Garcia-Etxebarria,Ramón A. Juste,Amaia Larruskain,Begoña M. Jugo,Inmaculada Arostegui,E. Minguijón,Bernardino Moreno Potential relationships between amino acid motifs of various alleles of the ovine major histocompatibility complex DR (Ovar-DR) molecule and occurrence of clinical OPA caused by JSRV were investigated in a case-control study. Latxa sheep (n=132) screened for presence/absence of pulmonary OPA… Elsevier BV	2012-11-01
Using Multidimensional Bayesian Network Classifiers to Assist the Treatment of Multiple Sclerosis Authors: David Arteta,Aritz Pérez,J.D. Rodriguez,Diego Tejedor,Jose A. Lozano Multiple sclerosis is an autoimmune disorder of the central nervous system and potentially the most common cause of neurological disability in young adults. The clinical disease course is highly variable and different multiple sclerosis subtypes can be defined depending on the progression of the… Institute of Electrical and Electronics Engineers (IEEE)	2012-11-01
Vertical cloud structure of the 2009 Jupiter impact based on HST/WFC3 observations Authors: Santiago Pérez-Hoyos,J. F. Sanz-Requena,John Clarke,Michael H. Wong,Keith S. Noll,Agustín Sánchez-Lavega,H. B. Hammel,G. S. Orton,Amy A. Simon-Miller,I. de Pater Abstract The impact of a body of unknown origin with Jupiter in July 2009 produced an intense perturbation of the planet’s atmosphere at the visible cloud levels. The vertical cloud structure was deeply affected by the presence of a strongly absorbing dense aerosol layer that was expanded… Elsevier BV	2012-11-01
Efficient design of a double‐band coplanar hybrid antenna using multi‐objective evolutionary programming Authors: Itziar Landa-Torres,Rocio Sanchez-Montero,Pablo López-Espí,J. Del Ser,Diana Manjarres,Sancho Salcedo-Sanz SUMMARYIn this paper, we propose the optimization of the parameters of a hybrid antenna for wireless applications by using a multi‐objective evolutionary programming (EP). Specifically, the antenna proposed is formed by a planar inverted‐F antenna and a coplanar patch, in the same structure. The… Wiley	2012-10-16
Asymptotic analysis of flooding in CSMA-based large scale ad-hoc wireless networks Authors: Javier Del Ser,Susana Pérez-Sánchez,Babak Hossein Khalaj,Seyed Pooya Shariatpanahi,Hamed Shah-Mansouri Abstract Abstract In this article, we study the asymptotic behavior of flooding in large scale wireless networks. Specifically, we derive an upper bound on the coverage of flooding when the number of nodes n in the network goes to infinity. We consider two… Springer Science and Business Media LLC	2012-10-12
Solution of the 3D-Helmholtz equation in exterior domains using spherical harmonic decomposition Authors: G. Garate,J. Santamaria,E.G. Vadillo,David Pardo AbstractThis work is devoted to a finite element formulation for the Helmholtz equation in exterior domains. The proposed formulation uses a separation of variables, combining a 2D FE discretization on an intermediate spherical boundary and an ‘a priori’ analytical pattern for the radial direction… Elsevier BV	2012-10-01
PlanetCam UPV/EHU: a simultaneous visible and near infrared lucky-imaging camera to study solar system objects Authors: Santiago Pérez-Hoyos,Ricardo Hueso,Agustín Sánchez-Lavega,Gaizka Murga,L. de Bilbao,Jose Félix Rojas,Javier Ariño PlanetCam is a two-channel camera designed primarily to observe the atmospheres of the planets (Venus, Mars, Jupiter, Saturn, Uranus and Neptune) and the satellite Titan simultaneously at visible (0.4-1 microns) and NIR (1-2.5 microns) wavelengths with high temporal and spatial resolution. This… SPIE	2012-09-24
Analysis of quantization effects on the performance of cooperative MIMO techniques in wireless networks Authors: Seyed Pooya Shariatpanahi,Javier Del Ser,Babak Hossein Khalaj,Hamed Shah-Mansouri Abstract The most successful achievable schemes for ad hoc wireless networks are those based on establishing cooperative multiple-input and multiple-output links. In this article, we analyze one of the important design parameters of such schemes, namely the number of quantization bits.… Springer Science and Business Media LLC	2012-09-18
Probing clouds in planets with a simple radiative transfer model: the Jupiter case Authors: Santiago Pérez-Hoyos,Agustín Sánchez-Lavega,I. Mendikoa Remote sensing of planets evokes using expensive on-orbit satellites and gathering complex data from space. However, the basic properties of clouds in planetary atmospheres can be successfully estimated with small telescopes even from an urban environment using currently available and affordable… IOP Publishing	2012-09-12
A high-temporal resolution algorithm to discriminate shockable from nonshockable rhythms in adults and children Authors: Elisabete Aramendi,Unai Irusta,Jesus Ruiz,Sofía Ruiz de Gauna,Erik Alonso,Unai Ayala To design the core algorithm of a high-temporal resolution rhythm analysis algorithm for automated external defibrillators (AEDs) valid for adults and children. Records from adult and paediatric patients were used all together to optimize and test the performance of the algorithm.A total of 574… Elsevier BV	2012-09-01
On the design of an heuristically optimized multiband spectrum sensing approach for cognitive radio systems Authors: A. Alonso,Uli Kretzschmar,J. Del Ser,Sergio Gil-Lopez,Armando Astarloa,M. Garay This extended abstract outlines a novel optimization approach for multi-band linear collaborative spectrum (LCS) sensing based on harmony search heuristics. Besides, the description of a centralized system architecture is also included in this manuscript, which is capable of processing the captured… IEEE	2012-09-01
A hybrid harmony search algorithm for the spread spectrum radar polyphase codes design problem Authors: Ángel M. Pérez-Bellido,Jose A. Portilla-Figueras,Javier Del Ser,Sancho Salcedo-Sanz,Sergio Gil-Lopez,José María Cabero In this paper we present the application of a hybrid harmony search (HS) algorithm to the Spread-Spectrum Radar Polyphase (SSRP) codes design. Such a design can be formulated as a non-linear max-min optimization problem, hard to be solved using classical numerical techniques. Soft-computing… Elsevier BV	2012-09-01
Hydrofracture diagnosis in open-hole and steel-cased wells using borehole resistivity measurements Authors: Carlos Torres-Verdín,David Pardo This work numerically evaluates the possibility of using electromagnetic (EM) measurements to diagnose and quantify hydraulic fractures that are artificially generated in a horizontal well. Hydrofractures are modeled as thin disks that are possibly non-perpendicular to the well, and are filled with… Society of Exploration Geophysicists	2012-09-01
Flexible Channel Coding Approach for Short-Length Codewords Authors: Mikel Hernaez,Javier Del Ser,Pedro M. Crespo 4 pages; submitted to IEEE Communications Letters Institute of Electrical and Electronics Engineers (IEEE)	2012-09-01
Differentiation in the Cloud: Methodology for Integrating Customer Values in Experience Design Authors: Bronan McCabe,Javier Del Ser,Kaisa Koskela-Huotari,Kaarina Karppinen,Andrey Sirotkin How do organizations know they are designing products and services that their customers will value? This paper describes the initial results of the first four stages of a methodology for integrating customer Values in Experience design (ViEx). The theory of universal value structure was adapted to… IEEE	2012-09-01
Mobile clouds: How to find opportunities Authors: Parishad Karimi,Mohammad Javad Salehi,Ghazal Fazelnia,Babak Hossein Khalaj,Marcos Katz,Javier Del Ser Smartphones can be regarded as resource pools which are capable of communicating with their outside world using both short-range and long-range links. Such communication capabilities provide a unique opportunity for sharing resources, resulting in new possibilities for end users. In this paper, we… IEEE	2012-09-01