Publications

Displaying 576 - 600 of 1227

Publication	Date
Similarity Measure Selection for Clustering Time Series Databases Authors: Jose A. Lozano,Usue Mori,Alexander Mendiburu In the past few years, clustering has become a popular task associated with time series. The choice of a suitable distance measure is crucial to the clustering process and, given the vast number of distance measures for time series available in the literature and their diverse characteristics, this… Institute of Electrical and Electronics Engineers (IEEE)	2016-01-01
Joint Topology Optimization, Power Control and Spectrum Allocation for Intra-Vehicular Multi-hop Sensor Networks Using Dandelion-Encoded Heuristics Authors: Del Ser, J.,Bilbao, M.N.,Perfecto, C.,Gonzalez-Pardo, A.,Campos-Cordobes, S. In the last years the interest in multi-hop communications has gained momentum within the research community due to the challenging characteristics of the intra-vehicular radio environment and the stringent robustness imposed on critical sensors within the vehicle. As opposed to point-to-point… Springer International Publishing	2016-01-01
iUBC at SemEval-2016 Task 2: RNNs and LSTMs for interpretable STS Authors: Montse Maritxalar,Iñigo Lopez-Gazpio,Eneko Agirre Association for Computational Linguistics (ACL)	2016-01-01
Estimating Attraction Basin Sizes Authors: Alexander Mendiburu,Jose A. Lozano,Jose A. Lozano,Leticia Hernando The performance of local search algorithms is influenced by the properties that the neighborhood imposes on the search space. Among these properties, the number of local optima has been traditionally considered as a complexity measure of the instance, and different methods for its estimation have… Springer International Publishing	2016-01-01
To interrupt, or not to interrupt chest compressions for ventilation: that is the question! Authors: Unai Irusta,Elisabete Aramendi Out-of-hospital cardiac arrest (OHCA) is one of the leading causes of death in the industrialized world, with an average global incidence of 55 cases per 100,000 person-year (1). OHCA is a major public health problem. Every 5 years leading institutions like the European Resuscitation Council (ERC)… AME Publishing Company	2016-01-01
A Priori Fourier Analysis for 2.5D Finite Elements Simulations of Logging-While-Drilling (LWD) Resistivity Measurements Authors: Rodríguez-Rozas, Ángel,Pardo, David Triaxial induction measurements provided by LWD tools generate crucial petrophysical data to determine several quantities of interest around the drilled formation under exploration, such as a map of resistivities. However, the corresponding forward modeling requires the simulation of a large-scale… Elsevier BV	2016-01-01
Intelligent SPARQL Endpoints: Optimizing Execution Performance by Automatic Query Relaxation and Queue Scheduling Authors: Miren Nekane Bilbao,Javier Del Ser,Javier Del Ser,Ana I. Torre-Bastida,Esther Villar-Rodriguez The Web of Data is widely considered as one of the major global repositories populated with countless interconnected and struc- tured data prompting these linked datasets to be continuously and sharply increasing. In this context the so-called SPARQL Protocol and RDF Query Language is commonly used… Springer International Publishing	2016-01-01
Fusion-based Variational Image Dehazing Authors: Adrian Galdran,Javier Vazquez-Corral,David Pardo,Marcelo Bertalmio We propose a novel image-dehazing technique based on the minimization of two energy functionals and a fusion scheme to combine the output of both optimizations. The proposed fusion-based variational image-dehazing (FVID) method is a spatially varying image enhancement process that first minimizes a… Institute of Electrical and Electronics Engineers (IEEE)	2016-01-01
Weak supervision and other non-standard classification problems: A taxonomy Authors: Jerónimo Hernández-González,Iñaki Inza,Jose A. Lozano A taxonomy of weakly supervised classification problems.Weak supervision in learning and prediction stages.Problem structure: instance-label relationship.Organization of the field: similarities and differences among frameworks.Revealing unexplored challenging frameworks. In recent years, different… Elsevier BV	2016-01-01
Distance Measures for Time Series in R: The TSdist Package Authors: Alexander Mendiburu,Jose A. Lozano,Usue Mori The R Foundation	2016-01-01
Filtering mechanical chest compression artefacts from out-of-hospital cardiac arrest data Authors: Elisabete Aramendi,Unai Ayala,Jo Kramer-Johansen,Trygve Eftestøl,H. Naas,Unai Irusta Filtering techniques to remove manual compression artefacts from the ECG have not been incorporated to defibrillators to diagnose the rhythm during cardiopulmonary resuscitation. Mechanical and manual compression artefacts may be very different. The aim of this study is to characterize the… Elsevier BV	2016-01-01
A Note on the Boltzmann Distribution and the Linear Ordering Problem Authors: Alexander Mendiburu,Jose A. Lozano,Jose A. Lozano,Josu Ceberio The Boltzmann distribution plays a key role in the field of optimization as it directly connects this field with that of probability. Basically, given a function to optimize, the Boltzmann distribution associated to this function assigns higher probability to the candidate solutions with better… Springer International Publishing	2016-01-01
PerMallows: AnRPackage for Mallows and Generalized Mallows Models Authors: Ekhine Irurozki,Borja Calvo,Jose A. Lozano In this paper we present the R package PerMallows, which is a complete toolbox to work with permutations, distances and some of the most popular probability models for permutations: Mallows and the Generalized Mallows models. The Mallows model is an exponential location model, considered as… Foundation for Open Access Statistic	2016-01-01
A Computer-Aided SAS Macro for the Evaluation of the Simulation Performances in Missingness Settings Authors: Urko Aguirre,Inmaculada Arostegui,José M. Quintana Model validation has become a topic of great interest to many fields such as industry, medicine or even to government. Its main challenge is to provide stable and credible tools so that the decision-maker with the information necessary can make high-consequence judgments. This process requires… MDPI AG	2015-12-07
Categorisation of continuous variables in a logistic regression model using the R package CatPredi Authors: Inmaculada Arostegui,Inmaculada Arostegui,María Xosé Rodríguez-Álvarez,Irantzu Barrio Prediction models are gaining importance in many areas such as medicine, meteorology, finance, toxicology, etc. In this context, a common distribution for the response variable is the binomial distribution and hence the logistic regression model is a commonly used regression modelling approach.… MDPI AG	2015-12-04
A Boltzmann-Based Estimation of Distribution Algorithm for a General Resource Scheduling Model Authors: Jose A. Lozano,Huaping Chen,Xinle Liang Most researchers employed common functional models when managing scheduling problems with controllable processing times. However, in many complicated manufacturing systems with a high diversity of jobs, these functional resource models fail to reflect their specific characteristics. To fulfill… Institute of Electrical and Electronics Engineers (IEEE)	2015-12-01
A decision tree to assess short-term mortality after an emergency department visit for an exacerbation of COPD: a cohort study Authors: Iratxe Lafuente,Inmaculada Arostegui,Inmaculada Arostegui,Nerea González,Francisco Rivas,Susana Garcia-Gutierrez,Nerea Fernández de Larrea,José M. Quintana,Marisa Baré,Cristóbal Esteban Creating an easy-to-use instrument to identify predictors of short-term (30/60-day) mortality after an exacerbation of chronic obstructive pulmonary disease (eCOPD) could help clinicians choose specific measures of medical care to decrease mortality in these patients. The objective of this study… Springer Science and Business Media LLC	2015-12-01
Hardy Uncertainty Principle, Convexity and Parabolic Evolutions Authors: Escauriaza, L.,Kenig, C.E.,Ponce, G.,Vega, L. We give a new proof of the $L^2$ version of Hardy's uncertainty principle based on calculus and on its dynamical version for the heat equation. The reasonings rely on new log-convexity properties and the derivation of optimal Gaussian decay bounds for solutions to the heat equation with Gaussian… Springer Science and Business Media LLC	2015-11-26
Fourier finite element modeling of light emission in waveguides: 25-dimensional FEM approach Authors: Ou, Y.,Pardo, D.,Chen, Y. 11 pages, 4 figures, Optics Express, 2015 The Optical Society	2015-11-11
Impact of element-level static condensation on iterative solver performance Authors: Pardo, D.,Álvarez-Aramberri, J.,Paszynski, M.,Dalcin, L.,Calo, V.M. This paper provides theoretical estimates that quantify and clarify the savings associated to the use of element-level static condensation as a first step of an iterative solver. These estimates are verified numerically. The numerical evidence shows that static condensation at the element level is… Elsevier BV	2015-11-01
A secondary field based hp-Finite Element Method for the simulation of magnetotelluric measurements Authors: Julen Álvarez-Aramberri,Julen Álvarez-Aramberri,Julen Álvarez-Aramberri,David Pardo,David Pardo,David Pardo,Hélène Barucq,Hélène Barucq In some geophysical problems, it is sometimes possible to divide the subsurface resistivity distribution as a one dimensional (1D) contribution plus some two dimensional (2D) inhomogeneities. Assuming this scenario, we split the electromagnetic fields into their primary and secondary components,… Elsevier BV	2015-11-01
Relative frequencies of constrained events in stochastic processes: An analytical approach Authors: J.C. de la Cal,Dmitri Sokolovski,Dmitri Sokolovski,Nicholas Ballard,Elena Akhmatskaya,Elena Akhmatskaya,Simone Rusconi The stochastic simulation algorithm (SSA) and the corresponding Monte Carlo (MC) method are among the most common approaches for studying stochastic processes. They rely on knowledge of interevent probability density functions (PDFs) and on information about dependencies between all possible events… American Physical Society (APS)	2015-10-19
An Isoperimetric-Type Inequality for Electrostatic Shell Interactions for Dirac Operators Authors: Arrizabalaga, N.,Mas, A.,Vega, L. 21 pages Springer Science and Business Media LLC	2015-10-17
Path Planning for Single Unmanned Aerial Vehicle by Separately Evolving Waypoints Authors: Yang, P.,Tang, K.,Lozano, J.A.,Cao, X. Evolutionary algorithm-based unmanned aerial vehicle (UAV) path planners have been extensively studied for their effectiveness and flexibility. However, they still suffer from a drawback that the high-quality waypoints in previous candidate paths can hardly be exploited for further evolution, since… Institute of Electrical and Electronics Engineers (IEEE)	2015-10-01
Short-term effects on antioxidant enzymes and long-term genotoxic and carcinogenic potential of CuO nanoparticles compared to bulk CuO and ionic copper in mussels Mytilus galloprovincialis Authors: Pamela Ruiz,Alberto Katsumiti,Jose A. Nieto,Jaume Bori,Alba Jimeno-Romero,Paul Reip,Inmaculada Arostegui,Amaia Orbea,Miren P. Cajaraville The aim of this work was to study short-term effects on antioxidant enzyme activities and long-term genotoxic and carcinogenic potential of CuO nanoparticles (NPs) in comparison to bulk CuO and ionic copper in mussels Mytilus galloprovincialis after 21 days exposure to 10 μg Cu L(-1). Then, mussels… Elsevier BV	2015-10-01