Publications

Displaying 626 - 650 of 1307

Publication	Date
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
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
Study of the influence of different variables on membrane fouling in submerged membrane bioreactors Authors: D. Iturbe,E. Agirre,A. Urkiaga,J. Etxebarria AbstractMembrane fouling is still the greatest handicap to overcome in membrane bioreactor (MBR) technology. In this study, a multi-factorial experimental design was carried out in order to optimize the MBR process, studying the effect of major variables involved in the fouling phenomenon as well… Elsevier BV	2015-12-01
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, Yangxin,Pardo, David,Chen, Yuntian 11 pages, 4 figures, Optics Express, 2015 Optica Publishing Group	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
A spatial Bayesian network model to assess the benefits of early warning for urban flood risk to people Authors: Karin Tessa Hegetschweiler,Vahid Mojtahed,Vahid Mojtahed,Carlo Giupponi,Stefano Balbi,Ferdinando Villa Abstract. This article presents a novel methodology to assess flood risk to people by integrating people's vulnerability and ability to cushion hazards through coping and adapting. The proposed approach extends traditional risk assessments beyond material damages; complements quantitative and semi-… Copernicus GmbH	2015-10-29
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, Naiara,Mas, Albert,Vega, Luis 21 pages Springer Science and Business Media LLC	2015-10-17
Path Planning for Single Unmanned Aerial Vehicle by Separately Evolving Waypoints Authors: Yang, Peng,Tang, Ke,Lozano, Jose A.,Cao, Xianbin 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
A novel machine learning approach to the detection of identity theft in social networks based on emulated attack instances and support vector machines Authors: Villar-Rodríguez, E.,Del Ser, Javier,Torre-Bastida, A. I.,Bilbao, M. N.,Salcedo-Sanz, Sancho SummaryThe proliferation of social networks and their usage by a wide spectrum of user profiles has been specially notable in the last decade. A social network is frequently conceived as a strongly interlinked community of users, each featuring a compact neighborhood tightly and actively connected… Wiley	2015-09-20
A new approach to categorising continuous variables in prediction models: Proposal and validation Authors: Irantzu Barrio,Inmaculada Arostegui,Inmaculada Arostegui,María Xosé Rodríguez-Álvarez,José-María Quintana When developing prediction models for application in clinical practice, health practitioners usually categorise clinical variables that are continuous in nature. Although categorisation is not regarded as advisable from a statistical point of view, due to loss of information and power, it is a… SAGE Publications	2015-09-18
A method to measure ventilation rate during cardiopulmonary resuscitation using the capnogram Authors: Elisabete Aramendi,Erik Alonso,James K. Russell,Beatriz Chicote,Mohamud Daya,Unai Irusta,Andoni Elola The survival rate in cardiac arrest is associated to the quality of the chest compressions (CCs) and ventilations provided during cardiopulmonary resuscitation (CPR). Hyperventilation remains common whenever ventilation is manual during resuscitation from cardiac arrest. The capnogram is used to… IEEE	2015-09-01
An agent-oriented hierarchic strategy for solving inverse problems Authors: Smołka, Maciej,Schaefer, Robert,Paszyński, Maciej,Pardo, David,Álvarez-Aramberri, Julen Abstract The paper discusses the complex, agent-oriented hierarchic memetic strategy (HMS) dedicated to solving inverse parametric problems. The strategy goes beyond the idea of two-phase global optimization algorithms. The global search performed by a tree of dependent demes is… University of Zielona Góra, Poland	2015-09-01
On the heritability of dandelion-encoded harmony search heuristics for tree optimization problems Authors: Perfecto, Cristina,Bilbao, Miren Nekane,Del Ser, Javier,Ferro, Armando Tree based optimization problems stand for those paradigms where solutions can be arranged within a tree-like graph whose nodes represent the optimization variables of the problem at hand and their interconnecting edges topological and/or hierarchical relationships between such variables. In this… IEEE	2015-09-01
Sample entropy as a shock outcome predictor during basis life support Authors: Beatriz Chicote,Carlos Corcuera,Elisabete Aramendi,Daniel Alonso,Unai Irusta,Carlos Jover Optimizing defibrillation times may improve survival from ventricular fibrillation (VF) cardiac arrest. VF waveform analysis is one of the best non-invasive decision tools for shock outcome prediction. This study introduces a VF-waveform feature based on the computation of the sample entropy (… IEEE	2015-09-01
Comprehensive characterization of the behaviors of estimation of distribution algorithms Authors: Carlos Echegoyen,Roberto Santana,Alexander Mendiburu,Jose A. Lozano Estimation of distribution algorithms (EDAs) are a successful example of how to use machine learning techniques for designing robust and efficient heuristic search algorithms. Understanding the relationship between EDAs and the space of optimization problems is a fundamental issue for the… Elsevier BV	2015-09-01
Is it possible to improve the prediction ability of the BODE index? Authors: Irantzu Barrio,Cristóbal Esteban,Alberto Capelastegui,Inmaculada Arostegui,Txomin Zabala,Francisco Javier Moraza,Myriam Aburto,Helena Azcuna,Amaia Aramburu Between January 2003-2004 543 patients with COPD (FEV1 Results: Out of the 543 patients, 96% were male (average age of 68 years, BMI 28.3, 2.4±1.4 in Charlson and FEV1 of 55.0±13.1%). Regarding dyspnea, 48.6% reported dyspnea grade 2(MRC). The average distance covered in the 6MWT was 408.9±92.… European Respiratory Society (ERS)	2015-09-01
A Critical Review of Robustness in Power Grids Using Complex Networks Concepts Authors: Lucas Cuadra,Sancho Salcedo-Sanz,Javier Del Ser,Silvia Jiménez-Fernández,Zong Geem This paper reviews the most relevant works that have investigated robustness in power grids using Complex Networks (CN) concepts. In this broad field there are two different approaches. The first one is based solely on topological concepts, and uses metrics such as mean path length, clustering… MDPI AG	2015-08-28