BackExaminar por departamento (cas.) "Matemática Aplicada, Estadística e Investigación Operativa"
Now showing items 1-20 of 45
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A Decision Tree to Assess Short-Term Mortality After an Emergency Department Visit for an Exacerbation of COPD: a Cohort Study
Esteban, Cristóbal; Arostegui Madariaga, Inmaculada
; García Gutiérrez, Susana; González Hernández, Nerea; Lafuente Guerrero, Iratxe; Baré Mañas, Marisa; Fernández de Larrea, Nerea; Rivas Ruiz, Francisco; Quintana López, José María (Biomed Central, 2015-12-22)
Background: 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 ... -
A note on the implementation of the BFC-MSMIP algorithm in C++ by using COIN-OR as an optimization engine
; Garín Martín, María Araceli; Merino Maestre, María ; Pérez Sainz de Rozas, Gloria (2010)
The aim of this technical report is to present some detailed explanations in order to help to understand and use the algorithm Branch and Fix Coordination for solving MultiStage Mixed Integer Problems (BFC- MSMIP). We have ... -
A parallelizable algorithmic framework for solving large scale multi-stage stochastic mixed 0-1 problems under uncertainty
Escudero Bueno, Laureano F.; Garín Martín, María Araceli; Merino Maestre, María ; Pérez Sainz de Rozas, Gloria (2011-02)
In this paper we present a parallelizable scheme of the Branch-and-Fix Coordination algorithm for solving medium and large scale multi-stage mixed 0-1 optimization problems under uncertainty. The uncertainty is represented ... -
A summary of my twenty years of research according to Google Scholars
Pardo Zubiaur, David (2018-03-26)
I am David Pardo, a researcher from Spain working mainly on numerical analysis applied to geophysics. I am 40 years old, and over a decade ago, I realized that my performance as a researcher was mainly evaluated based ... -
A two-stage stochastic integer programming approach
Escudero Bueno, Laureano F.; Garín Martín, María Araceli; Merino Maestre, María ; Pérez Sainz de Rozas, Gloria (2005)
We present an algorithmic approach for solving two-stage stochastic mixed 0-1 problems. The first stage constraints of the Deterministic Equivalent Model have 0--1 variables and continuous variables. The approach uses the ... -
Accurate Determination of the Q Quality Factor in Magnetoelastic Resonant Platforms for Advanced Biological Detection
; ; Lasheras Aransay, Andoni; Muto Foresi, Virginia ; ; ; (MDPI, 2018-03)
The main parameters of magnetoelastic resonators in the detection of chemical (i.e., salts, gases, etc.) or biological (i.e., bacteria, phages, etc.) agents are the sensitivity S (or external agent change magnitude per Hz ... -
Analysis of latent tuberculosis and mycobacterium avium infection data using mixture models
(BioMed Central, 2006-09-28)Background: Estimation of the frequency of latent tuberculosis infection (LTBI) is difficult in areas with low tuberculosis infection rates and high exposure to non-tuberculous mycobacteria (NTM), including BCG vaccination. ... -
Chronic Obstructive Pulmonary Disease Subtypes. Transitions over Time
Esteban, Cristóbal; Arostegui Madariaga, Inmaculada; Aburto, Myriam; Moraza, Javier; Quintana, José M.; García Loizaga, Amaia; Basualdo, Luis V.; Aramburu, Amaia; Aizpiri, Susana; Uranga, Ane; Capelastegui, Alberto (Public Library Science, 2016-09-09)
Background Although subtypes of chronic obstructive pulmonary disease are recognized, it is unknown what happens to these subtypes over time. Our objectives were to assess the stability of cluster-based subtypes in ... -
Derivatives of the diameter and the area of a connected component of the pseudospectrum
(International Linear Algebra Society, 2011-01-01)The paper concerns the relation between the following two quantities. (i) The Hölder condition number of an eigenvalue λ of a square complex matrix. (ii) The rate of growth of the diameter and the area of the connected ... -
Development of appropriateness explicit criteria for cataract extraction by phacoemulsification
Quintana López, José María; Escobar, Antonio; Arostegui Madariaga, Inmaculada (BioMed Central, 2006-03)
Background: Consensus development techniques were used in the late 1980s to create explicit criteria for the appropriateness of cataract extraction. We developed a new appropriateness of indications tool for cataract ... -
Effect of vitamin E administered to men in infertile couples on sperm and assisted reproduction outcomes: a double-blind randomized study
Matorras Weinig, José Roberto; Pérez Sanz, Jairo; Corcóstegui, Beatriz; Pérez Ruiz, Irantzu; Malaina Celada, Iker; Quevedo, Sara María; Aspichueta Vivanco, Fermín; Crisol, Lorena; Martinez Indart, Lorea; Prieto Molano, María Begoña; Expósito Navarro, María Antonia (Elsevier, 2020-12)
Objective: To evaluate the influence on sperm parameters and invitro fertilization (IVF) outcomes of the administration of 400 mg/day of vitamin E for 3 months to men from infertile couples who are undergoing IVF. Design: ... -
Euskal Autonomia Erkidegoko kolon eta ondesteko minbiziaren baheketa programan parte-hartzean lehen mailako arretak duen rola
Unanue Arza, Saloa (2019-04-04)
El Cáncer Colorrectal es el de mayor incidencia y mortalidad en la Comunidad Autónoma del País Vasco. En el año 2009 se implementó el programa de cribado dirigido a la población de 50-69 años y desde entonces se ha conseguido ... -
Explicit-in-time variational formulations for goal-oriented adaptivity.
(2019-10-01)Goal-Oriented Adaptivity (GOA) is a powerful tool to accurately approximate physically relevantfeatures of the solution of Partial Differential Equations (PDEs). It delivers optimal grids to solvechallenging engineering ... -
Fast one-dimensional finite element approximation of geophysical measurements
(2018-11-14)When inverting Logging-While-Drilling (LWD) resistivity measurements, it is a common practice to consider a one-dimensional (1D) layered media to reduce the problem dimensionality using a Hankel transform. Using orthogonality ... -
FLBEIA fisheries management simulation model. Definition of new criteria and guidelines for efficient validation of the model using global sensitivity analysis
(2020-06-05)En esta tesis se ha desarrollado el modelo bio-económico de simulación pesquera FLBEIA y se han definido una serie de direcciónes para validarlo y fomentar la validación de los modelos de simulación pesquera. El modelo ... -
Global Self-Regulation of the Cellular Metabolic Structure
Martínez de la Fuente Martínez, Ildefonso Abel; Vadillo Arroyo, Fernando; Pérez Samartín, Alberto Luis; Pérez Pinilla, Martín Blas ; Bidaurrazaga Van Dierdonck, Joseba; Vera López, Antonio (Public Library of Science, 2010-03-02)
Background: Different studies have shown that cellular enzymatic activities are able to self-organize spontaneously, forming a metabolic core of reactive processes that remain active under different growth conditions while ... -
Goal-oriented adaptivity using unconventional error representations
Darrigrand, Vincent (2017-09-01)
In Goal-Oriented Adaptivity (GOA), the error in the Quantity of Interest (QoI) is represented using the error functions of the direct and adjoint problems. This error representation is subsequently bounded above by ... -
Goal-Oriented p-Adaptivity using Unconventional Error Representations for a 1D Steady State Convection-Diffusion Problem
Darrigrand, Vincent; Rodríguez Rozas, Ángel; Pardo Zubiaur, David ; Muga, Ignacio (Elsevier, 2017)
This work proposes the use of an alternative error representation for Goal-Oriented Adaptivity (GOA) in context of steady state convection dominated diffusion problems. It introduces an arbitrary operator for the computation ... -
Hierarchical modelling of patient-reported outcomes data based on the beta-binomial distribution
(2017-12-13)The beta-binomial distribution does not belong to the exponential family and, hence classical regression techniquescannot be used when dealing with outcomes following the mentioned distribution.In this thesis we propose ... -
hp-Adaptive simulation and inversion of magnetotelluric measurements
(2015-12-18)The magnetotelluric (MT) method is a passive exploration technique that aims at estimating the resistivity distribution of the Earth’s subsurface, and therefore at providing an image of it. This process is divided into two ...