• Nyström discretizations of boundary integral equations for the solution of 2D elastic scattering problems 

      Domínguez Baguena, Víctor Upna Orcid; Turc, Catalin (Elsevier, 2024)   Artículo / Artikulua
      We present three high-order Nyström discretization strategies of various boundary integral equation formulations of the impenetrable time-harmonic Navier equations in two dimensions. One class of such formulations is ...
    • Large-scale unsupervised spatio-temporal semantic analysis of vast regions from satellite images sequences 

      Echegoyen Arruti, Carlos; Pérez, Aritz; Santafé Rodrigo, Guzmán Upna Orcid; Pérez-Goya, Unai Upna Orcid; Ugarte Martínez, María Dolores Upna Orcid (Springer, 2024)   Artículo / Artikulua  OpenAccess
      Temporal sequences of satellite images constitute a highly valuable and abundant resource for analyzing regions of interest. However, the automatic acquisition of knowledge on a large scale is a challenging task due to ...
    • UAVradio: Radio link path loss estimation for UAVs 

      Aláez Gómez, Daniel; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Villadangos Alonso, Jesús Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      The UAVRadio Python module is a comprehensive toolkit designed to facilitate the analysis and prediction of radio signal path loss in Unmanned Aerial Vehicle (UAV) communication scenarios. The module encompasses a range ...
    • A study on the suitability of different pooling operators for convolutional neural networks in the prediction of COVID-19 through chest x-ray image analysis 

      Rodríguez Martínez, Iosu Upna Orcid; Ursúa Medrano, Pablo; Fernández Fernández, Francisco Javier Upna Orcid; Takáč, Zdenko; Bustince Sola, Humberto Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      The 2019 coronavirus disease outbreak, caused by the severe acute respiratory syndrome type-2 virus (SARS-CoV-2), was declared a pandemic in March 2020. Since its emergence to the present day, this disease has brought ...
    • Body composition and resting energy expenditure in a group of children with achondroplasia 

      Garde-Etayo, Laura; Trandafir, Paula Camelia Upna Orcid; Saint-Laurent, Céline; Ugarte Martínez, María Dolores Upna Orcid; Insausti Serrano, Ana María Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Background: Persons with achondroplasia develop early obesity, which is a comorbidity associated with other complications. Currently, there are no validated specific predictive equations to estimate resting energy expenditure ...
    • Comment on 'Effects of Vivifrail multicomponent intervention on functional capacity' by Casas-Herrero et al.-The authors reply. 

      Sanchez Sanchez, Juan luis; Izquierdo Redín, Mikel; López Saez de Asteasu, Mikel; Antón Rodrigo, Iván; Galbete Jiménez, Arkaitz Upna Orcid; Álvarez Bustos, Alejandro; Casas Herrero, Álvaro Upna (Wiley, 2024)   Artículo / Artikulua  OpenAccess
      In this response letter, we would like to clarify some aspects related to the methodology and inferences derived from our work entitled 'Effects of Vivifrail multicomponent intervention on functional capacity', which was ...
    • High-dimensional order-free multivariate spatial disease mapping 

      Vicente Fuenzalida, Gonzalo; Adin Urtasun, Aritz Upna Orcid; Goicoa Mangado, Tomás; Ugarte Martínez, María Dolores Upna Orcid (Springer, 2023)   Artículo / Artikulua  OpenAccess
      Despite the amount of research on disease mapping in recent years, the use of multivariate models for areal spatial data remains limited due to difficulties in implementation and computational burden. These problems are ...
    • Robots for elderly care: review, multi-criteria optimization model and qualitative case study 

      Sawik, Bartosz; Tobis, Sławomir; Baum, Ewa; Suwalska, Aleksandra; Kropińska, Sylwia; Stachnik, Katarzyna; Pérez-Bernabeu, Elena; Cildoz Esquíroz, Marta Upna Orcid; Agustín Martín, Alba; Wieczorowska-Tobis, Katarzyna. (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      This paper focuses on three areas: the first is a review of current knowledge about social and service robots for elderly care. The second is an optimization conceptual model aimed at maximizing the efficiency of assigning ...
    • A multi-splitting method to solve 2D parabolic reaction-diffusion singularly perturbed systems 

      Clavero, Carmelo; Jorge Ulecia, Juan Carlos Upna Orcid (Elsevier, 2023)   Artículo / Artikulua
      In this paper we design and analyze a numerical method to solve a type of reaction-diffusion 2D parabolic singularly perturbed systems. The method combines the central finite difference scheme on an appropriate piecewise ...
    • Uniform convergent expansions of the error function in terms of elementary functions 

      Ferreira González, Chelo Upna; López García, José Luis Upna Orcid; Pérez Sinusía, Ester Upna Orcid (Springer, 2023)   Artículo / Artikulua  OpenAccess
      We derive a new analytic representation of the error function erfz in the form of a convergent series whose terms are exponential and rational functions. The expansion holds uniformly in z in the double sector | arg (±z) ...
    • Space mission risk, sustainability and supply chain: review, multi-objective optimization model and practical approach 

      Sawik, Bartosz (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      This paper investigates the convergence of risk, sustainability, and supply chain in space missions, including a review of fundamental concepts, the introduction of a multi-objective conceptual optimization model, and ...
    • Semiorders and continuous Scott–Suppes representations. Debreu’s Open Gap Lemma with a threshold 

      Estevan Muguerza, Asier Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The problem of finding a utility function for a semiorder has been studied since 1956, when the notion of semiorder was introduced by Luce. But few results on continuity and no result like Debreu’s Open Gap Lemma, but for ...
    • Association of intrinsic capacity with respiratory disease mortality 

      Ramírez Vélez, Robinson; Iriarte-Fernández, María; Santafé Rodrigo, Guzmán Upna Orcid; Malanda Trigueros, Armando Upna Orcid; Beard, John R.; García Hermoso, Antonio; Izquierdo Redín, Mikel (Elsevier, 2023)   Artículo / Artikulua
      The World Health Organization (WHO) introduced a framework for healthy aging in 2015 that emphasizes functional ability instead of absence of disease. Healthy ageing is defined as “the process of building and maintaining ...
    • Analysis of bright bolides recorded between October and November 2022 by the Southwestern Europe Meteor Network 

      Madiedo, J. M.; Ortiz, J. L.; Izquierdo, J.; Santos-Sanz, P.; Aceituno, J.; Guindos, E. de; Yanguas Sayas, Patricia Upna Orcid; Palacián Subiela, Jesús Francisco Upna Orcid; San Segundo, A.; Ávila, D.; Tosar, B.; Gómez-Hernández, A.; Gómez-Martínez, Juan; García, Antonio; Aimee, A. I. (MeteorNews, 2023)   Artículo / Artikulua  OpenAccess
      We present in this work the analysis of some of the bright fireballs spotted in the framework of the Southwestern Europe Meteor Network (SWEMN) between October and November 2022. They have been observed from the Iberian ...
    • Quadcopter neural controller for take-off and landing in windy environments 

      Olaz Moratinos, Xabier; Aláez Gómez, Daniel; Prieto Míguez, Manuel; Villadangos Alonso, Jesús Upna Orcid; Astrain Escola, José Javier Upna Orcid (Elsevier, 2023)   Artículo / Artikulua
      This paper proposes the design of a quadcopter neural controller based on Reinforcement Learning (RL) for controlling the complete maneuvers of landing and take-off, even in variable windy conditions. To facilitate RL ...
    • Quantifying external information in social network analysis: an application to comparative mythology 

      Fumanal Idocin, Javier Upna Orcid; Cordón García, Óscar; Pereira Dimuro, Graçaliz Upna Orcid; Roldán López de Hierro, Antonio Francisco; Bustince Sola, Humberto Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      Social network analysis is a popular tool to understand the relationships between interacting agents by studying the structural properties of their connections. However, this kind of analysis can miss some of the domain-specific ...
    • Efecto del contacto y la actitud en la motivación de aprendices de español L2 en un programa de estudios en el extranjero 

      López Pérez, María Victoria Upna Orcid; Moler Cuiral, José Antonio Upna Orcid (Taylor & Francis, 2023)   Artículo / Artikulua  OpenAccess
      Este artículo analiza el grado y el tipo de motivación en 97 estudiantes deespañol L2 universitarios en un programa de estudios en el extranjero(PREE). También indaga sobre el efecto del contacto conhispanohablantes ...
    • A multistate model and its standalone tool to predict hospital and ICU occupancy by patients with COVID-19 

      Lafuente, Miguel; López, Francisco Javier; Mateo, Pedro; Cebrián, Ana Carmen; Asín, Jesús; Moler Cuiral, José Antonio Upna Orcid; Borque-Fernando, Ángel; Esteban, Luis Mariano; Pérez-Palomares, Ana; Sanz, Gerardo (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Objective: This study aims to build a multistate model and describe a predictive tool for estimating the daily number of intensive care unit (ICU) and hospital beds occupied by patients with coronavirus 2019 disease ...
    • Acuity-based rotational patient-to-physician assignment in an emergency department using electronic health records in triage 

      Cildoz Esquíroz, Marta Upna Orcid; Ibarra Bolt, Amaya; Mallor Giménez, Fermín Upna Orcid (SAGE, 2023)   Artículo / Artikulua  OpenAccess
      Emergency department (ED) operational metrics generated by a new acuity-based rotational patient-to-physician assignment (ARPA) algorithm are compared with those obtained with a simple rotational patient assignment (SRPA) ...
    • Hierarchical spatio-temporal change-point detection 

      Moradi, Mohammad Mehdi Upna Orcid; Cronie, Ottmar; Pérez Goya, Unai Upna Orcid; Mateu, Jorge (Taylor and Francis Group, 2023)   Artículo / Artikulua  OpenAccess
      Detecting change-points in multivariate settings is usually carried out by analyzing all marginals either independently, via univariate methods, or jointly, through multivariate approaches. The former discards any inherent ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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