• 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 ...
    • Ultrametrics for context-aware comparison of binary images 

      López Molina, Carlos Upna Orcid; Iglesias Rey, Sara Upna Orcid; Baets, Bernard de (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Quantitative image comparison has been a key topic in the image processing literature for the past 30 years. The reasons for it are diverse, and so is the range of applications in which measures of comparison are needed. ...
    • Unconditional and quasi-greedy bases in L-p with applications to Jacobi polynomials Fourier series 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L.; Ciaurri, Óscar; Varona, Juan L. (European Mathematical Society, 2019)   Artículo / Artikulua  OpenAccess
      We show that the decreasing rearrangement of the Fourier series with respect to the Jacobi polynomials for functions in L-p does not converge unless p = 2. As a by-product of our work on quasi-greedy bases in L-p(µ), we ...
    • A unified view of different axiomatic measures defined on L-fuzzy sets 

      Couso, Inés; Bustince Sola, Humberto Upna Orcid; Sánchez, Luciano (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      The recent literature contains a multitude of extensions of (axiomatic) notions from the context of ordinary fuzzy sets to more general contexts. Using the language of lattices, we provide a general and compact formulation ...
    • Uniform approximations of the first symmetric elliptic integral in terms of elementary functions 

      Bujanda Cirauqui, Blanca Upna Orcid; López García, José Luis Upna Orcid; Pagola Martínez, Pedro Jesús Upna; Palacios Herrero, Pablo Upna Orcid (Springer, 2022)   Artículo / Artikulua  OpenAccess
      We consider the standard symmetric elliptic integral RF(x, y, z) for complex x, y, z. We derive convergent expansions of RF(x, y, z) in terms of elementary functions that hold uniformly for one of the three variables x, y ...
    • Uniform convergent expansions of integral transforms 

      López García, José Luis Upna Orcid; Palacios Herrero, Pablo Upna Orcid; Pagola Martínez, Pedro Jesús Upna (American Mathematical Society, 2021)   Artículo / Artikulua  OpenAccess
      Several convergent expansions are available for most of the special functions of the mathematical physics, as well as some asymptotic expansions [NIST Handbook of Mathematical Functions, 2010]. Usually, both type of ...
    • 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) ...
    • Uniformly convergent expansions for the generalized hypergeometric functions p –1Fp and pFp 

      López García, José Luis Upna Orcid; Pagola Martínez, Pedro Jesús Upna; Karp, D. B. (Taylor & Francis, 2020)   Artículo / Artikulua  OpenAccess
      We derive a convergent expansion of the generalized hypergeometric function p−1 F p in terms of the Bessel functions 0 F 1 that holds uniformly with respect to the argument in any horizontal strip of the complex plane. We ...
    • A uniformly convergent scheme to solve two-dimensional parabolic singularly perturbed systems of reaction-diffusion type with multiple diffusion parameters 

      Clavero, Carmelo; Jorge Ulecia, Juan Carlos Upna Orcid (John Wiley & Sons Ltd, 2021)   Artículo / Artikulua
      In this work, we deal with solving two-dimensional parabolic singularly perturbed systems of reaction-diffusion type where the diffusion parameters at each equation of the system can be small and of different scale. In ...
    • A unique cardiac electrocardiographic 3D model. Toward interpretable AI diagnosis 

      Rueda, Cristina; Rodríguez Collado, Alejandro; Fernández, Itziar; Canedo, Christian; Ugarte Martínez, María Dolores Upna Orcid; Larriba, Yolanda (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Mathematical models of cardiac electrical activity are one of the most important tools for elucidating information about heart diagnostics. In this paper, we present an efficient mathematical formulation for this modeling ...
    • Uniqueness of unconditional basis of Hp(T) ⊕ 2 and Hp(T) ⊕ T (2) for 0 < p < 1 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L.; Wojtaszczyk, Przemyslaw (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Our goal in this paper is to advance the state of the art of the topic of uniqueness of unconditional basis. To that end we establish general conditions on a pair (X, Y) formed by a quasi-Banach space X and a Banach ...
    • Uniqueness of unconditional basis of infinite direct sums of quasi-Banach spaces 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L. (Kluwer Academic Publishers, 2022)   Artículo / Artikulua  OpenAccess
      This paper is devoted to providing a unifying approach to the study of the uniqueness of unconditional bases, up to equivalence and permutation, of infinite direct sums of quasi-Banach spaces. Our new approach to this type ...
    • Uniqueness of unconditional basis of ℓ2⊕T(2) 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L. (American Mathematical Society, 2022)   Artículo / Artikulua  OpenAccess
      We provide a new extension of Pitt’s theorem for compact operators between quasi-Banach lattices which permits to describe unconditional bases of finite direct sums of Banach spaces X1 · · · Xn as direct sums of unconditional ...
    • Unpaired spatio-temporal fusion of image patches (USTFIP) from cloud covered images 

      Goyena Baroja, Harkaitz; Pérez Goya, Unai Upna Orcid; Montesino San Martín, Manuel Upna Orcid; Militino, Ana F. Upna Orcid; Wang, Qunming; Atkinson, Peter M.; Ugarte Martínez, María Dolores Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Spatio-temporal image fusion aims to increase the frequency and resolution of multispectral satellite sensor images in a cost-effective manner. However, practical constraints on input data requirements and computational ...
    • Unsymmetrical basic uncertain information with some decision-making methods 

      Jin, LeSheng; Yager, Ronald R.; Chen, Zhen-Song; Mesiar, Radko; Bustince Sola, Humberto Upna Orcid (IOS Press, 2022)   Artículo / Artikulua  OpenAccess
      Motivated by a specific decision-making situation, this work proposes the concept and definition of unsymmetrical basic uncertain information which is a further generalization of basic uncertain information and can model ...
    • Use of Choquet integrals in multivalued contexts 

      Burusco Juandeaburre, Ana Upna Orcid; Alcalde, Cristina (Springer, 2020)   Artículo / Artikulua  OpenAccess
      In this work, multivalued contexts are studied, in which the different observations are related to each other. Continuing the studies already carried out in previous works, the use of Choquet integrals can be an adequate ...
    • Using mortality to predict incidence for rare and lethal cancers in very small areas 

      Etxeberria Andueza, Jaione Upna Orcid; Goicoa Mangado, Tomás; Ugarte Martínez, María Dolores Upna Orcid (VCH Publishers, 2022)   Artículo / Artikulua  OpenAccess
      Incidence and mortality figures are needed to get a comprehensive overview of cancer burden. In many countries, cancer mortality figures are routinely recorded by statistical offices, whereas incidence depends on regional ...
    • Using publish/subscribe for message routing in mobile environments 

      Amozarrain Pérez, Ugaitz; Larrea, Mikel (Springer, 2023)   Artículo / Artikulua  OpenAccess
      Publish/subscribe is a mature communication paradigm to route and deliver events from publishers to interested subscribers. Initially conceived for large scale systems, e.g., the Internet, it has been used more recently ...
    • Using RGISTools to estimate water levels in reservoirs and lakes 

      Militino, Ana F. Upna Orcid; Montesino San Martín, Manuel Upna Orcid; Pérez Goya, Unai Upna Orcid; Ugarte Martínez, María Dolores Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The combination of freely accessible satellite imagery from multiple programs improves the spatio-temporal coverage of remote sensing data, but it exhibits barriers regarding the variety of web services, file formats, and ...
    • Valorization of agri-food waste through the extraction of bioactive molecules. Prediction of their sunscreen action 

      Martínez Inda, Blanca Upna; Esparza Catalán, Irene Upna; Moler Cuiral, José Antonio Upna Orcid; Jiménez Moreno, Nerea Upna Orcid; Ancín Azpilicueta, Carmen Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The aim of this work was to identify the phenolic composition of 18 different vegetable residues and to determine the relationship between their phenolic compounds, antioxidant capacity and sun protection factor. For ...

      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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