Recent Submissions

  • Uniformly convergent expansions for the generalized hypergeometric functions p –1Fp and pFp 

    López García, José Luis Upna; Pagola Martínez, Pedro Jesús Upna; Karp, D. B. (Taylor & Francis, 2020)   Artículo / Artikulua
    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 ...
  • On the performances of trend and change-point detection methods for remote sensing data 

    Militino, Ana F. Upna; Moradi, Mohammad Mehdi; Ugarte Martínez, María Dolores Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
    Detecting change-points and trends are common tasks in the analysis of remote sensing data. Over the years, many different methods have been proposed for those purposes, including (modified) Mann-Kendall and Cox-Stuart ...
  • Decomposition and arrow-like aggregation of fuzzy preferences 

    Raventós Pujol, Armajac Upna; Campión Arrastia, María Jesús Upna; Induráin Eraso, Esteban Upna (MDPI, 2020)   Artículo / Artikulua  OpenAccess
    We analyze the concept of a fuzzy preference on a set of alternatives, and how it can be decomposed in a triplet of new fuzzy binary relations that represent strict preference, weak preference and indifference. In this ...
  • Analysis of singular one-dimensional linear boundary value problems using two-point Taylor expansions 

    Ferreira González, Chelo Upna; López García, José Luis Upna; Pérez Sinusía, Ester Upna (University of Szeged (Hungría), 2020)   Artículo / Artikulua  OpenAccess
    We consider the second-order linear differential equation (x2 − 1)y'' + f (x)y′ + g(x)y = h(x) in the interval (−1, 1) with initial conditions or boundary conditions (Dirichlet, Neumann or mixed Dirichlet–Neumann). The ...
  • Interval subsethood measures with respect to uncertainty for the interval-valued fuzzy setting 

    Pekala, Barbara; Bentkowska, Urszula; Sesma Sara, Mikel Upna; Fernández Fernández, Francisco Javier Upna; Lafuente López, Julio Upna; Altalhi, A. H.; Knap, Maksymilian; Bustince Sola, Humberto Upna; Pintor Borobia, Jesús María Upna (Atlantis Press, 2020)   Artículo / Artikulua  OpenAccess
    In this paper, the problem of measuring the degree of subsethood in the interval-valued fuzzy setting is addressed. Taking into account the widths of the intervals, two types of interval subsethood measures are proposed. ...
  • Psychosocial adjustment of in-home caregivers of family members with dementia and parkinson's disease: a comparative study 

    Lopes Dos Santos, María Cristina Upna; Navarta Sánchez, María Victoria; Moler Cuiral, José Antonio Upna; García Lautre, Ignacio Upna; Anaut Bravo, Sagrario Upna; Portillo, Mari Carmen (Hindawi, 2020)   Artículo / Artikulua  OpenAccess
    Neurodegenerative diseases such as Parkinson's and dementia are highly prevalent worldwide. People who suffer from these disorders often receive in-home care and assistance from family members, who must dedicate a considerable ...
  • Performance measures in dose-finding experiments 

    Flournoy, Nancy; Moler Cuiral, José Antonio Upna; Plo, Fernando (John Wiley & Sons, 2020)   Artículo / Artikulua  OpenAccess
    In the first phase of pharmaceutical development, and assuming that the probability of positive response increases with dose, the main statistical goal is to estimate a percentile of the dose–response function for a given ...
  • Trend analysis in L-fuzzy contexts with absent values 

    Alcalde, Cristina; Burusco Juandeaburre, Ana Upna; Bustince Sola, Humberto Upna; Sesma Sara, Mikel Upna (University of Sistan and Baluchestan (Irán), 2020)   Artículo / Artikulua  OpenAccess
    Sometimes we have to work with L-fuzzy context sequences where one or more values are missing. These sequences can represent, among other things, the evolution in time of an L-fuzzy context. The studies of tendencies that ...
  • On admissible orders over closed subintervals of [0,1] 

    Santana, Fagner; Bedregal, Benjamin; Viana, Petrucio; Bustince Sola, Humberto Upna (Elsevier, 2020)   Artículo / Artikulua
    In this paper, we make some considerations about admissible orders on the set of closed subintervals of the unit interval I[0,1], i.e. linear orders that refine the product order on intervals. We propose a new way to ...
  • Affine construction methodology of aggregation functions 

    Roldán López de Hierro, Antonio F.; Roldán, Concepción; Bustince Sola, Humberto Upna; Fernández Fernández, Francisco Javier Upna; Rodríguez Martínez, Iosu; Fardoun, Habib; Lafuente López, Julio Upna (Elsevier, 2020)   Artículo / Artikulua
    Aggregation functions have attracted much attention in recent times because of its potential use in many areas such us data fusion and decision making. In practice, most of the aggregation functions that scientists use in ...
  • Coping with stress in emergency department physicians through improved patient-flow management 

    Cildoz Esquíroz, Marta Upna; Ibarra, Amaia; Mallor Giménez, Fermín Upna (Elsevier, 2020)   Artículo / Artikulua  OpenAccess
    This paper provides a method for the real-time monitoring of job stress in emergency department (ED) physicians. It is implemented in a Decision Support System (DSS) designed for patient-to-physician assignment after triage. ...
  • Bayesian inference in multivariate spatio-temporal areal models using INLA: analysis of gender-based violence in small areas 

    Vicente, G.; Goicoa Mangado, Tomás Upna; Ugarte Martínez, María Dolores Upna (Springer, 2020)   Artículo / Artikulua  OpenAccess
    Multivariate models for spatial count data are currently receiving attention in disease mapping to model two or more diseases jointly. They have been thoroughly studied from a theoretical point of view, but their use in ...
  • d-Choquet integrals: Choquet integrals based on dissimilarities 

    Bustince Sola, Humberto Upna; Mesiar, Radko; Fernández Fernández, Francisco Javier Upna; Galar Idoate, Mikel Upna; Paternain Dallo, Daniel Upna; Altalhi, A. H.; Pereira Dimuro, Graçaliz Upna; Bedregal, Benjamin; Takáč, Zdenko (Elsevier, 2020)   Artículo / Artikulua
    The paper introduces a new class of functions from [0,1]n to [0,n] called d-Choquet integrals. These functions are a generalization of the 'standard' Choquet integral obtained by replacing the difference in the definition ...
  • Reeb’s theorem and periodic orbits for a rotating Hénon–Heiles potential 

    Lanchares, Víctor; Pascual, Ana Isabel; Iñarreta, Manuel; Salas, José Pablo; Palacián Subiela, Jesús Francisco Upna; Yanguas Sayas, Patricia Upna (Springer, 2019)   Artículo / Artikulua
    We apply Reeb’s theorem to prove the existence of periodic orbits in the rotating Hénon– Heiles system. To this end, a sort of detuned normal form is calculated that yields a reduced system with at most four non degenerate ...
  • On some classes of directionally monotone functions 

    Bustince Sola, Humberto Upna; Mesiar, Radko; Kolesárová, Anna; Pereira Dimuro, Graçaliz Upna; Fernández Fernández, Francisco Javier Upna; Díaz, Irene; Montes, S. (Elsevier, 2020)   Artículo / Artikulua
    In this work we consider some classes of functions with relaxed monotonicity conditions generalizing some other given classes of fusion functions. In particular, directionally increasing aggregation functions (called also ...
  • Numerical and experimental investigation of the stability of a drop in a single-axis acoustic levitator 

    Andrade, Marco Aurélio Brizzotti; Marzo Pérez, Asier Upna (American Institute of Physics, 2019)   Artículo / Artikulua
    Acoustic levitation can be employed to hold liquid drops in midair, enabling novel applications in X-ray scattering of proteins, amorphous crystallization of solutions, or contactless mixing. Multiple studies have characterized ...
  • Mixed-dimensional geometric multigrid methods for single-phase flow in fractured porous media 

    Arrarás Ventura, Andrés; Gaspar, F. J.; Portero Egea, Laura Upna; Rodrigo, C. (SIAM, 2019)   Artículo / Artikulua  OpenAccess
    This paper deals with the efficient numerical solution of single-phase flow problems in fractured porous media. A monolithic multigrid method is proposed for solving two-dimensional arbitrary fracture networks with vertical ...
  • Topologies for semicontinuous Richter–Peleg multi-utilities 

    Bosi, Gianni; Estevan Muguerza, Asier Upna; Raventós Pujol, Armajac Upna (Springer, 2020)   Artículo / Artikulua
    The present paper gives a topological solution to representability problems related to multi-utility, in the field of Decision Theory. Necessary and sufficient topologies for the existence of a semicontinuous and finite ...
  • Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation 

    Andrade, Marco Aurélio Brizzotti; Ramos, Tiago S.; Adamowski, Julio C.; Marzo Pérez, Asier Upna (American Institute of Physics, 2020)   Artículo / Artikulua
    We model and realize an ultrasonic contactless pick-and-place device capable of picking, self-centering, self-orienting, translating, and releasing flat millimetric objects. The device is an ultrasonic Langevin transducer ...
  • Orness for real m-dimensional interval-valued OWA operators and its application to determine a good partition 

    Miguel Turullols, Laura de Upna; Paternain Dallo, Daniel Upna; Lizasoain Iriso, María Inmaculada Upna; Ochoa Lezaun, Gustavo Upna; Bustince Sola, Humberto Upna (Taylor & Francis, 2019)   Artículo / Artikulua
    Ordered Weighted Averaging (OWA) operators are a profusely applied class of averaging aggregation functions, i.e. operators that always yield a value between the minimum and the maximum of the inputs. The orness measure ...

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