Now showing items 1-20 of 27

    • A large scale screening study with a SMR-based BCI: Categorization of BCI users and differences in their SMR activity 

      Sannelli, Claudia; Vidaurre, Carmen; Müller, Klaus Robert; Blankertz, Benjamin (Plos one, 2019)   Artículo / Artikulua  OpenAccess
      Brain-Computer Interfaces (BCIs) are inefficient for a non-negligible part of the population, estimated around 25%. To understand this phenomenon in Sensorimotor Rhythm (SMR) based BCIs, data from a large-scale screening ...
    • Weightable quasi-metrics related to fuzzy sets 

      Campión Arrastia, María Jesús Upna; García Catalán, Olga Raquel Upna; Induráin Eraso, Esteban Upna; Valero, Óscar (Hacettepe University (Turquía), 2018)   Artículo / Artikulua  OpenAccess
      We show that the definition of a fuzzy set is directly related to the existence of a weightable quasi-metric on a universe. This relationship is also explored in terms of functional equations coming either from the membership ...
    • Desarrollo de la competencia de análisis ontosemiótico de futuros profesores de matemáticas 

      Giacomone, Belén; Godino, Juan D.; Wilhelmi, Miguel R. Upna; Blanco, Teresa F. (Universidad Complutense de Madrid, 2018)   Artículo / Artikulua  OpenAccess
      Una enseñanza adecuada de las matemáticas requiere el conocimiento y la competencia de los profesores para identificar la variedad de objetos y significados involucrados en la resolución de tareas escolares. En este ...
    • Orness for idempotent aggregation functions 

      Legarreta, Leire; Lizasoain Iriso, María Inmaculada Upna; Mardones Pérez, Iraide (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Aggregation functions are mathematical operators that merge given data in order to obtain a global value that preserves the information given by the data as much as possible. In most practical applications, this value is ...
    • Some characterizations of lattice OWA operators 

      Miguel Turullols, Laura de Upna; Paternain Dallo, Daniel Upna; Lizasoain Iriso, María Inmaculada Upna; Ochoa Lezaun, Gustavo Upna; Bustince Sola, Humberto Upna (World Scientific Publishing Company, 2017)   Artículo / Artikulua  OpenAccess
      Ordered Weighted Averaging (OWA) operators are a family of aggregation which fusion data. If the data are real numbers, then OWA operators can be characterized either as an special kind of Choquet integral or simply as ...
    • Binary relations coming from solutions of functional equations: orderings and fuzzy subsets 

      Campión Arrastia, María Jesús Upna; Miguel Turullols, Laura de Upna; García Catalán, Olga Raquel Upna; Induráin Eraso, Esteban Upna; Abrísqueta Usaola, Francisco Javier Upna (World Scientific Publishing Company, 2017)   Artículo / Artikulua  OpenAccess
      We analyze the main properties of binary relations, defined on a nonempty set, that arise in a natural way when dealing with real-valued functions that satisfy certain classical functional equations on two variables. We ...
    • Pointwise aggregation of maps: its structural functional equation and some applications to social choice theory 

      Miguel Turullols, Laura de Upna; Campión Arrastia, María Jesús Upna; Candeal, Juan Carlos; Induráin Eraso, Esteban Upna; Paternain Dallo, Daniel Upna (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      We study a structural functional equation that is directly related to the pointwise aggregation of a finite number of maps from a given nonempty set into another. First we establish links between pointwise aggregation and ...
    • An algorithm for group decision making using n -dimensional fuzzy sets, admissible orders and OWA operators 

      Miguel Turullols, Laura de Upna; Sesma Sara, Mikel Upna; Elkano Ilintxeta, Mikel Upna; Asiain Ollo, María José Upna; Bustince Sola, Humberto Upna (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      In this paper we propose an algorithm to solve group decision making problems using n -dimensional fuzzy sets, namely, sets in which the membership degree of each element to the set is given by an in- creasing tuple of n ...
    • Normas epistémicas en la formación musical del maestro de educación primaria 

      Belletich Ruiz, Olga Upna; Ángel Alvarado, Rolando Alfredo; Wilhelmi, Miguel R. Upna (Universidad de Granada, 2017)   Artículo / Artikulua  OpenAccess
      En España, la actual reforma educativa está forzando a las universidades a ajustar la formación inicial docente porque el nuevo sistema escolar orienta el currículo hacia la formación por competencias. Esta investigación ...
    • Interval-valued Atanassov intuitionistic OWA aggregations using admissible linear orders and their application to decision making 

      Miguel Turullols, Laura de Upna; Bustince Sola, Humberto Upna; Pekala, Barbara; Bentkowska, Urszula; Silva, Ivanoska da; Bedregal, Benjamin; Mesiar, Radko; Ochoa Lezaun, Gustavo Upna (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      Based on the definition of admissible order for interval-valued Atanassov intuitionistic fuzzy sets, we study OWA operators in these sets distinguishing between the weights associated to the membership and those associated ...
    • La educación musical en la formación básica en España. El problema de la dispersión curricular 

      Belletich Ruiz, Olga Upna; Wilhelmi, Miguel R. Upna; Ángel Alvarado, Rolando Alfredo (Pontificia Universidad Católica de Valparaíso, 2016)   Artículo / Artikulua  OpenAccess
      En España la Educación Artística pierde su carácter obligatorio en Educación Primaria con la entrada en vigencia de la Ley Orgánica para la Mejora de la Calidad Educativa [LOMCE], relegando la decisión curricular a ...
    • Comparison meaningful operators and ordinal invariant preferences 

      Candeal, Juan Carlos; Induráin Eraso, Esteban Upna (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      The existence of a continuous and order-preserving real-valued function, for the class of continuous and ordinal invariant total preorders, defined on the Banach space of all bounded real-valued functions, which are in ...
    • Frailty assessment based on trunk kinematic parameters during walking 

      Martínez Ramírez, Alicia Upna; Martinikorena Aranburu, Ion Upna; Gómez Fernández, Marisol Upna; Lecumberri Villamediana, Pablo Upna; Millor Muruzábal, Nora Upna; Rodríguez Mañas, Leocadio; García García, Francisco José; Izquierdo Redín, Mikel Upna (BioMed Central, 2015)   Artículo / Artikulua  OpenAccess
      Background: Physical frailty has become the center of attention of basic, clinical and demographic research due to its incidence level and gravity of adverse outcomes with age. Frailty syndrome is estimated to affect 20 % ...
    • Construction of admissible linear orders for interval-valued Atanassov intuitionistic fuzzy sets with an application to decision making 

      Miguel Turullols, Laura de Upna; Bustince Sola, Humberto Upna; Fernández Fernández, Francisco Javier Upna; Induráin Eraso, Esteban Upna; Kolesárová, Anna; Mesiar, Radko (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      In this work we introduce a method for constructing linear orders between pairs of intervals by using aggregation functions. We adapt this method to the case of interval-valued Atanassov intuitionistic fuzzy sets and we ...
    • Niveles de algebrización de las prácticas matemáticas escolares. Articulación de las perspectivas ontosemiótica y antropológica 

      Godino, Juan D.; Neto, T.; Wilhelmi, Miguel R. Upna; Aké, Lilia P.; Etchegaray, S.; Lasa Oyarbide, Aitzol Upna (Sociedad Española de Investigación en Educación Matemática (SEIEM), 2015)   Artículo / Artikulua  OpenAccess
      En el marco del enfoque ontosemiótico del conocimiento y la instrucción matemáticos se ha propuesto una caracterización del razonamiento algebraico en Educación Primaria basada en la distinción de tres niveles de ...
    • Assessment of asymmetric leg loading before and after total hip arthroplasty using instrumented shoes 

      Martínez Ramírez, Alicia Upna; Weenk, Dirk; Lecumberri Villamediana, Pablo Upna; Verdonschot, Nico; Pakvis, Dean; Veltink, Peter H. (BioMed Central, 2014)   Artículo / Artikulua  OpenAccess
      Background: Total hip arthroplasty is a successful surgical treatment in patients with osteoarthritis of the hip. Different questionnaires are used by the clinicians to assess functional capacity and the patient's pain, ...
    • Pre-operative ambulatory measurement of asymmetric lower limb loading during walking in total hip arthroplasty patients 

      Martínez Ramírez, Alicia Upna; Weenk, Dirk; Lecumberri Villamediana, Pablo Upna; Verdonschot, Nico; Pakvis, Dean; Veltink, Peter H. (BioMed Central, 2013)   Artículo / Artikulua  OpenAccess
      Background: Total hip arthroplasty is a successful surgical procedure to treat hip osteoarthritis. Clinicians use different questionnaires to assess the patient’s pain and functional capacity. Furthermore, they assess the ...
    • An evaluation of the 30-s chair stand test in older adults: frailty detection based on kinematic parameters from a single inertial unit 

      Millor Muruzábal, Nora Upna; Lecumberri Villamediana, Pablo Upna; Gómez Fernández, Marisol Upna; Martínez Ramírez, Alicia Upna; Izquierdo Redín, Mikel Upna (BioMed Central, 2013)   Artículo / Artikulua  OpenAccess
      Background: A growing interest in frailty syndrome exists because it is regarded as a major predictor of co-morbidities and mortality in older populations. Nevertheless, frailty assessment has been controversial, particularly ...
    • Naturaleza del razonamiento algebraico elemental 

      Godino, Juan D.; Castro, Walter F.; Aké, Lilia P.; Wilhelmi, Miguel R. Upna (UNESP, 2012)   Artículo / Artikulua  OpenAccess
      La introducción del razonamiento algebraico en educación primaria es un tema de interés para la investigación e innovación curricular en didáctica de las matemáticas, y presupone una visión ampliada de la naturaleza del ...
    • Distribution patterns of infection with multiple types of human papillomaviruses and their association with risk factors 

      Soto de León, Sara; Camargo, Milena; Sánchez, Ricardo; Muñoz, Marina Upna; Pérez Prados, Antonio Upna; Purroy Unanua, Antonio Upna; Patarroyo, Manuel Elkin; Patarroyo, Manuel Alfonso (Public Library of Science, 2011)   Artículo / Artikulua  OpenAccess
      Background: Infection with multiple types of human papillomavirus (HPV) is one of the main risk factors associated with the development of cervical lesions. In this study, cervical samples collected from 1, 810 women with ...