Now showing items 99-118 of 135

    • Papel de las situaciones adidácticas en el aprendizaje matemático. Una mirada crítica desde el enfoque ontosemiótico 

      Godino, Juan D.; Burgos, María; Wilhelmi, Miguel R. Upna Orcid (Universitat Autònoma de BarcelonaUniversitat de València, 2020)   Artículo / Artikulua  OpenAccess
      El postulado del aprendizaje por adaptación a un medio antagonista asumido por la teoría de situaciones didácticas en matemáticas se corresponde con el papel central que esta teoría atribuye a las situaciones adidácticas ...
    • Partial representations of orderings 

      Bosi, Gianni; Estevan Muguerza, Asier Upna Orcid; Zuanon, Magali (World Scientific, 2018)   Artículo / Artikulua  OpenAccess
      In the present paper a new concept of representability is introduced, which can be applied to not total and also to intransitive relations (semiorders in particular). This idea tries to represent the orderings in the ...
    • Performance measures in dose-finding experiments 

      Flournoy, Nancy; Moler Cuiral, José Antonio Upna Orcid; 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 ...
    • Periodic solutions, KAM tori and bifurcations in a cosmology-inspired potential 

      Palacián Subiela, Jesús Francisco Upna Orcid; Vidal Díaz, Claudio; Vidarte, Jhon; Yanguas Sayas, Patricia Upna Orcid (IOP Publishing, 2019)   Artículo / Artikulua  OpenAccess
      A family of perturbed Hamiltonians H = 1/2 (x^2 + X^2) − 1/2 (y^2 + Y^2)+1/2 (z^2 + Z^2) + 2[ (x^4 + y^4 + z^4) + (x^2 y^2 + x^2 z^2 + y^2 z^2)] in 1: −1:1 resonance depending on two real parameters is considered. We ...
    • Pinus spp. somatic embryo conversion under high temperature: effect on the morphological and physiological characteristics of plantlets 

      Marqués do Nascimento, Antonia Maiara; Barroso, Priscila Alves; Ferreira do Nascimento, Naysa Flavia; Goicoa Mangado, Tomás; Ugarte Martínez, María Dolores; Montalbán, Itziar A.; Moncaleán, Paloma (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Climatic variations in the current environmental scenario require plants with tolerance to sudden changes in temperature and a decrease in water availability. Accordingly, this tolerance will enable successful plantations ...
    • The problem of the last bed: contextualization and a new simulation framework for analyzing physician decisions 

      Azcárate Camio, Cristina Upna Orcid; Esparza, Laida; Mallor Giménez, Fermín Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Faced with a full Intensive Care Unit (ICU), physicians need to decide between turning away a new patient in need of critical care and creating a vacancy by prematurely discharging a current occupant. This dilemma is widely ...
    • A proposal for tuning the α parameter in CαC-integrals for application in fuzzy rule-based classification systems 

      Lucca, Giancarlo; Sanz Delgado, José Antonio Upna Orcid; Pereira Dimuro, Graçaliz Upna Orcid; Bedregal, Benjamin Upna; Bustince Sola, Humberto Upna Orcid (Springer, 2020)   Artículo / Artikulua  OpenAccess
      In this paper, we consider the concept of extended Choquet integral generalized by a copula, called CC-integral. In particular, we adopt a CC-integral that uses a copula defined by a parameter α, which behavior was tested ...
    • Psychosocial adjustment of in-home caregivers of family members with dementia and parkinson's disease: a comparative study 

      Lopes Dos Santos, María Cristina Upna Orcid; Navarta Sánchez, María Victoria; Moler Cuiral, José Antonio Upna Orcid; García Lautre, Ignacio Upna Orcid; Anaut Bravo, Sagrario Upna Orcid; Portillo Vega, María 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 ...
    • Real elements and p-nilpotence of finite groups 

      Ballester Bolinches, Adolfo; Esteban Romero, Ramón; Ezquerro Marín, Luis Miguel Upna Orcid (Aracne, 2016)   Artículo / Artikulua  OpenAccess
      Our first main result proves that every element of order 4 of a Sylow 2-subgroup S of a minimal non-2-nilpotent group G, is a real element of S. This allows to give a character-free proof of a theorem due to Isaacs and ...
    • Reducing SO₂ doses in red wines by using grape stem extracts as antioxidants 

      Esparza Catalán, Irene Upna; Martínez Inda, Blanca; Cimminelli, María José Upna; Moler Cuiral, José Antonio Upna Orcid; Jiménez Moreno, Nerea Upna Orcid; Ancín Azpilicueta, Carmen Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      SO₂ is a very important wine preservative. However, there are several drawbacks associated with the use of SO₂ in wine. The aim of this work is to evaluate the effect of the partial substitution of SO₂ in the Tempranillo ...
    • Reduction of the size of L-fuzzy contexts. A tool for differential diagnoses of diseases 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid (Taylor & Francis, 2019)   Artículo / Artikulua  OpenAccess
      Information extraction from an L-fuzzy context becomes a hard problem when we work with a large set of objects and/or attributes. The goal of this paper is to present two different and complementary techniques to reduce ...
    • Reeb’s theorem and periodic orbits for a rotating Hénon–Heiles potential 

      Lanchares, Víctor; Pascual, Ana Isabel; Iñarrea, Manuel; Salas, José Pablo; Palacián Subiela, Jesús Francisco Upna Orcid; Yanguas Sayas, Patricia Upna Orcid (Springer, 2019)   Artículo / Artikulua  OpenAccess
      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 ...
    • Relevance of sex, age and gait kinematics when predicting fall-risk and mortality in older adults 

      Porta Cuéllar, Sonia Upna Orcid; Martínez Ramírez, Alicia Upna Orcid; Millor Muruzábal, Nora Upna Orcid; Gómez Fernández, Marisol Upna Orcid; Izquierdo Redín, Mikel Upna Orcid (Elsevier, 2020)   Artículo / Artikulua
      Approximately one-third of elderly people fall each year with severe consequences, including death. The aim of this study was to identify the most relevant features to be considered to maximize the accuracy of a logistic ...
    • Scale recoding in sociological research: a new validation methodology. An application to a political survey 

      Abascal Fernández, Elena Upna Orcid; Díaz de Rada Igúzquiza, Vidal Upna Orcid; García Lautre, Ignacio Upna Orcid; Landaluce, M. Isabel (CSIC, 2019)   Artículo / Artikulua  OpenAccess
      La recodificación de variables es una etapa habitual en el análisis de datos de encuesta. No está exenta de riesgos, como pueden ser la introducción de sesgos o las posibles deformaciones de los datos originales. En este ...
    • Sensorimotor functional connectivity: a neurophysiological factor related to BCI performance 

      Vidaurre, Carmen Upna Orcid; Haufe, Stefan; Jorajuría, Tania; Müller, Klaus Robert; Nikulin, Vadim V. (Frontiers Media, 2020)   Artículo / Artikulua  OpenAccess
      Brain-computer interfaces (BCIs) are systems that allow users to control devices using brain activity alone. However, the ability of participants to command BCIs varies from subject to subject. About 20% of potential users ...
    • Short- and mid-term evaluation of the use of electric vehicles in urban freight transport collaborative networks: a case study 

      Muñoz Villamizar, Andrés; Quintero Araújo, Carlos L.; Montoya Torres, Jairo R.; Faulín Fajardo, Javier Upna Orcid (Taylor & Francis, 2019)   Artículo / Artikulua  OpenAccess
      Despite its negative impacts, freight transportation is a primary component of all supply chains. Decision makers have considered diverse strategies, such as Horizontal Collaboration (HC) and the usage of alternative types ...
    • Similarity between interval-valued fuzzy sets taking into account the width of the intervals and admissible orders 

      Bustince Sola, Humberto Upna Orcid; Marco Detchart, Cedric Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Wagner, C.; Garibaldi, J. M. (Elsevier, 2020)   Artículo / Artikulua
      In this work we study a new class of similarity measures between interval-valued fuzzy sets. The novelty of our approach lays, firstly, on the fact that we develop all the notions with respect to total orders of intervals; ...
    • Some preference involved aggregation models for basic uncertain information using uncertainty transformation 

      Yang, RouJian; Jin, LeSheng; Paternain Dallo, Daniel Upna Orcid; Yager, Ronald R.; Bustince Sola, Humberto Upna Orcid (IOS Press, 2020)   Artículo / Artikulua  OpenAccess
      In decision making, very often the data collected are with different extents of uncertainty. The recently introduced concept, Basic Uncertain Information (BUI), serves as one ideal information representation to well model ...
    • Space-time analysis of ovarian cancer mortality rates by age groups in Spanish provinces (1989-2015) 

      Trandafir, Paula Camelia Upna Orcid; Adin Urtasun, Aritz Upna Orcid; Ugarte Martínez, María Dolores Upna Orcid (BioMed Central, 2020)   Artículo / Artikulua  OpenAccess
      Background: Ovarian cancer is a silent and largely asymptomatic cancer, leading to late diagnosis and worse prognosis. The late-stage detection and low survival rates, makes the study of the space-time evolution of ovarian ...
    • Stability of phenolic compounds in grape stem extracts 

      Esparza Catalán, Irene Upna; Cimminelli, María José Upna; Moler Cuiral, José Antonio Upna Orcid; Jiménez Moreno, Nerea Upna Orcid; Ancín Azpilicueta, Carmen Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Grape stem is rich in phenolic compounds, especially stilbenes. These antioxidants can be degraded during the storage of grape stem extracts for long periods of time. The aim of this work was to analyze the stability of ...