Now showing items 1-20 of 251

    • 119Sn Mössbauer spectroscopy for assessing the local stress and defect state towards the tuning of Ni-Mn-Sn alloys 

      Unzueta, Iraultza; López García, Javier Upna; Sánchez-Alarcos Gómez, Vicente Upna Orcid; Recarte Callado, Vicente Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid (AIP Publishing, 2017)   Artículo / Artikulua  OpenAccess
      The influence of defects and local stresses on the magnetic properties and martensitic transformation in Ni50Mn35Sn15 is studied at macroscopic and atomic scale levels. We show that both the structural and magnetic properties ...
    • Acoustic and psychoacoustic levels from an internal combustion engine fueled by hydrogen vs. gasoline 

      Arana Burgui, Miguel Upna Orcid; San Martín Murugarren, Ricardo Upna Orcid; Urroz Unzueta, José Carlos Upna Orcid; Diéguez Elizondo, Pedro; Gandía Pascual, Luis Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Whereas noise generated by road traffic is an important factor in urban pollution, little attention has been paid to this issue in the field of hydrogen-fueled vehicles. The objective of this study is to analyze the influence ...
    • Adsorption of rhodamine 6G and humic acids on composite bentonite-alginate in single and binary systems 

      Gomri, Fatima; Finqueneisel, Gisele; Zimny, Thierry; Korili, Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid; Boutahala, Mokhtar (Springer, 2018)   Artículo / Artikulua  OpenAccess
      In this work, the preparation, characterization, and sorption of rhodamine 6G and humic acids on a composite sodium alginate-bentonite were investigated. Their structure and morphology were analyzed by several techniques, ...
    • Adsorption recovery of Ag(I) and Au(III) from an electronics industry wastewater on a clay mineral composite 

      Rakhila, Youness; Elmchaouri, Abdellah; Mestari, Allal; Korili, Sophia A. Upna Orcid; Abouri, Meriem; Gil Bravo, Antonio Upna Orcid (University of Science and Technology BeijingSpringer, 2019)   Artículo / Artikulua  OpenAccess
      The aim of this work is to investigate the ability of an adsorbent of a clay mineral composite to remove and recover gold and silver ions from wastewater. The composite was prepared by mixing phosphogypsum (PG), obtained ...
    • Aggregation of individual rankings through fusion functions: criticism and optimality analysis 

      Bustince Sola, Humberto Upna Orcid; Bedregal, Benjamin Upna Orcid; Campión Arrastia, María Jesús Upna Orcid; Silva, Ivanoska da; Fernández Fernández, Francisco Javier Upna Orcid; Induráin Eraso, Esteban Upna Orcid; Raventós Pujol, Armajac Upna Orcid; Santiago, Regivan (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Throughout this paper, our main idea is to analyze from a theoretical and normative point of view different methods to aggregate individual rankings. To do so, first we introduce the concept of a general mean on an abstract ...
    • Alleviating confounding in spatio-temporal areal models with an application on crimes against women in India 

      Adin Urtasun, Aritz Upna Orcid; Goicoa Mangado, Tomás Upna Orcid; Hodges, James S.; Schnell, Patrick M.; Ugarte Martínez, María Dolores Upna Orcid (SAGE Publications, 2021)   Artículo / Artikulua  OpenAccess
      Assessing associations between a response of interest and a set of covariates in spatial areal models is the leitmotiv of ecological regression. However, the presence of spatially correlated random effects can mask or even ...
    • Alternative thermal cycling treatment to produce abnormal grain growth in feMnAlNi alloys: study of composition variations and effects on the relative phase stabilities 

      La Roca, Paulo Matías Upna; Guerrero, L.M.; Baruj, A.; Vallejos, J. M.; Sade, M. (Springer, 2021)   Artículo / Artikulua  OpenAccess
      An alternative method to obtain abnormal grain growth in Fe–Mn–Al–Ni system is presented. A crucible is used to control the cooling speed of the samples from 1200 °C enabling the nucleation of the equilibrium fcc phase. ...
    • Analysis and application of an overlapped FEM-BEM for wave propagation in unbounded and heterogeneous media 

      Domínguez Baguena, Víctor Upna Orcid; Ganesh, M. (Elsevier, 2022)   Artículo / Artikulua
      An overlapped continuous model framework, for the Helmholtz wave propagation problem in unbounded regions comprising bounded heterogeneous media, was recently introduced and analyzed by the authors (2020) [10]. The continuous ...
    • Analysis of singular one-dimensional linear boundary value problems using two-point Taylor expansions 

      Ferreira González, Chelo Upna; López García, José Luis Upna Orcid; Pérez Sinusía, Ester Upna Orcid (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 ...
    • Analysis of the strain misfit between matrix and inclusions in a magnetically tunable composite 

      Bonifacich, Federico Guillermo; Lambri, Osvaldo Agustín; Lambri, Fernando Daniel; Bozzano, P. B.; Recarte Callado, Vicente Upna Orcid; Sánchez-Alarcos Gómez, Vicente Upna Orcid; Pérez-Landazábal, José Ignacio Upna Orcid (Elsevier, 2021)   Artículo / Artikulua
      A magnetically tunable composite has been elaborated by embedding microparticles of a metamagnetic shape memory alloy on a photo curable resin. The strain misfit between the polymeric matrix and the inclusions has been ...
    • Antibacterial functionalization of PVD coatings on ceramics 

      Osés Martínez de Zúñiga, Javier Upna Orcid; García Fuentes, Gonzalo Upna Orcid; Fernández Palacio, José; García Lorente, José Antonio Upna Orcid; Rodríguez Trías, Rafael Upna Orcid (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      The application of surface treatments that incorporate silver or copper as antibacterial elements has become a common practice for a wide variety of medical devices and materials because of their effective activity against ...
    • Application of a modeling tool to describe fly ash generation, composition, and melting behavior in a wheat straw fired commercial power plant 

      Funcia, Ibai; Bimbela Serrano, Fernando Upna Orcid; Gil, Javier; Gandía Pascual, Luis Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Ash behavior is a key operational aspect of industrial-scale power generation by means of biomass combustion. In this work, FactSage™ 6.4 software was used to develop and assess three models of wheat straw combustion in a ...
    • Application of eco-design and life cycle assessment standards for environmental impact reduction of an industrial product 

      Navajas León, Alberto Upna Orcid; Uriarte Elizaga, Leire; Gandía Pascual, Luis Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Eco-design is included within the framework of the standard for “Environmental management systems—Guidelines for incorporating Eco-design” (ISO 14006:2011). Eco-design process, as defined in standard, has six steps: (i) ...
    • Application of industrial wastes from chemically treated aluminum saline slags as adsorbents 

      Gil Bravo, Antonio Upna Orcid; Arrieta Chango, Ekhine Upna; Vicente, Miguel Ángel; Korili, Sophia A. Upna Orcid (American Chemical Society, 2018)   Artículo / Artikulua  OpenAccess
      In this study, industrial wastes, which remain after aluminum extraction from saline slags, were used as adsorbents. The aluminum saline slags were treated under reflux with 2 mol/dm3 aqueous solutions of NaOH, H2SO4, and ...
    • Assigning numerical scores to linguistic expressions 

      Campión Arrastia, María Jesús Upna Orcid; Falcó Díaz de Cerio, Edurne Upna; García Lapresta, José; Induráin Eraso, Esteban Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      In this paper, we study different methods of scoring linguistic expressions defined on a finite set, in the search for a linear order that ranks all those possible expressions. Among them, particular attention is paid to ...
    • Asymptotic greediness of the Haar system in the spaces Lp[0 , 1] , 1< p< ∞ 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L.; Berná, Pablo M. (Springer, 2019)   Artículo / Artikulua  OpenAccess
      Our aim in this paper is to attain a sharp asymptotic estimate for the greedy constant Cg[H(p), Lp] of the (normalized) Haar system H(p) in Lp[0 , 1] for 1 < p < ∞. We will show that the super-democracy constant of H(p) ...
    • An axiomatic approach to finite means 

      Campión Arrastia, María Jesús Upna Orcid; Candeal, Juan Carlos; García Catalán, Olga Raquel Upna; Giarlotta, Alfio; Induráin Eraso, Esteban Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      In this paper we analyze the notion of a finite mean from an axiomatic point of view. We discuss several axiomatic alternatives, with the aim of establishing a universal definition reconciling all of them and exploring ...
    • Bayesian inference in multivariate spatio-temporal areal models using INLA: analysis of gender-based violence in small areas 

      Vicente Fuenzalida, Gonzalo; Goicoa Mangado, Tomás Upna Orcid; Ugarte Martínez, María Dolores Upna Orcid (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 ...
    • Binary relations coming from solutions of functional equations: orderings and fuzzy subsets 

      Campión Arrastia, María Jesús Upna Orcid; Miguel Turullols, Laura de Upna Orcid; García Catalán, Olga Raquel Upna; Induráin Eraso, Esteban Upna Orcid; 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 ...
    • Bright fireballs recorded along February 2021 in the framework of 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 (MeteorNews, 2021)   Artículo / Artikulua  OpenAccess
      This work focuses on the analysis of some of the brightest bolides recorded along February 2021 by the meteorobserving stations operating in the framework of the Southwestern Europe Meteor Network (SWEMN). Some of them ...