Now showing items 1-20 of 170

    • 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 ...
    • 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; 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; 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 ...
    • 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 ...
    • 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; 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 (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, G.; 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 ...
    • Catalytic performance of bulk and Al₂O₃-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content 

      Navajas León, Alberto Upna Orcid; Reyero Zaragoza, Inés Upna Orcid; Jiménez Barrera, Elena; Romero Sarria, Francisca; Llorca Piqué, Jordi; Gandía Pascual, Luis Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Non-edible vegetable oils are characterized by high contents of free fatty acids (FFAs) that prevent from using the conventional basic catalysts for the production of biodiesel. In this work, solid acid catalysts are used ...
    • Characterization of two iron bullets from the royal ammunition factory of Eugi (Spain) 

      Zalakain Iriazabal, Iñaki Upna Orcid; Berlanga Labari, Carlos Upna Orcid; Álvarez Vega, Lucas Upna; Rivero Fuente, Pedro J. Upna Orcid; Valencia Monreal, Javier Upna; Rodríguez Trías, Rafael Upna Orcid (Technical Faculty, University of Belgrade, 2018)   Artículo / Artikulua  OpenAccess
      In this work, a comparative analysis of two iron bullets found in The Royal Ammunition Factory of Eugi in Navarra (Spain) was performed. Both bullets presented a spherical shape with a relatively good state of preservation, ...
    • Checking unimodality using isotonic regression: an application to breast cancer mortality rates 

      Rueda, C.; Ugarte Martínez, María Dolores Upna Orcid; Militino, Ana F. Upna Orcid (Springer, 2016)   Artículo / Artikulua  OpenAccess
      In some diseases it is well-known that a unimodal mortality pattern exists. A clear example in developed countries is breast cancer, where mortality increased sharply until the nineties and then decreased. This clear ...
    • Chemical and mechanical stability of air annealed cathodic arc evaporated CrAlON coatings 

      Almandoz Sánchez, Eluxka Upna Orcid; Fuentes, Gonzalo G.; Fernández Palacio, José; Martínez de Bujanda Carasusán, Javier; Rodríguez Trías, Rafael Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      This study reports the synthesis and characterization of ternary Cr-Al-O and quaternary Cr-Al-O-N coatings deposited by cathodic arc physical vapour deposition, for various nitrogen and oxygen mass flow ratios during the ...
    • CIELAB color paths during meat shelf life 

      Hernández Salueña, Begoña Upna Orcid; Sáenz Gamasa, Carlos Upna Orcid; Diñeiro Rubial, José Manuel Upna Orcid; Alberdi Odriozola, Coro Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Meat color evolution from freshly cut to beyond shelf life, up to 40% of metmyoglobin, has been theoretically modeled using the Kubelka-Munk theory and a set of measured reference reflectance spectra of deoxymyoglobin, ...
    • A combination of a vibrational electromagnetic energy harvester and a giant magnetoimpedance (GMI) sensor 

      Beato López, Juan Jesús Upna Orcid; Royo, Isaac Upna Orcid; Algueta-Miguel, Jose M. Upna Orcid; Gómez Polo, Cristina Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      An energy harvesting device combined with a giant magnetoimpedance (GMI) sensor is presented to analyze low frequency vibrating systems. An electromagnetic harvester based on magnetic levitation is proposed for the electric ...
    • A combination of Rosa canina extracts and gold complex favors apoptosis of Caco-2 cells by increasing oxidative stress and mitochondrial dysfunction 

      Mármol, Inés; Jiménez Moreno, Nerea Upna Orcid; Ancín Azpilicueta, Carmen Upna Orcid; Osada, Jesús; Cerrada, Elena; Rodríguez Yoldi, María Jesús (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Given the alarming increase in colorectal cancer (CRC) worldwide, novel therapies are urgently needed. Plant-derived extracts have gained considerable interest in the last years due to their strong anticancer effect mediated ...