Now showing items 1-20 of 436

    • 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 ...
    • The 3D-printing fabrication of multichannel silicone microreactors for catalytic applications 

      Ibáñez de Garayo Quilchano, Alejandro; Imizcoz Aramburu, Mikel; Maisterra Udi, Maitane Upna; Almazán, Fernando; Sanz Carrillo, Diego; Bimbela Serrano, Fernando Upna Orcid; Cornejo Ibergallartu, Alfonso Upna Orcid; Pellejero, Ismael Upna Orcid; Gandía Pascual, Luis Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      Microstructured reactors (MSRs) are especially indicated for highly demanding heterogeneous catalysis due to the small channel dimensions that minimize diffusional limitations and enhance mass and heat transport between ...
    • Accurate thermal prediction model for building-integrated photovoltaics systems using guided artificial intelligence algorithms 

      Serrano-Luján, Lucía; Toledo, Carlos; Colmenar, José Manuel; Abad, José; Urbina Yeregui, Antonio (Elsevier Ltd, 2022)   Artículo / Artikulua  OpenAccess
      Progress in development of building-integrated photovoltaic systems is still hindered by the complexity of the physics and materials properties of the photovoltaic (PV) modules and its effect on the thermal behavior of the ...
    • Achieving transfer from mathematics learning 

      Orón, José Víctor; Lizasoain Iriso, María Inmaculada Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The question of transfer is a special challenge in mathematics teaching because the wide range and fragmentation of the curricula have in many cases fostered an instrumental understanding, which makes transfer difficult ...
    • Acid-catalyzed etherification of glycerol with tert-butanol: reaction monitoring through a complete identification of the produced alkyl ethers 

      Cornejo Ibergallartu, Alfonso Upna Orcid; Reyero Zaragoza, Inés Upna Orcid; Campo Aranguren, Idoia; Arzamendi Manterola, María Cruz Upna Orcid; Gandía Pascual, Luis Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      Higher tert-Butyl glycerol ethers (tBGEs) are interesting glycerol derivatives that can be produced from tert-butyl alcohol (TBA) and glycerol using an acid catalyst. Glycerol tert-butylation is a complex reaction that ...
    • 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 ...
    • Addendum to "uniqueness of unconditional basis of infinite direct sums of quasi-Banach spaces" 

      Albiac Alesanco, Fernando José Upna Orcid; Ansorena, José L. (Springer, 2022)   Artículo / Artikulua  OpenAccess
      After [Uniqueness of unconditional basis of infinite direct sums of quasi-Banach spaces, Positivity 26 (2022), Paper no. 35] was published, we realized that Theorem 4.2 therein, when combined with work of Casazza and Kalton ...
    • ADDISC lumbar disc prosthesis: analytical and FEA testing of novel implants 

      Vanaclocha, Amparo; Vanaclocha, Vicente; Atienza, Carlos M.; Jordá Gómez, Pablo; Díaz Jiménez, Cristina; García Lorente, José Antonio Upna Orcid; Sáiz Sapena, Nieves; Vanaclocha, Leyre (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The intact intervertebral disc is a six-freedom degree elastic deformation structure with shock absorption. “Ball-and-socket” TDR do not reproduce these properties inducing zygapophyseal joint overload. Elastomeric TDRs ...
    • 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 ...
    • Afinidad entre queratosas de lana y distintos iones en fase acuosa analizada mediante sedimentación 

      Soria Biurrun, Tomás; Abarzuza, Laura; Fernández d'Arlas Bidegain, Borja (Asociación de Químicos e Ingenieros del Instituto Químico de Sarriá, 2023)   Artículo / Artikulua  OpenAccess
      En este artículo se presentan los resultados de unos sencillos ensayos de solubilidad de la queratina en me-dios tanto básico, cercano al punto isoeléctrico como ácido en presencia de distintas sales tales como haluros ...
    • 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 ...
    • An alternative methodology for the evaluation of photocatalytic activity of polymeric coatings by monitoring dye degradation 

      Sandúa Fernández, Xabier; Rivero Fuente, Pedro J. Upna Orcid; Palacio, José F.; Esparza Gorráiz, Joseba; Rodríguez Trías, Rafael Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      This work provides an alternative method for evaluating the photodegradation behaviour of different types of dyes such as Methylene Blue, Rhodamine B, Congo Red, Metanil Yellow, and Malachite Green. In this methodology, ...
    • 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. ...
    • Analog lock-in amplifier design using subsampling for accuracy enhancement in GMI sensor applications 

      Algueta-Miguel, Jose M. Upna Orcid; Beato López, Juan Jesús Upna Orcid; López Martín, Antonio Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      A frequency downscaling technique for enhancing the accuracy of analog lock-in amplifier (LIA) architectures in giant magneto-impedance (GMI) sensor applications is presented in this paper. As a proof of concept, the ...
    • 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  OpenAccess
      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 by temperature-programmed reduction of the catalytic system Ni-Mo-Pd/Al2O3 

      Pedroarena Apezteguía, Iván Upna Orcid; Grande López, Lucía Upna; Torrez Herrera, Jonathan Josué Upna; Korili, Sophia A. Upna Orcid; Gil Bravo, Antonio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      Alumina-supported nickel catalysts are used to facilitate many reactions at various scales. However, the deactivation of these catalysts is an important problem that has prompted the search for solutions such as the ...
    • Analysis of bright bolides recorded between October and November 2022 by 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; San Segundo, A.; Ávila, D.; Tosar, B.; Gómez-Hernández, A.; Gómez-Martínez, Juan; García, Antonio; Aimee, A. I. (MeteorNews, 2023)   Artículo / Artikulua  OpenAccess
      We present in this work the analysis of some of the bright fireballs spotted in the framework of the Southwestern Europe Meteor Network (SWEMN) between October and November 2022. They have been observed from the Iberian ...
    • Analysis of remarkable bolides observed between June and July 2022 in the framework of the Southwestern EuropeMeteor 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; San Segundo, A.; Ávila, D.; Tosar, B.; Gómez-Hernández, A.; Gómez-Martínez, J.; García, A.; Aimee, A. I. (MeteorNews, 2022)   Artículo / Artikulua  OpenAccess
      Some of the bright bolides spotted in the framework of the Southwestern Europe Meteor Network from June to July 2022 are discussed here. These were observed from Spain. Their absolute magnitude ranges from –6 to –11. ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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