• Improvement of a thermoelectric and vapour compression hybrid refrigerator 

      Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Rodríguez García, Antonio Upna Orcid (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      This paper presents the improvement in the performance of a domestic hybrid refrigerator that combines vapour compression technology for the cooler and freezer compartments, and thermoelectric technology for a new compartment. ...
    • In vitro comparison of Günther Tulip and Celect filters. Testing filtering efficiency and pressure drop 

      Nicolás, M.; Malvè, Mauro Upna Orcid; Peña, Estefanía; Martínez, Miguel Ángel; Leask, R. (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      In this study, the trapping ability of the Günther Tulip and Celect inferior vena cava filters was evaluated. Thrombus capture rates of the filters were tested in vitro in horizontal position with thrombus diameters of 3 ...
    • Influence of a commercial antithrombotic filter on the caval blood flow during neutra and valsalva maneuver 

      Nicolás, M.; Lucea, B.; Laborda, A.; Peña, Estefanía; Malvè, Mauro Upna Orcid (ASME, 2017)   Artículo / Artikulua  OpenAccess
      Anticoagulants are the treatment of choice for pulmonary embolism. When these fail or are contraindicated, vena cava filters are effective devices for preventing clots from the legs from migrating to the lung. Many ...
    • Influence of maintenance actions in the drying stage of a paper mill on CO2 emissions 

      Calvo Herrero, Luis Upna; Domingo, Rosario (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Greenhouse gases from industrial activities have become a global problem. Emissions management is being developed to raise awareness of the importance of controlling pollution in general and atmospheric emissions in ...
    • Influence of metallic die temperature in the solidification of Cu-10%Al-2%Fe alloy 

      Cenoz Echeverría, Isaac Upna (Walter de Gruyter, 2010)   Artículo / Artikulua  OpenAccess
      The phases obtained in copper aluminium bronze alloy (Cu-Al10-Fe2) cast into a permanent die were investigated. The parameters examined were the pre-heating temperatures of the die and the graphite coating thickness. The ...
    • Influence of the power supply on the energy efficiency of an alkaline water electrolyser 

      Ursúa Rubio, Alfredo Upna Orcid; Marroyo Palomo, Luis Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; Gandía Pascual, Luis Upna Orcid; Diéguez Elizondo, Pedro Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (Elsevier, 2009)   Artículo / Artikulua  OpenAccess
      Electric energy consumption represents the greatest part of the cost of the hydrogen produced by water electrolysis. An effort is being carried out to reduce this electric consumption and improve the global efficiency ...
    • Influencia de la composición y el tratamiento térmico en las propiedades mecánicas de aleaciones de bronce al aluminio 

      Cenoz Echeverría, Isaac Upna; Fernández Carrasquilla, Javier Upna (CENIM, 2007)   Artículo / Artikulua  OpenAccess
      Los cuproaluminios son aleaciones de cobre con contenidos de aluminio del 5-12 % que pueden incorporar hierro, níquel, y manganeso para formar una familia de aleaciones con unas excelentes propiedades de resistencia ...
    • Kinematic design of a new four degree-of-freedom parallel robot for knee rehabilitation 

      Aginaga García, Jokin Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid; Mata, Vicente (ASME, 2018)   Artículo / Artikulua  OpenAccess
      Rehabilitation robots are increasingly being developed in order to be used by injured people to perform exercise and training. As these exercises do not need wide range movements, some parallel robots with lower mobility ...
    • Manufacturing of nanostructured rings from previously ECAE-processed AA5083 alloy by isothermal forging 

      Luis Pérez, Carmelo Upna; Salcedo Pérez, Daniel Upna Orcid; León Iriarte, Javier Upna Orcid; Puertas Arbizu, Ignacio Upna Orcid; Fuertes Bonel, Juan Pablo Upna; Luri Irigoyen, Rodrigo Upna (Hindawi, 2013)   Artículo / Artikulua  OpenAccess
      The manufacturing of a functional hollow mechanical element or ring of the AA5083 alloy previously equal channel angular extrusion (ECAE) processed, which presents a submicrometric microstructure, is dealt with. For this ...
    • Mechanical properties analysis of an Al-Mg alloy connecting rod with submicrometric structure 

      León Iriarte, Javier Upna Orcid; Salcedo Pérez, Daniel Upna Orcid; Murillo Crespo, Óscar; Luis Pérez, Carmelo Upna; Fuertes Bonel, Juan Pablo Upna; Puertas Arbizu, Ignacio Upna Orcid; Luri Irigoyen, Rodrigo Upna (MDPI, 2015)   Artículo / Artikulua  OpenAccess
      Over these last few years, there has been a growing interest in developing mechanical components from submicrometric materials due to the significant improvement that these materials present compared to their original ...
    • Methodology for energy demand reduction of potato cold storage process 

      Sáenz Baños, Mercedes Irache; Latorre Biel, Juan Ignacio; Martínez Cámara, Eduardo; Jiménez Macías, Emilio; Longo, Francesco; Blanco Fernández, Julio (Wiley, 2022)   Artículo / Artikulua  OpenAccess
      In order to maintain the quality of the potatoes over time, it is necessary to store them under certain storage conditions, which minimize losses both of quality and product, preferably without using chemical treatments. ...
    • Microestructura y propiedades mecánicas de una fundición esferoidal ferrítica en bruto de colada para su uso en piezas de grandes dimensiones 

      Suárez Sanabria, Alberto Upna; Fernández Carrasquilla, Javier Upna (CENIM, 2006)   Artículo / Artikulua  OpenAccess
      Con objeto de estudiar el efecto de la velocidad de enfriamiento, composición y microestructura sobre las propiedades mecánicas de una fundición de grafito esferoidal y matriz ferrítica en estado de bruto de colada, para ...
    • Nanomaterials for functional textiles and fibers 

      Rivero Fuente, Pedro J. Upna Orcid; Urrutia Azcona, Aitor Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Springer US, 2015)   Artículo / Artikulua  OpenAccess
      Nanoparticles are very interesting because of their surface properties, different from bulk materials. Such properties make possible to endow ordinary products with new functionalities. Their relatively low cost with ...
    • Net thermoelectric power generation improvement through heat transfer optimization 

      Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Rodríguez García, Antonio Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Thermoelectric generation contributes to obtain a more sustainable energetic system giving its potential to harvest waste heat and convert it into electric power. In the present study a computational optimal net generation ...
    • Numerical and experimental study of the fluid flow through a medical device 

      Nicolás, M.; Palero, V. R.; Peña, Estefanía; Arroyo, M. P.; Malvè, Mauro Upna Orcid (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      The purpose of this paper is to verify a commercial software based fluid–structure interaction scheme for the inferior vena cava. Vena cava deep thrombosis (TVP) is a potentially deathly disease consequent to pulmonary ...
    • On studying the interaction between different stent models and rabbit tracheal tissue: numerical, endoscopic and histological comparison 

      Chaure, J.; Serrano, C.; Fernández-Parra, Rocío; Peña, Estefanía; Malvè, Mauro Upna Orcid (Biomedical Engineering SocietySpringer, 2016)   Artículo / Artikulua  OpenAccess
      Stenting technique is employed worldwide for treating atherosclerotic vessel and tracheal stenosis. Both diseases can be treated by means of metallic stents which present advantages but are affected by the main problem of ...
    • Optical fiber resonance-based pH sensors using gold nanoparticles into polymeric layer-by-layer coatings 

      Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid (Springer-Verlag, 2016)   Artículo / Artikulua
    • A proposal of a constitutive description for aluminium alloys in both cold and hot working 

      León Iriarte, Javier Upna Orcid; Luis Pérez, Carmelo Upna; Fuertes Bonel, Juan Pablo Upna; Puertas Arbizu, Ignacio Upna Orcid; Luri Irigoyen, Rodrigo Upna; Salcedo Pérez, Daniel Upna Orcid (MDPI, 2016)   Artículo / Artikulua  OpenAccess
      The most important difficulties when the behaviour of a part that is subjected to external mechanical forces is simulated deal with the determination of both the material thermo-mechanical properties and its boundary ...
    • Recristalización de bandas de aluminio procedentes de colada continua, laminadas en frío 

      Pérez-Ilzarbe Úriz, Javier; Faustmann Salas, Jaime Upna; Suárez Sanabria, Alberto Upna (CENIM, 2000)   Artículo / Artikulua  OpenAccess
      Este artículo revisa la bibliografía existente sobre los problemas que la banda de colada continua, laminada en frío, presenta en su recristalización. Se examinan los impedimentos que presenta la precipitación de elementos ...
    • Relationship between microstructure and fracture types in a UNS S32205 duplex stainless steel 

      Biezma Moraleda, María Victoria; Berlanga Labari, Carlos Upna Orcid; Argandoña Salinas, Gorka (ABM, ABC, ABPol, 2013)   Artículo / Artikulua  OpenAccess
      Duplex stainless steels are susceptible to the formation of sigma phase at high temperature which could potentially be responsible for catastrophic service failure of components. Thermal treatments were applied to duplex ...

      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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