Now showing items 1-20 of 71

    • Environmental impact analysis of natural cork stopper manufacturing 

      Flor Montalvo, Francisco Javier; Martínez Cámara, Eduardo; García Alcaraz, Jorge Luis; Jiménez Macías, Emilio; Latorre Biel, Juan Ignacio; Blanco Fernández, Julio (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      For both wine makers and customers, natural cork stoppers are a symbol of quality. More-over, they are essential for maintaining the organoleptic properties of bottled wines throughout their lifespan. This research relied ...
    • 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. ...
    • 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 ...
    • 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 ...
    • Symbolic multibody methods for real-time simulation of railway vehicles 

      Ros Ganuza, Javier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Pintor Borobia, Jesús María Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      In this work, recently developed state-of-the-art symbolic multibody methods are tested to accurately model a complex railway vehicle. The model is generated using a symbolic implementation of the principle of virtual ...
    • Auxiliary consumption: a necessary energy that affects thermoelectric generation 

      Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Waste heat recovery can apply to a wide range of applications, from transportation, or industries to domestic appliances. Thermoelectric generation technology applied to those cases could produce electrical energy and thus ...
    • 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 Orcid; 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, ...
    • Thermoelectric generators for waste heat harvesting: a computational and experimental approach 

      Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Waste heat generation has a widespread presence into daily applications, however, due to the low-temperature grade which presents, its exploitation with the most common technologies is complicated. Thermoelectricity ...
    • 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 ...
    • Determination of the symbolic base inertial parameters of planar mechanisms 

      Iriarte Goñi, Xabier Upna Orcid; Ros Ganuza, Javier Upna Orcid; Mata, Vicente; Aginaga García, Jokin Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      The inertial information of a planar mechanical system is characterised using 4 inertial parameters per solid. Due to the kinematic constraints, this parametrisation turns out be redundant. In order to reduce the ...
    • Effect of the temperature in the mechanical properties of austenite, ferrite and sigma phases of duplex stainless steels using hardness, microhardness and nanoindentation techniques 

      Argandoña Salinas, Gorka; Palacio, José F.; Berlanga Labari, Carlos Upna Orcid; Biezma Moraleda, María Victoria; Rivero Fuente, Pedro J. Upna Orcid; Peña, Julio; Rodríguez Trías, Rafael Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The aim of this work is to study the hardness of the ferrite, austenite and sigma phases of a UNS S32760 superduplex stainless steel submitted to different thermal treatments, thus leading to different percentages of the ...
    • Analytical modelling of energy density and optimization of the EDM machining parameters of Inconel 600 

      Torres Salcedo, Alexia Upna Orcid; Puertas Arbizu, Ignacio Upna Orcid; Luis Pérez, Carmelo Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      In this present research work, a new modelling of energy density in EDM (Electrical Discharge Machining) is proposed. Energy density can be defined as the amount of energy needed to get a unit volume of material removed, ...
    • CO2 emissions reduction and energy efficiency improvements in paper making drying process control by sensors 

      Calvo Herrero, Luis Upna; Domingo, Rosario (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The drying process of paper has many production parameters that can influence both the energy consumed and the characteristics of paper produced. It was found that most of the previous studies conducted on this process ...
    • Analysis of fatigue and wear behaviour in ultrafine grained connecting rods 

      Luri Irigoyen, Rodrigo Upna; Luis Pérez, Carmelo Upna; León Iriarte, Javier Upna Orcid; Fuertes Bonel, Juan Pablo Upna; Salcedo Pérez, Daniel Upna Orcid; Puertas Arbizu, Ignacio Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Over the last few years there has been an increasing interest in the study and development of processes that make it possible to obtain ultra-fine grained materials. Although there exists a large number of published works ...
    • Design and mechanical properties analysis of AA5083 ultrafine grained cams 

      Salcedo Pérez, Daniel Upna Orcid; Luis Pérez, Carmelo Upna; Luri Irigoyen, Rodrigo Upna; Puertas Arbizu, Ignacio Upna Orcid; León Iriarte, Javier Upna Orcid; Fuertes Bonel, Juan Pablo Upna (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      This present research work deals with the development of ultrafine grained cams obtained from previously ECAP (Equal Channel Angular Pressing)-processed material and manufactured by isothermal forging. The design and the ...
    • Experimental and computational study on thermoelectric generators using thermosyphons with phase change as heat exchangers 

      Araiz Vega, Miguel Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      An important issue in thermoelectric generators is the thermal design of the heat exchangers since it can improve their performance by increasing the heat absorbed or dissipated by the thermoelectric modules. Due to its ...
    • Experimental bench for hemodynamic study of coronary artery with serial stenoses: fractional flow reserve assessment 

      Coppel, R.; Gómez, A. L.; Finet, G.; Malvè, Mauro Upna Orcid; Pettigrew, R. I. (Taylor & Francis, 2017)   Artículo / Artikulua  OpenAccess
      The aim of this study was to develop an experimental hemodynamic bench to elucidate the influences of such geometrical parameters on the FFR assessment. As a first approach, the present work was focused on the influence ...
    • 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 ...
    • Thermoelectric self-cooling for power electronics: increasing the cooling power 

      Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Thermoelectric self-cooling was firstly conceived to increase, without electricity consumption, the cooling power of passive cooling systems. This paper studies the combination of heat pipe exchangers and thermoelectric ...
    • Design, simulation and manufacturing of a connecting rod from ultra-fine grained material and isothermal forging 

      Fuertes Bonel, Juan Pablo Upna; Luis Pérez, Carmelo Upna; Luri Irigoyen, Rodrigo Upna; Salcedo Pérez, Daniel Upna Orcid; León Iriarte, Javier Upna Orcid; Puertas Arbizu, Ignacio Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      In this research work, a study on the mechanical properties of isothermal forging for connecting rods is made from previously ECAP (Equal Channel Angular Pressing)-processed AA1050 and AA5083 aluminium alloys. This severe ...

      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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