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    • A biological insight of hops wastes vermicomposting by Eisenia Andrei 

      González Moreno, Miguel Ángel Upna Orcid; García Gracianteparaluceta, Beñat; Marcelino Sádaba, Sara Upna Orcid; Prieto Cobo, Eduardo Upna Orcid; Seco Meneses, Andrés Upna Orcid (Springer, 2024)   Artículo / Artikulua  OpenAccess
      The study was conducted to assess the feasibility of using Eisenia andrei earthworms for vermicomposting hop remains from a lupulin extraction enterprises for the brewing industry. Vermicomposting process was conducted ...

    • Comment on 'Effects of Vivifrail multicomponent intervention on functional capacity' by Casas-Herrero et al.-The authors reply. 

      Sánchez Sánchez, Juan Luis Upna; Izquierdo Redín, Mikel; López Saez de Asteasu, Mikel; Antón Rodrigo, Iván; Galbete Jiménez, Arkaitz Upna Orcid; Álvarez Bustos, Alejandro; Casas Herrero, Álvaro Upna (Wiley, 2024)   Artículo / Artikulua  OpenAccess
      In this response letter, we would like to clarify some aspects related to the methodology and inferences derived from our work entitled 'Effects of Vivifrail multicomponent intervention on functional capacity', which was ...

    • Monthly intercepted photosynthetically active radiation estimation based on the Beer-Lambert's law across the cereal crops of Castilla y León (Spain) 

      Garrachón-Gómez, Elena; García Ruiz, Ignacio Upna Orcid; García-Rodríguez, Ana; García-Rodríguez, Sol; Alonso-Tristán, Cristina (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Agriculture is by far the most important economic activity in the Spanish autonomous region of Castilla y León. Numerous factors influence crop development but one of the most related variables to the photosynthetic process ...

    • Low-sidelobe-level millimeter-wave asymmetric bull's eye antenna with minimal profile feeding 

      Navarro Cía, Miguel Upna Orcid; Beaskoetxea Gartzia, Unai Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2024)   Artículo / Artikulua  OpenAccess
      Bull’s eye antennas exhibit remarkable directivity considering their low profile, albeit accompanied by high sidelobes. This undesirable radiation characteristic is tackled here by reporting a complementary split ring ...

    • Construction methods of fuzzy implications on bounded posets 

      Wang, Mei; Zhang, Xiaohong; Bustince Sola, Humberto Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid (Elsevier, 2024)   Artículo / Artikulua
      The fuzzy implication on bounded lattices was introduced by Palmeira et al., and the method of extending fuzzy implications on bounded lattices by using retraction was provided. However, we find that the extension of fuzzy ...

    • Diagnostic and prognostic potential of multiparametric renal MRI in Kidney transplant patients 

      Echeverría Chasco, Rebeca; Martín Moreno, Paloma L.; Aramendía Vidaurreta, Verónica; García-Ruiz, Leyre; Mora-Gutiérrez, José María; Vidorreta Díaz de Cerio, Marta; Villanueva Larre, Arantxa Upna Orcid; Cano, David; Bastarrika, Gorka; García Fernández, Nuria; Fernández Seara, María A. (Wiley, 2024)   Artículo / Artikulua  OpenAccess
      Background: Multiparametric MRI provides assessment of functional and structural parameters in kidney allografts. Itoffers a non-invasive alternative to the current reference standard of kidney biopsy. Purpose: To evaluate ...

    • Enhancement of the power-to-heat energy conversion process of a thermal energy storage cycle through the use of a thermoelectric heat pump 

      Erro Iturralde, Irantzu; Aranguren Garacochea, Patricia Upna Orcid; Sorbet Presentación, Francisco Javier Upna; Bonilla-Campos, Íñigo; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      The principal strategy for achieving a neutral climate entails enhancing the share of renewable energies in the energy mix, in conjunction with promoting innovation in efficient technologies. Thermal energy storage systems ...

    • 4P operational harmonic and blade vibration in wind turbines: a real case study of an active yaw system and a concrete tower 

      Torres Elizondo, Antonio; Gil Soto, José Javier; Plaza Puértolas, Aitor Upna Orcid; Aginaga García, Jokin Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      This study aims to comprehensively investigate the impact of mechanical loads on the performance and lifetime of wind turbines, with particular emphasis on blade vibration at the 4P operational harmonic. Experiments and ...

    • A unified analytical disk cam profile generation methodology using the Instantaneous Center of Rotation for educational purpose 

      Iriarte Goñi, Xabier Upna Orcid; Bacaicoa Díaz, Julen Upna Orcid; Plaza Puértolas, Aitor Upna Orcid; Aginaga García, Jokin Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Cam design is a fundamental part of the Mechanism and Machine Theory (MMT) and is included in the vast majority of MMT books. Cam profile design is usually determined with graphical and analytical methods. Graphical methods ...

    • Ultrahigh refractive index sensitivity with lossy mode resonance in a side-polished low-index polymer optical fiber 

      López Vargas, Juan David; Matías Maestro, Ignacio Upna Orcid; Werneck, Marcelo M.; Allil, Regina C.; Del Villar, Ignacio Upna Orcid (IEEE, 2024)   Artículo / Artikulua  OpenAccess
      This work presents a theoretical–experimental study of a refractive index (RI) sensor based on lossy mode resonances (LMRs) generated with a side-polished low-index polymer optical fiber. The theoretical part involves ...

    • Non-symmetric over-time pooling using pseudo-grouping functions for convolutional neural networks 

      Ferrero Jaurrieta, Mikel; Paiva, Rui; Cruz, Anderson; Bedregal, Benjamin Upna Orcid; Miguel Turullols, Laura de Upna Orcid; Takáč, Zdenko; López Molina, Carlos Upna Orcid; Bustince Sola, Humberto Upna Orcid (Elsevier, 2024)   Artículo / Artikulua
      Convolutional Neural Networks (CNNs) are a family of networks that have become state-of-the-art in several fields of artificial intelligence due to their ability to extract spatial features. In the context of natural ...

    • From fundamental materials chemistry to sensing applications: unravelling the water adsorption mechanism of a luminescent optical fibre sensor membrane 

      Cruz Quesada, Guillermo Upna Orcid; Rosales Reina, Beatriz; López Torres, Diego Upna Orcid; Reinoso, Santiago Upna Orcid; López Ramón, María Victoria; Arzamendi Manterola, María Cruz Upna Orcid; Elosúa Aguado, César Upna Orcid; Espinal Viguri, Maialen Upna Orcid; Garrido Segovia, Julián José Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      This work provides insight into the correlation between the luminescent response of a water-vapour optical fibre sensor and the textural properties of its lanthanide-doped silica coating. To this end, a library of 16 silica ...

    • On the characterization of lithium-ion batteries under overtemperature and overcharge conditions: identification of abuse areas and experimental validation 

      Lalinde Sainz, Iñaki; Berrueta Irigoyen, Alberto Upna Orcid; Arza, Joseba; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Although lithium-ion batteries have gained considerable popularity in renewable energy and electric vehicle applications, their safety still remains a concern under certain voltage, temperature, or state of charge conditions. ...

    • Photoisomerization-induced LMR shift for UV radiation detection 

      Gallego Martínez, Elieser Ernesto; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2024)   Artículo / Artikulua
      This work presents an optical sensor for ultraviolet radiation (UV) detection, based on the combined effects of Lossy Mode Resonance (LMR) in the mid infrared (MIR) spectral region and the photoisomerization of a polymeric ...

    • Design and optimization of thermoelectric generators for harnessing geothermal anomalies: a computational model and validation with experimental field results 

      Alegría Cía, Patricia; Catalán Ros, Leyre Upna Orcid; Araiz Vega, Miguel Upna Orcid; Erro Iturralde, Irantzu; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      Thermoelectric generators have been recently proved to be a feasible alternative to harness hot dry rock fields with very promising results transforming the geothermal heat into electricity. This research deepens in the ...

    • Generation of lossy mode resonances (LMR) using perovskite nanofilms 

      Armas, Dayron; Matías Maestro, Ignacio Upna Orcid; López-González, M. Carmen; Ruiz Zamarreño, Carlos Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Del Villar, Ignacio Upna Orcid; Romero, Beatriz (Chinese Academy of Sciences, 2024)   Artículo / Artikulua  OpenAccess
      The results presented here show for the first time the experimental demonstration of the fabrication of lossy mode resonance (LMR) devices based on perovskite coatings deposited on planar waveguides. Perovskite thin films ...

    • Ag@Fe3O4-coated U-shaped plastic optical fiber sensor for H2S detection 

      López Vargas, Juan David; Dante, Alex; Allil, Regina C.; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Werneck, Marcelo M. (Elsevier, 2024)   Artículo / Artikulua
      This work presents the fabrication of U-shaped plastic optical fiber (POF) sensors for hydrogen sulfide (H2S) detection, coated with Fe3O4 nanoparticles synthetized using the Pulsed Laser Ablation in Liquid (PLAL) technique. ...

    • IIoT low-cost Zigbee-based WSN implementation for enhanced production efficiency in a solar protection curtains manufacturing workshop 

      Klaina, Hicham Upna; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Biurrun, Aitor; Alejos, Ana; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Falcone Lanas, Francisco Upna Orcid (MDPI, 2024)   Artículo / Artikulua  OpenAccess
      Nowadays, the Industry 4.0 concept and the Industrial Internet of Things (IIoT) are considered essential for the implementation of automated manufacturing processes across various industrial settings. In this regard, ...

    • UAVradio: Radio link path loss estimation for UAVs 

      Aláez Gómez, Daniel; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Villadangos Alonso, Jesús Upna Orcid (Elsevier, 2024)   Artículo / Artikulua  OpenAccess
      The UAVRadio Python module is a comprehensive toolkit designed to facilitate the analysis and prediction of radio signal path loss in Unmanned Aerial Vehicle (UAV) communication scenarios. The module encompasses a range ...

    • Robots for elderly care: review, multi-criteria optimization model and qualitative case study 

      Sawik, Bartosz; Tobis, Sławomir; Baum, Ewa; Suwalska, Aleksandra; Kropińska, Sylwia; Stachnik, Katarzyna; Pérez-Bernabeu, Elena; Cildoz Esquíroz, Marta Upna Orcid; Agustín Martín, Alba; Wieczorowska-Tobis, Katarzyna. (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      This paper focuses on three areas: the first is a review of current knowledge about social and service robots for elderly care. The second is an optimization conceptual model aimed at maximizing the efficiency of assigning ...
      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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