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    • 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 ...

    • 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 ...

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

      Sanchez Sanchez, Juan luis; 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 ...

    • 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 ...

    • 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 ...

    • 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. ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Photonic controlled metasurface for intelligent antenna beam steering applications including 6G mobile communication systems 

      Muqdad, Zainab S.; Alibakhshikenari, Mohammad; Elwi, Taha A.; Hassain, Zaid Abdul; Virdee, Bal S.; Sharma, Richa; Khan, Salahuddin; Türker Tokan, Nurhan; Livreri, Patrizia; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      This paper presents a novel metasurface antenna whose radiation characteristics can be remotely controlled by optical means using PIN photodiodes. The proposed reconfigurable antenna is implemented using a single radiating ...

    • Virtual antenna array for reduced energy per bit transmission at Sub-5 GHz mobile wireless communication systems 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; Mariyanayagam, Dion; García Zuazola, Ignacio Julio; Benetatos, Harry; Althuwayb, Ayman Abdulhadi; Alali, Bader; Xu, Kai-Da; Falcone Lanas, Francisco Javier Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      This paper presents an innovative technique to synthesize a virtual antenna array (VAA) that consumes less energy than conventional antenna arrays that are used in mobile communications systems. We have shown that for a ...

    • Deadbeat voltage control for a grid-forming power converter with LCL filter 

      Samanes Pascual, Javier Upna Orcid; Rosado Galparsoro, Leyre Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; López Taberna, Jesús Upna Orcid; Pérez, Marcelo A. (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      Grid-forming power converters are controlled as voltage sources to regulate the grid voltage and frequency. These converters can increase power system strength if they impose a voltage waveform resilient to grid transients. ...

    • High sensitivity lossy-mode resonance refractometer using low refractive index PFA planar waveguide 

      Domínguez Rodríguez, Ismel Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Ascorbe Muruzabal, Joaquín Upna Orcid; Del Villar, Ignacio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      In this work a new strategy to improve the sensitivity of refractometers based on lossy-mode resonances has been proved. The proximity of the PFA (tetrafluoroethylene-perfluoro polymer) substrate refractive index to that ...

    • Multi-sensing platform design with a grating-based nanostructure on a coverslip substrate 

      Imas González, José Javier Upna Orcid; Del Villar, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Mukhopadhyay, Subhas C.; Matías Maestro, Ignacio Upna Orcid (Springer, 2023)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Two different thin film designs with a grating pattern are simulated on a soda lime coverslip, which acts as optical waveguide, with the purpose of generating both a lossy mode resonance (LMR) in transmission and reflection ...

    • A multi-splitting method to solve 2D parabolic reaction-diffusion singularly perturbed systems 

      Clavero, Carmelo; Jorge Ulecia, Juan Carlos Upna Orcid (Elsevier, 2023)   Artículo / Artikulua
      In this paper we design and analyze a numerical method to solve a type of reaction-diffusion 2D parabolic singularly perturbed systems. The method combines the central finite difference scheme on an appropriate piecewise ...
      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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