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Mostrando ítems 265-284 de 603

    • Identification of critical parameters for the design of energy management algorithms for Li-ion batteries operating in PV power plants 

      Berrueta Irigoyen, Alberto Upna Orcid; Soto Cabria, Adrián Upna Orcid; Marcos Álvarez, Javier Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Lithium-ion batteries are gaining importance for a variety of applications due to their price decrease and characteristics improvement. For a proper use of such storage systems, an energy management algorithm (EMA) is ...

    • 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, ...

    • Impact of a thermoelectric subcooler heat exchanger on a carbon dioxide transcritical refrigeration facility 

      Casi Satrústegui, Álvaro Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Alegría Cía, Patricia; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      To improve the performance of vapour compression refrigeration cycles, the inclusion of a thermoelectric subcooler for low-medium power units has been the focus of recent studies due to its robustness, compactness and ...

    • Impact of body wearable sensor positions on UWB ranging 

      Otim, Timothy Upna; Bahillo, Alfonso; Díez, Luis E.; López Iturri, Peio Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      In recent years, Ultrawideband (UWB) has become a very popular technology for time of flight (TOF) based localization and tracking applications but its human body interactions have not been studied yet extensively. Most ...

    • Impact of micro-cycles on the lifetime of lithium-ion batteries: an experimental study 

      Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Mateos Inza, Miren; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Experimental aging studies are commonly conducted on lithium-ion batteries by full charge and discharge cycles. However, such profiles may differ from the actual operation of batteries in electric vehicles and stationary ...

    • Impedance bandwidth improvement of a planar antenna based on metamaterial-inspired T-matching network 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; Wang, Yan; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Naser Moghadasi, Mohammad; See, Chan H.; Elfergani, Issa; Zebiri, Chemseddine; Abd-Alhameed, Raed; Huynen, Isabelle; Rodriguez, Jonathan; Denidni, Tayeb A.; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (Institute of Electrical and Electronics Engineers Inc., 2021)   Artículo / Artikulua  OpenAccess
      In this paper a metamaterial-inspired T-matching network is directly imbedded inside the feedline of a microstrip antenna to realize optimum power transfer between the front-end of an RF Wireless transceiver and the antenna. ...

    • Implementation and analysis of ISM 2.4 GHz wireless sensor network systems in judo training venues 

      López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2016)   Artículo / Artikulua  OpenAccess
      In this work, the performance of ISM 2.4 GHz Wireless Sensor Networks (WSNs) deployed in judo training venues is analyzed. Judo is a very popular martial art, which is practiced by thousands of people not only at the ...

    • Implementation and operational analysis of an interactive intensive care unit within a smart health context 

      López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Trigo Vilaseca, Jesús Daniel Upna Orcid; Astrain Escola, José Javier Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Serrano Arriezu, Luis Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      In the context of hospital management and operation, Intensive Care Units (ICU) are one of the most challenging in terms of time responsiveness and criticality, in which adequate resource management and signal processing ...

    • Implementation of an interactive environment with multilevel wireless links for distributed botanical garden in university campus 

      Klaina, Hicham Upna; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Astrain Escola, José Javier Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      In this contribution, an end to end system to enable user interaction with a distributed botanical university campus garden is designed, implemented and tested. The proposed system employs different wireless links to collect ...

    • Implementation of radiating elements for radiofrequency front-ends by screen-printing techniques for Internet of Things applications 

      Picallo Guembe, Imanol Upna Orcid; Klaina, Hicham Upna; López Iturri, Peio Upna Orcid; Sánchez, Aitor; Méndez Giménez, Leire; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      The advent of the Internet of Things (IoT) has led to embedding wireless transceivers into a wide range of devices, in order to implement context-aware scenarios, in which a massive amount of transceivers is foreseen. In ...

    • Implementation of wireless sensor network architecture for interactive shopping carts to enable context-aware commercial areas 

      López Iturri, Peio Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Salinero, Eduardo; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      An interactive shopping cart to enable context aware environments within large commercial areas is presented. A wireless sensor network was designed, with specific nodes embedded within the shopping carts and infrastructure ...

    • Improvements in the cooling capacity and the COP of a transcritical CO 2 refrigeration plant operating with a thermoelectric subcooling system 

      Astrain Ulibarrena, David Upna Orcid; Merino Vicente, Amaya Upna; Catalán Ros, Leyre Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Sánchez, Daniel; Cabello, Ramón; Llopis, R. (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Restrictive environmental regulations are driving the use of CO 2 as working fluid in commercial vapour compression plants due to its ultra-low global warming potential (GWP 100 = 1) and its natural condition. However, at ...

    • Improving the performance of fuzzy rule-based classification systems based on a nonaveraging generalization of CC-integrals named C-F1F2-integrals 

      Lucca, Giancarlo; Pereira Dimuro, Graçaliz Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Bustince Sola, Humberto Upna Orcid; Bedregal, Benjamin Upna Orcid; Sanz Delgado, José Antonio Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      A key component of fuzzy rule-based classification systems (FRBCS) is the fuzzy reasoning method (FRM) since it infers the class predicted for new examples. A crucial stage in any FRM is the way in which the information ...

    • Improving the width of lossy mode resonances (LMRs) in double-clad fibers 

      Imas González, José Javier Upna Orcid; Del Villar, Ignacio Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      In this work, the characteristics of lossy mode resonances (LMRs) in double-clad fibers where the refractive index (RI) of the second cladding is lower than that of the first cladding are analyzed both numerically and ...

    • Improving the width of lossy mode resonances in a reflection configuration D-shaped fiber by nanocoating laser ablation 

      Fuentes Lorenzo, Omar Upna; Vaiano, Patrizio; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optical Society of America, 2020)   Artículo / Artikulua  OpenAccess
      The full width at half maximum (FWHM) of lossy mode resonances (LMRs) in the optical spectrum depends on the homogeneity of the thin film deposited. In this Letter, a method for improving the FWHM is applied for an LMR ...

    • In situ synthesis of gold nanoparticles in layer-b y-layer polymeric coatings for the fabrication of optical fiber sensors 

      Martínez Hernández, María Elena Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A new method is proposed to tune the interferometric response of wavelength-based optical fiber sensors. Using the nanoparticle in situ synthesis (ISS) technique, it is possible to synthesize gold nanoparticles (AuNPs) ...

    • In-field energy performance of solar PV module made of UMG silicon 

      Guerra, Moisés R.; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Pascual Miqueleiz, Julio María Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      Upgraded metallurgical grade silicon (UMG-Si) PV modules have failed to make their space in the PV market, which was partly to the uncertainty on their in-field performance that brings the wide disparity of results published ...

    • Incandescent temporal metamaterials 

      Vázquez Lozano, Juan Enrique; Liberal Olleta, Íñigo Upna Orcid (Nature Research, 2023)   Artículo / Artikulua  OpenAccess
      Regarded as a promising alternative to spatially shaping matter, time-varying media can be seized to control and manipulate wave phenomena, including thermal radiation. Here, based upon the framework of macroscopic quantum ...

    • Inclusion of a supercapacitor energy storage system in DFIG and full-converter PMSG wind turbines for inertia emulation 

      Berrueta Irigoyen, Alberto Upna Orcid; Sacristán Sillero, Javier; López Taberna, Jesús Upna Orcid; Rodríguez Izal, José Luis; Ursúa Rubio, Alfredo Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      The energy transition towards renewables must be accelerated to achieve climate targets. To do so, renewable power plants, such as wind power plants (WPPs) must replace conventional power plants (CPPs). Transmission System ...

    • Increasing surface plasmons propagation via photonic nanojets with periodically spaced 3D dielectric cuboids 

      Pacheco-Peña, Víctor Upna Orcid; Minin, Igor V.; Minin, Oleg V.; Beruete Díaz, Miguel Upna Orcid (MDPI, 2016)   Artículo / Artikulua  OpenAccess
      A structure based on periodically arranged 3D dielectric cuboids connected by photonic nanojets (PNJs) is proposed with the aim of increasing the propagation distance of surface plasmon polaritons (SPPs) at the telecom ...
      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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