• Telecommunications on Earth and their possible relation with the anthropic principle 

      Del Villar, Ignacio Upna Orcid (Nicolaus Copernicus University, 2019)   Artículo / Artikulua  OpenAccess
      The society of the information is based on the ability of humans to communicate in real time. This is possible thanks to the emission of electromagnetic waves. In this work it is discussed, by analyzing the round trip time ...
    • Tenderness of PGI "Ternera de Navarra" beef samples determined by FTIR-MIR spectroscopy 

      Beriain Apesteguía, María José Upna Orcid; Lozano Saiz, María; Echeverría Morrás, Jesús Upna Orcid; Murillo Arbizu, María Teresa Upna Orcid; Insausti Barrenetxea, Kizkitza Upna Orcid; Beruete Díaz, Miguel Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      Understanding meat quality attribute changes during ageing by using non-destructive techniques is an emergent pursuit in the agroindustry research field. Using beef certified samples from the protected geographical indication ...
    • Thermoelectric generator with passive biphasic thermosyphon heat exchanger for waste heat recovery: design and experimentation 

      Araiz Vega, Miguel Upna Orcid; Casi Satrústegui, Álvaro Upna Orcid; Catalán Ros, Leyre Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      One of the measures to fight against the current energy situation and reduce the energy consumption at an industrial process is to recover waste heat and transform it into electric power. Thermoelectric generators can be ...
    • THz sensing with anomalous extraordinary optical transmission hole arrays 

      Jáuregui López, Irati Upna Orcid; Rodríguez Ulibarri, Pablo Upna Orcid; Kuznetsov, Sergei A.; Nikolaev, Nazar A.; Beruete Díaz, Miguel Upna Orcid (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Subwavelength hole array (HA) metasurfaces support the so-called extraordinary optical transmission (EOT) resonance that has already been exploited for sensing. In this work, we demonstrate the superior performance of a ...
    • El todo por la parte: la polémica en torno a los nombres de las víctimas en el memorial del cementerio de La Almudena 

      García Funes, Juan Carlos Upna Orcid (Antonio Machado libros, 2020)   Capítulo de libro / Liburuen kapitulua
    • Towards environmental RF-EMF assessment of mmwave high-node density complex heterogeneous environments 

      Celaya Echarri, Mikel Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Rodríguez Corbo, Fidel Alejandro; López Iturri, Peio Upna Orcid; Ramos González, Victoria; Alibakhshikenari, Mohammad; Shubair, Raed M.; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      The densification of multiple wireless communication systems that coexist nowadays, as well as the 5G new generation cellular systems advent towards the millimeter wave (mmWave) frequency range, give rise to complex ...
    • Towards sub-meter level UWB indoor localization using body wearable sensors 

      Otim, Timothy Upna; Bahillo, Alfonso; Enrique Díez, Luis; López Iturri, Peio Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Thanks to its ability to provide sub-meter level positioning accuracy, Ultrawideband (UWB) has found wide use in several wireless body area network (WBAN) applications such as ambient assisted living, remote patient ...
    • Trends in the design of intensity-based optical fiber biosensors (2010–2020) 

      Acha Morrás, Nerea de Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Elosúa Aguado, César Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      There exists an increasing interest in monitoring low concentrations of biochemical species, as they allow the early-stage detection of illnesses or the monitoring of the environment quality. Thus, both companies and ...
    • Trends in the design of wavelength-based optical fibre biosensors (2008–2018) 

      Socorro Leránoz, Abián Bentor Upna Orcid; Santano, Desiree Upna Orcid; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      During the last decades, both governments and companies have been committed to the continuous checking of biological parameters, which can prevent extra costs to administrations. A very efficient way to address this issue ...
    • Tripod-loop metasurfaces for terahertz-sensing applications: a comparison 

      Jáuregui López, Irati Upna Orcid; Orazbayev, Bakhtiyar Upna Orcid; Pacheco-Peña, Víctor Upna Orcid; Beruete Díaz, Miguel Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The high electric field intensity achieved on the surface of sensors based on metasurfaces (metasensors) makes them an excellent alternative for sensing applications where the volume of the sample to be identified is tiny ...
    • Tunable sensitivity in long period fiber gratings during mode transition with low refractive index intermediate layer 

      Del Villar, Ignacio Upna Orcid; Montoya-Cardona, Jorge; Imas González, José Javier Upna Orcid; Reyes-Vera, Erick; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Cruz, José Luis (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      Double-clad fibers where the second cladding has a lower refractive index than the first cladding, prove to be ideal structures for potentiating and tuning the sensitivity in long-period fiber gratings (LPFGs) operating ...
    • Tuning selection impact on kriging-aided in-building path loss modeling 

      Diago Mosquera, Melissa; Aragón Zavala, Alejandro; Rodríguez Corbo, Fidel Alejandro; Celaya Echarri, Mikel Upna Orcid; Shubair, Raed M.; Azpilicueta Fernández de las Heras, Leyre Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      How do you know you select enough tuning dataset from measurements to guarantee model prediction accuracy? Tuning datasets are often selected based on simple random sampling with predefined rates. Usually, these rates ...
    • Tutorial on the conservation of momentum in photonic time-varying media [Invited] 

      Ortega Gómez, Ángel; Lobet, Michaël; Vázquez Lozano, Juan Enrique; Liberal Olleta, Íñigo Upna Orcid (Optica, 2023)   Artículo / Artikulua  OpenAccess
      Time-varying media break temporal symmetries while preserving spatial symmetries intact. Thus, it represents an excellent conceptual framework to investigate the fundamental implications of Noether’s theorem for the ...
    • Twin lossy mode resonance on a single D-shaped optical fiber 

      Imas González, José Javier Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Del Villar, Ignacio Upna Orcid; Pérez Escudero, José Manuel Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optica, 2021)   Artículo / Artikulua  OpenAccess
      This letter presents the fabrication of dual lossy mode resonance (LMR) refractometers based on titanium dioxide (TiO2) and tin oxide (SnO2) thin films deposited on a single side-polished D-shaped optical fiber. For the ...
    • Two-wavelength phase-sensitive OTDR sensor using perfect periodic correlation codes for measurement range enhancement, noise reduction and fading compensation 

      Sagüés García, Mikel Upna Orcid; Piñeiro Ben, Enrique; Cerri, Enis; Minardo, Aldo; Eyal, Avishay; Loayssa Lara, Alayn (Optica, 2021)   Artículo / Artikulua  OpenAccess
      We demonstrate a two-wavelength differential-phase-measuring OTDR sensor that uses perfect periodic correlation phase codes to enhance the measurement performance. The two-wavelength technique extends the measurement range ...
    • 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 ...
    • Ultra-low frequency multidirectional harvester for wind turbines 

      Castellano Aldave, Jesús Carlos; Carlosena García, Alfonso Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      In this paper we propose, and demonstrate through a prototype, a completely novel device able to harvest mechanical energy from the multidirectional vibrations in a wind turbine, and convert it into electrical, to power ...
    • Ultrathin and high-efficiency Pancharatnam-Berry phase metalens for millimeter waves 

      Moreno-Peñarrubia, Alexia; Teniente Vallinas, Jorge Upna Orcid; Kuznetsov, Sergei A.; Orazbayev, Bakhtiyar Upna Orcid; Beruete Díaz, Miguel Upna Orcid (AIP Publishing, 2021)   Artículo / Artikulua  OpenAccess
      Applying the Pancharatnam–Berry (PB) principle to half-wave plate (HWP) metasurfaces allows the manipulation of wavefronts along with the conversion of the handedness of circularly polarized incident waves by simply rotating ...
    • Ultrathin sub-terahertz half-wave plate with high conversion efficiency based on zigzag metasurface 

      Moreno-Peñarrubia, Alexia; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      In this communication, an ultrathin transmissive half-wave plate (HWP) based on a bi-layered zigzag metasurface operating at the lower frequency edge of the terahertz (THz) spectrum is numerically and experimentally studied. ...
    • UV light detection with side polished CYTOP fiber 

      Ayechu Abendaño, Ada; Santano, Desiree Upna Orcid; López Vargas, Juan David; Matías Maestro, Ignacio Upna Orcid; Del Villar, Ignacio Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      Cyclic transparent optical polymer (CYTOP) fiber, used mainly in strain detection and refractive index characterization of liquids, can be polished for the detection of ultraviolet (UV) light radiation. The study investigates ...

      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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