• Quadcopter neural controller for take-off and landing in windy environments 

      Olaz Moratinos, Xabier; Aláez Gómez, Daniel; Prieto Míguez, Manuel; Villadangos Alonso, Jesús Upna Orcid; Astrain Escola, José Javier Upna Orcid (Elsevier, 2023)   Artículo / Artikulua
      This paper proposes the design of a quadcopter neural controller based on Reinforcement Learning (RL) for controlling the complete maneuvers of landing and take-off, even in variable windy conditions. To facilitate RL ...
    • Quantum antenna arrays: the role of quantum interference on direction-dependent photon statistics 

      Liberal Olleta, Íñigo Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Ziolkowski, Richard W. (American Physical Society, 2018)   Artículo / Artikulua  OpenAccess
      We investigate the role of quantum interference phenomena on the characteristics of the fields radiated by an array of quantum emitters. In analogy to, but distinct from, classical outcomes, we demonstrate that the array ...
    • Quantum antireflection temporal coatings: quantum state frequency shifting and inhibited thermal noise amplification 

      Liberal Olleta, Íñigo Upna Orcid; Vázquez Lozano, Juan Enrique; Pacheco-Peña, Víctor Upna Orcid (wiley, 2023)   Artículo / Artikulua  OpenAccess
      The quantum optical response of antireflection temporal coatings (ATCs), that is, matching temporal layers that suppress the generation of backward waves in temporal boundaries, is investigated. The results reveal that ...
    • Quasi-distributed vibration sensing based on weak reflectors and STFT demodulation 

      Leandro González, Daniel Upna Orcid; Zhu, Mengshi; López-Amo Sáinz, Manuel Upna Orcid; Murayama, Hideaki (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      In this work, a new system is proposed for quasi-distributed vibration sensing based on the Doppler effect. The setup employs an optical frequency domain reflectometer (OFDR) and an array of weak reflectors. The short-time ...
    • Quasi-distributed vibration sensing using OFDR and weak reflectors 

      Zhu, Mengshi; Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Murayama, Hideaki (Optical Society of America, 2019)   Artículo / Artikulua  OpenAccess
      The authors proposed a quasi-distributed vibration sensing technique using in-line weak reflectors and optical frequency domain reflectometry (OFDR). As a result, they achieved an 8 kHz measurable vibration frequency with ...
    • A radio channel model for D2D communications blocked by single trees in forest environments 

      Picallo Guembe, Imanol Upna Orcid; Klaina, Hicham Upna; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Celaya Echarri, Mikel Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Eguizábal Garrido, Alejandro; Falcone Lanas, Francisco Javier Upna Orcid; Alejos, Ana (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      In this paper we consider the D2D (Device-to-Device) communication taking place between Wireless Sensor Networks (WSN) elements operating in vegetation environments in order to achieve the radio channel characterization ...
    • Radio wave propagation and WSN deployment in complex utility tunnel environments 

      Celaya Echarri, Mikel Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López Iturri, Peio Upna Orcid; Picallo Guembe, Imanol Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      The significant growth of wireless communications systems in the last years has led to the adoption of a wide range of applications not only for the general public but, also, including utilities and administrative authorities. ...
    • Random subwavelength structures on glass to improve photovoltaic module performance 

      Pinto Fuste, Cristina Leyre Upna Orcid; Cornago Santos, Ignacio; Buceta, Alicia; Zugasti, Eugenia; Bengoechea Apezteguía, Jaione (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      Glass samples have been processed by a single-step self-masking RIE (Reactive Ion Etching) process to obtain random subwavelength structures (SWSs), which mimic anti-reflective and anti-soiling patterns present in nature. ...
    • Ransomware early detection by the analysis of file sharing traffic 

      Morató Osés, Daniel Upna Orcid; Berrueta Irigoyen, Eduardo Upna Orcid; Magaña Lizarrondo, Eduardo Upna Orcid; Izal Azcárate, Mikel Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Crypto ransomware is a type of malware that locks access to user files by encrypting them and demands a ransom in order to obtain the decryption key. This type of malware has become a serious threat for most enterprises. ...
    • Real time measuring system of multiple chemical parameters using microstructured optical fibers based sensors 

      López Aldaba, Aitor Upna; López Torres, Diego Upna Orcid; Elosúa Aguado, César Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      In this paper, a multiplexing system for simultaneous interrogation of optical fiber sensors which measure different parameters is presented and validated. The whole system has been tested with 6 different sensing heads ...
    • Real-time imaging with frequency scanning array antenna for industrial inspection applications at W band 

      Larumbe Gonzalo, Belén Upna; Laviada, Jaime; Ibáñez Loinaz, Asier; Teniente Vallinas, Jorge Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      A real-time imaging system based on a frequency scanning antenna for conveyor belt setups is presented in this paper. The frequency scanning antenna together with an inexpensive parabolic reflector operates at the W band ...
    • Recent developments in fiber optics humidity sensors 

      Ascorbe Muruzabal, Joaquín Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      A wide range of applications such as health, human comfort, agriculture, food processing and storage, and electronic manufacturing, among others, require fast and accurate measurement of humidity. Sensors based on optical ...
    • Recycled granulates manufacturing from spent refractory wastes and magnesium based binder 

      Seco Meneses, Andrés Upna Orcid; Del Castillo García, Jesús María; Perlot, Céline; Marcelino Sádaba, Sara Upna Orcid; Espuelas Zuazu, Sandra Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      This paper analyzes the ability of two Spent Refractory Wastes (SRW) for the manufacturing of recycled granulates for construction applications. A binary magnesium oxide and ground granulated blast furnace slag hydraulic ...
    • Reduced loss and prevention of substrate modes with a novel Coplanar Waveguide based on Gap Waveguide technology 

      Biurrun Quel, Carlos Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Río Bocio, Carlos del Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The Gap Waveguide technology utilizes an Artificial Magnetic Conductor (AMC) to prevent the propagation of electromagnetic (EM) waves under certain conditions, resulting in various gap waveguide configurations. In this ...
    • Reduction of the size of L-fuzzy contexts. A tool for differential diagnoses of diseases 

      Alcalde, Cristina; Burusco Juandeaburre, Ana Upna Orcid (Taylor & Francis, 2019)   Artículo / Artikulua  OpenAccess
      Information extraction from an L-fuzzy context becomes a hard problem when we work with a large set of objects and/or attributes. The goal of this paper is to present two different and complementary techniques to reduce ...
    • Remote access protocols for Desktop-as-a-Service solutions 

      Magaña Lizarrondo, Eduardo Upna Orcid; Sesma Gracia, Iris Upna; Morató Osés, Daniel Upna Orcid; Izal Azcárate, Mikel Upna Orcid (Public Library of Science, 2019)   Artículo / Artikulua  OpenAccess
      The use of remote desktop services on virtualized machines is a general trend to reduce the cost of desktop seats. Instead of assigning a physical machine with its operating system and software to each user, it is considerably ...
    • Remote sensing for plant water content monitoring: a review 

      Quemada Mayoral, Carlos Upna Orcid; Pérez Escudero, José Manuel Upna Orcid; Gonzalo García, Ramón Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Santesteban García, Gonzaga Upna Orcid; Torres Molina, Nazareth Upna Orcid; Iriarte Galarregui, Juan Carlos Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Las redes sociales se han convertido en una de las principales fuentes de información, especialmente entre los más jóvenes. Al mismo tiempo, se ha incrementado la producción y circulación de información falsa o fake news ...
    • Resistance-capacitance thermal models as alternatives to finite-element numerical models in the simulation of thermoelectric modules for electric power generation 

      Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      This paper demonstrates that resistance–capacitance models provide equal results than models based on finiteelement software when predicting the performance of a thermoelectric module under transient-state conditions. Previous ...
    • Response of complementary split ring resonators in composite stratified substrate integrated waveguide 

      Pérez Escudero, José Manuel Upna Orcid; Jarauta Ayensa, Eduardo Upna; Falcone Lanas, Francisco Javier Upna Orcid; Beruete Díaz, Miguel Upna Orcid (American Institute of Physics, 2017)   Artículo / Artikulua  OpenAccess
      In this work, the behavior of a Complementary Split Ring Resonator (CSRR) operating within the quasi-static resonance regime and embedded in a composite stratified Substrate Integrated Waveguide (SIW) with two different ...
    • A review of techniques to enhance an amplifier's performance using resistive local common mode feedback 

      Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; Carvajal, Ramón G.; Torralba, Antonio; Huerta-Chua, Jesús (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      A review of some of the most common applications of the resistive local common mode feedback technique to enhance amplifier’s performance is presented. It is shown that this simple technique offers essential improvement ...

      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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