• Proposal and evaluation of typical illuminance year (TIY) generation procedures from illuminance or irradiance data for daylight assessment in the long term 

      García Ruiz, Ignacio Upna Orcid; Blas Corral, María Ángeles de Upna Orcid; Torres Escribano, José Luis Upna Orcid (ElsevierInternational Solar Energy Society, 2020)   Artículo / Artikulua  OpenAccess
      When assessing the long-term daylight availability or the performance of natural lighting systems in a given location, it is necessary to have representative data of local daylight conditions. The use of a daylight test ...
    • A proposal for tuning the α parameter in CαC-integrals for application in fuzzy rule-based classification systems 

      Lucca, Giancarlo; Sanz Delgado, José Antonio Upna Orcid; Pereira Dimuro, Graçaliz Upna Orcid; Bedregal, Benjamin Upna Orcid; Bustince Sola, Humberto Upna Orcid (Springer, 2020)   Artículo / Artikulua  OpenAccess
      In this paper, we consider the concept of extended Choquet integral generalized by a copula, called CC-integral. In particular, we adopt a CC-integral that uses a copula defined by a parameter α, which behavior was tested ...
    • Propuesta de programación formativa específica en PRL para inspectores y directores técnicos de estaciones de inspección técnica de equipos de aplicación de productos fitosanitarios (ITEAF) 

      González Moreno, Miguel Ángel Upna Orcid (Borrmart, 2020)   Artículo / Artikulua  OpenAccess
      El sector agrario es uno de los sectores que tradicionalmente presenta una mayor siniestralidad laboral. Además, hay una carencia informativa en materia preventiva y la formación se limita a la cualificación obligatoria ...
    • Prospects of autonomous volcanic monitoring stations: experimental investigation on thermoelectric generation from fumaroles 

      Catalán Ros, Leyre Upna Orcid; Araiz Vega, Miguel Upna Orcid; Padilla, Germán D.; Hernández, Pedro A.; Pérez, Nemesio M.; García de la Noceda, Celestino; Albert, José F.; Astrain Ulibarrena, David Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      Fumaroles represent evidence of volcanic activity, emitting steam and volcanic gases at temperatures between 70 and 100 °C. Due to the well-known advantages of thermoelectricity, such as reliability, reduced maintenance ...
    • Prospects of waste-heat recovery from a real industry using thermoelectric generators: economic and power output analysis 

      Araiz Vega, Miguel Upna Orcid; Casi Satrústegui, Álvaro Upna Orcid; Catalán Ros, Leyre Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2020)   Artículo / Artikulua  OpenAccess
      One of the options to reduce industrial energy costs and the environmental impact is to recover the waste-heat produce in some processes. This paper proposes the use of thermoelectric generators at a stone wool manufacturing ...
    • Pseudo-three-stage Miller op-amp with enhanced small-signal and large-signal performance 

      Paul, Anindita; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Rocha-Pérez, José Miguel (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      A simple technique to implement highly power efficient class AB-AB Miller op-amps is presented in this paper. It uses a composite input stage with resistive local common mode feedback that provides class AB operation to ...
    • Pulse coding linearization for Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna Orcid; Iribas Pardo, Haritz Upna Orcid; Loayssa Lara, Alayn Upna Orcid (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
      We introduce a simple method to extend the performance of pulse coding techniques in their application to Brillouin optical time-domain analysis sensors (BOTDA). It is based on applying a simple logarithmic processing on ...
    • 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 ...

      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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