Now showing items 58-72 of 72

    • Random fiber lasers: application to fiber optic sensors networks 

      López-Amo Sáinz, Manuel Upna Orcid; Leandro González, Daniel Upna Orcid; Miguel Soto, Verónica de Upna Orcid; Bravo Acha, Mikel Upna Orcid; Fernández Vallejo, Montserrat Upna; Pérez Herrera, Rosa Ana Upna Orcid (IEEE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Recently, random mirrors have been proposed as a method to create fiber laser cavities. This kind of cavity is based on cooperative Rayleigh scattering, which is generated along a fiber due to the material inhomogeneities ...
    • Ransomware encrypted your files but you restored them from network traffic 

      Berrueta Irigoyen, Eduardo Upna Orcid; Morató Osés, Daniel Upna Orcid; Magaña Lizarrondo, Eduardo Upna Orcid; Izal Azcárate, Mikel Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      In a scenario where user files are stored in a network shared volume, a single computer infected by ransomware could encrypt the whole set of shared files, with a large impact on user productivity. On the other hand, medium ...
    • Relative humidity multi-point optical sensors system based on Fast Fourier multiplexing technique 

      López Aldaba, Aitor Upna; López Torres, Diego Upna Orcid; Elosúa Aguado, César Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; Arregui San Martín, Francisco Javier Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, a new multipoint optical fiber system for relative humidity measurements based on Sn02-FP (Fabry-Pérot) sensing heads and an optical interrogator as single active device is presented and characterized. The ...
    • Sensorless active damping strategy for parallel interleaved voltage source power converters with LCL filter 

      Samanes Pascual, Javier Upna Orcid; Gubía Villabona, Eugenio Upna Orcid (IEEE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Grid-connected pulse-width modulation converters with LCL filters are widely extended as an interface for renewable energy generating systems. Those filters arise stability issues due to the filter resonance, which, must ...
    • Single feedback regulation of the AC voltage for high-power inverters under stand-alone operation 

      Erdocia Zabala, Ioseba Upna; Urtasun Erburu, Andoni Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Energy-storage inverters under stand-alone operation must control the output voltage. However, existing methods for instantaneous voltage regulation are not suitable for high-power inverters due to their limited sampling ...
    • SnO2-MOF-Fabry-Pérot humidity optical sensor system based on Fast Fourier transform technique 

      López Aldaba, Aitor Upna; López Torres, Diego Upna Orcid; Ascorbe Muruzabal, Joaquín Upna Orcid; Rota Rodrigo, Sergio Upna; Elosúa Aguado, César Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, a new sensor system for relative humidity measurements based on a SnO2 sputtering deposition on a microstructured optical fiber (MOF) low-finesse Fabry-Pérot (FP) sensing head is presented and characterized. ...
    • A strategic multistage tactical two-stage stochastic optimization model for the airline fleet management problem 

      Serrano Hernández, Adrián Upna Orcid; Cadarso, Luis; Faulín Fajardo, Javier Upna Orcid (Elsevier, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This work proposes stochastic optimization for the airline fleet management problem, considering uncertainty in the demand, operational costs, and fares. In particular, a multistage tree is proposed, compounded of strategic ...
    • Strengthened ordered directional and other generalizations of monotonicity for aggregation functions 

      Sesma Sara, Mikel Upna Orcid; Miguel Turullols, Laura de Upna Orcid; Lafuente López, Julio Upna Orcid; Barrenechea Tartas, Edurne Upna Orcid; Mesiar, Radko; Bustince Sola, Humberto Upna Orcid (Springer, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A tendency in the theory of aggregation functions is the generalization of the monotonicity condition. In this work, we examine the latest developments in terms of different generalizations. In particular, we discuss ...
    • Structural health monitoring of solar trackers using distributed fiber optic sensors 

      Mariñelarena Ollacarizqueta, Jon Upna Orcid; Mompó Roselló, Juan José Upna; Zurita Gabasa, Jesús Upna; Urricelqui Polvorinos, Javier Upna Orcid; Júdez Colorado, Aitor Upna; López-Amo Sáinz, Manuel Upna Orcid; Jiménez Romero, Sergio; Achaerandio, Álvaro; Loayssa Lara, Alayn Upna Orcid (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate the application of a novel type of distributed fiber optic sensors (DFOSs) to dynamically monitor the effects of wind on solar tracker structures used in photovoltaic power stations. This DFOS is based on ...
    • Super-resolution for Sentinel-2 images 

      Galar Idoate, Mikel Upna Orcid; Sesma Redín, Rubén; Ayala Lauroba, Christian; Aranda, C. (International Society for Photogrammetry and Remote Sensing, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Obtaining Sentinel-2 imagery of higher spatial resolution than the native bands while ensuring that output imagery preserves the original radiometry has become a key issue since the deployment of Sentinel-2 satellites. ...
    • T-overlap functions: a generalization of bivariate overlap functions by t-norms 

      Zapata, Hugo; Pereira Dimuro, Graçaliz Upna Orcid; Fernández Fernández, Francisco Javier Upna Orcid; Bustince Sola, Humberto Upna Orcid (Springer, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper introduces a generalization of overlap functions by extending one of the boundary conditions of its definition. More specifically, instead of requiring that 'the considered function is equal to zero if and only ...
    • Title enhancement of the sensitivity of a volatile organic compounds MOF-sensor by means of its structure 

      López Torres, Diego Upna Orcid; López Aldaba, Aitor Upna; Elosúa Aguado, César Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we experimentally compare several core structures of Microstructured Optical Fibers (MOFs) for low-finesse Fabry-Pérot (FP) sensors. These sensors are designed for Volatile Organic Compounds (VOCs) measurements. ...
    • Ultra-long (275 km) random distributed feedback fiber laser for remote sensor monitoring 

      Miguel Soto, Verónica de Upna Orcid; Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      An interferometric sensor located 275 km away from the monitoring station has been interrogated by a double-pumped random distributed feedback fiber laser, reaching the longest distance in fiber optic remote sensing reported ...
    • Using modelling techniques to analyze urban freight distribution. A case study in Pamplona (Spain) 

      Álvarez, Pablo Upna Orcid; Serrano Hernández, Adrián Upna Orcid; Faulín Fajardo, Javier Upna Orcid; Juan, Ángel Alejandro (Elsevier, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The city of Pamplona, in Spain, is currently experiencing several changes regarding sustainable mobility such as pedestrianization of some streets in the city center, and access control to the Old Town for motor vehicles ...
    • Worst expected ramp rates from cloud speed measurements 

      Wang, Guang Chao; Bosch, Juan Luis; Kurtz, Ben; Parra Laita, Íñigo de la Upna Orcid; Wu, Elynn (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Large PV power ramp rates are of concern and sometimes even explicitly restricted by grid operators. Battery energy storage systems can smooth the power output and maintain ramp rates within permissible limits. To enable ...