• f-HybridMem: a consensual analysis via fuzzy consensus measures and penalty functions 

      Oliveira, Lizandro de Souza; Yamin, Adenauer; Reiser, Renata; Santos, Helida (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper considers the consensual analysis in decision-making (CDM) processes based on fuzzy logic (FL) and interval-valued fuzzy logic (IVFL), providing a CDM-strategy, by exploring the axiomatic properties of fuzzy ...
    • Fabrication of long period gratings by periodically removing the coating of cladding-etched single mode optical fiber towards optical fiber sensor development 

      Ascorbe Muruzabal, Joaquín Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Here, we present a novel method to fabricate long period gratings using standard single mode optical fibers (SMF). These optical devices were fabricated in a three-step process, which consisted of etching the SMF, then ...
    • A family of alternating current amplifiers for ultra-low frequency operation 

      Martincorena Arraiza, Maite Upna Orcid; Carlosena García, Alfonso Upna Orcid; Cruz Blas, Carlos Aristóteles de la Upna Orcid; Beloso Legarra, Javier Upna Orcid; López Martín, Antonio Upna Orcid (Wiley, 2021)   Artículo / Artikulua  OpenAccess
      A family of capacitively coupled alternating current (AC) amplifiers featuring ultra-low (below 1 Hz) corner frequency is presented. This is achieved by using high-gain devices which actively boost feedback resistance and ...
    • Far-field and near-field physics of extraordinary THz transmitting hole-array antennas 

      Camacho, Miguel; Boix, Rafael R.; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      Despite three decades of effort, predicting accurately extraordinary transmission through subwavelength hole arrays has proven challenging. The lack of quantitative design and modeling capability to take into account ...
    • Fast and robust ellipse detection algorithm for head-mounted eye tracking systems 

      Martinikorena Aranburu, Ion Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Urtasun, Iñaki; Larumbe Bergera, Andoni Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      In head-mounted eye tracking systems, the correct detection of pupil position is a key factor in estimating gaze direction. However, this is a challenging issue when the videos are recorded in real-world conditions, due ...
    • Fast capacity and internal resistance estimation method for second-life batteries from electric vehicles 

      Braco Sola, Elisa Upna; San Martín Biurrun, Idoia Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The success of second-life (SL) Li-ion batteries from electric vehicles is still conditioned by their technical and economic viability. The knowledge of the internal parameters of retired batteries at the repurposing stage ...
    • Fault detection of planetary gears based on signal space constellations 

      Martincorena Arraiza, Maite Upna Orcid; Cruz Blas, Carlos Aristóteles de la Upna Orcid; López Martín, Antonio Upna Orcid; Molina Vicuña, Cristian; Matías Maestro, Ignacio Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A new method to process the vibration signal acquired by an accelerometer placed in a planetary gearbox housing is proposed, which is useful to detect potential faults. The method is based on the phenomenological model and ...
    • FDTD and empirical exploration of human body and UWB radiation interaction on TOF ranging 

      Otim, Timothy Upna; Bahillo, Alfonso; Díez, Luis E.; López Iturri, Peio Upna Orcid; Falcone Lanas, Francisco Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      In time-of-flight (TOF)-based human ranging systems, target sensors are often mounted on or close to the human body, which may raise non-line-of-sight (NLOS) cases and lead to significant ranging errors depending on the ...
    • Femtosecond laser inscription of diffraction gratings in CYTOP fibers for optical fiber sensing 

      Lomer, Mauro; Roldán Varona, Pablo; Algorri, J. F.; Rodríguez Cobo, Luis; Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; López Higuera, José Miguel (SEDOPTICA, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The use of the new CYTOP fibers for the inscription of optical structures and the sensing of different parameters has started to gain importance in the last decade. This work presents the design and manufacture of a CYTOP ...
    • Fiber optic mirror fabrication using general-purpose metallic pigments 

      Jaso Gallego, Isabel; Mejia-Olivo, Edison; Bravo Acha, Mikel Upna Orcid; Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2023)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, the potential of using general-purpose paints to fabricate highly reflective, low-cost optical mirrors is evaluated. The study shows that high-reflectivity mirrors can be created in standard single-mode fiber ...
    • Fiber optic sensor based on fluorescence quenching for heavy metal detection 

      Fuentes-Rubio, Yadira A.; Domínguez Cruz, René; Baldovino Pantaleón, Oscar; Ruiz Zamarreño, Carlos Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present the preliminary results of a fiber optic sensor based on fluorescence quenching induced by mercury (Hg) concentrations presence in aqueous solutions. The fabrication of the sensor head consists ...
    • Fiber-based early diagnosis of venous thromboembolic disease by label-free D-dimer detection 

      Zubiate Orzanco, Pablo Upna Orcid; Urrutia Azcona, Aitor Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Egea Urra, Josune; Fernández Irigoyen, Joaquín Upna Orcid; Giannetti, Ambra; Baldini, Francesco; Díaz Lucas, Silvia Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Santamaría, Enrique; Chiavaioli, Francesco; Del Villar, Ignacio Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      D-dimer is a useful diagnostic biomarker for deep vein thrombosis or pulmonary embolism, collectively referred to as venous thromboembolism (VTE). The ability to detect in real-time the amount of D-dimer with a fast and ...
    • Fiber-based label-free D-dimer detection for early diagnosis of venous thromboembolism 

      Zubiate Orzanco, Pablo Upna Orcid; Urrutia Azcona, Aitor Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Fernández Irigoyen, Joaquín Upna Orcid; Giannetti, Ambra; Baldini, Francesco; Díaz Lucas, Silvia Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Santamaría, Enrique; Del Villar, Ignacio Upna Orcid; Chiavaioli, Francesco (SPIE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      D-dimer is a useful diagnostic biomarker for deep vein thrombosis or pulmonary embolism, collectively referred to as venous thromboembolism (VTE). The ability to detect in real-time the amount of D-dimer with a fast and ...
    • Fiber-optic biosensor based on lossy mode resonances 

      Socorro Leránoz, Abián Bentor Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Del Villar, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio (Elsevier, 2012)   Artículo / Artikulua
    • Fiber-optic brillouin distributed sensors: from dynamic to long-range measurements 

      Loayssa Lara, Alayn; Urricelqui Polvorinos, Javier Upna Orcid; Iribas Pardo, Haritz Upna Orcid; Mompó Roselló, Juan José Upna; Mariñelarena Ollacarizqueta, Jon Upna Orcid (CRC Press, 2018)   Capítulo de libro / Liburuen kapitulua  OpenAccess
      This chapter focuses on Brillouin optical time-domain analysis (BOTDA) sensors because they are the most successful Brillouin distributed sensors (BDS) type in terms of performance and practical applications. Distributed ...
    • Fifth-generation (5G) mmwave spatial channel characterization for urban environments’ system analysis 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López Iturri, Peio Upna Orcid; Zuñiga Mejia, Jaime; Aguirre Gallego, Erik Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2020)   Artículo / Artikulua  OpenAccess
      In this work, the channel characterization in terms of large-scale propagation, small-scale propagation, statistical and interference analysis of Fifth-Generation (5G) Millimeter Wave (mmWave) bands for wireless networks ...
    • Filtro paso banda en tecnología groove gap waveguide con altura de pines reducida para facilitar su fabricación 

      Santiago Arriazu, David; Gómez Laso, Miguel Ángel Upna Orcid; Lopetegui Beregaña, José María; Arregui Padilla, Iván Upna Orcid (Universidad de Málaga, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a novel topology of groove gap waveguide (GGW) technology is presented to facilitate the fabrication process by Computer Numerical Control (CNC) milling. GGW has been proposed as an interesting alternative ...
    • Flat lens antenna using gap waveguide technology at millimeter waves 

      Pérez Quintana, Dayan Upna Orcid; Bilitos, Christos; Ruiz-García, Jorge; González-Ovejero, David; Beruete Díaz, Miguel Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, a flat lens antenna using Gap Waveguide (GW) technology working in the millimeter waves band was designed. The metamaterial lens is fed using a Groove Gap Waveguide (GGW) horn antenna in order to achieve a ...
    • Fluorescent sensors for the detection of heavy metal ions in aqueous media 

      Acha Morrás, Nerea de Upna Orcid; Elosúa Aguado, César Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Due to the risks that water contamination implies for human health and environmental protection, monitoring the quality of water is a major concern of the present era. Therefore, in recent years several efforts have been ...
    • Folded Cascode OTA with 5540 MHzpF/mA FoM 

      Garde Luque, María Pilar Upna Orcid; López Martín, Antonio Upna Orcid; Carvajal, Ramón G.; Ramírez-Angulo, Jaime (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A micropower single-stage folded cascode amplifier able to drive a wide range of capacitive loads is presented. It features class AB operation and includes power-efficient adaptive biasing techniques, which provide enhanced ...

      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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