• 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 ...
    • Review on unmanned aerial vehicle assisted sensor node localization in wireless networks: soft computing approaches 

      Annepu, Visalakshi; Sona, Deepika Rani; Ravikumar, Chinthaginjala V.; Bagadi, Kalapraveen; Alibakhshikenari, Mohammad; Althuwayb, Ayman Abdulhadi; Alali, Bader; Virdee, Bal S.; Pau, Giovanni; Dayoub, Iyad; See, Chan H.; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      Node positioning or localization is a critical requisite for numerous position-based applications of wireless sensor network (WSN). Localization using the unmanned aerial vehicle (UAV) is preferred over localization using ...
    • Ring cavity erbium-doped fiber for refractive index measurements 

      Pérez Herrera, Rosa Ana Upna Orcid; Soares, Liliana; Silva, Susana; Frazão, Orlando (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      In this study, an interrogation system based on an erbium-doped fiber ring cavity for refractive index measurements is presented and experimentally demonstrated. This cavity ring includes a 1 × 3 coupler wherein one of the ...
    • Robots for elderly care: review, multi-criteria optimization model and qualitative case study 

      Sawik, Bartosz; Tobis, Sławomir; Baum, Ewa; Suwalska, Aleksandra; Kropińska, Sylwia; Stachnik, Katarzyna; Pérez-Bernabeu, Elena; Cildoz Esquíroz, Marta Upna Orcid; Agustín Martín, Alba; Wieczorowska-Tobis, Katarzyna. (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      This paper focuses on three areas: the first is a review of current knowledge about social and service robots for elderly care. The second is an optimization conceptual model aimed at maximizing the efficiency of assigning ...
    • Robust active damping strategy for DFIG wind turbines 

      Rosado Galparsoro, Leyre Upna Orcid; Samanes Pascual, Javier Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; López Taberna, Jesús Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      Doubly fed induction generators (DFIGs) with an LCL filter are widely used for wind power generation. In these energy conversion systems, there is an interaction between the grid-side converter (GSC) and the rotor-side ...
    • Robust design of 3D-printed W-band bandpass filters using gap waveguide technology 

      Santiago Arriazu, David; Tamayo-Domínguez, Adrián; Gómez Laso, Miguel Ángel Upna Orcid; Lopetegui Beregaña, José María; Fernández-González, José Manuel; Martínez, Ramón; Arregui Padilla, Iván Upna Orcid (Springer, 2022)   Artículo / Artikulua  OpenAccess
      In this paper, a W-band 3D-printed bandpass filter is proposed. The use of higher-order TE10n modes in groove gap waveguide (GGW) technology is evaluated in order to alleviate the manufacturing requirements. In addition ...
    • Route towards a label-free optical waveguide sensing platform based on lossy mode resonances 

      Ruiz Zamarreño, Carlos Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Ozcariz Celaya, Aritz Upna Orcid; Elosúa Aguado, César Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Urrutia Azcona, Aitor Upna Orcid; López Torres, Diego Upna Orcid; Acha Morrás, Nerea de Upna Orcid; Ascorbe Muruzabal, Joaquín Upna Orcid; Vitoria Pascual, Ignacio Upna Orcid; Imas González, José Javier Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Del Villar, Ignacio Upna Orcid (IFSA Publishing, 2019)   Artículo / Artikulua  OpenAccess
      According to recent market studies of the North American company Allied Market Research, the field of photonic sensors is an emerging strategic field for the following years and it is expected to garner $18 billion by ...
    • Safely learning intensive care unit management by using a management flight simulator 

      García de Vicuña Bilbao, Daniel Upna Orcid; Esparza, Laida; Mallor Giménez, Fermín Upna Orcid (Elsevier, 2020)   Artículo / Artikulua  OpenAccess
      This paper presents the development of the first management flight simulator of an intensive care unit (ICU). It allows analyzing the physician decision-making related to the admission and discharge of patients and it can ...
    • Selecting freight transportation modes in last-mile urban distribution in Pamplona (Spain): an option for drone delivery in smart cities 

      Serrano Hernández, Adrián Upna Orcid; Ballano Biurrun, Aitor; Faulín Fajardo, Javier Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Urban distribution in medium-sized cities faces a major challenge, mainly when deliveries are difficult in the city center due to: an increase of e-commerce, weak public transportation system, and the promotion of urban ...
    • Selective harmonic mitigation: limitations of classical control strategies and benefits of model predictive control 

      Rosado Galparsoro, Leyre Upna Orcid; Samanes Pascual, Javier Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; López Taberna, Jesús Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      Selective harmonic mitigation pulsewidth modulation (SHMPWM) combined with model predictive control (MPC) is a promising approach for grid-connected power converters. SHMPWM can guarantee grid code compliance in steady ...
    • Self-referenced optical fiber sensor based on LSPR generated by gold and silver nanoparticles embedded in layer-by-layer nanostructured coatings 

      Martínez Hernández, María Elena Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Sandúa Fernández, Xabier; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      In this work, an optical fiber sensor based on the localized surface plasmon resonance (LSPR) phenomenon has been designed for the detection of two different chemical species (mercury and hydrogen peroxide) by using ...
    • Self-referenced optical fiber sensor for hydrogen peroxide detection based on LSPR of metallic nanoparticles in layer-by-layer films 

      Goicoechea Fernández, Javier Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Sada Oreja, Samuel; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2019)   Artículo / Artikulua  OpenAccess
      Intensity-based optical fiber sensors are one of the most studied sensor approaches thanks to their simplicity and low cost. Nevertheless, their main issue is their lack of robustness since any light source fluctuation, ...
    • Sensitivity enhancement in a multimode interference-based SMS fibre structure coated with a thin-film: theoretical and experimental study 

      Socorro Leránoz, Abián Bentor Upna Orcid; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2014)   Artículo / Artikulua
    • Sensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reduction 

      Del Villar, Ignacio Upna Orcid; Partridge, Matthew; Rodríguez Rodríguez, Wenceslao Eduardo; Fuentes Lorenzo, Omar Upna; Socorro Leránoz, Abián Bentor Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Corres Sanz, Jesús María Upna Orcid; James, Stephen; Tatam, Ralph (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor ...

      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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