Recent Submissions

  • Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities 

    Pérez Herrera, Rosa Ana Upna; Novais, S.; Bravo Acha, Mikel Upna; Leandro González, Daniel Upna; Silva, Susana; Frazão, Orlando; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work we demonstrate the multiplexing capability of new optical fiber Fabry-Perot interferometers based on airmicrocavities using a commercial FBG interrogator. Three optimized air-microcavity interferometer sensors ...
  • Micro-drilled optical fiber for enhanced laser strain sensors 

    Pérez Herrera, Rosa Ana Upna; Bravo Acha, Mikel Upna; Roldán Varona, Pablo; Leandro González, Daniel Upna; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ...
  • Polyaniline deposition on tilted fiber Bragg grating for pH sensing 

    López Aldaba, Aitor Upna; González Vila, Á.; Debliquy, M.; López-Amo Sáinz, Manuel Upna; Caucheteur, C.; Lahem, D. (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, we present the results of a new pH sensor based on a polyaniline (PAni) coating on the surface of a tilted fiber Bragg grating. The pH-sensitive PAni was deposited by in situ chemical oxidative polymerization. ...
  • Optical power-based interrogation of plasmonic tilted fiber Bragg grating biosensors 

    González Vila, Á.; López Aldaba, Aitor Upna; Kinet, D.; Mégret, P.; López-Amo Sáinz, Manuel Upna; Caucheteur, C. (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Two interrogation techniques for plasmonic tilted fiber Bragg grating sensors are reported and experimentally tested. Typical interrogation methods are usually based on tracking the wavelength shift of the most sensitive ...
  • Watt-level green random laser at 532  nm by SHG of Yb-doped fiber laser 

    Rota Rodrigo, Sergio Upna; Gouhier, B.; Dixneuf, C.; Antoni Micollier, L.; Guiraud, G.; Leandro González, Daniel Upna; López-Amo Sáinz, Manuel Upna; Traynor, N.; Santarelli, G. (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
    We have developed a Watt-level random laser at 532 nm. The laser is based on a 1064 nm random distributed ytterbium-gain assisted fiber laser seed with a 0.35 nm line-width and 900 mW polarized output power. A study for ...
  • Engineers and scientists as commercial agents of the Spanish nuclear programme 

    Torre Campo, Joseba de la Upna; Rubio Varas, María del Mar Upna; Sanz Lafuente, María Gloria Upna (Palgrave Macmillan, 2018)   Capítulo de libro / Liburuen kapitulua  OpenAccess
    We aim at analysing the role of engineers and scientists as agents of economic modernization in Spain, which at the time was an underdeveloped economy ruled by an authoritarian regime.
  • Study on isolation improvement between closely-packed patch antenna arrays based on fractal metamaterial electromagnetic bandgap structures 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Ali, Abdul; Hussein Ali, Ammar; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (Institution of Engineering and Technology, 2018)   Artículo / Artikulua  OpenAccess
    A decoupling metamaterial (MTM) configuration based on fractal electromagnetic-bandgap (EMBG) structure is shown to significantly enhance isolation between transmitting and receiving antenna elements in a closely-packed ...
  • ENSO and NAO affect long-term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods 

    González de Andrés, Ester Upna; Blanco Vaca, Juan Antonio Upna; Imbert Rodríguez, Bosco Upna; Guan, Biing T.; Lo, Yueh-Hsin Upna; Castillo Martínez, Federico Upna (Wiley, 2019)   Artículo / Artikulua
    Litterfall dynamics (production, seasonality and nutrient composition) are key factors influencing nutrient cycling. Leaf litter characteristics are modified by species composition, site conditions and water availability. ...
  • Study on antenna mutual coupling suppression using integrated metasurface isolator for SAR and MIMO applications 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Andujar, A.; Anguera, J.; Limiti, Ernesto (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    A metasurface based decoupling structure that is composed of a square-wave slot pattern with exaggerated corners that is implemented on a rectangular microstrip provides high-isolation between adjacent patch antennas for ...
  • Mutual-coupling reduction in metamaterial substrate integrated waveguide slotted antenna arrays using metal fence isolators for SAR and MIMO applications 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    A new type of mutual coupling reduction technique is applied to metamaterial substrate integrated waveguide (SIW) slotted antenna array. The circular shaped reference SIW antenna array is constructed from Alumina substrate ...
  • Interaction between closely packed array antenna elements using meta-surface for applications such as MIMO systems and synthetic aperture radars 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; See, Chan H.; Abd-Alhameed, Raed; Khalily, Mohsen; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (Wiley, 2018)   Artículo / Artikulua  OpenAccess
    The paper presents a technique to enhance the isolation between adjacent radiating elements that is common in densely packed antenna arrays. Such antennas provide frequency beam-scanning capability needed in multiple-input ...
  • A new waveguide slot array antenna with high isolation and high antenna bandwidth operation on Ku- and K- Bands for radar and MIMO systems 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Limiti, Ernesto; Falcone Lanas, Francisco Javier Upna (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper a novel technique is proposed to reduce the mutual coupling between the radiating elements of a waveguide slot array antenna. This is achieved by inserting slots between the waveguide oval shaped slots. The ...
  • Antenna mutual coupling suppression over wideband using embedded periphery slot for antenna arrays 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; See, Chan H.; Abd-Alhameed, Raed; Khalily, Mohsen; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (MDPI, 2018)   Artículo / Artikulua  OpenAccess
    This paper presents a new approach to suppress interference between neighbouring radiating elements resulting from surface wave currents. The proposed technique will enable the realization of low-profile implementation of ...
  • Multi-scale approach to forest functioning of Pinus sylvestris L. and Fagus sylvatica L. mixtures of the Pyrenees under global change 

    González de Andrés, Ester Upna (2018)   Tesis doctoral / Doktoretza tesia
    Hoy en día, los bosques mixtos son cada vez más reconocidos como superiores a los bosques puros en cuanto a la provisión de una completa gama de bienes y servicios ecosistémicos. La gestión de los bosques en una condición ...
  • Novel blaROB-1-bearing plasmid conferring resistance to β-lactams in Haemophilus parasuis isolates from healthy weaning pigs 

    Moleres Apilluelo, Javier; Santos López, Alfonso; Lázaro, Isidro; Labairu, Javier; Prat, Cristina; Ardanuy, Carmen; González Zorn, Bruno; Aragon, Virginia; Garmendia García, Juncal (American Society for Microbiology, 2015)   Artículo / Artikulua  OpenAccess
    Haemophilus parasuis, the causative agent of Glässer’s disease, is one of the early colonizers of the nasal mucosa of piglets. It is prevalent in swine herds, and lesions associated with disease are fibrinous polyserositis ...
  • Tunable deflection and asymmetric transmission of THz waves using a thin slab of graphene-dielectric metamaterial, with and without ENZ components 

    Serebryannikov, Andriy E.; Hajian, Hodjat; Beruete Díaz, Miguel Upna; Ozbay, Ekmel; Vandenbosch, Guy A. E. (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
    Tunable deflection of obliquely incident, linearly polarized terahertz waves is theoretically studied in a wide frequency range around 20 THz, by combining a thin slab of graphene-dielectric metamaterial (with ten layers ...
  • The effect of flooding on mental health: lessons learned for building resilience 

    Foudi, Sébastien; Osés Eraso, Nuria Upna; Galarraga, Ibon (American Geophysical UnionWiley, 2017)   Artículo / Artikulua  OpenAccess
    Risk management and climate adaptation literature focuses mainly on reducing the impacts of, exposure to, and vulnerability to extreme events such as floods and droughts. Posttraumatic stress disorder is one of the most ...
  • Determinants and tools to evaluate the ecological sustainability of using forest biomass as an alternative energy source 

    Blanco Vaca, Juan Antonio Upna; Candel-Pérez, David Upna; Lo, Yueh-Hsin Upna (2018)   Capítulo de libro / Liburuen kapitulua  OpenAccess
    Forest biomass, the most ancient of fuels, is again in the center of renewable energy production. This chapter provides an introductory view of the main factors that condition the ecological sustainability of this energy ...
  • Coupled biomechanical response of the cornea assessed by non-contact tonometry. A simulation study 

    Ariza Gracia, Miguel A.; Zurita Gabasa, Jesús; Piñero, David P.; Rodríguez Matas, José F.; Calvo, Begoña (Public Library of Science, 2015)   Artículo / Artikulua  OpenAccess
    The mechanical response of the cornea subjected to a non-contact air-jet tonometry diagnostic test represents an interplay between its geometry, the corneal material behavior and the loading. The objective is to study ...
  • Opening Pandora's box: cause and impact of errors on plant pigment studies 

    Fernández Marín, Beatriz; Artetxe, Unai; Barrutia, Oihana; Esteban Terradillos, Raquel; Hernández, Antonio; García Plazaola, José Ignacio (Frontiers Media, 2015)   Artículo / Artikulua  OpenAccess
    Today, there is an astonishing volume of scientific information available for researchers, which can be easily accessed through powerful search tools. Yet, the question now is whether all this vast amount of information ...

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