Envíos recientes

  • Contribución al desarrollo de refractómetros de fibra óptica basados en resonancias de modos con pérdidas 

    Sánchez Zábal, Pedro (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    El desarrollo de nuevos materiales y métodos de deposición a escala nanométrica ha supuesto una auténtica revolución en muchas disciplinas de la investigación. En particular, los recubrimientos nanoestructurados permiten ...
  • Metamaterials and extraordinary transmission structures applied to microwave, millimeter and terahertz waves devices 

    Rodríguez Ulibarri, Pablo Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    Los metamateriales aparecen en los primeros años del siglo XXI como materiales artificiales que presentan un comportamiento electromagnético de alguna manera exótico. Al mismo tiempo, se descubre un nuevo fenómeno ...
  • Non-negative matrix decomposition for single-channel source separation in biomedical signal processing applications 

    Niegowski, Maciej Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    La separación de fuentes en el procesamiento de señales digitales, consiste en encontrar las mejores aproximaciones de las componentes de una mezcla de señales. Aunque en la mayoría de los casos no se dispone de antemano ...
  • Contribution to the development of distributed fiber optic sensors based on stimulated Brillouin scattering 

    Zornoza Indart, Ander (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
    Fiber optic sensors are becoming a disruptive technology in monitoring integrity of structures. Their low loss, electromagnetic immunity, remote sensing possibilities, multiplexing possibilities and light weight are very ...
  • Synthesis and design of novel metamaterial radiation structures 

    Ortiz Pérez de Eulate, Noelia Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    The present thesis deals with the design and practical implementation of novel netamaterial planar antenna structures based on Complementary Split Ring Resonator (CSRR) particles. As CSRR particles display a very attractive ...
  • Application of visual hyperacuity to imaging and antenna systems 

    Lagunas Tabar, Adur Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    El Sistema Visual Humano es capaz de llevar a cabo múltiples tareas, tales como enfocar objetos a diferentes distancias u obtener imágenes con un amplio rango dinámico. Sin embargo, la función más impresionante está ...
  • Electronic model-driven health computing platforms in the management of chronicity: contributions to integration and harmonization of e-health standards and modelling efficient eophthalmology services 

    Eguzkitza Diego, Aitor (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
    En general, los servicios de salud se diseñan para tratar episodios agudos, mientras que las enfermedades crónicas consumen cerca del 80% del presupuesto de los servicios nacionales de salud debido a una gestión subóptima ...
  • 77-GHz high-gain bull’s-eye antenna with sinusoidal profile 

    Beaskoetxea Gartzia, Unai Upna; Pacheco Peña, Víctor Upna; Orazbayev, Bakhtiyar Upna; Akalin, Tahsin; Maci, Stefano; Navarro Cía, Miguel Upna (IEEE, 2015)   Artículo / Artikulua  OpenAccess
    A high-gain Bull’s-Eye leaky-wave horn antenna working at 77 GHz with sinusoidal profile has been designed, fabricated, and experimentally measured. The influence of the number of periods on the gain and beamwidth is ...
  • Leaky wave antennas, plasmonics and metamaterials in the terahertz 

    Beaskoetxea Gartzia, Unai Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    La demostración del fenómeno de EOT en el rango de las milimétricas y las microondas y la presentación de la antena BE de onda de fuga en [53], propició el desarrollo de diversas antenas BE corrugadas, cada una de ellas ...
  • Contributions to Head Pose Estimation methods 

    Ariz Galilea, Mikel Upna (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
    Head Pose Estimation (HPE) is currently a growing research field, mainly because of the proliferation of human-computer interfaces (HCI) in the last decade. It offers a wide variety of applications, including driver ...
  • Diseño y aplicaciones de un elemento activo universal 

    Cabeza Laguna, Rafael Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 1996)   Tesis doctoral / Doktoretza tesia  OpenAccess
    La lista de elementos activos presentes en el comienzo de la década de los noventa es numerosa y no exenta de repeticiones o conceptos poco útiles. Por otra parte no se presenta en la literatura ningún esfuerzo a la hora ...
  • Analysis, characterization and modeling of interference sources on wireless communication systems in complex indoor scenarios 

    López Iturri, Peio Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    This research work presents a novel methodology of assessing wireless interferences on Wireless Sensor Networks (WSN) by the aid of an in-house developed 3D Ray Launching method, which is a novel deterministic approach ...
  • Development of ultrathin metasurface and partially reflective surface antennas for space applications 

    Tellechea Pereda, Amagoia Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
    La industria espacial ha estado siempre muy interesada en la evolución de las antenas que se integran en los satélites. Se buscan soluciones que además de ser ligeras y compactas, tengan un coste reducido. De esta forma ...
  • Temperature sensor based on a hybrid ITOsilica resonant cavity 

    Socorro Leránoz, Abián Bentor Upna; Soltani, Soheil; Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Armani, Andrea M. (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
    Integrated optical devices comprised of multiple material systems are able to achieve unique performance characteristics, enabling applications in sensing and in telecommunications. Due to ease of fabrication, the majority ...
  • Fiber-optic lossy mode resonance sensors 

    Arregui San Martín, Francisco Javier Upna; Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Goicoechea Fernández, Javier Upna; Ruiz Zamarreño, Carlos Upna; Elosúa Aguado, César Upna; Hernáez Sáenz de Zaitigui, Miguel Upna; Rivero Fuente, Pedro José Upna; Socorro Leránoz, Abián Bentor Upna; Urrutia Azcona, Aitor Upna; Sánchez Zábal, Pedro Upna; Zubiate, Pablo; López Torres, Diego Upna; Acha Morrás, Nerea de Upna; Matías Maestro, Ignacio Upna (Elsevier, 2014)   Contribución a Congreso / Biltzarrerako ekarpena  OpenAccess
    In the last 4 years, experimental evidences about the potential use of optical sensors based on Lossy Mode Resonances (LMR) have been presented in the literature. These LMR sensors have some similarities with Surface ...
  • Nanodeposition of materials with complex refractive index in long period fiber gratings 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Achaerandio, Miguel Upna (IEEE, 2005)   Artículo / Artikulua  OpenAccess
    An overlay of higher refractive index than the cladding is deposited on a Long Period Fiber Grating (LPFG). This permits to improve in a great manner the sensitivity of the device to ambient and overlay refractive index ...
  • ESA-based in-fiber nanocavity for hydrogen–peroxide detection 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Claus, Richard O. (IEEE, 2005)   Artículo / Artikulua  OpenAccess
    A fiber-optic sensor sensitive to hydrogen peroxide has been designed based on the electrostatic layer-by-layer selfassembly method. Prussian blue has been deposited in a polymeric structure formed by Poly(allylamine ...
  • Enhancement of sensitivity in long period fiber gratings with deposition of low refractive index materials 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
    It was proved [Opt. Lett. 30, 720 (2005)] that the deposition of an overlay of higher refractive index than that of the cladding on a long-period fiber grating (LPFG) causes large shifts in the attenuation bands induced by ...
  • Deposition of an overlay with electrostactic self-assembly method in long period fiber gratings 

    Del Villar, Ignacio Upna; Achaerandio, Miguel Upna; Matias, Ignacio R.; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
    It was proved that the deposition of an overlay material onto a long-period fiber grating causes important shifts in the wavelengths of the typical attenuation bands that are caused by coupling between cladding and core ...
  • Influence in cladding mode distribution of overlay deposition on long-period fiber gratings 

    Del Villar, Ignacio Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna (Optical Society of America, 2006)   Artículo / Artikulua  OpenAccess
    A thin overlay of higher refractive index than that of the cladding of a long-period fiber grating induces in cladding modes strong variations in effective index, mode profile, cross-coupling coefficient with the core ...

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