Now showing items 62-81 of 292

    • ECOAL project: delivering solutions for integrated monitoring of coal-related fires supported on optical fiber sensing technology 

      Ribeiro, Joana; Viveiros, Duarte; Ferreira, João; López Gil, Alexia; Domínguez López, Alejandro; Martins, Hugo F.; Pérez Herrera, Rosa Ana Upna; López Aldaba, Aitor Upna; Duarte, Lia; Rodrigues Pinto, Ana Margarida Upna; Martín López, Sonia; Baierl, Hardy; Jamier, Raphael; Rougier, Sébastien; Auguste, Jean-Louis; Teodoro, Ana Cláudia; Gonçalves, José Alberto; Esteban, Óscar; Santos, José Luís; Roy, Philippe; López-Amo Sáinz, Manuel Upna; González Herráez, Miguel; Baptista, José Manuel; Flores, Deolinda (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The combustion of coal wastes resulting from mining is of particular environmental concern, and the importance of proper management involving real-time assessment of their status and identification of probable evolution ...
    • Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles 

      Rivero Fuente, Pedro José Upna; Goicoechea Fernández, Javier Upna; Urrutia Azcona, Aitor Upna; Arregui San Martín, Francisco Javier Upna (Springer, 2013)   Artículo / Artikulua  OpenAccess
      In this paper, the influence of variable molar ratios between reducing and loading agents (1:100, 1:50, 1:20, 1:10, 1:5, 1:2, 1:1, 2:1) and between protective and loading agents (0.3:1, 0.75:1, 1.5:1, 3:1, 7.5:1, 30:1, ...
    • Effect of the glottal source and the vocal tract on the partials amplitude of vibrato in male voices 

      Arroabarren Alemán, Ixone Upna; Carlosena García, Alfonso Upna (Acoustical Society of America, 2006)   Artículo / Artikulua  OpenAccess
      In this paper the production of vocal vibrato is investigated. The most relevant features of the acoustical vibrato signal, frequency and amplitude variations of the partials, will be related to the voice production ...
    • Effects of pump pulse extinction ratio in Brillouin optical time-domain analysis sensors 

      Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Feng, Cheng; Urricelqui Polvorinos, Javier Upna; Schneider, Thomas; Loayssa Lara, Alayn Upna (Optical Society of America, 2017)   Artículo / Artikulua  OpenAccess
      We report on two previously unknown non-local effects that have been found to impair Brillouin optical time-domain analysis (BOTDA) sensors that deploy limited extinction ratio (ER) pump pulses. The first one originates ...
    • Electroinductive waves in chain of complementary metamaterial elements 

      Beruete Díaz, Miguel Upna; Falcone Lanas, Francisco Javier Upna; Freire, M. J.; Marqués, R.; Baena, J.D. (AIP Publishing, 2006)   Artículo / Artikulua  OpenAccess
      Electronductive waves supported by chains of resonators drilled on a metallic plate are presented. Propagation of energy comes as a consequence of the electric coupling between these resonators. Therefore, these waves ...
    • Electroinductive waves role in left-handed stacked complementary split rings resonators 

      Beruete Díaz, Miguel Upna; Aznabet, Mariem; Navarro Cía, Miguel Upna; El Mrabet, O.; Falcone Lanas, Francisco Javier Upna; Aknin, N.; Essaaidi, M.; Sorolla Ayza, Mario Upna (Optical Society of America, 2009)   Artículo / Artikulua  OpenAccess
      In this letter it is presented a Left-Handed Metamaterial design route based upon stacked arrays of screens made of complementary split rings resonators under normal incidence in the microwave regime. Computation of ...
    • Electromagnetic cloaking with canonical spiral inclusions 

      Guven, K.; Sáenz Sáinz, Elena Upna; Gonzalo García, Ramón Upna; Ozbay, Ekmel; Tretyakov, Sergei A. (IOP Publishing Ltd., 2008)   Artículo / Artikulua  OpenAccess
      We report an electromagnetic cloaking structure that is composed of identical canonical spiral particles. By using the Clausius-Mosotti formula, the electric and magnetic polarizabilities of a single spiral particle are ...
    • Electromangetic force density in electrically and magnetically polarizable media 

      Liberal Olleta, Íñigo Upna; Ederra Urzainqui, Íñigo Upna; Gonzalo García, Ramón Upna; Ziolkowski, Richard W. (American Physical Society, 2013)   Artículo / Artikulua  OpenAccess
      The force density induced by electromagnetic fields in electrically and magnetically polarizable media is studied analytically. Different formulations of the force density as a function of field-related quantities, ...
    • Electromyographic, cerebral, and muscle hemodynamic responses during intermittent, isometric contractions of the biceps brachii at three submaximal intensities 

      Bhambhani, Yagesh; Fan, Jui Lin; Place, Nicolas; Rodríguez Falces, Javier Upna; Kayser, Bengt (Frontiers Media, 2014)   Artículo / Artikulua  OpenAccess
      This study examined the electromyographic, cerebral and muscle hemodynamic responses during intermittent isometric contractions of biceps brachii at 20, 40, and 60% of maximal voluntary contraction (MVC). Eleven volunteers ...
    • Enabling personal privacy for pervasive computing environments 

      Alcalde Bagüés, Susana Upna; Zeidler, Andreas; Klein, Cornel; Fernández Valdivielso, Carlos Upna; Matías Maestro, Ignacio Upna (Graz University of Technology, IICM, 2010)   Artículo / Artikulua  OpenAccess
      Protection of personal data in the Internet is already a challenge today. Users have to actively look up privacy policies of websites and decide whether they can live with the terms of use. Once discovered, they are ...
    • Energy management strategy for a battery-diesel stand-alone system with distributed PV generation based on grid frequency modulation 

      Urtasun Erburu, Andoni Upna; Sanchis Gúrpide, Pablo Upna; Barricarte Rivas, David; Marroyo Palomo, Luis Upna (Elsevier, 2014)   Artículo / Artikulua  OpenAccess
      A hybrid PV-Battery-Diesel configuration is very attractive for stand-alone systems in terms of cost and reliability. In many applications, the battery and the diesel generator are centralized and generate the AC grid while ...
    • 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 ...
    • Enhancement of the dynamic range in slope-assisted coherent brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna; Urricelqui Polvorinos, Javier Upna; Loayssa Lara, Alayn Upna (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      We present two techniques that provide an extension of the dynamic range of coherent Brillouin optical time-domain analysis (BOTDA) sensors for dynamic measurements. This type of BOTDA sensors rely on self-heterodyne ...
    • eOftalmología: estado actual y tendencias futuras 

      Andonegui Navarro, José; Serrano Arriezu, Luis Javier Upna; Eguzkiza Diego, Aitor Upna (Gobierno de Navarra, 2010)   Artículo / Artikulua  OpenAccess
      La eSalud se puede definir como el uso de las tecnologías de la información y las comunicaciones para proporcionar o apoyar un diverso grupo de actividades relacionadas con la atención en salud. Si este concepto se ...
    • Epsilon-near-zero metalenses operating in the visible 

      Pacheco Peña, Víctor Upna; Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Several converging lenses working in the permittivity near to zero (ENZ) regime at optical frequencies are designed using an array of metal-dielectric-metal plasmonic waveguides. These plasmonic waveguides show a dispersive ...
    • 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 ...
    • Estimation of radiofrequency power leakage from microwave ovens for dosimetric assessment at nonionizing radiation exposure levels 

      López Iturri, Peio Upna; Miguel Bilbao, Silvia de; Aguirre Gallego, Erik Upna; Azpilicueta Fernández de las Heras, Leyre Upna; Falcone Lanas, Francisco Javier Upna; Ramos González, Victoria (Hindawi, 2015)   Artículo / Artikulua  OpenAccess
      The electromagnetic field leakage levels of nonionizing radiation from a microwave oven have been estimated within a complex indoor scenario. By employing a hybrid simulation technique, based on coupling full wave simulation ...
    • Etched LPFGs in reflective configuration for sensitivity and attenuation band depth increase 

      Del Villar, Ignacio Upna; Socorro Leránoz, Abián Bentor Upna; Corres Sanz, Jesús María Upna; Matías Maestro, Ignacio Upna; Cruz, José Luis; Rego, Gaspar (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      A reflection configuration setup for long-period fiber gratings is presented. It permits to obtain a unique band with attenuation double than that obtained in transmission configuration, which is interesting for ...
    • Evaluation of deployment challenges of wireless sensor networks at signalized intersections 

      Azpilicueta Fernández de las Heras, Leyre Upna; López Iturri, Peio Upna; Aguirre Gallego, Erik Upna; Martínez Carrasco, Carlos; Astrain Escola, José Javier Upna; Villadangos Alonso, Jesús Upna; Falcone Lanas, Francisco Javier Upna (MDPI, 2016)   Artículo / Artikulua  OpenAccess
      With the growing demand of Intelligent Transportation Systems (ITS) for safer and more efficient transportation, research on and development of such vehicular communication systems have increased considerably in the last ...
    • Evaluation of electromagnetic dosimetry of wireless systems in complex indoor scenarios with human body interaction 

      Aguirre Gallego, Erik Upna; Arpón Díaz-Aldagalán, Javier; Azpilicueta Fernández de las Heras, Leyre Upna; Ramos González, Victoria; Falcone Lanas, Francisco Javier Upna (EMW Publishing, 2012)   Artículo / Artikulua  OpenAccess
      In this work, the influence of human body within the estimation of dosimetric values is analyzed. A simplified human body model, including the dispersive nature of material parameters of internal organs, skin, muscle, bones ...