Now showing items 1-20 of 344

    • Latest research on long-range Brillouin distributed sensing 

      Loayssa Lara, Alayn Upna; Urricelqui Polvorinos, Javier Upna; Iribas Pardo, Haritz Upna; Mariñelarena Ollacarizqueta, Jon Upna; Mompó Roselló, Juan José Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We review the latest developments in long-range Brillouin optical time-domain analysis sensors. The factors that impair the performance of these sensors, particularly in terms of their distance range, are discussed together ...
    • Dual-probe linearly-configured BOCDA system with enlarged modulation amplitude 

      Mariñelarena Ollacarizqueta, Jon Upna; Kim, Yong Hyun; Loayssa Lara, Alayn Upna; Song, Kwang Yong (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We present and experimentally demonstrated a linearly-configured Brillouin optical correlation domain analysis (LC-BOCDA) system that allows large modulation amplitude (Δf) based on a dual probe wave and the control of ...
    • Healthcare professionals face the immanence of death embedded in scientific progress and the digital revolution 

      García-Orellán, Rosa Upna (2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Healthcare professionals como face to face with death as part of their daily routine. This happens in emergencies; but it also airses as life is ending, when palliative care is the only tratment thar remains available for ...
    • The nursing and the stigma of of palliative care in oncology units 

      Ochoa Tamayo, Diana; García-Orellán, Rosa Upna (2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In the services of Oncology and in the advanced stages of the disease,the fact of passing from the treatment to the palliative process entails difficult situations,both for patients and for health professionals. Because ...
    • 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 ...
    • 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 ...
    • Holistic architecture for music education: a proposal for empirical research in educational situations 

      Ángel Alvarado, Rolando Alfredo; Rodríguez Wilhelmi, Miguel Upna; Belletich Ruiz, Olga Upna (Universitat Politècnica de València, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Holistic Architecture for Music Education (HAME) arises as a Design-Based Research, that is, it is an interdisciplinary research approach based on mixed research methods, which attempts understanding empirical phenomena ...
    • Angle-susceptible sensing metasurface in terahertz regime 

      Nikolaev, Nazar A.; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna (EDP Sciences, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Nowadays thin-film coatings and structures are widely used in advanced industrial and scientific ap-plications that makes the tasks of thin-film sensing highly demanded in practice. Last decade, stimulated by progress in ...
    • Enhancement of signal-to-noise ratio in Brillouin optical time domain analyzers by dual-probe detection 

      Iribas Pardo, Haritz Upna; Loayssa Lara, Alayn Upna; Sauser, Florian; Llera, Miguel; Le Floch, Sébastien (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate a simple technique to enhance the signal-to-noise ratio (SNR) in Brillouin optical time-domain analysis sensors by the addition of gain and loss processes. The technique is based on the shift of the pump ...
    • Brillouin optical time-domain analyzer for extended sensing range using probe dithering and cyclic coding 

      Iribas Pardo, Haritz Upna; Loayssa Lara, Alayn Upna; Sauser, Florian; Llera, Miguel; Le Floch, Sébastien (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We present an enhanced performance Brillouin optical time-domain analysis sensor that uses dual probes waves with optical frequency modulation and cyclic coding. The frequency modulation serves to increase the probe power ...
    • Characterization of near-ground radio propagation channel for wireless sensor network with application in smart agriculture 

      Klaina, Hicham; Alejos, Ana; Aghzout, Otman; Falcone Lanas, Francisco Javier Upna (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this contribution, we present a narrowband radio channel model for a scenario wherein the radio link operates under near-ground conditions, occurring on a ZigBee wireless sensor networks applied to smart agriculture. ...
    • Attitudes and perceptions towards cultural diversity and interculturality in the university context. A comparative study 

      Peñalva Vélez, Alicia Upna; Leiva Olivencia, Juan José (Elsevier, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The university context is a privileged space for intercultural training of future professionals in education, a stage where approaching theoretical models and practical, useful and effective strategies to cultivate in the ...
    • The role of adults in children digital literacy 

      Peñalva Vélez, Alicia Upna; Leiva Olivencia, Juan José; Irazábal Zuazua, Itziar (Elsevier, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Collected data from different studies show how users acquire great skills in terms of technology’s use, but they don’t gain such skills in a safe use of technology. The objective of this study is to identify the level of ...
    • Monitoring the etching process in LPFGs towards development of highly sensitive sensors 

      Del Villar, Ignacio Upna; Cruz, José Luis; Socorro Leránoz, Abián Bentor Upna; Díaz Lucas, Silvia Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier Upna; Matías Maestro, Ignacio Upna (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, the monitoring of the etching process up to a diameter of 30 µm of two LPFG structures has been compared, one of them had initially 125 µm, whereas the second one had 80 µm. By tracking the wavelength shift ...
    • Detection of ethanol in human breath using optical fiber long period grating coated with metal-organic frameworks 

      Acha Morrás, Nerea de Upna; Hromadka, Jiri; Tokay, Begum; Correia, Ricardo; Elosúa Aguado, César Upna; Matías Maestro, Ignacio Upna; Arregui San Martín, Francisco Javier Upna; Morgan, Stephen P.; Korposh, Sergiy (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      An optical fiber sensor for ethanol detection in exhaled breath has been developed. It has been fabricated by functionalizing a Long Period Grating with a metal-organic framework, ZIF-8. The sensor’s response was tested ...
    • Title enhancement of the sensitivity of a volatile organic compounds MOF-sensor by means of its structure 

      López Torres, Diego Upna; López Aldaba, Aitor Upna; Elosúa Aguado, César Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we experimentally compare several core structures of Microstructured Optical Fibers (MOFs) for low-finesse Fabry-Pérot (FP) sensors. These sensors are designed for Volatile Organic Compounds (VOCs) measurements. ...
    • Etched and nanocoated SMS fiber sensor for detection of salinity concentration 

      Cardona-Maya, Yamile; Del Villar, Ignacio Upna; Socorro Leránoz, Abián Bentor Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier Upna; Botero-Cadavid, Juan F. (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      An optical fibre refractometer has been developed by etching and deposition of a thin film of indium tin oxide (ITO) on a single-mode-multimode-single-mode (SMS) fibre structure. The interference between modes in this ...
    • La sobreexpresión del gen ALDH7B4 alivia los efectos provocados por herbicidas inhibidores de la biosíntesis de aminoácidos 

      Gil Monreal, Miriam Upna; Zabalza Aznárez, Ana Upna; Missihoun, Tagnon D.; Bartels, Dorothea; Royuela Hernando, Mercedes Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      En este trabajo se ha profundizado en el conocimiento de los efectos fisiológicos provocados por los herbicidas imazamox y glifosato. En concreto, se ha estudiado el papel de la ALDH7B4, aldehído deshidrogenasa, que ...
    • Efecto del glifosato y de diferentes intermediarios metabólicos en la regulación de la ruta del siquimato 

      Zulet González, Ainhoa Upna; Fernández Escalada, Manuel Upna; Gil Monreal, Miriam Upna; Zabalza Aznárez, Ana Upna; Royuela Hernando, Mercedes Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      En este estudio se han abordado los mecanismos de regulación de la ruta del siquimato en la biosíntesis de los aminoácidos aromáticos. Para ello se han comparado el contenido de siquimato y de los enzimas EPSPS ...