Now showing items 1-20 of 373

    • 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 ...
    • 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 ...
    • 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 ...
    • Investigation of direct contact membrane distillation coupling with a concentrated photovoltaic solar system 

      Krnac, Andrew; Araiz Vega, Miguel Upna; Rana, Sohel; Velardo, Jason; Date, Abhijit (Elsevier, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The scarcity of fresh water amongst a growing population is an impending global issue, which must be addressed by utilizing renewable energy sources. A Concentrated Photovoltaic (CPV) and Direct Contact Membrane Distillation ...
    • Holistic architecture for music education: a proposal for empirical research in educational situations 

      Ángel Alvarado, Rolando Alfredo; Wilhelmi, Miguel R. 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 ...
    • Using modelling techniques to analyze urban freight distribution. A case study in Pamplona (Spain) 

      Álvarez, Pablo; Serrano Hernández, Adrián; Faulín Fajardo, Javier Upna; Juan, Ángel Alejandro (Elsevier, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The city of Pamplona, in Spain, is currently experiencing several changes regarding sustainable mobility such as pedestrianization of some streets in the city center, and access control to the Old Town for motor vehicles ...
    • 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 ...
    • 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 ...
    • 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 ...
    • KISS methodologies for network management and anomaly detection 

      Vega, Carlos; Aracil Rico, Javier Upna; Magaña Lizarrondo, Eduardo Upna (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena
      Current networks are increasingly growing in size, complexity and the amount of monitoring data that they produce, which requires complex data analysis pipelines to handle data collection, centralization and analysis tasks. ...
    • Design exploration prior to blade multi-disciplinary optimisation 

      Echeverría, Fernando; Mallor Giménez, Fermín Upna; San-Miguel, Unai (IOP Publishing, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The approach of designing blades as a multi-disciplinary, holistic optimisation implies significant challenges owing to the high complexity of the involved factors such as aerodynamics, elasticity, controller and loads. ...
    • Learning fuzzy measures for aggregation in fuzzy rule-based models 

      Saleh, Emran; Valls Aida; Moreno, Antonio Upna; Romero-Aroca, Pedro; Torra, Vicenç; Bustince Sola, Humberto Upna (Springer Verlag, 2018)   Contribución a congreso / Biltzarrerako ekarpena
      Fuzzy measures are used to express background knowledge of the information sources. In fuzzy rule-based models, the rule confidence gives an important information about the final classes and their relevance. This work ...
    • Folded Cascode OTA with 5540 MHzpF/mA FoM 

      Garde Luque, María Pilar; López Martín, Antonio Upna; Carvajal, Ramón G.; Ramírez-Angulo, Jaime (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A micropower single-stage folded cascode amplifier able to drive a wide range of capacitive loads is presented. It features class AB operation and includes power-efficient adaptive biasing techniques, which provide enhanced ...
    • On the optimal current followers for wide-swing current-efficient amplifiers 

      López Martín, Antonio Upna; Garde Luque, María Pilar; Carvajal, Ramón G.; Ramírez-Angulo, Jaime (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The design of various current followers for the implementation of OTAs with high slew rate and current efficiency is addressed. Two basic current follower topologies are compared, and modifications of both followers to ...
    • 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 ...
    • The nursing and the stigma 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 ...
    • 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 ...
    • Ultra-long (275 km) random distributed feedback fiber laser for remote sensor monitoring 

      Miguel Soto, Verónica de; Leandro González, Daniel Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
      An interferometric sensor located 275 km away from the monitoring station has been interrogated by a double-pumped random distributed feedback fiber laser, reaching the longest distance in fiber optic remote sensing reported ...
    • High sensitivity fiber-optic liquid level sensor using biconical tapered fibers 

      Júdez Colorado, Aitor; Leandro González, Daniel Upna; Pérez Herrera, Rosa Ana Upna; Galarza Galarza, Marko; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A liquid level sensor is presented using a biconical tapered standard single-mode fiber, being its main characteristic an outstanding sensitivity for a low cost transducer. Temperature compensation is enabled with the same ...