Envíos recientes

  • Challenges in wireless system integration as enablers for indoor context aware environments 

    López Iturri, Peio; Aguirre Gallego, Erik; Azpilicueta Fernández de las Heras, Leyre; Astrain Escola, José Javier; Villandangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2017)   Artículo / Artikulua
    The advent of fully interactive environments within Smart Cities and Smart Regions requires the use of multiple wireless systems. In the case of user-device interaction, which finds multiple applications such as Ambient ...
  • Non-local effects in Brillouin optical time-domain analysis sensors 

    Iribas Pardo, Haritz; Urricelqui Polvorinos, Javier; Mompó Roselló, Juan José; Mariñelarena Ollazcarizqueta, Jon; Loayssa Lara, Alayn (MDPI, 2017)   Artículo / Artikulua
    Brillouin optical time-domain analysis (BOTDA) sensors have great potential to provide distributed measurements of temperature and strain over large structures with high spatial resolution and measurement precision. However, ...
  • Spatial characterization of radio propagation channel in urban vehicle-to-infrastructure environments to support WSNs deployment 

    Granda, Fausto; Azpilicueta Fernández de las Heras, Leyre; Vargas Rosales, César; López Iturri, Peio; Aguirre Gallego, Erik; Astrain Escola, José Javier; Villandangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2017)   Artículo / Artikulua
    Vehicular ad hoc Networks (VANETs) enable vehicles to communicate with each other as well as with roadside units (RSUs). Although there is a significant research effort in radio channel modeling focused on vehicle-to-vehicle ...
  • Humidity sensor based on Bragg gratings developed on the end facet of an optical fiber by sputtering of one single material 

    Ascorbe Muruzabal, Joaquín; Corres Sanz , Jesús María; Arregui San Martín, Francisco Javier; Matías Maestro, Ignacio (MDPI, 2017)   Artículo / Artikulua
    The refractive index of sputtered indium oxide nanocoatings has been altered just by changing the sputtering parameters, such as pressure. These induced changes have been exploited for the generation of a grating on the ...
  • Optical fibre sensors using graphene-based materials: a review 

    Hernáez Sáenz de Zaitigui, Miguel; Ruiz Zamarreño, Carlos; Melendi Espina, Sonia; Bird, Liam; Mayes, Andrew; Arregui San Martín, Francisco Javier (MDPI, 2017)   Artículo / Artikulua
    Graphene and its derivatives have become the most explored materials since Novoselov and Geim (Nobel Prize winners for Physics in 2010) achieved its isolation in 2004. The exceptional properties of graphene have attracted ...
  • Implementation and analysis of a wireless sensor network-based pet location monitoring system for domestic scenarios 

    Aguirre Gallego, Erik; López Iturri, Peio; Azpilicueta Fernández de las Heras, Leyre; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Santesteban, Daniel; Falcone Lanas, Francisco Javier (MDPI, 2016)   Congreso / Biltzarra
    The flexibility of new age wireless networks and the variety of sensors to measure a high number of variables, lead to new scenarios where anything can be monitored by small electronic devices, thereby implementing Wireless ...
  • Recent developments in fiber optics humidity sensors 

    Ascorbe Muruzabal, Joaquín; Corres Sanz , Jesús María; Arregui San Martín, Francisco Javier; Matías Maestro, Ignacio (MDPI, 2017)   Artículo / Artikulua
    A wide range of applications such as health, human comfort, agriculture, food processing and storage, and electronic manufacturing, among others, require fast and accurate measurement of humidity. Sensors based on optical ...
  • Evaluation of deployment challenges of wireless sensor networks at signalized intersections 

    Azpilicueta Fernández de las Heras, Leyre; López Iturri, Peio; Aguirre Gallego, Erik; Martínez Carrasco, Carlos; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2016)   Artículo / Artikulua
    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 ...
  • Implementation and analysis of ISM 2.4 GHz wireless sensor network systems in judo training venues 

    López Iturri, Peio; Aguirre Gallego, Erik; Azpilicueta Fernández de las Heras, Leyre; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2016)   Artículo / Artikulua
    In this work, the performance of ISM 2.4 GHz Wireless Sensor Networks (WSNs) deployed in judo training venues is analyzed. Judo is a very popular martial art, which is practiced by thousands of people not only at the ...
  • An analysis matrix for the assessment of smart city technologies: main results of its application 

    Branchi, Pablo Emilio; Fernández Valdivielso, Carlos; Matías Maestro, Ignacio (MDPI, 2017)   Artículo / Artikulua
    The paper presents the main results of a previously developed methodology to better evaluate new technologies in Smart Cities, using a tool to evaluate different systems and technologies regarding their usefulness, considering ...
  • Detection of ethanol in human breath using optical fiber long period grating coated with metal-organic frameworks 

    Acha Morrás, Nerea de; Hromadka, Jiri; Tokay, Begum; Correia, Ricardo; Elosúa Aguado, César; Matías Maestro, Ignacio; Arregui San Martín, Francisco Javier; Morgan, Stephen P.; Korposh, Sergiy (MDPI, 2017)   Congreso / Biltzarra
    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 ...
  • Sensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reduction 

    Villar Fernández, Ignacio del; Partridge, Matthew; Rodríguez, Wenceslao; Fuentes, Omar; Socorro Leránoz, Abián Bentor; Díaz Lucas, Silvia; Corres Sanz, Jesús María; James, Stephen; Tatam, Ralph (MDPI, 2017)   Artículo / Artikulua
    The diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor ...
  • Title enhancement of the sensitivity of a volatile organic compounds MOF-sensor by means of its structure 

    López Torres, Diego; López Aldaba, Aitor; Elosúa Aguado, César; Auguste, Jean L.; Jamier, Rapahel; Roy, Philippe; López-Amo Sáinz, Manuel; Arregui San Martín, Francisco Javier (MDPI, 2017)   Congreso / Biltzarra
    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. ...
  • Monitoring the etching process in LPFGs towards development of highly sensitive sensors 

    Villar Fernández, Ignacio del; Cruz, José Luis; Socorro Leránoz, Abián Bentor; Díaz Lucas, Silvia; Corres Sanz, Jesús María; Arregui San Martín, Francisco Javier; Matías Maestro, Ignacio (MDPI, 2017)   Congreso / Biltzarra
    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 ...
  • Experimental realization of an epsilon-near-zero graded-index metalens at terahertz frequencies 

    Pacheco Peña, Víctor; Engheta, Nader; Kuznetsov, Sergei A.; Gentselev, Alexandr; Beruete Díaz, Miguel (American Physical Society, 2017)   Artículo / Artikulua
    The terahertz band has been historically hindered by the lack of efficient generators and detectors, but a series of recent breakthroughs have helped to effectively close the “terahertz gap.” A rapid development of terahertz ...
  • Mid-infrared spectroscopy (MIR) for simultaneous determination of fat and protein content in meat of several animal species 

    Lozano Saiz, María; Rodríguez Ulibarri, Pablo; Echeverría Morrás, Jesús; Beruete Díaz, Miguel; Sorolla Ayza, Mario; Beriain Apesteguía, María José (Springer, 2017)   Artículo / Artikulua
    The aim of this research was to study the application of MIR spectroscopy as an alternative to conventional methods to determine fat and protein content. Samples of the main species used to produce meat products were ...
  • Wideband backscattering reduction at terahertz using compound reflection grating 

    Orazbayev, Bakhtiyar; Rodríguez Ulibarri, Pablo; Beruete Díaz, Miguel (Optical Society of America, 2017)   Artículo / Artikulua
    Backscattering reduction is usually achieved by using either absorbers or diffractions gratings at the expense of a narrow bandwidth. In this paper, we propose a different strategy based on a metallic compound reflection ...
  • An algorithm for group decision making using n -dimensional fuzzy sets, admissible orders and OWA operators 

    Miguel Turullols, Laura de; Sesma Sara, Mikel; Elkano Ilintxeta, Mikel; Asiain Ollo, María José; Bustince Sola, Humberto (Elsevier, 2017)   Artículo / Artikulua
    In this paper we propose an algorithm to solve group decision making problems using n -dimensional fuzzy sets, namely, sets in which the membership degree of each element to the set is given by an in- creasing tuple of n ...
  • Characterization of microring filters for differential group delay applications 

    Doménech, D.; Chamorro Posada, P.; Fraile Pelaez, F.J.; Erro Betrán, María José; Tainta Ausejo, Santiago; Muriel, M.A.; Baños, R.; Bolten, J.; Kleinjans, H. (IEEEOptical Society of America, 2017)   Artículo / Artikulua
    The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of integrated directional couplers and provides designs that can be easily implemented with current fabrication tolerances. ...
  • On the performance of the zoned fishnet metamaterial lens with positive and negative reference phase 

    Pacheco Peña, Víctor; Minin, Igor V.; Minin, Oleg V.; Beruete Díaz, Miguel (IEEE, 2016)   Artículo / Artikulua
    In this letter, several converging fishnet metalenses are designed using both the zoning and reference phase techniques. They are engineered with a focal length of 1.5λ0 at the design frequency of 55 GHz (λ0 = 5.45 mm) at ...

Más