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 ...
  • 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 ...
  • 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 ...
  • Implementation of context aware e-health environments based on social sensor networks 

    Aguirre Gallego, Erik; Led Ramos, Santiago; López Iturri, Peio; Azpilicueta Fernández de la Heras , Leyre; Serrano Arriezu, Luis Javier; Falcone Lanas, Francisco Javier (MDPI, 2016)   Artículo / Artikulua
    In this work, context aware scenarios applied to e-Health and m-Health in the framework of typical households (urban and rural) by means of deploying Social Sensors will be described. Interaction with end-users and ...
  • 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 ...
  • Radio characterization for ISM 2.4 GHz wireless sensor networks for judo monitoring applications 

    López Iturri, Peio; Aguirre Gallego, Erik; Azpilicueta Fernández de las Heras, Leyre; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2014)   Artículo / Artikulua
    In this work, the characterization of the radio channel for ISM 2.4GHz Wireless Sensor Networks (WSNs) for judo applications is presented. The environments where judo activity is held are usually complex indoor scenarios ...
  • A fiber optic ammonia sensor using a universal pH indicator 

    Rodríguez Rodríguez, Adolfo Josué; Ruiz Zamarreño, Carlos; Matías Maestro, Ignacio; Arregui San Martín, Francisco Javier; Cruz, René; May Arrioja, Daniel A. (MDPI, 2014)   Artículo / Artikulua
    A universal pH indicator is used to fabricate a fiber optic ammonia sensor. The advantage of this pH indicator is that it exhibits sensitivity to ammonia over a broad wavelength range. This provides a differential response, ...
  • 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; López Aldaba, Aitor; Duarte, Lia; Rodrigues Pinto, Ana Margarida; 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; González Herráez, Miguel; Baptista, José Manuel; Flores, Deolinda (MDPI, 2017)   Artículo / Artikulua
    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 ...
  • Modelling of PEM fuel cell performance: steady-state and dynamic experimental validation 

    San Martín Biurrun, Idoia; Ursúa Rubio, Alfredo; Sanchís Gúrpide, Pablo (MDPI, 2014)   Artículo / Artikulua
    This paper reports on the modelling of a commercial 1.2 kW proton exchange membrane fuel cell (PEMFC), based on interrelated electrical and thermal models. The electrical model proposed is based on the integration of the ...
  • Gasohol quality control for real time applications by means of a multimode interference fiber sensor 

    Rodríguez Rodríguez, Adolfo Josué; Baldovino Pantaleón, Óscar; Cruz, René; Ruiz Zamarreño, Carlos; Matías Maestro, Ignacio; May Arrioja, Daniel A. (MDPI, 2014)   Artículo / Artikulua
    In this work we demonstrate efficient quality control of a variety of gasoline and ethanol (gasohol) blends using a multimode interference (MMI) fiber sensor. The operational principle relies on the fact that the addition ...
  • Control strategies to smooth short-term power fluctuations in large photovoltaic plants using battery storage systems 

    Marcos Álvarez, Javier; Parra Laita, Íñigo de la; García Solano, Miguel; Marroyo Palomo, Luis (MDPI, 2014)   Artículo / Artikulua
    The variations in irradiance produced by changes in cloud cover can cause rapid fluctuations in the power generated by large photovoltaic (PV) plants. As the PV power share in the grid increases, such fluctuations may ...
  • Development of a low mobility IEEE 802.15.4 compliant VANET system for urban environments 

    Nazábal Urriza, Juan Antonio; Falcone Lanas, Francisco Javier; Fernández Valdivielso, Carlos; Matías Maestro, Ignacio (MDPI, 2013)   Artículo / Artikulua
    The use of Vehicular Ad-Hoc Networks (VANETs) is growing nowadays and it includes both roadside-to-vehicle communication (RVC) and inter-vehicle communication (IVC). The purpose of VANETs is to exchange useful information ...
  • Analysis matrix for smart cities 

    Branchi, Pablo Emilio; Fernández Valdivielso, Carlos; Matías Maestro, Ignacio (MDPI, 2014)   Artículo / Artikulua
    The current digital revolution has ignited the evolution of communications grids and the development of new schemes for productive systems. Traditional technologic scenarios have been challenged, and Smart Cities have ...
  • 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 ...
  • Tillage effects on soil quality after three years of irrigation in Northern Spain 

    Apesteguía Barberena, Marcos; Virto Quecedo, Íñigo; Orcaray Echeverría, Luis; Bescansa Miquel, Paloma; Enrique Martín, Alberto; Imaz Gurruchaga, María José; Karlen, Douglas (MDPI, 2017)   Artículo / Artikulua
    Irrigation is being initiated on large areas of traditionally rainfed land to meet increasing global demand for food, feed, fiber and fuel. However, the consequences of this transition on soil quality (SQ) have scarcely ...
  • One-way quasiplanar terahertz absorbers using nonstructured polar dielectric layers 

    Rodríguez Ulibarri, Pablo; Serebryannikov, Andriy; Beruete Díaz, Miguel (American Physical Society, 2017)   Artículo / Artikulua
    A concept of quasiplanar one-way transparent terahertz absorbers made of linear isotropic materials is presented. The resulting structure consists of a homogeneous absorbing layer of polar dielectric, GaAs, a dispersion-free ...
  • An optimized method based on digitalized Lissajous curve to determine lifetime of luminescent materials on optical fiber sensors 

    Ridruejo Muro, Adrián; Acha Morrás, Nerea de; Elosúa Aguado, César; Matías Maestro, Ignacio; Arregui San Martín, Francisco Javier (Hindawi Publishing Corporation, 2016)   Artículo / Artikulua
    A method is proposed to determine lifetime of luminescent emissions based on the phase shift measurement employing the digitalized Lissajous representation: this diagram has been typically used with analogical algorithms, ...

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