Enviaments recents

  • Feasibility of precise navigation in high and low latitude regions under scintillation conditions 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià; Camps Carmona, Adriano José; Riba Sagarra, Jaume; Barbosa, José; Blanch Llosa, Estefania; Altadill, David; Orús Pérez, Raul (2018-02-06)
    Article
    Accés obert
    Scintillation is one of the most challenging problems in Global Navigation Satellite Systems (GNSS) navigation. This phenomenon appears when the radio signal passes through ionospheric irregularities. These irregularities ...
  • The impacts of the ionospheric observable and mathematical model on the Global Ionosphere Model 

    Nie, Wenfeng; Xu, Tianhe; Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Chen, Wu; Xu, Guochang (2018-02-01)
    Article
    Accés obert
    A high-accuracy Global Ionosphere Model (GIM) is significant for precise positioning and navigating with the Global Navigation Satellite System (GNSS), as well as space weather applications. To obtain a precise GIM, it is ...
  • AATR an ionospheric activity indicator specifically based on GNSS measurements 

    Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Rovira Garcia, Adrià; González Casado, Guillermo; Ibáñez Segura, Deimos; Orús Pérez, Raul (2018-03-01)
    Article
    Accés obert
    This work reviews an ionospheric activity indicator useful for identifying disturbed periods affecting the performance of Global Navigation Satellite System (GNSS). This index is based in the Along Arc TEC Rate (AATR) and ...
  • GPS differential code biases determination: methodology and analysis 

    Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Rovira Garcia, Adrià; González Casado, Guillermo (2017-10)
    Article
    Accés restringit per política de l'editorial
    We address two main problems related to the receiver and satellite differential code biases (DCBs) determination. The first issue concerns the drifts and jumps experienced by the DCB determinations of the International ...
  • Eccentricity samples: implications on the potential and the velocity distribution 

    Cubarsí Morera, Rafael; Stojanovic, Milan; Ninkovic, Slobodan (2017)
    Article
    Accés obert
    Planar and vertical epicycle frequencies and local angular velocity are related to the derivatives up to the second order of the local potential and can be used to test the shape of the potential from stellar disc samples. ...
  • Intrinsic functional and architectonic heterogeneity of tumor-targeted protein nanoparticles 

    Peasarrodona, Mireia; Crosas, Eva; Cubarsí Morera, Rafael; Vazquez, Esther; Villaverde, Antonio; et al., . (2017-04)
    Article
    Accés obert
    Self-assembling proteins are gaining attention as building blocks for application-tailored nanoscale materials. This is mostly due to the biocompatibility, biodegradability, and functional versatility of peptide chains. ...
  • A method for scintillation characterization using geodetic receivers operating at 1 Hz 

    Juan Zornoza, José Miguel; Aragón Ángel, Maria Angeles; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià (2017-05-08)
    Article
    Accés restringit per política de l'editorial
    Ionospheric scintillation produces strong disruptive effects on global navigation satellite system (GNSS) signals, ranging from degrading performances to rendering these signals useless for accurate navigation. The current ...
  • Functional protein-based nanomaterial produced in microorganisms recognized as safe: A new platform for biotechnology 

    Cano Garrido, Olivia; Sanchez Chardi, Alejandro; Parés, Silvia; Giró, Irene; Tatkiewicz, Witold I.; Ferrer Miralles, Neus; Ratera, Imma; Natalello, Antonino; Cubarsí Morera, Rafael; Veciana Miró, Jaume; Bach, Alex; Villaverde Corrales, Antonio Pedro; Arís, Anna; García Fruitós, Elena (2016-10-01)
    Article
    Accés restringit per política de l'editorial
    Inclusion bodies (IBs) are protein-based nanoparticles formed in Escherichia coli through stereospecific aggregation processes during the overexpression of recombinant proteins. In the last years, it has been shown that ...
  • CXCR4(+)-targeted protein nanoparticles produced in the food-grade bacterium Lactococcus lactis 

    Cano Garrido, Olivia; Cespedes, Maria Virtudes; Unzueta, Ugutz; Roldan, Monica; Cubarsí Morera, Rafael; Vazquez Gómez, Esther; García Fruitós, Elena; Villaverde Corrales, Antonio Pedro (2016-09-01)
    Article
    Accés obert
    Lactococcus lactis is a Gram-positive (endotoxin-free) food-grade bacteria exploited as alternative to Escherichia coli for recombinant protein production. We have explored here for the first time the ability of this ...
  • Study of the rotation velocity in the stellar system with axial symmetry 

    Sanz Subirana, Jaume; Català, M. A. (1986-11-10)
    Article
    Accés obert
    This paper contains the calculation of the tangential component of the velocity for a model of galaxy with axial symmetry, non stationary state and equatorial symmetry plane, from the postulates and fundamental equations ...
  • The self organizing map of neighbour stars and its kinematical interpretation 

    Hernández Pajares, Manuel; Cubarsí Morera, Rafael; Monte Moreno, Enrique (1993-02)
    Article
    Accés obert
    The Self-Organizing Map (SOM) is a neural network algorithm that has the special property ofcreating spatially organized tepresetüatioes of various features of input signals. The resulting maps resemble realneural structures ...
  • Fast precise point positioning: a system to provide corrections for single and multi-frequency navigation 

    Rovira Garcia, Adrià; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Bertran Albertí, Eduardo (2016-09)
    Article
    Accés obert
    Fast Precise Point Positioning (Fast-PPP) provides Global Navigation Satellite System corrections in real-time. Satellite orbits and clock corrections are shown to be accurate to a few centimeters and a few tenths of a ...

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