Enviaments recents

  • Signcryption schemes with threshold unsigncryption, and applications 

    Herranz Sotoca, Javier; Ruiz, Alexandre; Sáez Moreno, Germán (2014-03)
    Article
    Accés obert
    The goal of a signcryption scheme is to achieve the same functionalities as encryption and signature together, but in a more efficient way than encrypting and signing separately. To increase security and reliability in ...
  • Energy conservation in the one-phase supercooled Stefan problem 

    Myers, Timothy; Mitchell, Sarah Louise; Font Clos, Francesc (2012-12)
    Article
    Accés obert
    A one-phase reduction of the one-dimensional two-phase supercooled Stefan problem is developed. The standard reduction, employed by countless authors, does not conserve energy and a recent energy conserving form is valid ...
  • A mathematical model for the motion of an in-flight soccer ball 

    Myers, Timothy; Mitchell, Sarah Louise (2013)
    Article
    Accés obert
    In this paper, an analytical and numerical study of the three-dimensional equations describing the motion through the air of a spinning ball is presented. The initial analysis involves constant drag coefficients, but is ...
  • Numerical exploration of the limit ring problem 

    Barrabés Vera, Esther; Cors Iglesias, Josep Maria; Hall, G.R. (2013-04)
    Article
    Accés obert
    The aim of this work is to provide an insight of an idealized model of a planetary ring. The model is a limit case of the planar circular restricted 1 + n body problem, where an infinitesimal particle moves under the ...
  • Separability by semivalues modified for games with coalition structure 

    Amer Ramon, Rafael; Giménez Pradales, José Miguel (2009-06)
    Article
    Accés obert
    Two games are inseparable by semivalues if both games obtain the same allocation whatever semivalue is considered. The problem of separability by semivalues reduces to separability from the null game. For four or more ...
  • Use of wiris quizzes in an online calculus course 

    Calm, Remei; Masià, Ramon; Olivé, Carme; Parés Mariné, Núria; Pozo Montero, Francesc; Ripoll, Jordi; Sancho Vinuesa, Teresa (Omnia Publisher SL (OmniaScience), 2017)
    Article
    Accés obert
    Calculus courses often present a large number of difficulties to undergraduate students of scientific studies, especially in engineering degrees. These difficulties are sometimes related to teaching and assessment strategies. ...
  • Resistance distances on networks 

    Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2017)
    Article
    Accés obert
    This paper aims to study a family of distances in networks associated witheffective resistances. Speci cally, we consider the e ective resistance distance with respect to a positive parameter and a weight on the vertex ...
  • Wind turbine synchronous reset pitch control 

    Vidal Seguí, Yolanda; Acho Zuppa, Leonardo; Cifre Font, Ignasi; Garcia Manzanera, Àlex; Pozo Montero, Francesc; Rodellar Benedé, José (2017-06-01)
    Article
    Accés obert
    Reset controllers are commonly used to smooth the transient response of systems. We use this technique to improve a standard baseline pitch controller for offshore wind turbines (WTs). The introduction of this strategy ...
  • Distributed piezoelectric sensor system for damage identification in structures subjected to temperature changes 

    Vitola Oyaga, Jaime; Pozo Montero, Francesc; Tibaduiza Burgos, Diego Alexander; Anaya Vejar, Maribel (2017-05-31)
    Article
    Accés obert
    Structural health monitoring (SHM) is a very important area in a wide spectrum of fields and engineering applications. With an SHM system, it is possible to reduce the number of non-necessary inspection tasks, the associated ...
  • 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 ...

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