Recent Submissions

  • An inextensible model for the robotic manipulation of textiles 

    Coltraro Ianniello, Franco; Amorós Torrent, Jaume; Alberich Carramiñana, Maria; Torras, Carme (2022-01-01)
    Article
    Open Access
    We introduce a new isometric strain model for the study of the dynamics of cloth garments in a moderate stress environment, such as robotic manipulation in the neighborhood of humans. This model treats textiles as surfaces ...
  • A K-contact Lagrangian formulation for nonconservative field theories 

    Gaset Rifà, Jordi; Gràcia Sabaté, Francesc Xavier; Muñoz Lecanda, Miguel Carlos; Rivas Guijarro, Xavier; Román Roy, Narciso (2021-06-01)
    Article
    Restricted access - publisher's policy
    Dynamical systems with dissipative behaviour can be described in terms of contact manifolds and a modified version of Hamilton's equations. Dissipation terms can also be added to field equations, as showed in a recent paper ...
  • Skinner–Rusk formalism for k-contact systems 

    Gràcia Sabaté, Francesc Xavier; Rivas Guijarro, Xavier; Román Roy, Narciso (2022-02-01)
    Article
    Open Access
    In previous papers, a geometric framework has been developed to describe non-conservative field theories as a kind of modified Lagrangian and Hamiltonian field theories. This approach is that of k-contact Hamiltonian ...
  • Limiting probabilities of first order properties of random sparse graphs and hypergraphs 

    Larrauri Borroto, Lázaro Alberto; Müller, Tobias; Noy Serrano, Marcos (2021-08-18)
    Article
    Restricted access - publisher's policy
    Let Gn be the binomial random graph G(n, p = c/n) in the sparse regime, which as is well-known undergoes a phase transition at c = 1. Lynch (Random Structures Algorithms, 1992) showed that for every first order sentence ...
  • Probabilities of first-order sentences on sparse random relational structures: An application to definability on random CNF formulas 

    Larrauri Borroto, Lázaro Alberto (Oxford University Press, 2021-03-01)
    Article
    Open Access
    We extend the convergence law for sparse random graphs proven by Lynch to arbitrary relational languages. We consider a finite relational vocabulary s and a first-order theory T for s composed of symmetry and anti-reflexivity ...
  • Weak components of the directed configuration model 

    Coulson, Matthew John; Perarnau Llobet, Guillem (Springer, 2021)
    Conference report
    Restricted access - publisher's policy
    We study the threshold for the existence of a linear order weakly connected component in the directed configuration model, confirming analytic but non-rigorous results recently obtained by Kryven [8]. We also establish ...
  • Shorter lattice-based zero-knowledge proofs for the correctness of a shuffle 

    Herranz Sotoca, Javier; Martínez Pinilla, Ramiro; Sánchez Torrón, Manuel (Springer, 2021)
    Conference report
    Restricted access - publisher's policy
    In an electronic voting procedure, mixing networks are used to ensure anonymity of the casted votes. Each node of the network re-encrypts the input list of ciphertexts and randomly permutes it in a process named shuffle, ...
  • R-LWE-Based distributed key generation and threshold decryption 

    Alborch Escobar, Ferran; Martínez Pinilla, Ramiro; Morillo Bosch, M. Paz (Multidisciplinary Digital Publishing Institute (MDPI), 2022-02-25)
    Article
    Open Access
    Ever since the appearance of quantum computers, prime factoring and discrete logarithm based cryptography has been put in question, giving birth to the so called post-quantum cryptography. The most prominent field in ...
  • Developable surfaces with prescribed boundary 

    Alberich Carramiñana, Maria; Amorós Torrent, Jaume; Coltraro Ianniello, Franco (Springer-Birkhäuser, 2021)
    Part of book or chapter of book
    Open Access
    It is proved that a generic simple, closed, piecewise regular curve in space can be the boundary of only infinitely many developable surfaces with nonvanishing mean curvature. The relevance of this result in the context ...
  • State-space model of quasi-z-source inverter-PV systems for transient dynamics studies and network stability assessment 

    Monjo Mur, Lluís; Sainz Sapera, Luis; Mesas García, Juan José; Pedra Durán, Joaquim (2021-07-09)
    Article
    Open Access
    Photovoltaic (PV) power systems are increasingly being used as renewable power generation sources. Quasi-Z-source inverters (qZSI) are a recent, high-potential technology that can be used to integrate PV power systems into ...
  • Quasi-z-source inverter-based photovoltaic power system modeling for grid stability studies 

    Monjo Mur, Lluís; Sainz Sapera, Luis; Mesas García, Juan José; Pedra Durán, Joaquim (2021-01-19)
    Article
    Open Access
    Quasi-Z-source inverters (qZSIs) are becoming a powerful power conversion technology in photovoltaic (PV) power systems because they allow energy power conversion in a single stage operation. However, they can cause system ...
  • Interpolation of subdivision features for curved geometry modeling 

    Jiménez Ramos, Albert; Gargallo Peiró, Abel; Roca Navarro, Francisco Javier (2022-04)
    Article
    Restricted access - publisher's policy
    We present a nodal interpolation method to approximate a subdivision model. The main application is to model and represent curved geometry without gaps and preserving the required simulation intent. Accordingly, we devise ...

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