Recent Submissions

  • Novel consensus strategies applied to spacecraft formation flight 

    Paita, Fabrizio (Universitat Politècnica de Catalunya, 2017-09-04)
    Doctoral thesis
    Open Access
    In this thesis we consider the problem of developing distributed control strategies for spacecraft formation flying. In light of possible interferometric applications, the study is conducted in two different contexts: ...
  • Efficient solvers for power flow equations : parametric solutions with accuracy control assessment 

    García-Blanco, Raquel (Universitat Politècnica de Catalunya, 2017-02-09)
    Doctoral thesis
    Open Access
    The Power Flow model is extensively used to predict the behavior of electric grids and results in solving a nonlinear algebraic system of equations. Modeling the grid is essential for design optimization and control. Both ...
  • A theoretical and computational study of the mechanics of biomembranes at multiple scales 

    Torres-Sánchez, Alejandro (Universitat Politècnica de Catalunya, 2017-07-11)
    Doctoral thesis
    Open Access
    Lipid membranes are thin objects that form the main separation structure in cells. They have remarkable mechanical properties; while behaving as a solid shell against bending, they exhibit in-plane fluidity. These two ...
  • Completion and decomposition of hypergraphs by domination hypergraphs 

    Ruiz Muñoz, José Luis (Universitat Politècnica de Catalunya, 2017-07-18)
    Doctoral thesis
    Open Access
    A graph consists of a finite non-empty set of vertices and a set of unordered pairs of vertices, called edges. A dominating set of a graph is a set of vertices D such that every vertex not in D is adjacent to some vertex ...
  • Extensions of free groups: algebraic, geometric, and algorithmic aspects 

    Delgado Rodríguez, Jordi (Universitat Politècnica de Catalunya, 2017-09-15)
    Doctoral thesis
    Open Access
    In this work we use geometric techniques in order to study certain natural extensions of free groups, and solve several algorithmic problems on them. To this end, we consider the family of free-abelian times free groups ...
  • Advanced cryptographic techniques for building verifiable and transparent electronic voting protocols 

    Escala Ribas, Alex (Universitat Politècnica de Catalunya, 2017-07-21)
    Doctoral thesis
    Open Access
    Electronic voting presents many challenges due to its multiple security requirements. Some of the challenges are related to guaranteeing voters' privacy and system's transparency, which are hard to satisfy simultaneously. ...
  • Integrable systems on b-symplectic manifolds 

    Kiesenhofer, Anna (Universitat Politècnica de Catalunya, 2016-12-21)
    Doctoral thesis
    Open Access
    The study of b-symplectic manifolds was initiated in 2012 by the works of Victor Guillemin, Eva Miranda and Ana Rita Pires (Adv. Math. 264 (2014), 864¿896). These manifolds, which can be understood as symplectic manifolds ...
  • Graph enumeration and random graphs 

    Ramos Garrido, Lander (Universitat Politècnica de Catalunya, 2017-03-27)
    Doctoral thesis
    Open Access
    In this thesis we use analytic combinatorics to deal with two related problems: graph enumeration and random graphs from constrained classes of graphs. We are interested in drawing a general picture of some graph families ...
  • Monotonicity preserving shock capturing techniques for finite elements 

    Hierro Fabregat, Alba (Universitat Politècnica de Catalunya, 2016-11-28)
    Doctoral thesis
    Open Access
    The main object of study of this thesis is the development of artificial diffusion shock capturing techniques for continuous and discontinuous Galerkin (cG and dG) approximations of the convection-diffusion problem. Special ...
  • Funciones de complejidad y su relación con las familias abstractas de lenguajes 

    Gabarró, Joaquim (Universitat Politècnica de Catalunya, 1983-01-01)
    Doctoral thesis
    Open Access
  • Theta-duality in abelian varieties and the bicanonical map of irregular varieties 

    Lahoz Vilalta, Martí (Universitat Politècnica de Catalunya, 2010-05-18)
    Doctoral thesis
    Open Access
    The first goal of this Thesis is to contribute to the study of principally polarized abelian varieties (ppav), especially to the Schottky and the Torelli problems. Ppav admit a duality theory analogous to that of projective ...
  • Colored combinatorial structures: homomorphisms and counting 

    Montejano Cantoral, Amanda (Universitat Politècnica de Catalunya, 2009-06-09)
    Doctoral thesis
    Open Access
    A partir del problema de los cuatro colores se inicia el estudio de coloraciones en grafos; teoría que ha existido ya por más de 150 años, y se ocupa del problema fundamental de partir un conjunto en clases de acuerdo con ...

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