Enviaments recents

  • A study of cortical network models with realistic connectivity 

    Vegué, Marina (Universitat Politècnica de Catalunya, 2018-03-23)
    Tesi
    Accés obert
    Structure is fundamental in shaping the types of computations that neuronal circuits can perform. Explaining the laws that determine the connectivity properties of brain networks and their implications in neuronal dynamics ...
  • Mathematical modelling of diffusion processes at the nanoscale 

    Ribera Ponsa, Helena (Universitat Politècnica de Catalunya, 2018-03-16)
    Tesi
    Accés obert
    In this thesis we study diffusion processes of nanoparticle evolution and develop appropriate models with the aim of being able to optimise their functions according to the needs of industry. Two distinct diffusion processes ...
  • Hybrid cell-centred/vertex model for multicellular systems 

    Mosaffa, Payman (Universitat Politècnica de Catalunya, 2017-11-11)
    Tesi
    Accés obert
    This thesis presents a hybrid vertex/cell-centred approach to mechanically simulate planar cellular monolayers undergoing cell reorganisation. Cell centres are represented by a triangular nodal network, while the cell ...
  • On some spectral and combinatorial properties of distance-regular graphs and their generalizations 

    Diego, Víctor (Universitat Politècnica de Catalunya, 2017-11-24)
    Tesi
    Accés obert
    In this work we present the study we did in Graph Theory. In the firsts chapteres of the tesis we study the pieces of information that can be obtained from a graph: the spectrum of the adjacency matrix, the preintersection ...
  • Novel consensus strategies applied to spacecraft formation flight 

    Paita, Fabrizio (Universitat Politècnica de Catalunya, 2017-09-04)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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)
    Tesi
    Accés obert
    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 ...

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