Now showing items 88-107 of 116

    On Normal Forms and Splitting of Separatrices in Reversible Systems 

    Lázaro Ochoa, José Tomás (Date of defense: 2003-10-23)

    És difícil dibuixar una frontera, dins la Teoria de Sistemas Dinàmics, entre lleis de conservació i simetries doncs, sovint, les seves característiques es confonen. Un clar exemple d'aquest fenómen el constitueixen els ...

    On some spectral and combinatorial properties of distance-regular graphs and their generalizations 

    Diego, Víctor (Date of defense: 2017-11-24)

    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 ...

    On the quasiperiodic hamiltonian andronov-hopf bifurcation 

    Pacha Andújar, Juan Ramón (Date of defense: 2002-10-21)

    Aquest treball es situa dintre del marc dels sistemes dinàmics hamiltonians de tres graus de llibertat. Allà considerem famílies d'òrbites periòdiques amb una transició estable-complex inestable: sigui L el paràmetre que ...

    On the role of oscillatory dynamics in neural communication 

    Pérez Cervera, Alberto (Date of defense: 2019-04-04)

    In this Thesis we consider problems concerning brain oscillations generated across the interaction between excitatory (E) and inhibitory (I) cells. We explore how two neuronal groups with underlying oscillatory activity ...

    p-adic L-functions, p-adic Gross-Zagier formulas and plectic points 

    Hernández Barrios, Víctor (Date of defense: 2022-04-19)

    In this work we generalize the construction of p-adic anticyclotomic L-functions associated to an elliptic curve E/F and a quadratic extension K/F, by defining a measure µ_f^p attached to K/F and an automorphic form. In ...

    Parallel Lagrangian particle transport : application to respiratory system airways 

    Olivares Mañas, Edgar (Date of defense: 2018-11-09)

    This thesis is focused on particle transport in the context of high computing performance (HPC) in its widest range, from the numerical modeling to the physics involved, including its parallelization and post-process. The ...

    Paving the path towards automatic hexahedral mesh generation 

    Roca Navarro, Xevi (Date of defense: 2009-07-23)

    Esta tesis versa sobre el desarrollo de las tecnologías para la generación de mallas de hexaedros. El proceso de generar una malla de hexaedros no es automático y su generación requiere varias horas te trabajo de un ingeniero ...

    Probabilistic and extremal studies in additive combinatorics 

    Wötzel, Maximilian (Date of defense: 2022-01-26)

    The results in this thesis concern extremal and probabilistic topics in number theoretic settings. We prove sufficient conditions on when certain types of integer solutions to linear systems of equations in binomial ...

    Probabilitat i causalitat en el manteniment en la marina mercant 

    Verdera i Tomas, Ernest (Date of defense: 1990-01-01)

    Aquest treball vol ser una aportació positiva a la teoria general del Manteniment Industrial. <br/>La teoria del Manteniment Industrial és un camp de la coneixença tècnica que encara ha de ser desbrossat d'influències que ...

    Product of digraphs, (super) edge-magic valences and related problems 

    Mohan, Prahu (Date of defense: 2019-07-03)

    Discrete Mathematics, and in particular Graph Theory, has gained a lot of popularity during the last 7 decades. Among the many branches in Graph Theory, graph labelings has experimented a fast development, in particular ...

    Propagación de ondas monocromáticas en guíaondas dieléctricas planas formadas por medios no lineales tipo Keir: Aplicación al diseño de dispositivos lógicos 

    Dios Otín, Federico (Date of defense: 1992-03-05)

    El trabajo se enmarca dentro del estudio de ciertas propiedades ópticas con vistas a su inclusión en el diseño de dispositivos de conmutación de señales ópticas. En particular se ha prestado atención a los medios que exhiben ...

    Qualitative properties of solutions to integro-differential elliptic problems 

    Felipe Navarro, Juan Carlos (Date of defense: 2021-07-14)

    The thesis is devoted to the analysis of elliptic PDEs and related problems. It is mainly focused on the study of qualitative and regularity properties of solutions to integro-differential equations. The study of such ...

    Rational-design of new candidates targeting bak and bombesin receptors in cancer 

    Vila i Julià, Guillem (Date of defense: 2023-11-22)

    (English) Cancer is the second leading cause of death globally, only behind cardiovascular diseases, being a major public health issue. Cancer comprises a wide group of diseases characterized by abnormal cell growth, which ...

    Recubrimientos k-arco transitivos de digrafos 

    Pérez Mansilla, Sonia (Date of defense: 2001-02-02)

    Un digrafo o grafo dirigido se dice que es k-arco transitivo si tiene grupo de automorfismos que actúa transitivamente en el conjunto de k-arcos. Para un entero positivo k, un k-arco de un digrafo es una secuencia ...

    Robotic manipulation of cloth: mechanical modeling and perception 

    Coltraro Ianniello, Franco (Date of defense: 2023-03-30)

    (Eng) In this work we study various mathematical problems arising from the robotic manipulation of cloth. First, we develop a locking-free continuous model for the physical simulation of inextensible textiles. We present ...

    Simulation of two-fluid immiscible Stokes flows using hybrid nonconforming methods and geometrically unfitted meshes 

    Piccardo, Stefano (Date of defense: 2023-12-04)

    (English) We consider two-fluid problems involving immiscible Stokes fluids in contact and with surface tension at their interface. We develop, analyze, and compare two approaches for space discretization, the Hybrid ...

    Special values of the triple product p-adic L-function 

    Gatti, Francesca (Date of defense: 2021-03-19)

    Let E be an elliptic curve defined over the field of rational numbers and let f be the corresponding newform of weight 2. Let g,h be two weight one newforms whose nebentype characters are mutually inverse. Let V be the ...

    Stable solutions of nonlinear fractional elliptic problems 

    Sanz Perela, Tomás (Date of defense: 2019-06-18)

    This thesis is devoted to study integro-differential equations. This type of equations constitutes nowadays a very active field of research which has important applications in modeling real-life phenomena where nonlocal ...

    Stratification theory of matrix pairs under equivalence and contragredient equivalence 

    Klymchuk, Tetiana (Date of defense: 2019-06-21)

    We develop the theory of perturbations of matrix pencils basing on their miniversal deformations. Several applications of this theory are given. All possible Kronecker pencils that are canonical forms of pencils in an ...

    A study of cortical network models with realistic connectivity 

    Vegué, Marina (Date of defense: 2018-03-23)

    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 ...