Now showing items 1-12 of 83

• #### The geometry and topology of steady Euler flows, integrability and singular geometric structures ﻿

(Universitat Politècnica de Catalunya, 2021-05-26)
Doctoral thesis
Open Access
In this thesis, we make a deep investigation of the geometry and dynamics of several objects (singular or not) appearing in nature. The main goal is to study rigidity versus flexibility dynamical behavior of the objects ...
• #### A theoretical and computational study of the interaction between biomembranes and curved proteins ﻿

(Universitat Politècnica de Catalunya, 2021-04-30)
Doctoral thesis
Open Access
Organelles are the smallest functional parts of eukaryotic cells. Among them, some are membrane-bound such as the nucleus, the endoplasmic reticulum, or the Golgi apparatus, each of them with essential biological functions. ...
• #### A hesitant fuzzy perceptual-based approach to model linguistic assessments ﻿

(Universitat Politècnica de Catalunya, 2021-04-07)
Doctoral thesis
Open Access
Multiple-criteria or multiple-attribute group decision-making is a sub-field of operations research that seek to find a common and representative solution given the preferences elicited by a pre-defined group, over a set ...
• #### Long-term privacy in electronic voting systems ﻿

(Universitat Politècnica de Catalunya, 2021-04-14)
Doctoral thesis
Open Access
This PhD thesis focuses on lattice-based cryptography and how to apply it to build post-quantum online voting systems. It is the result of the research done by the author at Scytl in close collaboration with Dr. Paz Morillo, ...
• #### Special values of the triple product p-adic L-function ﻿

(Universitat Politècnica de Catalunya, 2021-03-19)
Doctoral thesis
Open Access
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 ...
• #### Arithmetic applications of the Euler systems of Beilinson-Flach elements and diagonal cycles ﻿

(Universitat Politècnica de Catalunya, 2021-02-12)
Doctoral thesis
Open Access
The main objective of this dissertation is the exploration of certain arithmetic applications of the Euler systems of Beilinson--Flach elements and diagonal cycles. Euler systems have been proved to be a very powerful tool ...
• #### Active superelasticity in three-dimensional epithelia of controlled shape ﻿

(Universitat Politècnica de Catalunya, 2021-02-19)
Doctoral thesis
Open Access
Fundamental processes in development and physiology are determined by the three-dimensional architecture of epithelial sheets. How these sheets deform and fold into complex structures has remained unclear, however, because ...
• #### New geometrical and dynamical techniques for problems in celestial mechanics ﻿

(Universitat Politècnica de Catalunya, 2021-02-17)
Doctoral thesis
Open Access
In this thesis, we study the application of symplectic geometry, regular and singular, to symplectic dynamical systems.We start with a motivating case: the relation between symplectic foliations and global transverse ...
• #### bm-Symplectic manifolds: symmetries, classification and stability ﻿

(Universitat Politècnica de Catalunya, 2020-09-30)
Doctoral thesis
Open Access
This thesis explores classification and perturbation problems for group actions on a class of Poisson manifolds called $b^m$-Poisson manifolds. $b^m$-Poisson manifolds are manifolds which are symplectic away from a ...
• #### Development of a Large-Eddy simulation framework for engineering applications using the finite element method ﻿

(Universitat Politècnica de Catalunya, 2019-04-03)
Doctoral thesis
Open Access
This thesis develops a large eddy simulation framework for engineering applications using the finite element method. It focuses on the numerical formulation, the wall modelling approach as well as the generation of turbulent ...
• #### Desarrollo de un sistema de monitorización de la integridad estructural para aplicaciones en ingeniería mediante técnicas de reducción de la dimensionalidad ﻿

(Universitat Politècnica de Catalunya, 2020-12-21)
Doctoral thesis
Open Access
This thesis describes a structural health monitoring (SHM) strategy to detect and classify changes in structures that can be equipped with sensors. SHM is an area of great interest, because its main objective is to verify ...
• #### Estudio y caracterización de soluciones para juegos cooperativos y bicooperativos ﻿

(Universitat Politècnica de Catalunya, 2020-11-24)
Doctoral thesis
Open Access
The first part of this thesis focuses on cooperative games and specifically on the study of semivalues and probabilistic values. Each semivalue, as a solution concept defined on cooperative games with a finite set of ...