Non-linear fluid dynamics in oscillatory cylindrical cavities 

Panadès i Guinart, Carles (Date of defense: 2013-06-28)

Even though the transition to turbulence has been studied for over a century, its complete comprehension still remains unclear even for the simplest flows and continues to be a daunting challenge for the scientific community. ...

Neuronal oscillations: from single-unit activity to emergent dynamics and back 

Sancristóbal Alonso, Belén de (Date of defense: 2013-07-22)

L’objectiu principal d’aquesta tesi és avançar en la comprensió del processament d’informació en xarxes neuronals en presència d’oscil lacions subumbrals. La majoria de neurones propaguen la seva activitat elèctrica a ...

Convección térmica en un anillo cilíndrico en rotación 

Alonso Maleta, Ma. Aránzazu (María Aránzazu) (Date of defense: 1999-04-30)

En la tesis doctoral Convección térmica en un anillo cilíndrico en rotación se estudian diferentes aspectos de la dinámica lineal y no lineal de un fluido Boussinesqconfinado en un anillo cilíndrico, en rotación alrededor ...

Transient and stochastic dynamics in cellular processes 

Rué Queralt, Pau (Date of defense: 2013-07-25)

This Thesis studies different cellular and cell population processes driven by non-linear and stochastic dynamics. The problems addressed here gravitate around the concepts of transient dynamics and relaxation from a ...

Monte Carlo study of quantum phase transitions at zero temperature 

Osychenko, Oleg N. (Date of defense: 2012-12-20)

The Thesis is devoted to simulations of quantum phase transitions by means of Quantum Monte Carlo techniques. Quantum phase transition is a transition between phases at zero or low enough temperature, where quantum effects ...

Dinámica de circuitos de regulación genética en bacterias 

Espinar Calvo, María Lorena (Date of defense: 2012-12-21)

El objetivo de esta Tesis es el estudio de diferentes comportamientos celulares dinámicos en Escherichia coli y Bacillus subtilis. Es interesante comprender cómo estos organismos sencillos poseen mecanismos complejos para ...

Characterization of the structure, stability, mechanical and electrochemical properties of metallic glasses 

Duarte Correa, María Jazmín (Date of defense: 2013-05-31)

Metallic glasses are often referred as glassy or amorphous alloys. They lack long-range order and microstructural defects that are characteristics in crystals, such as grain and phase boundaries and dislocations. These new ...

Análisis estadístico y comportamiento fractal de las réplicas sísmicas del Sur de California 

Monterrubio Velasco, Marisol (Date of defense: 2013-03-15)

Mediante el análisis estadístico y utilizando diversas técnicas fractales en esta tesis se estudia el comportamiento temporal y espacial de tres series de réplicas sísmicas ocurridas en el Sur de California, que tuvieron ...

Hawking radiation in NS5 and little string theory 

Lorente Espín, Oscar (Date of defense: 2012-09-20)

In this thesis we have focused on semi-classical methods that enables us to obtain non-thermal spectra for the vast majority of black holes. This fact is due to taking into account the backreaction of the metric, when the ...

Modelling the dynamics of large scale shoreline sand waves 

Van Der Berg, Niels (Date of defense: 2012-05-11)

Shoreline sand waves are shoreline undulations with a length scale of several kilometres and a time scale of years to decades. They occur on many coasts, migrating in the direction of the dominant littoral drift and they ...

Study on conduction mechanismes of mediun voltage cable XLPE insulation in the melting range of temperatures. 

Orrit Prat, Jordi (Date of defense: 2012-03-07)

D’ençà que el polietilè reticulat (XLPE) es va començar a utilitzar com aïllament elèctric per cables de subministrament elèctric, s’han destinat molts esforços a l’estudi de les propietats dielèctriques del polietilè i ...

Path Integral Monte Carlo and Bose-Einstein condensation in quantum fluids and solids 

Rota, Riccardo (Date of defense: 2011-12-20)

Several microscopic theories point out that Bose-Einstein condensation (BEC), i.e., a macroscopic occupation of the lowest energy single particle state in many-boson systems, may appear also in quantum fluids and solids ...

Silver nanostructures: chemical synthesis of colloids and composites nanoparticles, plamon resonance properties and silver nanoparticles monolayer films prepared by spin-coating 

Torres Heredia, Victor Elias (Date of defense: 2011-11-08)

El presente trabajo tiene como objetivo desarrollar en solución acuosa y a tem-peratura ambiente, rutas de síntesis química coloidal de nanopartículas de plata y nano-partículas compuestas estables. Se obtienen nanopartículas ...

Stochasticity,complexity and synchronization in semiconductor lasers 

Tiana Alsina, Jordi (Date of defense: 2011-11-10)

The purpose of this Thesis is study the dynamical behavior of semiconductor lasers with optical feedback, as well as analyze the synchronization of this kind of systems under different coupling arquitectures. This study ...

Estudio de modelos de ión polarizables para sales fundidas mediante dinámica molecular 

Bitrián Varea, Vicente (Date of defense: 2011-07-11)

La presente tesis es un estudio mediante simulaciones de dinámica molecular de los efectos de la polarización inducida en las propiedades de las sales fundidas, en concreto de los haluros de plata. Estas sales se caracterizan ...

Bubble and droplet flow phenomena at different gravity levels 

Suñol Galofré, Francesc (Date of defense: 2011-07-19)

Two-phase flows are encountered in a wide range of applications both on-ground and in space. The dynamics of such flows in the absence of gravity is completely different from that in normal gravity due to the absence of ...

Nonlinear frequency conversion under general phase mismatched condition: the role of phase locking and random nonlinear domains 

Vito, Roppo (Date of defense: 2011-06-15)

In the field of second harmonic (SH) generation most studies have been concerned with maximizing conversion efficiencies, generally achievable at the phase matching (PM) condition. Outside of the PM the conversion efficiency ...

Respuesta extrínseca y comportamiento no lineal en materiales cerámicos piezoeléctricos 

Ochoa Guerrero, Diego Alejandro (Date of defense: 2009-02-19)

The study of the elastic, dielectric and piezoelectric non-linear behavior in PZT-based and KNN-based piezoelectric ceramics represent the main goal of this work. Both systems present a perovskite-like structure. Several ...

Probing the near-field optical response of plasmon nanostructures with two-photon luminescence microscopy 

Ghenuche, Petru Virgil (Date of defense: 2009-04-02)

Esta tesis describe el diseño, la fabricación y la caracterización óptica de sistemas plasmónicos resonantes capaces de confinar y aumentar campos de luz en la escala manométrica. En primer lugar, se utilizaron modelos ...

Multiscale techniques in turbulence: application to geophysical fluids and operational oceanography 

Nieves Calatrava, Verónica U. (Date of defense: 2008-01-25)