Now showing items 44-63 of 64

    Particle propagation in non-trivial backgrounds: a quantum field theory approach 

    Arteaga Barriel, Daniel (Date of defense: 2007-06-28)

    The basic aim of the thesis is the study of the propagation of particles and quasiparticles in non-trivial backgrounds from the quantum field theory point of view. By "non-trivial background" we mean either a non-vacuum ...

    Probing gauge theories: Exact results and holographic computations 

    Garolera Huguet, Blai (Date of defense: 2015-02-27)

    The holographic duality between gauge theories and string theories has opened a new door to access the strongly coupled regime of quantum field theories and offers, at the same time, a completely new way to ...

    Propiedades magnéticas de materiales nanoestructurados: vidrios metálicos recristalizados y partículas pequeñas de hexaferrita 

    García del Muro y Solans, Montserrat (Date of defense: 1997-02-18)

    Esta memoria presenta el estudio de las propiedades magnéticas de dos sistemas físicos pertenecientes a lo que puede considerarse una nueva generación de materiales, los constituidos por entidades básicas de tamaño ...

    Protein dynamics studied by coarse-grained and atomistic theoretical approaches 

    Orellana, Laura (Date of defense: 2014-05-30)

    Protein structure, dynamics and function, are inseparable in order to understand the mechanisms of Life at the molecular level. From the structure comes dynamics, and from dynamics many, if not all, protein functions. ...

    Reconstruction, mobility, and synchronization in complex networks 

    Prignano, Luce (Date of defense: 2012-07-20)

    During the last decades, it has become clear that systems formed by many interacting parts show emergent dynamical properties which are inherently related to the topology of the underlying pattern of connections among the ...

    Search for monochromatic gravitational-wave signals in data of the cryogenic detector "Explorer" 

    Montero Torralbo, Miquel (Date of defense: 1998-03-27)

    This essay is devoted to the search for monochromatic gravitational wave signals in the data of the cryogenic detector "Explorer". With this aim several filtering procedures have been designed and applied. Nevertheless, ...

    Simulació de sistemes iònics 

    Trullàs Simó, Joaquim (Date of defense: 1990-01-01)

    La història de la simulació de sistemes de N cossos pot resumir-se breument dient que aquesta ha anat evolucionant dels primers estudis de líquids simples a l'estudi de sistemes cada vegada més complexes (sals foses, líquids ...

    Simulació per dinàmica de Langevin generalitzada en sistemes de partícules interactives 

    Sesé i Castel, Gemma (Date of defense: 1990-05-25)

    L'anàlisi des del punt de vista dinàmic d'un sistema format per un conjunt de partícules que interactuen entre sí pot realitzar-se mitjançant diferents mètodes de simulació (Allen et al., 1987). D'entre tots ells, el més ...

    Single molecule studies in a temperature-jump optical trap 

    Lorenzo Ros, Sara de (Date of defense: 2015-01-23)

    In the field of biophysics, the study of the thermodynamic characteristics of biomolecules, such as DNA, RNA or proteins, allows us to understand more about the building blocks of life. The thermodynamic characterization ...

    Sistemes nanoestructurats mitjançant monocapes de Langmuir 

    Vallvé Antón, Maria dels Àngels (Date of defense: 2010-06-18)

    Els treballs presentats en aquesta tesi fan referència a sistemes amb estructures d’escales nanomètriques. L’estructura d'aquests sistemes s’obté mitjançant la formació de monocapes de Langmuir, dipositant dissolucions de ...

    Sobre el magnetisme de molècules d’alt espín i materials nanoporosos 

    Domingo Marimon, Neus (Date of defense: 2005-04-12)

    En aquest treball de tesi doctoral es presenta l’estudi del magnetisme de diferents materials de naturalesa metal•lorgànica emmarcats en diferents famílies. Per un cantó, tenim molècules d’alt espí amb anisotropia magnètica ...

    Statistical and thermodynamical properties of DNA unzipping experiments with optical tweezers 

    Huguet Casades, Josep Maria (Date of defense: 2011-02-04)

    [eng] Molecular biophysics is a scientific discipline that studies biomolecules. This discipline has experienced a revolution thanks to the development of single- molecule techniques. These techniques allows us to obtain ...

    Statistical Physics of Water in Hydrophobic Nano-Confinement and at Proteins Interfaces 

    Bianco, Valentino (Date of defense: 2013-07-19)

    Water is commonly associated with life. This substance affects the living beings in countless aspects and length scales, ranging from molecular biology to climatology. Water exhibits a long series of anomalous behaviors. ...

    Structure and Traffic on Complex Networks 

    Duch i Gavaldà, Jordi (Date of defense: 2008-04-18)

    In a time when large amounts of data about social, economical, technological, and biological systems are produced in a daily bases, complex networks have become a powerful tool to represent the structure of complex systems. ...

    Structure versus Magnetism in Magnetic Nanoparticles 

    Moya Álvarez, Carlos (Date of defense: 2015-12-01)

    From the fundamental point of view, NPs formed by MFe2O4 with (M= Co, Fe) are ideal system models to study the new magnetic phenomena associated with the so-called particle-like behaviour, which emerges from the size ...

    Structure, Mechanical Properties, and Self-Assembly of Viral Capsids 

    Luque Santolaria, Antoni (Date of defense: 2011-06-08)

    Viruses are submicroscopic biological entities that need to infect a host cell in order to replicate. In their simplest form viruses are constituted by an infective genetic material and a protein shell (the capsid) that ...

    The Molecular Toolbox: Dendrimer Decorated Biomaterials for Musculoskeletal Regeneration 

    Seelbach, Ryan (Date of defense: 2015-06-12)

    Regenerative medicine takes multifaceted approaches towards healing complex injury and restoring normal tissue function by combining biomaterials with cells and drugs. Recently, naturally occurring polymers found in the ...

    The motion sensing problem in spherical gravitational wave detectors 

    Serrano Moral, Ma. Ángeles (María Ángeles) (Date of defense: 1999-05-28)

    La tesis presenta una cuidadosa descripción del comportamiento dinámico de las antenas esféricas resonantes de ondas gravitatorias cuando son excitadas por radiación gravitatoria, o también por señales de calibración, ...

    The role of clustering in the stucture and function of complex networks 

    Colomer de Simón, Pol (Date of defense: 2016-06-09)

    The study of a system from a network perspective focuses on the impact that connectivity between the elements has on the function of the system. The observation and measurement of parameters of real-world networks reveals ...

    Thermal Diagnostics in the LISA Technology Package Experiment 

    Nofrarias Serra, Miquel (Date of defense: 2007-12-13)

    LISA Pathfinder (LPF) is an ESA mission, with NASA contributions, devoted to pave the way to the future spaceborne gravitational wave observatory LISA.<br/>The LISA Technology Package (LTP) experiment in the LPF mission ...