Now showing items 84-103 of 172

    A geometric approach to the structure of complex networks 

    García Pérez, Guillermo (Date of defense: 2018-11-16)

    Complex networks are mathematical representations of the interaction patterns of complex systems. During the last 20 years of Network Science, it has been recognized that networks from utterly different domains exhibit ...

    Guiding active particles through surface interactions 

    Katuri, Jaideep (Date of defense: 2018-09-20)

    Living organisms and systems are continually converting energy, either internally stored or transduced from their surroundings, into motion. This activity and the resulting self-propulsion constantly push these biological ...

    High-quality observations for improved seasonal predictions. Implications for the wind energy sector 

    Ramon Gamon, Jaume (Date of defense: 2022-01-27)

    Multiple initiatives are being implemented to mitigate and, in the worst-case scenarios, adapt society to climate change. The vast majority consider renewable energies key to accomplishing a necessary transition from fossil ...

    Highly active and efficient metal-decorated silicon-based nanostructured photoelectrodes for water splitting solar cells 

    Han, Tingting (Date of defense: 2020-12-11)

    With the burning of large amounts of traditional fossil fuels, global environmental pollution is getting worse and worse, and energy crisis is becoming more serious for meeting human’s life demand. In ...

    Holographic duals of lower dimensional theories 

    Pravos Fernández, David (Date of defense: 2019-11-08)

    This thesis describes some results in AdS/CFT duality for quantum field theories in 2+1 and 1+1 dimensions. In first place, a one-parameter family of supergravity solutions is described, obtained as a deformation of a ...

    Holographic Phase Transitions and Gravitational Waves 

    Sanchez Garitaonandia, Mikel (Date of defense: 2022-07-15)

    Cosmological thermal first-order phase transitions are assumed to proceed via the nucleation of bubbles and subsequent expansion and collision. The out-of-equilibrium physics involved during the collision of bubbles is ...

    How cosmology can help and benefit from other areas of physics 

    Valcin, David (Date of defense: 2021-09-28)

    CONTEXT: The current ΛCDM cosmological paradigm has seen remarkable success in recent decades (whether it is the discovery of the CMB, the formation of large-scale structures, the expansion of the universe etc.). Like any ...

    Human collective behavior models: language, cooperation and social conventions 

    Amato, Roberta (Date of defense: 2018-04-13)

    The topics dealt with in this thesis are all part of the general problem of social consensus, namely how a convention flourish and decay and what motivates people to conform to it. Examples range from driving on the right ...

    Hybrid bio-robotics: from the nanoscale to the macroscale 

    Mestre Castillo, Rafael (Date of defense: 2020-11-26)

    Hybrid bio-robotics is a discipline that aims at integrating biological entities with synthetic materials to incorporate features from biological systems that have been optimized through millions of years of evolution and ...

    Hydrodynamic effects on active colloidal suspensions 

    Navarro Argemí, Eloy (Date of defense: 2018-10-25)

    The goal of this thesis is studying hydrodynamic effects on active colloidal suspensions. Hydrodynamic interaction is propagated through the fluid in which the colloids displace due to the flow they create during their ...

    Hydrogel co-networks of gelatin methacryloyl and poly(ethylene glycol)diacrylate sustain 3D functional in vitro models of intestinal mucosa 

    Vila Giraut, Anna (Date of defense: 2020-12-10)

    Conventional in vitro cell culture models do not possess the complexity that the native tissues offer. Because of this, the functional properties of the tissues are not properly mimicked, which causes poorly predictive ...

    Implications of phase coexistence in VO(2) thin-films across the metal-insulator transition 

    Rodríguez Domínguez, Laura (Date of defense: 2021-12-16)

    A Metal-insulator transition (MIT) is the ability of some materials to change between metal and insulator electric behaviours as a function of some external stimuli such as temperature, stress, voltage, magnetic field or ...

    Insertion of fluorescent manganese compounds - models of catalase - into mesoporous nanoparticles of silica, resol-silica and carbon-silica 

    Turquet, François-Xavier (Date of defense: 2018-12-17)

    ROS (Reactive Oxygen Species), such as H2O2, HO● and O2-●, are naturally produced by the metabolism of living beings. However, they can appear in large quantities in the case of certain diseases (Alzheimer's, Parkinson's, ...

    Integration of Micro Solid Oxide Fuel Cells in Power Generator Devices 

    Pla i Asesio, Dolors (Date of defense: 2015-07-31)

    In the last decades, energy requirements of portable devices are exponentially increasing while the capacity of the current battery technology is not progressing accordingly. This energy gap claims for the development of ...

    Intensity-Duration-Frequency of Rainfall in Catalunya. Maximum Expected Precipitation and IDF Relationships at High Temporal and Spatial Resolution 

    Llabrés Brustenga, Alba (Date of defense: 2020-01-14)

    Intensity - Duration - Frequency (IDF) relationships of extreme precipitation events are of high interest in hydrology. The building of infrastructure or designation of flood zone need, as groundwork, the recurrence intervals ...

    Interactions of electrons with matter 

    Fernández Varea, José María (Date of defense: 1992-07-27)

    The interaction of electrons with matter has been a subject of intense work since the beginning of the century. Although we know that the interaction is purely electromagnetic, its theoretical description is ...

    Interface Engineering in Mixed Ionic Electronic Conductor Thin Films for Solid State Devices 

    Chiabrera, Francesco Maria (Date of defense: 2019-06-28)

    Interface-dominated materials such as nanocrystalline thin films have emerged as an enthralling class of materials able to engineer functional properties of transition metal oxides widely used in energy and information ...

    Investigating pathological extracellular matrix architecture 

    Almici, Enrico (Date of defense: 2022-10-10)

    [eng] The composition and architecture of the extracellular matrix (ECM), and their dynamic alterations, play an essential regulatory role in numerous cellular processes. Furthermore, structural, and biochemical properties ...

    Jets as Probes of Strongly Coupled Quark-Gluon Plasma 

    Pablos Alonso, Daniel (Date of defense: 2016-06-22)

    In this thesis we have studied how high energetic excitations propagate through a non- abelian strongly coupled plasma. This new state of matter is produced at heavy ion collisions in our accelerators and allows us to study ...

    Kesterite Deposited by Spray Pyrolysis for Solar Cell Applications 

    Espindola Rodriguez, Moises (Date of defense: 2015-07-23)

    Solar cells generate electrical power by direct conversion of solar radiation into electricity using semiconductors. Once produced, the solar cells do not require the use of water; operate in silence and can be easily ...