Departament de Física: Enviaments recents
Ara mostrant els elements 1-20 de 36
Morphometric seagrass thresholds for hydrodynamics and sediment capture
Seagrass meadows are globally extensive nearshore ecosystems known as coastal engineers that provide key ecological services in coastal areas such as attenuating wave and turbulence and promoting sediment deposition. ...
Production and characterization of magnetic iron-based materials by mechanical alloying, arc melting, and spark plasma sintering
This thesis dissertation discusses the microstructure, thermal behavior, magnetic and mechanical properties of some Fe-based alloys and a high entropy alloy (HEA) in the form of mechanically alloyed powders or bulk solids, ...
Analysis of creep crack growth in adhesively bonded joints under mode I loading
Adhesive bonds could replace more traditional mechanical joints, making structures lighter and smoother. Stresses are distributed over a larger area, and dissimilar materials can be bonded, accommodating differences in ...
Implementation of a high-pressure resin transfer molding (HP-RTM) process to increase the production rate of structural composites and characterization of sustainable vitrimer-matrix high-performance composites
Transport industry, especially automotive, is one of the most pollutant in the world. Current environmental concerns demand original equipment manufacturers (OEM’s) to reduce the amount of emissions released by their ...
Contribución a la comprensión y mejora de los procesos de inyección de resina para la fabricación de componentes aeronáuticos de geometría compleja en composite
To overcome the challenges coming from environmental impacts has been a priority for the aeronautical sector in the past years, with a special focus on reducing CO2 emissions. The fibre-reinforced polymers (FRP) are ...
A computational micromechanics investigation of longitudinal strength in unidirectional fibre reinforced composites
The use of Fibre Reinforced Polymers (FRP) composites has grown in popularity over the last few decades. They offer outstanding mechanical properties combined with a low density, making them an excellent solution for many ...
Synthèse, caractérisation et étude magnétique des alliages à mémoire de forme de type Heusler Ni-Mn-Sn-X (X= Pd, Cu)
Shape memory alloys witch exhibit magnetically induced phase transformations at room temperatures are the most interesting for magnetic cooling applications. Heusler type alloys (both stoichiometric and non-stoichiometric) ...
Cloud-aerosol transition zone radiative effects from modeling and observational perspectives
Aerosols and clouds, as two particular cases of a single phenomenon (i.e., a suspension of particles in the air), are important components in the climate system. They play a crucial role in determination of Earth’s energy ...
Producció i anàlisi d’aliatges Heusler no estequiomètrics: Ni-Mn-Sn-(Co,Fe)
Magnetic memory alloys are a subset of shape memory materials that respond to the application of external magnetic fields. These materials are currently gaining more and more interest, given their properties, for use in ...
Aliatges magnètics nanocristal·lins de base ferro i aliatges Heusler: producció i caracterització
This work is focused on the production and characterization of: (1) Fe based nanocrystalline soft magnetic materials of NANOPERM and HITPERM families and (2) Heusler magnetic shape memory alloys. Within the first typology, ...
Advanced thermal analysis of ReBCO superconductor precursor films and functional oxides
High temperature superconductivity and in particular YBa2Cu3O7-x (YBCO) coated conductors (CCs) are a crucial technology for the drastic reduction of CO2 emissions. Since nowadays YBCO CCs are not competitive economically, ...
X-ray tomography investigation of the impact damage mechanisms of thin-ply composites and the use of veils to improve their impact tolerance
This thesis investigates the impact response of novel laminates made with “thin-plies” as well as proposes a toughening method to improve their impact tolerance. To this purpose, we devised a wide experimental campaign ...
Population range expansions, with mathematical applications to interacting systems and ancient human genetics
The thesis studies from an analytical and computational perspective, and by using reaction-diffusion equations, the spatiotemporal evolution of different populations. First, the dynamics of the T7 bacteriophage infecting ...
Synthèse, caractérisation et application des alliages à base de Mn-X-Y (X=Al; Y=Fe,Co) et Ca-Al dans la dégradation d'un colorant azoïque "Black 5" utilisé dans l'industrie de textile
This work is framed in the general context of the synthesis and characterization of Mn or Ca based alloys, which are subsequently applied in degradation processes of azo dyes used in the textile industries. The alloys were ...
Development and study of nanocrystalline and amorphous soft-ferromagnetic alloys
This thesis deals with the production, characterization and analysis of Fe and Co based nanocrystalline and amorphous soft-ferromagnetic alloys, alloys showing ferromagnetic hysteresis cycles with low energy losses, produced ...
A contribution to the understanding of compression after impact of composite laminates
The threat of impact on laminated composite structures has been a serious concern in the aerospace industry and scientific community because the compression load-carrying capacity of the structures, namely Compression 1/2 After ...
Modified hydrodynamics in fragmented canopies exposed to oscillatory flows
The general objective of this doctoral thesis has been to contribute to understand the modification of hydrodynamics in fragmented canopies. The effect of different parameters such as the canopy density, the plant height ...
Effects of aquatic vegetation on sediment transport
In the margins of continents there are the coastal zones, regions of remarkable biological productivity. Coastal zones include, among others, wetlands, that are land areas inundated permanently o seasonally, characterized ...
Sunshine duration as a proxy of the atmospheric aerosol content
One of the most important radiative properties of aerosols is their optical thickness (AOD), which is closely linked to the total burden of atmospheric aerosols. On the contrary, we do avail of long time series of sunshine ...
Evaluación de modelos climáticos: el comportamiento de la variable nubosidad
Las nubes constituyen uno de los fenómenos más importantes en cuanto a la regulación de la radiación entrante y saliente de la Tierra y por ende, del clima. El principal objetivo de esta tesis es analizar cómo se reproduce ...
