Now showing items 180-199 of 341

    Laboratory experimental procedures for the compression and shear characterisation of historical brick masonry 

    Segura Domingo, Jorge (Date of defense: 2020-12-22)

    Masonry has been used for millennia to build all sort of constructions. As a result, a significant part of the building stock around the world is made of masonry. In the need of structural assessment, structural analysis ...

    Lagrangian modeling of reactive transport in heterogeneous porous media 

    Solé Marí, Guillem (Date of defense: 2020-03-13)

    Fluid flow, solute transport, and chemical reactions in porous media are highly relevant for multiple applications and in several fields of knowledge. Aquifers are a typical example of porous media, but many others exist, ...

    Landslide and debris flow warning at regional scale. A real-time system using susceptibility mapping, radar rainfall and hydrometeorological thresholds 

    Palau Berastegui, Rosa Maria (Date of defense: 2021-09-23)

    Rainfall triggered shallow slides and debris flows constitute a significant hazard that causes substantial economic losses and fatalities worldwide. Regional-scale risk mitigation for these processes is challenging. ...

    Landslide motion assessment including thermal interaction : an MPM approach 

    Alvarado Bueno, Mauricio (Date of defense: 2018-04-23)

    Risk associated with landslides of natural or man-made origin depends on the prediction of the post-failure behaviour of the mobilized mass. Numerical models capable of integrating the landslide geometry and its evolution, ...

    Large-scale biogeography of marine pelagic bacteria and archaea 

    Salazar Guiral, Guillem (Date of defense: 2019-02-15)

    The dark ocean contains about 70% of the ocean’s microbial cells and 60% of its heterotrophic activity, which is mainly fueled by the flux of organic particles produced in the surface ocean and exported to the bathypelagic ...

    Lean construction versus Project Management in road projects : scheduling comparison 

    Elkherbawy, Ahmed Abdelbasset (Date of defense: 2019-10-22)

    Lean Construction is regarded as an innovative approach of management for various types of projects in the field of construction. As much as it is currently applied in some countries, its expansion is inevitable, for better ...

    Life cycle assessment of the cabin waste management in the aviation sector 

    Blanca Alcubilla, Gonzalo (Date of defense: 2021-11-26)

    Air transport, in 2018, was the means of transport chosen by 8.8 billion people around the world. This is a sector that expected continued passenger growth in the following years, but due to the current effects of the ...

    Linking hydrodynamic and biological processes in a shallow and micro tidal estuary : the case of Fangar bay (Ebro delta) 

    Fernández-Pedrera Balsells, Marta (Date of defense: 2022-05-24)

    This thesis analyses the relationships between hydrodynamics (and their forcings) and biological variables in Fangar Bay based on in situ observations, numerical models and satellite data. Fangar Bay is a relatively small, ...

    lntensification of mixing and homogenisation of culture medium in photobioreactors for microalgae production 

    Bělohlav, Vojtěch (Date of defense: 2021-10-20)

    Due to the large volume of the processed medium in pilot or industrial cultivation systems, it is difficult to illuminate the entire layer of the culture medium, which results in the formation of dark zones. Due to ...

    Long term response of multi-barrier schemes for underground radioactive waste disposal 

    Toprak, Erdem (Date of defense: 2018-05-02)

    The main objective of this thesis is to achieve an improved understanding of the thermo-hydro-mechanical processes and material properties that affect how the gaps and canister) behave during and after installation in the ...

    Low and high-order hybridised methods for compressible flows 

    Vila Pérez, Jordi (Date of defense: 2021-02-10)

    The aerospace community is challenged as of today for being able to manage accurate overnight computational fluid dynamics (CFD) simulations of compressible flow problems. Well-established CFD solvers based on second-order ...

    A machine learning based methodology for anomaly detection in dam behaviour 

    Salazar González, Fernando (Date of defense: 2017-02-23)

    Dam behaviour is difficult to predict with high accuracy. Numerical models for structural calculation solve the equations of continuum mechanics, but are subject to considerable uncertainty as to the characterisation of ...

    Mathematical and computational modeling of flexoelectricity at mesoscopic and atomistic scales 

    Codony, David (Date of defense: 2021-03-01)

    This PhD thesis focuses on the development of mathematical and computational models for flexoelectricity, a relatively new electromechanical coupling that is present in any dielectric at the micron and sub-micron scales. ...

    Mathematical formulations of water mixing for reactive transport through heterogeneous media 

    Soler Sagarra, Joaquim (Date of defense: 2020-07-28)

    The study of transport of reacting solute through aquifers is relevant in many engineering fields. Reactive transport (RT) is complex because it consists of two phenomena, solute transport and chemical reactions, both of ...

    Measuring impact loads on rigid coastal structures 

    Marzeddu, Andrea (Date of defense: 2016-04-19)

    The aim of this work is the study of laboratory effects on the measurement of wave impact induced loads on rigid maritime structures. A high number of experiments (more then 4000 using regular wave attacks) have been carried ...

    Mechanical characterisation of masonry in existing structures by means of laboratory and in-situ experimental techniques 

    Cabané Cañas, Albert (Date of defense: 2023-05-17)

    (English) Masonry structures are among the most abundant construction typologies in the world, having been commonly built until the second half of the 20th century. The determination of the mechanical properties of these ...

    Mechanical performance and sustainability assessment of reinforced soil walls 

    Puig Damians, Ivan (Date of defense: 2016-07-28)

    Soil reinforced retaining wall structures are materiallymore efficientthan competing construction solutions such as gravity and cantilever walls. Nevertheless, the behaviour and interactions between the com ponent materials ...

    Mechanism and stochastic dynamics of transport in Darcy-scale heterogeneous porous media 

    Comolli, Alessandro (Date of defense: 2018-06-14)

    Solute transport in heterogeneous porous media in general exhibits anomalous behaviors, in the sense that it is characterized by features that cannot be explained in terms of traditional models based on the advection-dispersion ...

    The Mediterranean outflow water : transformations and pathways into the Gulf of Cádiz 

    Gasser i Rubinat, Marc (Date of defense: 2018-11-19)

    The Mediterranean Outflow Water (MOW) is a dense (¿>1028.5 kg/m3), saline (38.5 g/kg) ocean stream originated in the evaporative Mediterranean basin flowing westward past Espartel Sill as a fast (>1 m/s) and often unstable ...

    Mejora del diagnóstico y de la hemodinámica en la revascularización carotídea : aplicación de la dinámica de fluidos computacional mediante el OpenFOAM® y otras herramientas de libre distribución 

    Arias Araluce, Fausto Arturo (Date of defense: 2017-05-19)

    Stroke is a major cause of death and disability in Spain and in the Western world. It is often caused by an accumulation of atherosclerotic plaques on the walls of carotid arteries. Carotid revascularization may be the ...