Ara mostrant els elements 188-207 de 353

    Large-scale biogeography of marine pelagic bacteria and archaea 

    Salazar Guiral, Guillem (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 (Data de defensa: 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 ...

    Methodology for seismic vulnerability assessment of existing masonry buildings in urban centres. Application to the Eixample district in Barcelona 

    Dimovska, Sara (Data de defensa: 2023-05-26)

    (English) Unreinforced masonry buildings (URM), which prevail in many historic and urban centres, can be considered to be significantly vulnerable to seismic actions due to their peculiar constructive and structural features ...

    Microalgae harvesting in wastewater treatment plants : application of natural techniques for an efficient flocculation 

    Gutiérrez Martínez, Raquel (Data de defensa: 2016-05-03)

    Research of new sources of bioenergy is nowadays driving attention to microalgae. Cost-effective biomass harvesting poses a challenge for full-scale microalgae production for biofuels. In the context of wastewater treatment ...

    Microalgae in aquaculture wastewater : a new forecasting method of production in a marine system 

    Andreotti, Valeria (Data de defensa: 2019-07-12)

    In the field of aquaculture, the main microalgae application is animal nutrition, in which they can be used as an unprocessed component, or as dried material for feed preparations. Moreover, microalgae can assimilate the ...

    Microalgae-based wastewater treatment systems at demonstrative scale : gravity harvesting and thickening of biomass, and advanced design of bioreactors 

    Ortiz Ruiz, Antonio (Data de defensa: 2021-12-17)

    Microalgae culture is currently receiving considerable attention for its potential in wastewater treatment and production of algal biomass from which high-value bioproducts and bioenergy can be obtained, as well as the ...