Now showing items 241-260 of 341

    On the evaluation of mixing in heterogeneous porous media: from laboratory characterization to the design of engineered chaotic flows for practical application 

    Bertran Oller, Oriol (Date of defense: 2023-07-11)

    (English) Groundwater is now under high stress levels and its quality and quantity arise as one of the most interesting and necessary topics our community should address. This doctoral thesis is focused on the quality of ...

    On-line coupling of volcanic ash and aerosols transport with global and regional meteorological models 

    Martí Donati, Alejandro (Date of defense: 2017-07-14)

    Explosive volcanic eruptions can eject large quantities of particulate matter that, along with other aerosol droplets and trace gases, are carried upwards into the atmosphere by the buoyant eruption column and then dispersed ...

    An onto-phylogenetic journey through the life history of flying squids (Cephalopoda: Ommastrephidae) 

    Fernández Álvarez, Fernando Ángel (Date of defense: 2018-05-03)

    Flying squids develop all its life cycle in the water column, as planktonic paralarvae and then as nektonic subadults and adults. In this Ph. D. Thesis, light was shed over several poorly understood aspects of the ontogeny ...

    Opening the black box of coastal inshore waters in the NW Mediterranean Sea : environmental quality tools and assessment 

    Flo Arcas, Eva (Date of defense: 2017-11-20)

    Coastal inshore waters (CIW) are defined as the area of coastal waters between 0 and 200 m from the shoreline. They only represent < 1% of coastal waters, even though they are of main ecological, social, and economic ...

    Optimal irrigation scheduling combining water content sensors and remote sensing data 

    Fontanet i Ambròs, Mireia (Date of defense: 2019-11-25)

    By 2025, the Food and Agriculture Organization of the United Nations predicts that two-thirds of the world population will experience water stress conditions. In addition, it is expected that world population will increase ...

    Optimazation of marine sediments characterization via statistical analysis 

    Collico, Stefano (Date of defense: 2022-06-13)

    The task of geotechnical site characterization includes defining the layout of ground units and establishing their relevant engineering properties. This is an activity in which uncertainties of different nature (inherent, ...

    Optimización de la reología de componentes fotocatalíticos para aplicaciones avanzadas en elementos de fachada 

    Elkoro Ugarteburu, Ander (Date of defense: 2018-10-26)

    This thesis discusses the development of a new methodology for 3D printing of TiO2 nanoparticles and its applications in air purification and hydrogen production. A dosage has been obtained that allows 3D printing by DIW ...

    Optimization of design procedures and quality control for FRC 

    Galeote Moreno, Eduardo (Date of defense: 2018-12-14)

    Fibre reinforced concrete (FRC) presents objectively proven advantages in terms of post-cracking strength and manufacturing procedures. As a result, FRC with structural responsibility is increasingly being used in the ...

    A particle finite element method for fluid-related problems in civil engineering 

    Celigueta Jordana, Miguel Ángel (Date of defense: 2019-11-14)

    The work presented in this Thesis is a set of developments focused on the Particle Finite Element Method (PFEM) and its applicability in several fields in Civil Engineering. The PFEM had already been proven to be a powerful ...

    Particle model for crushable aggregates which includes size, time and relative humidity effects 

    Tapias Camacho, Mauricio Alberto (Date of defense: 2016-12-21)

    This thesis presents a study of the mechanical behaviour of coarse-crushable aggregates, using the discrete element method (DEM). A novel DEM model has been developed taking into account particle breakage, the influence ...

    Performance of distributed optical fiber sensors embedded inside reinforced concrete structural elements. 

    Bado, Mattia Francesco (Date of defense: 2021-07-26)

    The employment of a novel cutting edge strain monitoring technique named Distributed Optical Fiber Sensors (DOFS) as Structural Health Monitoring (SHM) tools is becoming increasingly common. Its popularity can be attributed ...

    Physical, geochemical and microbial parameters driving the improvement of water quality in managed aquifer recharge 

    Barba Ferrer, Carme (Date of defense: 2018-11-16)

    Worldwide water demand has been increasing over time, mainly due to population growth and society development. In addition, climate change is causing a significant alteration of the periodicity and intensity of precipitation ...

    Population dynamics, interactions and evolution of marine microbes using genomic approaches 

    Latorre Pérez, Francisco (Date of defense: 2023-02-03)

    (English) There is a myriad of microorganisms on Earth contributing to global biogeochemical cycles. In the surface ocean, the smallest microbes (picoplankton) are responsible for an important fraction of the total atmospheric ...

    Probabilistic characterization of single and concurrent metocean variables of Mexican coasts with seasonal variability using extreme value theory, with application to reliability of coastal structures 

    Calderón Vega, Felícitas (Date of defense: 2021-04-20)

    This thesis encompasses a set of different subjects related to metocean variables but studied from different perspectives. The metocean variables are mainly significant wave heights and wind velocities and, to a lesser ...

    Production of carbohydrates and polyhydrohybutyrate by cyanobacteria grown in wastewater 

    Arias, Dulce María (Date of defense: 2018-09-28)

    Cyanobacteria are prokaryotic aerobic photosynthetic microorganisms with the capacity to remove nutrients from wastewater and synthesize a large variety of bioactive compounds and valuable byproducts. Among those valuable ...

    Productos de cuidado personal en el medio ambiente : presencia, destino y efectos 

    Molins Delgado, Daniel (Date of defense: 2017-12-01)

    In this PhD. Thesis the results of eleven studies about the presence, distribution, and effects of personal care products (PCPs) in the environment are presented with the intention of giving a consolidated vision and to ...

    Proper generalized decomposition solutions for composite laminates parameterized with fibre orientations for fast computations 

    El-Ghamrawy, Karim (Date of defense: 2021-04-23)

    Composite materials are gaining popularity as an alternative to classical materials in many different applications. Moreover, their design is even more flexible due to the potential of additive ...

    Propuesta metodológica para estimar N2O en inventarios de emisión y evaluaciones de eco-eficiencia en plantas de tratamiento de aguas residuales 

    Ramírez Melgarejo, Monserrat G. (Date of defense: 2021-02-26)

    A wastewater treatment plant (WWTP) is a system that aims to reduce the negative impact to bodies of water where the effluent is discharged. reducing the pollutants discharged. Treatment plants have an impact on the ...

    Randomized linear algebra for model order reduction 

    Balabanov, Oleg (Date of defense: 2019-10-11)

    Solutions to high-dimensional parameter-dependent problems are in great demand in the contemporary applied science and engineering. The standard approximation methods for parametric equations can require computational ...