Now showing items 82-101 of 152

    Key challenges in the governance of rural water supply: lessons learnt from tanzania 

    Jiménez Fernández de Palencia, Alejandro (Date of defense: 2010-05-17)

    El primer objetivo de esta tesis es la identificación y análisis de aspectos clave para la gobernanza de los servicios de agua rural en países que adolecen de bajos niveles de cobertura, altos índices de pobreza, se ...

    Laboratory experiments to evaluate the joint effect between heterogeneity and head fluctuation on mixing, effective porosity and tailing 

    Castro-Alcalá, Eduardo (Date of defense: 2019-05-30)

    Tracer visualization in the laboratory at high spatial and temporal resolution can help advance the study of mixing processes. However, grain borders, fluctuations in lighting and non-uniform brightness contribute to produce ...

    Large scale finite element solvers for the large eddy simulation of incompressible turbulent flows 

    Colomés Gené, Oriol (Date of defense: 2016-03-31)

    In this thesis we have developed a path towards large scale Finite Element simulations of turbulent incompressible flows. We have assessed the performance of residual-based variational multiscale (VMS) methods for the ...

    Large-scale tree-based unfitted finite elements for metal additive manufacturing 

    Miranda Neiva, Eric (Date of defense: 2020-10-07)

    This thesis addresses large-scale numerical simulations of partial differential equations posed on evolving geometries. Our target application is the simulation of metal additive manufacturing (or 3D printing) with powder-bed ...

    Local scale air quality model system for diagnostic and forecasting simulations using the finite element method 

    Oliver Serra, Albert (Date of defense: 2015-11-13)

    Air pollution is an important topic with a great social impact; it is related with public health, environment and ecology, and climate change. Scientists have developed several models in the last thirty years, and regional ...

    Methodology for optimal design of efficient air transport network in a competitive environment 

    Trapote Barreira, César (Date of defense: 2015-12-16)

    This thesis aims to dissert about air transport network design taking into consideration the current needs about efficiency in a very competitive industry. The main focus for this work is the airline's point of view and ...

    Metodología para estimación del daño sísmico en edificios en base a modelos numéricos avanzados y monitorizaciones RAR 

    Cabrera Vélez, Esteban Marcelo (Date of defense: 2023-02-16)

    (English) In post-seismic scenarios, the rapid and safe evaluation of structural damage is essential to develop an effective response during the recovery, rehabilitation and reconstruction stages. The development of new ...

    Mixed finite elements with independent strain interpolation for isotropic and orthotropic damage 

    Barbat Vlad, Gabriel (Date of defense: 2021-02-11)

    The numerical modelling of fracture has been an active topic of research for over five decades. Most of the approaches employed rely on the use of the Finite Element Method, which has shown to be an effective and cost-efficient ...

    Mixing and speciation algorithms for geochemical and reactive transport problems 

    De Gaspari, Francesca (Date of defense: 2015-04-30)

    Geochemical and reactive transport modelling are essential tools in hydrogeology. They help to identify and assess geochemical processes occurring in applications such as groundwater contamination, water-rock interactions ...

    Model order reduction methods for sensor data assimilation to support the monitoring of embankment dams 

    Nasika, Christina (Date of defense: 2022-06-28)

    The latest monitoring and asset management technologies for large infrastructures involve digital representations that integrate information and physical models, exist in parallel to the real-life structures, and are ...

    Modelación hidrológica distribuida basada en esquemas de volúmenes finitos 

    Caro Camargo, Carlos Andrés (Date of defense: 2016-01-25)

    Distributed hydrological modeling occurs as a historical consequence of the different developments and advances in conceptual hydrology, first, through deepening and adaptation of hydrology through aggregated methods, and ...

    Modelación numérica integrada de los procesos hidráulicos en el drenaje urbano 

    Aragón Hernández, José Luis (Date of defense: 2013-07-02)

    El crecimiento continuo de las ciudades, o la ocurrencia de un evento extraordinario de lluvia, en muchas ocasiones sobrepasa las medidas de diseño de algunos de los elementos del drenaje urbano (principalmente elementos ...

    Modeling present and future freeway management strategies : variable speed limits, lane-changing and platooning of connected autonomous vehicles 

    Sala Sanmartí, Marcel (Date of defense: 2019-10-29)

    Freeway traffic management is necessary to improve capacity and reduce congestion, especially in metropolitan freeways where the rush period lasts several hours per day. Traffic congestion implies delays and an increase ...

    Modelling thermo-mechanical response of metal canister disposed in engineered barrier systems 

    Khadivipanah, Peiman (Date of defense: 2022-02-03)

    The main objective of this thesis is to describe and implement a rate-dependent (viscoplastic) constitutive equations for copper based canister using a single internal state variable and use it for modelling disposal schemes ...

    Modelo microestructural para medios granulares no saturados 

    Gili Ripoll, José Antonio (Date of defense: 1988-07-15)

    Se ha llevado a cabo:<br/><br/>A) Un estudio de las propiedades básicas del suelo no saturado (tipo limo) a escala microestructural, incluyendo esqueleto sólido, fase liquida y fase gaseosa. <br/><br/>B) Elaboración de un ...

    Monitoring water, sanitation and hygiene services : developing tools and methods to measure sustainable acces and practice at the local level 

    Giné Garriga, Ricard (Date of defense: 2015-11-21)

    Water and sanitation improvements together with good hygiene (WaSH) have well-known positive impacts on human development and poverty alleviation. However, universal access to safe drinking water and basic sanitation remains ...

    Monotonicity-preserving finite element methods for hyperbolic problems 

    Bonilla de Toro, Jesús (Date of defense: 2019-12-17)

    This thesis covers the development of monotonicity preserving finite element methods for hyperbolic problems. In particular, scalar convection-diffusion and Euler equations are used as model problems for the discussion in ...

    Multi-port container traffic analysis using Data Science tools: an application to Yangtze River Delta (China) 

    Huang, Dong (Date of defense: 2023-12-19)

    (English) As a crucial node of maritime transportation, seaports carry more than 90% of global trade. Considering the complexity of a port system, even slight improvement at strategical and operational decision levels will ...

    Multiscale subsurface characterization for geo-energy applications 

    Sciandra, Dario (Date of defense: 2024-02-09)

    (English) Geological Carbon Storage (GCS) holds immense promise for mitigating atmospheric CO2 emissions, making the sealing capacity of caprocks pivotal as storage scales up. Despite excellent sealing capacities observed ...

    Multivariate characterization of wave storms in coastal areas 

    Lin Ye, Jue (Date of defense: 2018-05-22)

    Wave-storms are the responsible of the main changes in the Coast. Their detailed characterization results in a better design of any marine structure. The most common approach to describe wave-storms is to simplify the event ...