Now showing items 1-20 of 142

    A Finite Element Model for Free Surface and Two Fluid Flows on Fixed Meshes 

    Coppola Owen, Herbert (Date of defense: 2009-06-19)

    Los flujos con interfaces móviles (problemas de superficie libres y de dos fluidos) aparecen en numerosas aplicaciones de ingeniería. Los métodos presentados en esta tesis están orientados principalmente a la simulación ...

    A finite Element model for incompressible flow problems 

    Codina Rovira, Ramon (Date of defense: 1992-06-30)

    A methodology for the design, implementation and evaluation of community and impact-based flood warnings 

    Meléndez Landaverde, Erika Roxana (Date of defense: 2023-11-13)

    (English) The present thesis focuses on developing, implementing, and evaluating a comprehensive community and impact-based early warning system (EWS) framework to support the protection actions of authorities and citizens ...

    A nanoscale study of dissolution and growth processes in cement hydrates 

    Rheinheimer, Vanessa (Date of defense: 2012-11-30)

    This thesis aims at providing new knowledge on the, otherwise poorly known, molecular-scale mechanisms that operate during hydration of cement phases and dissolution of their hydrates. In order to pursue this objective, a ...

    Adaptive hybrid discontinuous methods for fluid and wave problems 

    Giorgiani, Giorgio (Date of defense: 2013-04-02)

    This PhD thesis proposes a p-adaptive technique for the Hybridizable Discontinuous Galerkin method (HDG). The HDG method is a novel discontinuous Galerkin method (DG) with interesting characteristics. While retaining all ...

    Adaptive low and high-order hybridized methods for unsteady incompressible flow simulations 

    Karkoulias, Alexandros (Date of defense: 2020-06-17)

    Simulations of incompressible flows are performed on a daily basis to solve problems of practical and industrial interest in several fields of engineering, including automotive, aeronautical, mechanical and biomedical ...

    Advanced numerical techniques for inverse problems in geophysics 

    Ortega Gelabert, Olga (Date of defense: 2020-12-18)

    This thesis presents an efficient methodology to couple Model Order Reduction techniques within the framework of geophysical probabilistic inversion problems. Accurate models of the interaction between Earth inner processes ...

    Anàlisi de susceptibilitat torrencial en conques d’alta muntanya a partir de la proposta de paràmetres indicadors : construcció d'una base de dades multidisciplinària per al desenvolupament d'una zonificació de perillositat torrencial : cas específic d’Andorra 

    Riba Porras, Sergi (Date of defense: 2022-06-14)

    Over the last 40 years, in Europe in general and in many mountainous regions in particular, there have been major instances of severe flood episodes (more than 100) which have resulted in more than 700 deaths and billions ...

    Anàlisi quantitatiu de la velocitat dels vehicles a motor participants en atropellaments en zona urbana : modelització de la sensibilitat de la variable evitabilitat a les variacions de la velocitat específica del vehicle i de la velocitat màxima permesa de la via 

    Cabrerizo Sinca, Julián (Date of defense: 2017-09-07)

    Road traffic accidents lead to a number of significant problems, which are clearly reflected in the social costs (injuries, repercussions, deaths, etc.) and economic costs (prevention, healthcare, lost profits, etc.). This ...

    Análisis de las variables que inciden en la movilidad en vehículos motorizados de dos ruedas en la ciudad de Barcelona 

    Pérez Diez, Fernando (Date of defense: 2019-04-05)

    MOBILITY provides accessibility to people, goods, services and information, favoring the implementation of socio-economic activities. The more efficient mobility becomes, the greater human development and quality of life ...

    Análisis del ciclo de vida de productos derivados del cemento - Aportaciones al análisis de los inventarios del ciclo de vida del cemento. 

    Cardim de Carvalho Filho, Arnaldo (Date of defense: 2001-07-18)

    En esta tesis se estudian los efectos ambientales de la producción del cemento, incluyendo las diferentes etapas que componen su ciclo de vida, con objeto de estructurar y proponer las bases fundamentales de un Inventario ...

    Approximation of phase-field models with meshfree methods: exploring biomembrane dynamics 

    Peco Regales, Christian (Date of defense: 2014-10-28)

    Las biomembranas constituyen la estructura de separación fundamental en las celulas animales, y son importantes en el diseño de sistemas bioinspirados. Su simulación presenta desafíos, especialmente cuando ésta implica ...

    Assessing debris-flow hazard focusing on statistical morpho-fluvial susceptibility models and magnitude-frequency relationships. Application to the central-eastern Pyrenees 

    Chevalier, Guillaume G. (Date of defense: 2013-06-21)

    Occurrence of debris flows has received little attention in the Pyrenees, probably due to the small risk faced by most of the debris-flow prone sites in this mountain range. Nevertheless, the event of Biescas, which occurred ...

    Assessing the socio-economic impacts of flash floods for early warning at regional, national, and continental scales 

    Ritter, Josias Manuel Gisbert (Date of defense: 2021-07-16)

    Flash floods are one of the most devastating natural hazards, claiming numerous lives and tremendous economic losses. One of the main reasons for their catastrophic potential is the limited time available for precautionary ...

    Assessment of groundwater hydrology of the Quaternary aquifer of Lake Chad Basin 

    Salehi Siavashani, Nafiseh (Date of defense: 2023-07-07)

    (English) This thesis aims to enhance the conceptual model of the Lake Chad Basin's quaternary aquifer by gathering updated hydrological, geological, meteorological, and groundwater data. Objectives include analyzing natural ...

    Assessment of groundwater recharge in urban areas 

    Tubau Fernández, Isabel (Date of defense: 2016-02-04)

    In the city of Barcelona and the townships situated in the deltaic area of the Besòs River, groundwater is recognized as an aspect of urban water cycle management. There is groundwater seepage into infrastructure and ...

    Bedload transport of sand-gravel mixtures with antidunes: flume experiments 

    Núñez González, Francisco (Date of defense: 2012-07-20)

    In this thesis, the interaction between flow and sediment in alluvial channels is studied from an empirical approach, for conditions close or pertaining to supercritical flow, and for four types of sediment: sand, gravel ...

    Coastal risk forecast system : fostering proactive management at the Catalan coast 

    García León, Manuel (Date of defense: 2018-07-10)

    The action of sea storms is one of the most complex littoral processes with deep management implications. Along the Catalan shoreline which is about 700 km long, 190 km are subject to erosion and/or flooding. Around one ...

    Comportamiento hidráulico de aliviaderos escalonados sin cajeros laterales en presas de HCR 

    Estrella Toral, Soledad (Date of defense: 2013-10-17)

    Tradicionalmente la construcción de aliviaderos escalonados en presas de hormigón compactado con rodillo (HCR) se caracteriza por la presencia de muretes guías que imponen un ancho constante a lo largo del aliviadero y que ...