Now showing items 222-241 of 352

    Monitoring and analysis of soil-vegetation-atmosphere interactions at slope and catchment scale : Implications for mass-wasting in natural and man-made slopes 

    Oorthuis Gómez, Raül (Date of defense: 2022-07-19)

    Slope mass-wasting (SMW) due to shallow landslides or debris flows is one of the most important erosional processes in many mountainous regions together with surficial erosion by rainfall runoff. These erosive processes ...

    Monitorización de estructuras de hormigón mediante sensores de fibra óptica distribuida 

    Rodríguez Gutiérrez, Gerardo (Date of defense: 2017-07-03)

    This doctoral thesis presents the use of an opto-electronic system so-called OBR (Optical Backscattered Reflectometer) as an alternative of measurement in structural health monitoring (SHM) processes in concrete structures, ...

    Morpho-functionality of the toothed whale external ear canal 

    de Vreese, Steffen (Date of defense: 2021-06-17)

    While marine, anthropogenic noise pollution is a scientific and societal matter of concern, there is limited knowledge on how sea animals, particularly cetaceans, perceive their environment through sounds. Toothed whales, ...

    MPM modelling of landslides in brittle and unsaturated soils 

    Yerro Colom, Alba (Date of defense: 2015-11-10)

    Landslides and slope instabilities represent one of the most important problems in geotechnics causing significant damages around the world every year. Understanding the mechanics of the whole process is of particular ...

    Multi-scale topological design of structural materials : an integrated approach 

    Ferrer Ferré, Àlex (Date of defense: 2017-05-26)

    The present dissertation aims at addressing multiscale topology optimization problems. For this purpose, the concept of topology derivative in conjunction with the computational homogenization method is considered. In ...

    Multirate mass transfer and biofilm growth modeling in porous media 

    Wang, Jingjing (Date of defense: 2021-07-23)

    Reactive transport modeling is a methodological tool to study the coupled physical, chemical and biological processes in Earth system. It is complex not only because of the nature of the equations, but also because of the ...

    Multiscale multiphysics simulation in composite materials 

    Zaghi, Stefano (Date of defense: 2019-01-21)

    The improvements in terms of computational power provides the capability to analyze with more detail the materials behavior. On one hand, going deeper in the materials to study an increasingly smaller dimension and capture ...

    Natural and anthropogenic control of water quality of an Amazon estuary : the Caeté estuary (Brazil) 

    Monteiro, Marcela Cunha (Date of defense: 2017-04-04)

    In the Amazon region, few data are available on the impacts caused by the urban settlements found in the proximity of estuaries. In the estuary of the Caeté River, the focus of the present study, the nutrient input is ...

    New approach for efficient design of stainless steel RHS and SHS elements 

    Arrayago Luquin, Itsaso (Date of defense: 2016-10-17)

    This thesis investigates the cross-section and member behaviour of cold-formed stainless steel RHS and SHS elements and proposes an alternative and more efficient design approach. Combined with aesthetic appeal, exceptional ...

    New design considerations for seismic isolated buildings in Colombia 

    Piscal Arévalo, Carlos Mario (Date of defense: 2018-10-22)

    An important percentage of Colombian population is located in medium-to-high seismicity zones (NSR-10, 2010). Therefore, it is important to protect the buildings, principally the highly crowded ones, and those that are ...

    New insights on the fundamentals and modeling of the external sulfate attack in concrete structures 

    Ikumi Montserrat, Tai (Date of defense: 2017-10-30)

    The external sulfate attack (ESA) is a complex degradation process typically compromising the durability of underground foundations, nuclear or industrial waste containments and tunnel linings exposed to sulfate solutions. ...

    New observational approaches for optically complex waters based on high-resolution transmissometry 

    Ramírez Pérez, Marta (Date of defense: 2017-06-09)

    There is a growing concern for protection and conservation of coastal ecosystems, which require a proper understanding of ecosystem dynamics and the ability to detect and predict changes in the ecosystem state. For this ...

    Non-linear finite element analysis oriented to optimisation of fibre reinforced concrete structures 

    Nogales Arroyo, Alejandro (Date of defense: 2022-04-11)

    The construction industry is one of the industrial sectors with the largest output worldwide and, thus, of great economic interest. In this sector, reinforced concrete plays a significant role since it is one of the most ...

    Nuevas aproximaciones toxicológicas para la detección de disruptores endocrinos y lipídicos en ecosistemas mediterráneos y sistemas celulares 

    Blanco Rubio, María (Date of defense: 2018-03-20)

    Chemical compounds derived from human activities continuously reach aquatic systems, where they are available to the organisms that inhabit them. Traditionally, environmental risk assessment has been based on the chemical ...

    Nuevo concepto de puente de vigas hinchables ligero, modular y portátil 

    Estruch i Tena, Carles (Date of defense: 2016-07-13)

    We propose to develop, build and validate a new Concept of Bridge composed of Inflatable Beams, Lightweight, Modular and Portable (PVH-LMP) for surface transport vehicles, which uses pressurized air-filled beams made of ...

    Numerical analysis of particle-laden flows with the finite element method 

    Casas González, Guillermo (Date of defense: 2018-10-30)

    In this work we study the numerical simulation of particle-laden fluids, with a focus on Newtonian fluids and spherical, rigid particles. We are thus dealing with a multi-phase (more precisely, a multi-component) problem, ...

    Numerical analysis of railway ballast behaviour using the Discrete Element Method. 

    Irazábal González, Joaquín (Date of defense: 2017-10-06)

    The development of high-speed train lines has increased significantly during the last twenty-five years, leading to more demanding loads in railway infrastructures. Most of these infrastructures were constructed using ...

    Numerical modeling of cracking along non-preestablished paths 

    Crusat Codina, Laura (Date of defense: 2018-11-05)

    The general objective of this thesis is the numerical representation of discrete cracks and their propagation using concepts of Configurational Mechanics, in such a way that their trajectory really corresponds to an energy ...

    Numerical modeling of geological carbon sequestration : enhanced dissolution in randomly heterogeneous media 

    Wang, Yufei (Date of defense: 2022-07-11)

    Geological Carbon Sequestration (GCS) plays a major role in mitigating the global warming due to the increasing concentration of CO2 in atmosphere. It is important to understand the GCS process to analyze and predict its ...

    Numerical modeling of the underwater acoustic impact of offshore stations 

    Hospital Bravo, Raúl (Date of defense: 2021-07-05)

    The design of offshore power stations (for wind, wave or tidal energy generation) requires assessing their environmental impact. In particular, it is of the major importance to predict the impact of the generated subsea ...