Now showing items 2381-2400 of 5539

    Experimental and numerical study of the effect of stress on ASR expansions in concrete 

    Liaudat, Joaquín (Date of defense: 2018-06-15)

    This thesis aims at deepening in the understanding of the mechanisms by which the stress state affects the development of concrete expansions and cracking due to the Alkali-Silica Reaction (ASR). With this purpose, a ...

    Experimental and numerical study of the structural effects of steel corrosion in continuous RC beams 

    Fernández Pérez, Ignasi (Date of defense: 2015-07-20)

    Many reinforced concrete structures suffer damage due to aging and due to the environmental agressivity, thus affecting their serviceability performance and safety. Structural evaluation of a deteriorated structure is ...

    Experimental and numerical study of the symbolic dynamics of modulated semiconductor lasers with optical feedback 

    Torrentino, Taciano (Date of defense: 2015-07-10)

    The goal of this thesis is to investigate the influence of current modulation in the dynamics of the low-frequency fluctuations (LFF) regime induced by optical feedback in semiconductor lasers. In this regime the laser ...

    Experimental and theoretical analysis of cracking in drying soils 

    Lakshmikantha, M.R. (Date of defense: 2009-06-12)

    The thesis focuses on the experimental and theoretical aspects of the process of cracking in drying soils. The results and conclusions were drawn from an exhaustive experimental campaign characterised by innovative ...

    Experimental and theoretical analysis of flow and sediment transport in 90-degree fluvial diversions. 

    Herrero Casas, Albert (Date of defense: 2013-06-07)

    Fluvial bifurcations are systems that have a great influence on human society. Their formation and evolution can affect to activities as agriculture or industry and a good knowledge of the mechanisms that affect the processes ...

    Experimental characterization and diagonosis tools for proton exchange membrane fuel cells 

    Primucci, Mauricio (Date of defense: 2012-09-10)

    A fuel cell is a device that gives electric power directly from electrochemical reduction and oxidation reactions. PEM fuel cells present some properties that make them appropriate for portable and transport applications: ...

    Experimental characterization of turbulance in steep rough streams 

    Fernández López, Cristina (Date of defense: 2019-02-01)

    Torrential flows have so far been studied less than have river flows, due to the difficulty of faithfully reproducing them in the laboratory, and the few field measurements available. For this reason, this present research ...

    Experimental design and verification of a centralized controller for irrigation canals 

    Bonet Gil, Enrique (Date of defense: 2015-03-26)

    This thesis aims to develop a predictive control for irrigation canals to improve the management of water resources. Water is necessary for life and it is a scarce good that we need for drinking, in the agriculture, etc. ...

    Experimental estimation of soil emissivity and its application to soil moisture retrieval in the SMOS Mission 

    Monerris Belda, Alessandra (Date of defense: 2009-09-07)

    Tot i que l'aigua retinguda pel sòl constitueix una petita fracció del volum total d'aigua que hi ha a la Terra, l'humitat del sòl juga un paper important als models climàtics i hídrics. La radiometria en banda L (1.400 a ...

    Experimental evidence for the quantum condensation of ultracold dipolar excitons 

    Alloing, Mathieu (Date of defense: 2014-05-28)

    In this thesis, we report experimental evidence of a "gray" condensate of excitons, as predicted theoretically by M. Combescot et al. Most importantly, the condensate is characterized by the macroscopic population of dark ...

    Experimental investigation of induced supersonic boundary layer transition 

    Bottini, Henny (Date of defense: 2014-03-28)

    Turbulence onset within an initially laminar flow is one of the most common phenomenon in Fluid Mechanics, yet is an open field of research. This is due to the many and diverse causes that can trigger turbulence, which ...

    Experimental study and numerical modelling of soil-roots hydro-mechanical interactions 

    Fraccica, Alessandro (Date of defense: 2019-12-09)

    The thesis is aimed at characterising the multi-scale and hydro-mechanical behaviour of lightly compacted silty sand penetrated by a turf-grass (Cynodon Dactilon). The study will allow better assessing the impact of ...

    Experimental study of feedback-induced dynamics in semiconductor lasers : from symbolic analysis to subwavelength position sensing 

    Aragoneses Aguado, Andrés (Date of defense: 2014-06-18)

    The aim of this thesis is the study of the dynamics induced by optical feedback in semiconductor lasers. This study aims, on the one hand, to improve our knowledge of stocahstic complex systems, and on the other hand, to ...

    Experimental study of speckle generated by semiconductor light sources: application in double pass imaging 

    Halpaap, Donatus (Date of defense: 2019-12-09)

    With the double pass (DP) technique it is possible to quantify the optical quality of a patient's eye by measuring its point spread function. Due to the low reflectivity of the retina a high-intensity, point-like illumination ...

    Experimental study on microstructure and structural behaviour of recycled aggregate concrete 

    Etxeberria Larrañaga, Miren (Date of defense: 2004-06-18)

    The use of recycled aggregates in concrete opens a whole new range of possibilities in the reuse of materials in the building industry. This could be an important breakthrough for our society in our endeavours towards ...

    Experimental tools for quantum networking operations with single photons and sinlge ions 

    Huwer, Jan Henning (Date of defense: 2014-01-29)

    One promising approach for future quantum networks is the combination of strings of trapped ions as quantum-information processors with entangled photon pairs produced by spontaneous parametric down conversion (SPDC) to ...

    Experimental validation of optimal real-time energy management system for microgrids 

    Marzband, Mousa (Date of defense: 2014-01-20)

    Nowadays, power production, reliability, quality, efficiency and penetration of renewable energy sources are amongst the most important topics in the power systems analysis. The need to obtain optimal power management and ...

    Experimental velocity profile distribution characterization of mountain rivers 

    Marin-Esteve, Blanca (Date of defense: 2023-05-18)

    (English) The aim of this thesis is to improve our understanding of the behaviour of mountain rivers and to predict their morphological functioning under conditions of low relative submergence. Mountain rivers have received ...

    Experiments de flux i sedimentació de llim fi 

    Capapé Miralles, Sergi (Date of defense: 2017-05-18)

    Research on fine sediment transport (silt and clay) is less advanced than research on sand and gravel movement. Nevertheless, fine sediment can be the predominant fraction of the suspended load in some rivers, and its ...

    Explicit integration of some integrable systems of classical mechanics 

    Basak Gancheva, Inna (Date of defense: 2011-11-28)

    The main objective of the thesis is the analytical and geometrical study of several integrable finite-dimentional dynamical systems of classical mechanics, which are closely related, namely: - the classical generalization ...