Now showing items 57-76 of 128

    Galileo broadcast ephemeris and clock errors, and observed fault probabilities for ARAIM 

    Alonso Alonso, María Teresa (Date of defense: 2023-03-03)

    (English) The characterization of Clock and Ephemeris error of the Global Navigation Satellite Systems is a key element to validate the assumptions for the integrity analysis of GNSS Safety of Life (SoL) applications. ...

    Global ionospheric maps : estimation and assessment in post-processing and real-time 

    Roma Dollase, David (Date of defense: 2019-04-09)

    The research of this paper-based dissertation is focused on Global Ionospheric Maps (GIM) generation and assessment. In summary, the novelty and thematic unity in this works relies on four different but complementary topics: ...

    GNSS-based global ionospheric maps : real-time combination, time resolution and applications on space weather monitoring 

    Liu, Qi (Date of defense: 2022-04-14)

    The research of this paper-based dissertation is focused on the Global Ionospheric Maps (GIMs) based on Global Navigation Satellite System (GNSS) including real-time combination, validation, time resolution and applications. ...

    Guest-molecule dynamics and conductivity effects in carbon-based molecular solids 

    Mitsari, Efstratia (Date of defense: 2016-07-28)

    Disordered systems are abundant in everyday life and so their study is of importance from a scientific and a technological point of view. The most common non-crystalline solid phases are structural glasses (e.g. window ...

    Heat transfer correlations for liquid metal flows under nuclear fusion conditions 

    Suárez Cambra, Daniel (Date of defense: 2023-07-06)

    (English) This thesis focuses on modeling the circulation of liquid metal through the breeding blanket channels of a tokamak fusion reactor. Apart from extracting the heat produced by the nuclear reactions of the plasma, ...

    High-fidelity numerical simulations of reacting flows with tabulated chemistry 

    Both, Ambrus (Date of defense: 2023-06-29)

    (English) In the transition to net-zero carbon emission technologies, turbulent combustion is expected to retain an important role in various applications. In particular, the aviation industry is projected to widely adapt ...

    High-order hybridizable discontinuous Galerkin method for viscous compressible flows 

    Javadzadeh Moghtader, Mostafa (Date of defense: 2016-11-04)

    Computational Fluid Dynamics (CFD) is an essential tool for engineering design and analysis, especially in applications like aerospace, automotive and energy industries. Nowadays most commercial codes are based on Finite ...

    A high-performace computing tool for partitioned multi-physics applications 

    Zavala-Aké, J. Miguel (Date of defense: 2018-09-13)

    The simulation and modelling of complex applications involving the interaction of processes governed by different physical principles is addressed in this thesis. The interaction of a fluid with a deformable body, or the ...

    Hilbert analysis of air temperature dynamics 

    Zappalà, Dario (Date of defense: 2019-04-04)

    The dynamics of the climate system plays a crucial role in the sustainability of life on Earth, and this motivates research to understand and characterise our climate and predict its evolution. In this thesis we focus on ...

    Historical copper and iron coloured glazes and glasses 

    Yuan, Mingyue (Date of defense: 2023-11-17)

    (English) Coloured glazes and glasses have attracted human interest since antiquity for their aesthetic appeal and multiple functionalities. As indicators of technological progress, artistic expression, and social ...

    Historical review of fire safety at NPP and application of fire PSA to Westinghouse PWR NPP in the frame of risk-informed decision making by 

    Asamoah, Matthew (Date of defense: 2018-10-05)

    The importance of fire as a potential initiator of multiple-system failures took on a new perspective after the cable-tray fire at Browns Ferry in 1975 The review have shown that the first generation Nuclear Power Plant ...

    Hybrid non-destructive technique for volumetric defect analysis and reconstruction by remote laser induced ultrasound 

    Selim, Hossam (Date of defense: 2020-07-21)

    This PhD thesis is devoted to the design, development and implementation of a non-contact hybrid non-destructive testing (NDT) method applied to the analysis of metallic objects that contain embedded defects or fractures. ...

    Hydrodynamic models of accretion onto rotating compact stars 

    Martín Rodríguez, José David (Date of defense: 2023-07-07)

    (English) Hydrodynamic models are essential for our understanding of the physics of stellar explosions, and specifically, for their potential contribution to the Galactic chemical abundances. In this Work, a one-dimensional ...

    Impulse maneuver design for a solar sail spacecraft in the restricted three-body problem framework 

    Duan, Xun (Date of defense: 2023-05-10)

    (English) A solar sail is a method of spacecraft propulsion that uses only the solar radiation pressure (SRP). The main research object of this thesis is a solar sail spacecraft in the artificially created libration point ...

    An integrated framework for trajectory optimisation, prediction and parameter estimation for advanced aircraft separation concepts 

    Vilardaga García-Cascón, Santi (Date of defense: 2019-11-25)

    Since the birth of commercial aviation, the applications and benefits of aircraft have grown immensely. This, in perfect synchrony with the average increase of purchasing power of the society, has rocketed the number of ...

    Ion binding landscapes and molecular dynamics of phospholipid membranes 

    Yang, Jing (Date of defense: 2015-12-11)

    This thesis aims at studying the physical-chemical properties of model lipid bilayers in physiological environments. Since in such conditions biological membranes composed of phospholipids and cholesterol are surrounded ...

    ISFAA : Implicit SPH for astrophysical apllications 

    Escartín Vigo, José Antonio (Date of defense: 2016-01-21)

    Computational simulation is one of the basic techniques of modern Astrophysics. The long-term time astrophysical processes cannot be treated with explicit approaches because that they are limited, in their maximum time ...

    Large-scale CFD and micro-particles simulations in a large human airways under sniff condition and drug delivery application 

    Calmet, Hadrien (Date of defense: 2020-11-10)

    As we inhale, the air drawn through our nose undergoes successive accelerations and decelerations as it is turned, split, and recombined before splitting again at the end of the trachea as it enters the bronchi. Fully ...

    Light beam propagation in complex crystals 

    Kumar, Nikhil P. (Date of defense: 2017-07-13)

    Recent advancement in Photonics have brought about a new era of miniaturisation. Along came a need for technology to allow the manipulation of light at the micrometer scale, with precise control over beam propagation. The ...

    Light management in non-Hermitian systems 

    Ahmed, Waqas Waseem (Date of defense: 2018-04-17)

    The quest for new artificial structures and materials uncovers novel new light-matter interactions, and intriguing physical phenomena. Since the late 80’s purely dielectric materials have been structured, at the wavelength-scale, ...