Now showing items 18-37 of 130

    Contributions to high accuracy snapshot GNSS positioning 

    Liu, Xiao (Date of defense: 2022-11-10)

    (English) Snapshot positioning is the technique to determine the position of a Global Navigation Satellite System (GNSS) receiver using only a very brief interval of the received satellite signal. In recent years, this ...

    Contributions to ionospheric modeling with GNSS in mapping function, tomography and polar electron 

    Lyu, Haixia (Date of defense: 2020-11-17)

    This dissertation focuses on determining the vertical electron content distribution in low and high vertical resolution from ground-based and LEO on board GNSS data and improving the knowledge of ionosphere climatology in ...

    Contributions to multi-purpose GNSS positioning to support multi-frequency and multi-constellation with high accuracy and integrity 

    Ibáñez Segura, Deimos (Date of defense: 2023-10-23)

    (English) Global Navigation Satellite System (GNSS) have revolutionized location and timing technologies due to their low cost and wide availability. Initially, GNSS was limited to the american Global Positioning System ...

    Contributions to real-time monitoring of the ionosphere using GNSS signals 

    Timoté Bejarano, Cristhian Camilo (Date of defense: 2023-03-27)

    (English) This document presents the collection of four manuscripts published during my Doctoral academic formation, which main goal has been the real-time implementation of tools to monitor the ionosphere using Global ...

    Correlations in spin-orbit coupled ultracold quantum gases 

    Sánchez Baena, Juan (Date of defense: 2020-12-14)

    The main goal of this thesis is the computation of ground state properties of quantum many-body systems under Spin Orbit coupling (SOC) interactions out of the ultradilute regime. We present two approaches to fulfill this ...

    Corrosion studies on Cu-based alloys 

    Xie, Chenyang (Date of defense: 2021-01-08)

    Cu-based alloys are widely applied in corrosive environments. The improvement of the alloys' corrosion resistance will significantly reduce energy consumption and overexploitation of resources. To increase the resistance ...

    Cost-based linear holding practice and collaborative air traffic flow management under trajectory based operations 

    Xu, Yan (Date of defense: 2018-11-20)

    The current air transportation system is reaching the capacity limit in many countries/regions across the world. It tends to be less efficient or even incapable sometimes to deal with the enormous air traffic demand that ...

    Counter a drone via deep reinforcement learning 

    Çetin, Ender (Date of defense: 2023-08-30)

    (English) Unmanned aerial vehicles (UAV) also known as drones have been used for a variety of reasons such as surveillance, reconnaissance, shipping and delivery, etc. and commercial drone market growth is expected to reach ...

    Coupling and stochasticity in mesoscopic brain dynamics 

    Jedynak, Maciej (Date of defense: 2017-03-27)

    The brain is known to operate under the constant influence of noise arising from a variety of sources. It also organises its activity into rhythms spanning multiple frequency bands. These rhythms originate from neuronal ...

    Cylindrical microplane model for fiber reinforced polymer composites 

    Sabounchi, Saeed (Date of defense: 2023-04-13)

    (English) Fiber-reinforced polymers (FRPs) are the most used composite materials in many applications, from broom handle to the main structure of advanced aircraft. Despite the enormous research done on these materials, ...

    Data-driven neural mass modelling 

    Escuain i Poole, Lara Sofia (Date of defense: 2019-03-28)

    The brain is a complex organ whose activity spans multiple scales, both spatial and temporal. The computational unit of the brain is thought to be the neurone. At the microscopic level, neurones communicate via action ...

    Decolourization of textile wastewater by manganese-aluminium metallic particles 

    AboliGhasemabadi, Mitra (Date of defense: 2019-07-10)

    Waste treatment is an important aspect of an industry. Organic dyes are used in many fields, such as textile, paper or food. Residual dye compounds from these industries are one of the most critical sources of environmental ...

    Deep learning techniques for demand-capacity balancing 

    Mas Pujol, Sergi (Date of defense: 2023-05-12)

    (English) Nowadays Air Navigation Service Providers (ANSPs) have to handle and accommodate a continuously increasing traffic demand in a scenario that is expected to be more time-efficient and cost-efficient. Meeting the ...

    Desarrollo y aplicación de herramientas de valoración de riesgos tecnológicos en centrales nucleares españolas a partir de la técnica de "Análisis Probabilista de Seguridad" 

    Díaz Bayona, Pedro (Date of defense: 2018-04-06)

    The PhD thesis "Desarrollo y aplicación de herramientas de valoración de riesgos tecnológicos en centrales nucleares españolas a partir de la técnica de Análisis Probabilista de Seguridad” results from the research projects ...

    Design of the BELEN detector for wide energy range with flat and high detection efficiency 

    Riego Pérez, Albert (Date of defense: 2016-05-30)

    The main objective of this work is to design the BEta-deLayEd Neutron detector (BELEN) detector for FAIR (Facility for Antiproton Ion Research). The purpose of this detector is the measurement of neutron emission probabilities ...

    Development and interactions of surfzone morphological patterns 

    de Swart, Rinse Leendert (Date of defense: 2022-07-19)

    A variety of morphodynamic patterns are typically present in the nearshore zone of sandy beaches that develop due to the interactions between waves, currents and the morphology. The most common are one or several nearshore ...

    Development of a solid state amplifier for the 3rd harmonic cavity for ALBA synchrotron light source 

    Hazami, Zahra (Date of defense: 2020-01-29)

    In Synchrotron Light Source facilities with high energy and low emittance electron beams different techniques for improving the quality of the synchrotron light for the users are applied. With this aim ALBA, the Spanish ...

    Development of AINA code for the study of loss of plasma control events in ITER and DEMO, and contribution to the systems study of DEMO 

    Rivas Reguera, José Carlos (Date of defense: 2016-01-01)

    Magnetic fusion is a long term, worldwide research activity. Plans are increasingly ambitious, cooperation is progressing, and goals seem to be closer every year. ITER reactor is being built, and several conceptual studies ...

    Development of the new AINA code and its application to the Safety Analysis of the European DEMO designs 

    Baeza Pérez, Eduard (Date of defense: 2019-07-22)

    A conclusion that can be drawn from the historical safety analyses developed for tokamaks fusion reactors is that some of the major risks involve incidents in the vacuum vessel. In order to evaluate plasma evolution and ...

    Dielectric spectroscopy studies of low-disorder and low-dimensional materials 

    Tripathi, Pragya (Date of defense: 2016-11-17)

    In this thesis we employ dielectric spectroscopy (in different implementations) to study the dielectric properties of different materials ranging from completely disordered supercooled liquids to low-disorder solids with ...