Now showing items 108-127 of 129

    Síntesis de nanoparticulas multifuncionalizadas tipo Core-Shell mediante rutas quimicas 

    Flores García, Juan Carlos (Date of defense: 2022-06-20)

    In this thesis, the results of different core-shell structures are presented after having been synthesized by the modified Stöber method, results of UV-Vis, SEM, TEM, XRD, among others, are shown, which determined the ...

    Smart control of light in edge-emitting lasers 

    Medina Pardell, Judith (Date of defense: 2021-11-30)

    The invention of the laser triggered the study of light-matter interactions. In turn, the advent of artificial structured materials on micro- and nanometer scales has become a fruitful playground to tailor the propagation ...

    Solid-state studies on C60 solvates 

    Ye, Jin (Date of defense: 2017-11-23)

    This thesis focuses on the thermodynamic and crystallographic characterization of C60 solvates formed with small organic molecules (CBr2(CH3)2, CBr2Cl2, CBr2H2, CBrCl2H and CBrClH2) Chapter I provides an introduction ...

    Spacecraft state propagation and orbit determination using jet transport 

    Chen, Jianlin (Date of defense: 2021-04-23)

    The motion of space objects is strongly nonlinear and non-integrable since it is not only affected by the Keplerian central gravity of the Earth, but also subjected to some complex perturbations. Either an accurate and ...

    Spatio-temporal quality metrics for satellite SAR interferometric data 

    Wassie, Yismaw Abera (Date of defense: 2023-07-24)

    (English) The availability of RADAR images for monitoring Earth’s surface and its changes over time prompt the development of several interferometric SAR (InSAR) algorithms and methodologies. The Multi-temporal InSAR ...

    Spatiotemporal coordination of collective activity in neuronal ensembles 

    Barardi, Alessandro (Date of defense: 2016-06-03)

    The brain is a complex multiscale dynamical system made of neurons, connected with each other by synapses. Neurons are multidimensional nonlinear systems able to exhibit dynamical activities at different temporal and spatial ...

    Stochastic and complex dynamics in mesoscopic brain networks 

    Malagarriga i Guasch, Daniel (Date of defense: 2017-01-13)

    The aim of this thesis is to deepen into the understanding of the mechanisms responsible for the generation of complex and stochastic dynamics, as well as emerging phenomena, in the human brain. We study typical features ...

    Study of relaxation phenomena and local structure evolution in metallic glasses by means of Mössbauer and mechanical spectroscopy 

    Panahi, Seyedeh Leila (Date of defense: 2023-05-08)

    (English) New research shows that global demand for alloys with unique properties for various applications increased drastically, and among all them the demand for high entropy and metallic glasses in the industry is ...

    Study of the meteorological mechanisms controlling levels and transport processes of airborne pollen in the atmosphere 

    Majeed, Husam Tareq (Date of defense: 2018-10-05)

    Aerobiology is the science that focuses on the study of the airborne living organisms (bacteria, fungal spores, pollen, small insects, etc.). The influence of meteorology and climate change on plant phenology include shifts ...

    Suppression and control of modulation instability 

    Kumar, Shubham (Date of defense: 2017-06-21)

    Dynamical instabilities which lead to spontaneous pattern formation are present in a wide variety of nonlinear dynamical systems, both in nature as well as in technological areas. The instabilities may be saturating, leading ...

    Temporal correlations and dynamical transitions in semiconductor lasers with optical feedback 

    Quintero Quiroz, Carlos Alberto (Date of defense: 2017-03-16)

    Optical excitable systems that mimic neuronal behavior have potential to be building-blocks of novel, ultra-fast, neuron-inspired photonic information processing systems. In particular, semiconductor lasers with optical ...

    The future of free route in the European airspace : a study quantifying the cost-benefits and safety-cost of its implementation 

    Nava Gaxiola, Cesar Antonio (Date of defense: 2019-12-19)

    Free-route airs pace perm its us ers to freely plan a route between defined entry and exit waypoints with the pos s ibility of routing 1.fa intermediate points. Flights flyíng in a free-route area remain subject to air ...

    Theoretical and experimental investigation on the visible-light controlled functional properties in charged domain wall ferroelectrics 

    Ordoñez Pimentel, Jonathan (Date of defense: 2023-03-24)

    (English) Optical control of ferroelectric properties has been attracted a growing interest as an alternative to the conventional control by applied electric fields. However, the major drawback for achieving an effective ...

    Thermal diagnostics experiments for LISA Pathfinder 

    Gibert Gutiérrez, Ferran (Date of defense: 2016-02-23)

    The LISA Pathfinder project is an ESA/NASA technology demonstrator mission that must test the critical instrumentation required for a future space-borne gravitational wave observatory based on the LISA design. The satellite, ...

    Three-dimensional SPH simulations of the interaction between the nova ejecta and the companion star 

    Figueira, Joana (Date of defense: 2023-05-31)

    (English) Classical and Recurrent novae are thermonuclear explosions hosted by accreting white dwarfs in stellar binary systems. Material piles up on top of the white dwarf star under mildly degenerate conditions, driving ...

    Traffic synchronization with controlled time of arrival for cost-efficient trajectories in high-density terminal airspace 

    Sáez García, Raúl (Date of defense: 2021-10-01)

    The growth in air traffic has led to a continuously growing environmental sensitivity in aviation, encouraging the research into methods for achieving a greener air transportation. In this context, continuous descent ...

    Transitional coherent structures in shear and centrifugally driven flows 

    Wang, Baoying (Date of defense: 2023-09-21)

    (English) Turbulence is not only omnipresent in our daily lives but also in engineering applications. However, not until the middle of the XXth century researchers began to realize that simple, relatively large-scale ...

    Ubiquitous supercomputing : design and development of enabling technologies for multi-robot systems rethinking supercomputing 

    Camargo Forero, Leonardo (Date of defense: 2019-10-25)

    Supercomputing, also known as High Performance Computing (HPC), is almost everywhere (ubiquitous), from the small widget in your phone telling you that today will be a sunny day, up to the next great contribution to the ...

    Ultracold Bose and Fermi dipolar gases : a quantum Monte Carlo study 

    Bombín Escudero, Raúl (Date of defense: 2019-12-13)

    The object of study of this thesis are dipolar systems in the quantum degenerate regime. In general, dealing with many-body systems and evaluating their properties requires to deal with the the Schrödinger equation. In the ...

    Ultrafast quantum control of atoms and molecules : a density matrix approach 

    Afa, Iduabo John (Date of defense: 2018-01-24)

    Control is important for transferring theoretical scientific knowledge into practical technology for applications in numerous fields. This is why coherent control study is significant on every timescale to have a complete ...