Física: Últimas Submissões
Resultados 41-50 de 827
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Elucidating the electronic nature of the Strong Metal-Support Interaction (SMSI) effect
(2022) [Tese]As industrial interest turned to the development of petrochemical processes, the investment in the development of the heterogeneous catalysis field increased. Nevertheless, classical catalysts still present unsettled ... -
Multicritical points in a model for 5f-electron systems under pressure and magnetic field
(2022) [Tese]We investigate the evolution of multicritical points under pressure and magnetic field in a model described by two 5f-bands (labeled as and) that hybridize with a single itinerant conduction band. This model is called ... -
A mean-field method for generic conductance-based integrate-and-fire neurons with finite timescales
(2022) [Dissertação]The construction of transfer functions in theoretical neuroscience plays an important role in determining the behavior of the spiking rate of neurons in networks. They can be obtained by a variety of fitting methods where ... -
Development of an ultrasensitive technique for optical characterization measurements
(2022) [Dissertação]We review the mathematical structure used in quantum mechanics (namely vector spaces) to show how the property of non-separability arises. In this context, non-separability is called quantum entanglement, and we explore ... -
Magnetic white dwarfs rich in hydrogen
(2021) [Dissertação]The way to understand nature and its laws is through the study of matter under the most diverse conditions. In this context, white dwarfs prove to be an excellent research laboratory, as they reach have temperatures, ... -
Investigando o equilíbrio térmico local nos estágios iniciais das colisões de íons pesados no regime de acoplamento fraco e o alargamento nuclear de momento transversal
(2022) [Tese]Este trabalho estuda a termalização da matéria formada nos instantes iniciais de uma colisão ultra-relativística de íons pesados e o ganho de momento transversal de um párton que se desloca pelo meio nuclear. Diferentes ... -
Thermodynamic anomalies in ultracold quantum gases
(2021) [Tese]Although well-researched as a prototype Hamiltonian for strongly interacting quantum systems, the Bose-Hubbard model has not so far been explored as a fluid system with waterlike anomalies. Water, the substance of life, ... -
Effects of the 12C(α, γ) 16O reaction rates on single stellar evolution computations
(2022) [Tese]One of the largest uncertainties in stellar evolutionary computations is the accuracy of the considered reaction rates. The 12C(α, γ) 16O reaction is important in stars of all masses, but is of particular importance for ... -
A proper velocity measure for mesenchymal cells migration
(2022) [Dissertação]Single cell migration experiments [Selmeczi et al., 2005, Dieterich et al., 2008] shows a shorttime, diffusive behavior that precludes definition of instant velocity and puts in check some current cell migration theory ... -
Utilização de nanopartículas bimetálicas PdCu na produção de energia limpa e renovável
(2022) [Tese]Nanopartículas bimetálicas Pd-Cu suportadas em carbono, contendo diferentes proporções de paládio e cobre foram desenvolvidas e testadas como eletrocatalisadores. Estes materiais foram utilizados na reação de evolução de ...