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Inverse cascades and resonant triads in rotating and stratified turbulence
(American Institute of Physics, 2017-11)
Kraichnan’s seminal ideas on inverse cascades yielded new tools to study common phenomena in geophysical turbulent flows. In the atmosphere and the oceans, rotation and stratification result in a flow that can be approximated ...
A singular vorticity wave packet within a rapidly rotating vortex: spiralling versus oscillating motions
(2019)
This paper considers a free vorticity wave packet propagating within a rapidly rotating vortex in the quasi-steady regime, a long time after the wave packet strongly and unsteadily interacted with the vortex. We study a ...
Discovery of millihertz quasi-periodic oscillations in the X-ray binary EXO 0748−676
(Oxford University Press, 2019-06)
We report the discovery of millihertz quasi-periodic oscillations (mHz QPOs) from the bursting, high-inclination atoll neutron star low-mass X-ray binary (NS LMXB) EXO 0748−676 with the Rossi X-ray Time Explorer (RXTE). ...
Sistemas Nanoestruturados: Heteroestruturas Quasi-Periódicas de Nitretos e Cálculos Ab initio em Polimorfos CaCO3Sistemas Nanoestruturados: Heteroestruturas Quasi-Periódicas de Nitretos e Cálculos Ab initio em Polimorfos CaCO3
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em FísicaFísica da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera, 2007-06-11)
The physical properties and the excitations spectrum in oxides and semiconductors materials are presented in this work, whose the first part presents a study on the confinement of optical phonons in artificial systems based ...
Do Magnetic Fields Destroy Black Hole Accretion Disk g-Modes?
(2015-08-04)
Diskoseismology, the theoretical study of normal-mode oscillations in geometrically thin, optically thick accretion disks, is a strong candidate for explaining some quasi-periodic oscillations in the power spectra of many ...
Uso das ondas de Lamb e Scholte para caracterização de líquidos
(Universidade Estadual Paulista (Unesp), 2015-05-29)
The study of the interaction of elastic waves in solids immersed in a fluid has been recognized as a suitable method for fluid characterization. Guided waves in plate-like structures, are mul- timodal and dispersive. These ...
Conformal Klein-Gordon equations and quasinormal modes
(Springer/plenum PublishersNew YorkEUA, 2007)
A direct comparison of the performance of public-private partnerships with that of traditional contractingUna comparación directa del desempeño de una CPP con el modelo tradicional de contratación públicaUma comparação direta do desempenho de uma PPP com o modelo tradicional de contratação pública
(Escola Brasileira de Administração Pública e de Empresas da Fundação Getulio Vargas, 2018)