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Mostrando ítems 31-40 de 1523
Improving the GNSS positioning stochastic model in the presence of ionospheric scintillation
(Springer, 2009-10-01)
Ionospheric scintillations are caused by time-varying electron density irregularities in the ionosphere, occurring more often at equatorial and high latitudes. This paper focuses exclusively on experiments undertaken in ...
Improving the GNSS positioning stochastic model in the presence of ionospheric scintillation
(Springer, 2009-10-01)
Ionospheric scintillations are caused by time-varying electron density irregularities in the ionosphere, occurring more often at equatorial and high latitudes. This paper focuses exclusively on experiments undertaken in ...
An inhomogeneous nonlocal diffusion problem with unbounded steps
(SPRINGER BASEL AG., 2016)
We consider the following nonlocal equation
integral J (x-y/g(y)) u(y)/g(y) dy - u(x) = 0 x is an element of R,
where J is an even, compactly supported, Holder continuous kernel with unit integral and g is a ...
Birth of limit cycles from a 3D triangular center of a piecewise smooth vector field
(2017-01-01)
We consider a piecewise smooth vector field in R3, where the switching set is on an algebraic variety expressed as the zero of a Morse function.We depart from a model described by piecewise constant vector fields with a ...
A Neumann problem with logarithmic nonlinearity in a ball
(Pergamon-elsevier Science LtdOxfordInglaterra, 2009)
Existence of periodic orbits in nonlinear oscillators of Emden–Fowler form
(Elsevier Science BV, 2016)
Reflexões acerca da Lei de Improbidade Administrativa: o prazo prescricional aplicável aos empregados públicos da Petrobras que exercem cargos comissionados na Companhia
(2019)
O presente artigo visa analisar qual seria o prazo prescricional aplicável às Ações Civis Públicas de Improbidade Administrativa contra agentes públicos que, ao mesmo tempo, são empregados públicos da Petrobrás e exercem ...
Persistence and extinction in a mathematical model of cell populations affected by radiation
(2008)
A mathematical model consisting of a system of two ordinary differential equations is formulated to represent the interrelationship between healthy and radiated cells at a given cite. Three different modes of radiation are ...