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Analytical expression for K- and L-shell cross sections of neutral atoms near ionization threshold by electron impact
(2007)
An analytical expression is proposed to describe the K- and L-shell ionization cross sections of neutral atoms by electron impact over a wide range of atomic numbers (4 ≤ Z ≤ 79) and over voltages U < 10. This study is ...
Obtenção de autovalores de soluções em série de problemas de condução de calor com condições de contorno convectivas
(Universidade Estadual de CampinasGuarapuavaBrasilDepartamento de EnergiaPrograma de Pós-Graduação em Engenharia MecânicaUNICAMP, 2015-08-25)
Apart from simple problems of heat conduction in which the temperature depends only on the time or just on a position coordinate, the others lead to partial differential equations, which have solutions in terms of series ...
Simple analytical expression for vector hypernuclear asymmetry in nonmesonic decay ofΛ 5He andΛ 12C
(2006-12-01)
We present general explicit expressions for a shell-model calculation of the vector hypernuclear parameter in nonmesonic weak decay. We use a widely accepted effective coupling Hamiltonian involving the exchange of the ...
Simple analytical expression for vector hypernuclear asymmetry in nonmesonic decay ofΛ 5He andΛ 12C
(2006-12-01)
We present general explicit expressions for a shell-model calculation of the vector hypernuclear parameter in nonmesonic weak decay. We use a widely accepted effective coupling Hamiltonian involving the exchange of the ...
Approximate analytical methodology for calculating friction factors in flow through polygonal cross section ducts
(Springer Berlin HeidelbergBrasilNúcleo Interdisciplinar de Dinâmica dos Fluidos, 2019)
Phase behavior of attractive k-mers on two-dimensional lattices: a study from quasi-chemical approximation
(Springer, 2013-01)
The phase behavior of attractive linear rigid k-mers on two-dimensional lattices was studied by theoretical and simulation calculations in the framework of the lattice-gas model. Combining (i) the analytical expression for ...
Analytical models for channel aging and synchronization errors for base station cooperation
(IEEE, 2013)
Base station cooperation is a powerful technique for eliminating inter-cell interference and enhancing spectral efficiency in cellular networks. However, impairment effects due to channel time variance, channel estimation, ...
Analytical solutions for radiation-driven winds in massive stars - II: The δ-slow regime
(Oxford University Press, 2021-06)
Accurate mass-loss rates and terminal velocities from massive stars winds are essential to obtain synthetic spectra from radiative transfer calculations and to determine the evolutionary path of massive stars. From a ...