11,830 research outputs found
The non-relativistic limit of the Nordstr\"om-Vlasov system
The Nordstr\"om-Vlasov system provides an interesting relativistic
generalization of the Vlasov-Poisson system in the gravitational case, even
though there is no direct physical application. The study of this model will
probably lead to a better mathematical understanding of the class of non-linear
systems consisting of hyperbolic and transport equations. In this paper it is
shown that solutions of the Nordstr\"om-Vlasov system converge to solutions of
the Vlasov-Poisson system in a pointwise sense as the speed of light tends to
infinity, providing a further and rigorous justification of this model as a
\textit{genuine} relativistic generalization of the Vlasov-Poisson system.Comment: 19 page
A note on the Plebanski action with cosmological constant and an Immirzi parameter
We study the field equations of the Plebanski action for general relativity
when both the cosmological constant and an Immirzi parameter are present. We
show that the Lagrange multiplier, which usually gets identified with the Weyl
curvature, now acquires a trace part. Some consequences of this for a class of
modified gravity theories recently proposed in the literature are briefly
discussed.Comment: 14 pages. v2: factor 2 corrected, updated reference
Inflamação das vias aéres em asmáticos virgens de tratamento com esteróides: características do escarro induzido em nosso meio.
Trabalho de Conclusão de Curso - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Departamento de Clínica Médica, Curso de Medicina, Florianópolis, 200
Recommended from our members
The influence of social power on weight perception.
Lee, E. H., & Schnall, S. (in press). The influence of social power on weight perception. Journal of Experimental Psychology: General
Charmonium mass splittings at the physical point
We present results from an ongoing study of mass splittings of the lowest
lying states in the charmonium system. We use clover valence charm quarks in
the Fermilab interpretation, an improved staggered (asqtad) action for sea
quarks, and the one-loop, tadpole-improved gauge action for gluons. This study
includes five lattice spacings, 0.15, 0.12, 0.09, 0.06, and 0.045 fm, with two
sets of degenerate up- and down-quark masses for most spacings. We use an
enlarged set of interpolation operators and a variational analysis that permits
study of various low-lying excited states. The masses of the sea quarks and
charm valence quark are adjusted to their physical values. This large set of
gauge configurations allows us to extrapolate results to the continuum physical
point and test the methodology.Comment: 7 pp, 6 figs, Lattice 201
- …