Gravastars must have anisotropic pressures

Computing magnetospheric equilibria with anisotropic pressures

[1] We present initial results from an equilibrium code that has been modified to include the effect of anisotropic pressures. This equilibrium code uses a frictional technique to iterate a set of modified MHD equations to equilibrium. We describe the modifications made to the original isotropic equilibrium code, including changes to the initial conditions that include a procedure to enforce th...

Prescribing tests must have curriculum support

Correspondence: Thomas I Lemon School of Medicine, Cardiff University, University Hospital of Wales, Heath Park, Cardiff CF14 4XW, Wales Email [email protected] Dear Editor Gordon, Catchpole and Baker have discussed and investigated a very interesting, currently relevant, subject in medical education; particularly with the introduction of the prescribing test for undergraduates trialled in the U...

Dairy Cattle Must Have Good Forage

Stable gravastars — an alternative to black holes?

The “gravastar” picture developed by Mazur and Mottola is one of a very small number of serious challenges to our usual conception of a “black hole”. In the gravastar picture there is effectively a phase transition at/ near where the event horizon would have been expected to form, and the interior of what would have been the black hole is replaced by a segment of de Sitter space. While Mazur an...

Must-Have Knowledge about the Helicobacter pylori-Negative Gastric Cancer

Are gastric cancers all attributable to Helicobacter pylori infection? This question is very fundamental for gastric cancer prevention strategies. Cancers are a result of genetic instability and the carcinogenic causes are comprised of both host and environmental factors. Infection is a major initiative for cancer development and, in 2008 statistics, the population attributable fraction (PAF) f...