Gravitational lensing observations of massive X-ray clusters imply a steep characteristic density profile marked by a central concentration of dark matter. The observed mass fraction within a projected radius of 150 kpc is twice that found in state-of-the-art dark matter simulations of the standard cold dark matter cosmology. A central baryon enhancement that could explain this discrepancy is n...

Magnetic resonance imaging was used to evaluate the influence of sex and brain size on compartmental brain volumes (grey matter, white matter, CSF) in a large and well-matched sample of neurologically normal women (n = 50) and men (n = 50). As expected, we found a significant sex difference for the absolute volumes of total brain, grey matter, white matter and CSF, with greater volumes for men....

This paper reviews the literature on the determinants of entrepreneurial activity and investigates to what extent differences in the population, business environment and cultural values contribute to explaining differences in entrepreneurial activity across Swedish municipalities. Individual characteristics and business environment are the most important factors in explaining entrepreneurial ch...

Neutron stars in mass-transferring binaries are accreting the hydrogen and helium rich matter from the surfaces of their companions. This article explains the physics associated with how that material eventually fuses to form heavier nuclei and the observations of the time dependent phenomena (such as Type I X-ray bursts) associated with the thermally unstable thermonuclear reactions. The major...

with respect to the process of creation of novelty among economists; that’s why schumpeter has used the term “impossible” in regard to this unknowable process. this is a right term, since this subject matter can’t be incorporated within the theoretical framework determined by orthodox conceptual rationality. considering the importance and necessity of the creation of novelty for the process of ...

Siphons have been used since ancient times, but exactly how they work is still a matter of debate. In order to elucidate the modus operandi of a siphon, a 1.5 m high siphon was set up in a hypobaric chamber to explore siphon behaviour in a low-pressure environment. When the pressure in the chamber was reduced to about 0.18 atmospheres, a curious waterfall-like feature appeared downstream from t...