Spin and spatial dynamics in electron-impact scattering off S-wave He using R-matrix with Time-Dependence theory

R-matrix with time-dependence theory is applied to electron-impact ionisation processes for He in the S-wave model. Cross sections for electron-impact excitation, ionisation and ionisation with excitation for impact energies between 25 and 225 eV are in excellent agreement with benchmark cross sections. Ultra-fast dynamics induced by a scattering event is observed through time-dependent signatures associated with autoionisation from doubly excited states. Further insight into dynamics can be obtained through examination of the spin components of the time-dependent wavefunction.

The Dynamics of Male and Female Street Prostitution in Manchester, England

This article examines male street prostitution in Manchester, England, and draws some comparisons to its female counterpart in this city. While the two sectors have some important similarities, we also find significant differences in the physical and social ecology of the places in which they work, in their behavior patterns, and in individuals’ demographics and work experiences. We find that ecological dif- ferences between the male and female markets have a major impact on partici- pants’ work practices, opportunities, and integration into the local community. The data also indicate that it is incorrect to speak of a monolithic male street market or sector in Manchester because sellers shift between settings (street, bar, and escorting), unlike the female street sector. We also find that the males demonstrate more diversity in their repertoires for earning money. The findings have implications for local government policy and for outreach workers who work with these populations.