Random walk of magnetic field lines for different values of the energy range spectral index

An analytical nonlinear description of field-line wandering in partially statistically magnetic systems was proposed recently. In this article the influence of the wave spectrum in the energy range onto field-line random walk is investigated by applying this formulation. It is demonstrated that in all considered cases we clearly obtain a superdiffusive behavior of the field-lines. If the energy range spectral index exceeds unity a free-streaming behavior of the field-lines can be found for all relevant length-scales of turbulence. Since the superdiffusive results obtained for the slab model are exact, it seems that superdiffusion is the normal behavior of field-line wandering.

The role of theory in promoting social work values and its potential effect on outcomes in work with domestically violent men

This article is concerned with the ethical conflicts that arise for social workers when dealing with males that perpetrate violence against women and children with whom they have or had intimate relationships. In particular, the article seeks to highlight how a strong social work value base is essential when working with perpetrators whose apparent wilful violent controlling behaviour creates a major ethical dilemma for the practising social worker. The argument contends that strategies designed to protect and enhance the welfare of domestic violence victims, particularly those aimed at the re-education of perpetrators, are weakened when social workers do not adhere to a social work value base.