Resolution of an ancient surface science anomaly: Work function change induced by N adsorption on W{100}

For many decades it has been assumed that an adsorbate centered above a metal surface and with a net negative charge should increase the work function of the surface. However, despite their electronegativity, N adatoms on W{100} cause a significant work function decrease. Here we present a resolution of this anomaly. Using density functional theory, we demonstrate that while the N atom carries a negative charge, of overriding importance is a reduction in the surface overspill electron density into the vacuum, when that charge is engaged in bonding to the adatom. This novel interpretation is fundamentally important in the general understanding of work function changes induced by atomic adsorbates.

Mapping the Governance Reform of Welfare to Work in Britain under New Labour

This article draws on Newman's (2001, 2007) typology of the modernization of governance under New Labor, to examine the development of British welfare to work administration. Concentrating on the delivery of active labor market policy, the article suggests network forms of governance occupy a marginal role in welfare to work delivery. Managerialist and hierarchical forms of governance dominate administration of activation policy. In accordance with UK tradition, a national centralized, top down system exercises control of social security and employment services administration, but increasingly seeks to realize its goals through a market system of delivery.

Child Welfare Interventions: Patterns of Social Work Practice

Some 10 years ago one of the authors embarked on a research study examining the potential for social workers to shift from a child protection to a child welfare practice orientation (Spratt, 2000; 2001; Spratt and Callan, 2004). The research reported here develops that work; examining how social workers respond to ‘child care problems’ (CCPs). The results indicate that Northern Irish Health and Social Services Trusts (equivalent to Local Authorities in England and Wales) have responded to social policy goals to balance the protection of a lesser number of children whilst meeting the welfare needs of the greater by reducing the number of referrals designated ‘child protection investigations’ (CPIs) and increasing the number of CCPs. Closer analysis reveals, however, that a filtering system has been developed by social workers to address perceived child protection risks within CCP cases. Paradoxically, this leads to early closure of the more concerning cases, with service provision largely confined to the least concerning. The authors argue that the ways in which social workers balance social policing and supportive functions in practice may indicate possible responses to an increase in referred families anticipated within Every Child Matters (Chief Secretary to the Treasury, 2003).