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A detailed crystal chemical study of coexisting olivine, orthopyroxene, clinopyroxene and spinel from selected Victorian (Australia) lherzolite suites was carried out by means of single crystal x-ray diffraction and electron probe microanalysis to obtain actual site occupancies. The aim of this study was primarily to characterise the intracrystalline configurations and related cation ordering on sites in major mantle constituents. The results demonstrate that cation ordering on sites is subject to distinctive crystallographic controls which depend on the petrological evolution of the suite. Mg-Fe2+ ordering in M1–M2 pyroxene sites depends on variations of the smaller cations, mainly Alvi, Ti4+, Fe3+, and related configurations of M 1. Pressuresensitive Alvi is crucial to Fe2+, the more ordered clinopyroxene showing high Alvi configurations which tend to exclude the larger bivalent cations and yield small polyhedral volumes for M 1, M 2, T sites and the unit cell. Conversely, the coexisting orthopyroxene, characterised by lower Alvi configuration and higher M 1 and unit cell volumes, is relatively more disordered. Olivine is consistent with the coexisting clinopyroxene, the more disordered crystals coexisting with more disordered clinopyroxene, while Al-Mg order in the coexisting spinel shows the reverse relationship. Estimated temperatures of apparent equilibration based on current geothermometers are not considered realistic. Assumptions of ideal cation mixing on sites in pyroxene and spinel are not supported.

This article reviews the literature on women entrepreneurs in developing countries and presents evidence from a case study undertaken during 2001 and 2002 in Gambia examining the challenges facing women entrepreneurs in the small enterprise sector. The article attempt to discuss the gendered nature of the barriers to survival and growth, particularly the low productivity of sectors in which women entrepreneurs operate, the difficulty in accessing capital for expansion and the need to reconcile business with domestic activities and the propensity to view business as part of an overall livelihood diversification strategy. The article argues that further to addressing specific gender needs of women entrepreneurs, policy and support mechanisms must be sensitive to and geared towards both enterprises with potential and aspirations for growth and diversification and those whose primary objective is that of sustaining livelihoods. Copyright © 2006 John Wiley & Sons, Ltd.

This paper addresses the role of social connections in helping women migrants to settle in the UK. We focus on micro- and macro-social capital with the former including local social networks and organisation (comprising immediate family, other immigrants, neighbours, churches) and the latter including experience with local government supporting institutions. In this context, we present results from a pilot study based on data collected amongst women immigrant workers in the care sector in the UK. A majority of respondents in our sample come from Africa and Asia and 62 per cent arrived without family. Our results indicate that while education decreases the extent to which women in our sample feel settled, contact with the local community as well as living within an immigrant community helped the women to feel settled. Finally, their experience with services like housing and immigration proved very significant. Copyright © 2006 John Wiley & Sons, Ltd.

A computer program for three-dimensional location of cavities in crystal structures and packing-density checks is presented.

Author(s): Argento, Elena; Goldenberg, Shira; Braschel, Melissa; Machat, Sylvia; Strathdee, Steffanie A; Shannon, Kate | Abstract: BackgroundFollowing a global wave of end-demand criminalization of sex work, the Protection of Communities and Exploited Persons Act (PCEPA) was implemented in Canada, which has implications for the health and safety of sex workers. This study aimed to evaluate the impact of the PCEPA on sex workers' access to health, violence, and sex worker-led services.MethodsLongitudinal data were drawn from a community-based cohort of ~900 cis and trans women sex workers in Vancouver, Canada. Multivariable logistic regression examined the independent effect of the post-PCEPA period (2015-2017) versus the pre-PCEPA period (2010-2013) on time-updated measures of sex workers' access to health, violence supports, and sex worker/community-led services.ResultsThe PCEPA was independently correlated with reduced odds of having access to health services when needed (AOR 0.59; 95%CI: 0.45-0.78) and community-led services (AOR 0.77; 95%CI: 0.62-0.95). Among sex workers who experienced physical violence/sexual violence or trauma, there was no significant difference in access to counseling supports post-PCEPA (AOR 1.24; 95%CI: 0.93-1.64).ConclusionSex workers experienced significantly reduced access to critical health and sex worker/community-led services following implementation of the new laws. Findings suggest end-demand laws may exacerbate and reproduce harms of previous criminalized approaches to sex work in Canada. This study is one of the first globally to evaluate the impact of end-demand approaches to sex work. There is a critical evidence-based need to move away from criminalization of sex work worldwide to ensure full labor and human rights for sex workers. Findings warn against adopting end-demand approaches in other cities or jurisdictions.