Impact of Modification on Ground Motion Characteristics and Geotechnical Seismic Analyses for a California Site

The impact of different modification techniques on ground motion characteristics and results of seismic geotechnical analyses is investigated for a site in California. Twenty-eight motions were selected and scaled and also modified using both time domain (TD) and frequency domain (FD) techniques. PGV and PGD of the TD-modified motions are found to be larger than their FD-modified counterparts, but slightly less than the scaled ground motion characteristics. Cyclic stress ratios and amplification factors are similar for all sets of motions. Newmark-type slope displacements caused by the scaled and modified ground motions are similar (within 25%) for a variety of sliding masses.     

Social Protection and Class Relations: Evidence from Scheduled Caste Women's Associations in Rural South India

This article argues that the labouring class poor are best able to access social protection when they have sufficient economic autonomy from their village's dominant class to allow them to act politically. To this end, the article analyses the capacity of associations of scheduled caste female labourers in rural Karnataka (south India) to access social protection through collective action. It identifies links between modifications of the material conditions of the labouring class, their capacity to take political action and the social and institutional forms that reflect the social relations of production. Three important variables are identified: the extent of economic autonomy from the dominant class, support from class‐conscious social movement organizers and the political configuration of the local state. The former variable in particular is something that the mainstream social protection policy agenda fails to prioritize.     

Faeces deposition on Amazonian Anthrosols as assessed from 5β-stanols

In the Amazon Basin, within a landscape of infertile soils, fertile Anthrosols of pre-Columbian origin occur (Amazonian Dark Earths or terra preta de Índio). These soils are characterized by high amounts of charred organic matter (black carbon, biochar) and high nutrient stocks. Frequently, they were considered as sign for intensive landscape domestication by way of sedentary agriculture and as sign for large settlements in pre-Columbian Amazonia. Beyond the archaeological interest in Amazonian Dark Earths, they increasingly receive attention because it is assumed that they could serve as a model for sustainable agriculture in the humid tropics (terra preta nova). Both questions lack information about the pre-Columbian practices which were responsible for the genesis of Amazonian Dark Earths. It has often been hypothesized that deposition of faeces could have contributed to the high nutrient stocks in these soils, but no study has focussed on this question yet. We analyzed the biomarkers for faeces 5β-stanols as well as their precursors and their 5α-isomers in Amazonian Dark Earths and reference soils to investigate the input of faeces into Amazonian Dark Earths. Using Amazonian Dark Earths as example, we discuss the application of threshold values for specific stanols to evaluate faeces deposition in archaeological soils and demonstrate an alternative approach which is based on a comparison of the concentration patterns of 5β-stanols with the concentration patterns of their precursors and their 5α-isomers as well as with local backgrounds. The concentration patterns of sterols show that faeces were deposited on Amazonian Dark Earths.     

Political opportunity structures,evangelical Christians and morality politics in Canada,Australia and New Zealand

Politically active evangelical Christian populations are found in Canada, Australia and New Zealand. Yet their patterns of activism differ not only from the exceptional United States experience, but also one another. This paper applies a political opportunity approach to explain these variations, demonstrating how differences in denominational identities and linkages and political institutions shape evangelical activism, and illustrating these opportunity structures through an examination of the struggles over same-sex marriage in each country. This approach offers a variety of further avenues for the comparative study of ‘morality politics’ in different countries, moving beyond bilateral comparisons with the United States.     

From Iberia to the Southern Levant: The Movement of Silver Across the Mediterranean in the Early Iron Age

Journal of World Prehistory - The origins of the silver trade across the Mediterranean, and the role of the Phoenicians in this phenomenon, remain contentious. This is partly because of...