Considerations on the provenance determination of plant ash glasses using strontium isotopes

Strontium isotopic analysis has been proposed as a suitable method to determine the primary production location of ancient plant ash glasses. The technique is based upon the assumption that Sr enters this glass type with the plant ash used as a flux material, and that the ⁸⁷Sr/⁸⁶Sr ratio of the resulting glass reflects the geological provenance of that flux. In such case, the bulk Sr isotopic composition of the bedrock should be inherited unchanged in the plants growing on that bedrock. Different types of plant ash glasses have been shown to have widely differing ⁸⁷Sr/⁸⁶Sr compositions. In this study, the ⁸⁷Sr/⁸⁶Sr composition of several plant species growing on different bedrock types is measured, and compared to the bulk Sr isotopic composition and petrology of that bedrock. The paper shows that the ⁸⁷Sr/⁸⁶Sr ratio of these plants is a function not only, or even mostly, of the local geology, but also of the Sr isotopic composition of the total water consumed by that plant. This is highly likely to be both plant species dependent and dependent on the small-scale hydrology of the area immediately surrounding the plant. In this way, no definite relation between the isotopic composition of a geological outcrop and the plants growing on this bedrock can be inferred. Hence, the isotopic composition of a plant ash made from such plants is uncertain and moreover species dependent. Though groups of plant ash glasses can certainly be compared in time and space using Sr isotopes, it may prove difficult to ascertain a plant ash glass type to a specific geographical-geological region.     

Scale,Factor Analyses,and Neighborhood Effects

Studies of potential neighborhood effects have been constrained in most situations by the absence of small‐area data generated to characterize the local contexts within which individuals operate. Using small‐area data from the U.K. Census, this paper Illustrates the creation of bespoke neighborhoods—local areas defined separately for each individual in a sample survey—at a variety of scales, and their characterization using factor analysis techniques. Theories of neighborhood effects are uncertain as to the spatial scale at which the relevant processes operate, hence the value of exploring patterns consistent with those processes at a range of spatial scales. One problem with such comparative study is the incommensurability of regression coefficients derived from analyses using factor scores as the independent variables. The work reported here adapts a procedure introduced for reconstituting partial regression coefficients to circumvent that problem, and illustrates that patterns of voting at a recent British general election showed neighborhood‐effect‐like patterns at two separate scales simultaneously—with individual voter characteristics held constant.     

The Turnover Club: locality and identity in the North Staffordshire practice of turning over ceramic ware

This paper explores a key practice adopted by those local to or from Stoke-on-Trent, and outlines its significance in the wider context of ‘ordinary’ consumption and material cultures, globalisation and local identity. Being a ‘turnover-er’ – someone who always turns over pottery to check whether it is Stoke-on-Trent ware – is an oft practised, but little examined part of the living heritage that connects those with affinity to ‘the Potteries’ (as the region is known) and its ceramic ware. The project set out to explore qualitative accounts of turning over and to gauge its salience and reach as a practice, linking this to broader accounts of material culture, consumption and heritage. We carried out 20 interviews with those who turn over or who have an interest in local ceramics, and an online survey (n = 500) which explored the some of the reasons for turning over. Findings indicate the strong connections established by the practice of turning over to local identity, both inherited and adopted, and further indicates the social salience and emotional attachments to the meanings of local ware.     

Integration of Complementary Archaeological Prospection Data from a Late Iron Age Settlement at Vesterager—Denmark

The complementary use of various archaeological prospection data sets offers a series of new possibilities for the investigation of prehistoric settlements. In addition to the separate interpretations of the single methods, the implementation of image fusion provides an additional tool to obtain an even higher degree of data integration during the interpretation process. To investigate some possibilities and risks of image fusion, a procedure frequently used in the medical field but rarely applied in archaeology, various algorithms inside a dedicated MATLAB toolbox TAIFU (Toolbox for Archaeological Image FUsion) were tested on the geophysical prospection data from an Iron Age settlement near Vesterager in West Jutland, Denmark. The Ludwig Boltzmann Institute for Archaeological Prospection and Virtual Archaeology had conducted large-scale, high-resolution ground-penetrating radar (GPR) and magnetometry surveys at the site in 2014, based on its discovery by the Ringkøbing Museum through aerial photos and the results of a follow-up excavation in 2009. The aim was to determine if, and to what extent, geophysical prospection together with a novel integrative interpretational approach was able to add more detailed information to an already known prehistoric settlement. Results yielded a variety of deeper insights into the separate farms (dated to around AD 400), including the discovery of several new structures and more information about the construction of the longhouses, as well as a first suggestion on how to implement image fusion into the process of analysis and archaeological interpretation of geophysical data sets.     

Expert Policy in Juvenile Justice

Policy design and analysis is conducted primarily by professional experts who often use objectively-defined criteria in the selection of those eligible for a policy and objective measurements to evaluate the effectiveness of a program. Juvenile justice policies, such as Juvenile Intensive Probation Supervision (JIPS), often are developed by experts who aim at correcting individual problems of youths rather than identifying problems with the structures of our society. Policies such as JIPS do not encourage participation of the recipients or of the wider community. In essence, the experts are removing power from already powerless youths and citizens, and thus are placing it in the hands of a few who are viewed as knowing what is best for everyone. As such, policies developed by experts often do not encourage democracy and citizenship. This articles suggests how youths, their families, parents, and communities can and need to become empowered in order for justice and democracy to prevail.     

Bridging the gap: a terrestrial view of shallow marine sequences and the importance of the transition zone

The shallow shelf area around the coast of the UK contains an important record of maritime and, potentially prehistoric archaeology. Increasingly this area is the focus of anthropogenic activity such as gravel extraction and cable laying in advance of which it is increasingly common practice to investigate the archaeological potential of the sequences/regions. Well structured approaches have been developed for the investigation of maritime wrecks and the latest Prehistoric remains, however the Palaeolithic archaeological potential of these regions is less clear. This is partly due to the depth of burial of archaeological material and the rather more fragmentary nature of the sequences present. Where consideration of the Palaeolithic archaeology has been undertaken, models and presumptions derived from terrestrial situations have been extrapolated across the near shore zone, where often there is no data, and into the maritime area. Within the maritime area these models have been used to interpret seismic data and scarce offshore core data for making regional reconstructions. Here we consider some of the issues in reconstruction and highlight the difficultly in extrapolating between terrestrial and maritime situations without careful investigation in the transition zone. In particular we argue that rather than assuming similarities between patterns of landscape evolution between the on- and off-systems we should anticipate dissimilarity of patterns, missing sequences and different landscape formation processes particularly in those areas of the shallow shelf area formerly occupied by drainage basins during sea level low-stands.