A geometric morphometric relationship predicts stone flake shape and size variability

The archaeological record represents a window onto the complex relationship between stone artefact variance and hominin behaviour. Differences in the shapes and sizes of stone flakes—the most abundant remains of past behaviours for much of human evolutionary history—may be underpinned by variation in a range of different environmental and behavioural factors. Controlled flake production experiments have drawn inferences between flake platform preparation behaviours, which have thus far been approximated by linear measurements, and different aspects of overall stone flake variability (Dibble and Rezek J Archaeol Sci 36:1945–1954, 2009; Lin et al. Am Antiq 724–745, 2013; Magnani et al. J Archaeol Sci 46:37–49, 2014; Rezek et al. J Archaeol Sci 38:1346–1359, 2011). However, when the results are applied to archaeological assemblages, there remains a substantial amount of unexplained variability. It is unclear whether this disparity between explanatory models and archaeological data is a result of measurement error on certain key variables, whether traditional analyses are somehow a general limiting factor, or whether there are additional flake shape and size drivers that remain unaccounted for. To try and circumvent these issues, here, we describe a shape analysis approach to assessing stone flake variability including a newly developed three-dimensional geometric morphometric method (‘3DGM’). We use 3DGM to demonstrate that a relationship between platform and flake body governs flake shape and size variability. Contingently, we show that by using this 3DGM approach, we can use flake platform attributes to both (1) make fairly accurate stone flake size predictions and (2) make relatively detailed predictions of stone flake shape. Whether conscious or instinctive, an understanding of this geometric relationship would have been critical to past knappers effectively controlling the production of desired stone flakes. However, despite being able to holistically and accurately incorporate three-dimensional flake variance into our analyses, the behavioural drivers of this variance remain elusive.     

In the front line: women,work and new spaces of labour politics in Poland

Pessimistic accounts of women's lives in post-communist Poland view women as powerless and passive victims of the transformation process. In contrast, this article argues that while political change and the restructuring of the economy have closed down some spaces of articulation and organisation, others have opened up. The article focuses on the way in which women in their spheres of work are shaping and actively resisting change through new organisations and individual and collective actions, which are in some ways a break with the past, but in other ways build on previous forms of activity. The work draws on qualitative research conducted over the last decade across Poland. This has coupled extensive interviews with women workers, national and regional trade union leaders, activists and feminists in a number of major Polish cities with reviews of Polish media and policy. We examine the economic and ideological context in which these new articulations are taking place, against the background of Poland's post-war communism and the rise of opposition movements. We look at the neoliberal restructuring of the economy and the implications for women within the labour market and in their domestic lives. In particular, we examine initiatives from below in workplace organisation, by focusing on new unions and new actions in the public sector, and the beginnings of organisation in the new areas of the economy such as supermarkets. Finally, we look at how women are articulating their interests beyond formal workplaces. We conclude that we should be optimistic about these new spaces of activism. While some are well established, others are embryonic but provide a strong foundation on which women can increase their participation in spaces that promote their varied interests.     

Reappraisal of ‘chronospecies’ and the use of Arvicola (Rodentia,Mammalia) for biochronology

The water vole, genus Arvicola, is characterised by a broad geographic distribution throughout Europe and is widespread during the late Middle and Upper Pleistocene. This genus is used as a major biostratigraphic tool within the Quaternary. Specific determinations using the Schmelzband-Differenzierung-Quotient or SDQ have identified many chronospecies within the fossil species Arvicola cantiana (Hinton, 1910). As SDQ calculation remains limited, this study reappraises the Arvicola genus in terms of morphodiversity and morphospace using outline analysis which takes into account the tooth as a whole. Outline analysis suggests that one single species of Arvicola, A. cantiana, was present during the Pleistocene. This species shows great variability with no trends or patterns in morphospace. Thus, these results call into question the reliability of SDQ for specific determinations and throw doubt on the biochronological framework based on Arvicola.