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Transparent obsidian artifacts have been reported for the northern Lake Titicaca Basin. Based on instrumental neutron activation analysis (INAA) of these artifacts a distinct chemical group was identified. Yet, the location of the source of transparent obsidian in the southern Andes remained unreported in the archaeological literature. This paper reports on the chemical composition and geographic location of a source of transparent obsidian from the Macusani region of Peru. Through the use of INAA and portable X-ray fluorescence (PXRF) we demonstrate that Macusani obsidian or macusanite comprises (at least) two chemical groups. One of these groups was used for making artifacts during the Archaic Period. Artifacts made of this obsidian were found more than 120 km from the source and yet, one-third of the obsidian artifacts encountered at Macusani were from the non-local source of Chivay which is 215 km to the southwest.  相似文献   
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ABSTRACT

This article is concerned with the everyday ‘spatial tactics’ deployed by children in a street situation in order to deal with notions of public space that define them as ‘out of place’, marginal and deviant. Using photovoice, we reconstruct former street children’s definitions of and feelings about their spaces in the city, bringing into view a complex set of social problems, attitudes and strategies that moves beyond the traditional binary notion of street children as either deviants or victims. This work points to the importance of finding ways to ensure the voices of marginalized and disadvantaged children are heard and presents the narratives that are important to our understanding of their worlds. Analyzing their spatiality in contexts of conflict, belonging and resistance, we found that children and youth in a street situation are mainly concerned with empowering themselves and resisting dominant labels and police repression.  相似文献   
976.
Simmel     
  相似文献   
977.
ABSTRACT

United Nations police (UNPOL) have become increasingly important to operational effectiveness of peace operations. For some time, their contribution to re-establishing the rule of law in conflict-affected states has been seen as a cornerstone for building sustainable peace and enabling mission exit strategies. In a departure from traditional peacekeeping and post-conflict assistance, recent years have seen UN peace operations directed to stabilise countries and protect civilians in the context of on-going violent conflict. As a result, UNPOL have had to undertake a range of expanded tasks, exacerbating long-standing challenges and producing new impediments to their operational effectiveness. At the same time, a ‘pragmatic turn’ is generating increased interest in more police-centric concepts of peacekeeping as a possible alternative to today’s expensive and military-focused peace operations. Drawing on extensive fieldwork in multiple peace operations and at UN headquarters, this article examines the changing roles of UNPOL in a new breed of UN peace operations, identifies the major associated challenges and proposes a series of recommendations for overcoming them. It argues that if police are to respond to unfolding challenges while becoming more central to peacekeeping outcomes, then significant reforms and further research into their impacts will be required.  相似文献   
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