Characterisation of archaeological mortars from Pompeii (Campania,Italy) and identification of construction phases by compositional data analysis

This work describes the compositional characterisation of coccciopesto and natural pozzolanic mortars sampled in the Regio VI area of the archaeological site of Pompeii, with particular reference to the Casa di Pansa in Insula 6 and Casa 17 in Insula 2. Samples were studied by optical microscopy and analysed by XRF, SEM-EDS, LA-ICP-MS and XRPD. The XRF and SEM-EDS data, subjected to multivariate analysis (cluster analysis), identified the three main construction phases involved in building the Casa di Pansa. In addition, mineralogical and petrographic characteristics of the aggregate were determined and found to be compatible with pyroclastic deposits from the volcano Vesuvius. Study revealed C–S–H phases in the binder, due to pozzolanic hydration phemomena of hydrated lime with cocciopesto and natural pozzalana.     

The pre-Hispanic ceramic technology of South American hunter–gatherers (Paraná River Delta, Argentina): a preliminary archaeometric study

This work presents the preliminary results of studies conducted on pre-Hispanic pottery produced by the South American hunter–gatherer communities that inhabited the Paraná River lowlands during the Late Holocene. The data generated allow advancement of knowledge and discussion regarding the ceramic technologies employed by these groups, which have to date received little archaeological study. Specifically, technological and formal-functional analyses have been performed on a ceramic assemblage from the site of Cerro Puesto Acosta, located in the upper region of delta formed by this high-volume South American river in northeastern Argentina. Both macroscopic and microscopic aspects of these ceramics have been studied using archaeometric techniques (petrographic analysis). The patterns revealed by these analyses suggest the implementation of technological choices oriented towards the creation of vessels especially suitable for the processing, cooking, and serving of foods, which indicates the economic importance of these artifacts in allowing maximum advantage to be taken of the area’s available resources.     

From the Sands of the Ogaden to Black Hawk Down: The End of the Cold War in the Horn of Africa

From the Ogaden War to the Black Hawk Down incident, the Horn of Africa was a theatre of events with far-reaching international consequences. This paper argues that the distinctive process leading to the end of the bipolar conflict in the Horn is crucial to understanding the role of this region both during and after the Cold War. Through an extensive analysis of the period 1985–1991, this article explains why only a few years after the ‘burial’ of SALT II in the sands of the Ogaden, the superpowers withdrew from the region which had been the symbol of the failure of détente. Similarly, an analysis of the end of the Cold War is paramount to understanding why, after the break-up of the USSR, the Horn of Africa hosted one of the most tragic episodes of post-Cold War US foreign policy.     

Revisiting the Linkage: PDD 25, Genocide in Rwanda and the US Peacekeeping Experience of the 1990s

After the successful US–UN action in Operation Desert Storm in 1991, by the mid-1990s Washington's enthusiasm for multilateral action had already faded away. This was evident after the ‘Black Hawk Down’ disaster of the US Mission in Somalia in October 1993 and the release of a much more restrictive peacekeeping policy in May 1994 (PDD-25). The US inaction during the following Rwandan genocide in spring 1994 was then seen as the obvious consequence of the American ‘trauma’ in Somalia, as well as the symbol of Washington's withdrawal from peacekeeping commitments. However, in the light of new archival documents a different scenario emerges. This article shows that the consequential link, often stressed by the literature, between the Somali disaster, the release of PDD-25 and American inaction in Rwanda is much less straightforward. This suggests that the policy in Rwanda was not just a consequence of the Somali debacle and that the reasons for US inaction toward the genocide must be gauged within a broader set of factors. The study of Washington's policy in Rwanda thus becomes a significant case to investigate some broader patterns of post-Cold War American foreign policy and to re-evaluate the US peacekeeping experience of the 1990s.     

Protocol,Potentials, and Limitations of Ancient Teeth 3D Printing

Bioarchaeological analyses of teeth rely traditionally on noninvasive methods that reveal essential information about past individuals and populations. Methodological developments have revolutionized the discipline, but their application is commonly invasive and destructive. The resulting loss of material and information can be buffered through 3D technology applications. Although useful, it is essential that we carefully assess the reliability of these methods, in order to understand what data are preserved and which ones are lost through their application. This study offers a protocol for the implementation of 3D technology in the fabrication of ancient teeth analogs. Analog accuracy was assessed by comparing metric and non-metric traits between the originals and their respective analogs. Results showed that metric traits preserved well, but the preservation of non-metric traits was partially hindered.