ABSTRACTAfter the first Indian peaceful nuclear explosion in 1974 international observers perceived Argentina and Brazil, long-time rivals in South America, as countries that could follow suit. Not only had they not signed the Nuclear Non-Proliferation Treaty (NPT), they had also not joined the Tlatelolco Treaty: the Latin American and Caribbean nuclear-weapon-free zone. In this context, the US began to reassess and tighten its nonproliferation policy, particularly throughout the Jimmy Carter presidency (1977–1981). Carter's foreign policy sought to stall Argentine–Brazilian efforts to master the nuclear fuel cycle, as well as push them toward Tlatelolco. These efforts ultimately proved unsuccessful. However, after a visit to Argentina and Brazil, US congressman Paul Findley suggested in 1977 that they consider a bilateral agreement, whereby they would agree to mutual inspections and renounce the right to conduct peaceful nuclear explosions. Even though it was disregarded at the time, these are the core ideas behind the creation of the Brazilian–Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) established in 1991. This article, then, seeks to fill the gaps in what today constitutes an unknown episode in the dense nuclear nonproliferation history of the 1970s. 相似文献
Geophysical surveys are commonly used in areas where the presence of ancient civilizations is historically documented. These investigations are able to detect through indirect methods the presence of bodies or structures in the subsoil measuring the variations of some physical parameters, obtaining information about archaeological remains without causing harm to them.
In the present study, we investigated the presence of anthropogenic buried cavities partially filled with rubble material, in an area located in the northern part of Cava Ispica, one of the most important archaeological sites located in south-eastern Sicily. The results of seismic refraction prospections, processed with tomographic methods, are presented and discussed. The entire valley contains prehistoric burial sites, Christian catacombs and residential units of various kinds. Despite the numerous searches made over past years, much still remains to be discovered.
The seismic refraction tomographic data, analyzed in 3D, revealed the presence of low velocity values (<400 m/s) areas that, considering the lithotypes locally present and the features of other archaeological structures discovered during previous surveys, can be ascribed to the presence of possible cavities. The obtained results show how such geophysical inspections represent an important preliminary tool for archaeological surveys. 相似文献
The article proposes a synthesis of the major historical works on nineteenth-century European borders. Founded on an original methodological approach, the article advances a rethinking of the concept of ‘territoriality’ traditionally attributed to the rise of modern nation-states. The innovative method adopted is based on combining the focus on spatiality in recent historiography – especially in global history – with the categories and the ethnographic method developed within the border-studies field. The analysis is conducted in two directions. The first focuses on ‘borders’, specifically on some border-creation processes developing throughout the European continent. The second is more centred on European ‘borderlands’, conceived as trans-state and trans-national regions, mainly linked to the space's well-established social practices, familial and economic networks and religious experience. On the one hand, the article highlights how nineteenth-century borders were not simply the product of an institutional decision performed by emerging nation-states, but also the result of an interactive dialectic between state institutions and social actors inhabiting the borderlands. On the other, it shows how the borderlands as cross-border territorial entities continued to exist alongside the new territorial state limits, helping shape a more complex European spatiality than traditionally stated. 相似文献