X-ray microtomographic imaging of charcoal

We assess the potential of X-ray microtomography as a tool for the non-destructive, three-dimensional examination of the internal structure of charcoal. Microtomographic analysis of a series of charcoals produced by the experimental pyrolysis of pine wood at temperatures from 300 and 600 °C in nitrogen only and in nitrogen mixed with 2% oxygen indicates that, despite substantial shrinkage, observed porosity, pore size and pore connectivity are all increased by pyrolysis and also by chemical oxidation. Analysis of a number of altered and unaltered archaeological and geological charcoals has demonstrated the capacity of the technique to identify and map the distribution of authigenic mineral contamination within charcoal fragments. The results are of significance to radiocarbon dating in that they provide insights into the mechanisms by which charcoal can be contaminated by extraneous carbon in the natural environment.     

The economic effects of PTAs

This paper gives a short history of the development of preferential trade agreements (PTAs), followed by a summary of the economics of PTAs. The paper then examines the typical coverage of recent PTAs, and assesses their likely economic effects. Political economy considerations mean that PTAs have tended to be selective in two important ways—they have tended to be preferential, even in the provisions that go beyond goods trade, and they have tended to target only those provisions that explicitly discriminate against foreigners. This selectivity means that PTAs are an inferior path to deeper economic integration. For most of the Asian region, comprehensive domestic regulatory reform dominates as an integration strategy, while PTAs deliver relatively trivial gains. Multilateral action is an intermediate strategy, and is important for delivering trade liberalisation in sensitive sectors or in highly protected economies. These results appear to be relatively robust to the size of the PTA grouping.     

Beyond Continents,Colours, and the Cold War: Yugoslavia,Algeria, and the Struggle for Non-Alignment

While historians are paying greater attention to the role of the post-colonial Third World in international affairs, there is a tendency to focus on North–South relations and the discourse of the 1955 Bandung Conference. Relying principally on Yugoslav and Algerian archival sources, this paper re-emphasises the dynamic historicity of ‘Third Worldism’ and the significance of ‘South–South’ connections. It explores the evolution of the Third World movement in the decade following Bandung, when smaller countries and non-state movements exerted greater influence while larger actors, such as India and China, quarrelled. The founding of the Non-Aligned Movement (NAM) in 1961 represented a victory for smaller actors who took a more provocative and subversive approach to international relations, to the extent that NAM was a means for the weak to wage the cold war on their terms. Over the following half-decade, Non-Alignment supplanted Afro-Asianism as the primary organisational concept for the Third World, confirming that the Third World was a political project with a potentially unbounded membership rather than the expression of a non-Western, non-white identity.