Chemical composition of architectural plaster at the Classic Maya kingdom of Piedras Negras,Guatemala

Architectural plaster from elite masonry structures at the Classic Maya kingdom of Piedras Negras, Guatemala, is examined. Chemical composition is determined through X-ray fluorescence and compared statistically. Based on this sample, it was observed that any single masonry building was coated with plaster made from a single source of limestone and limestone-based aggregate, but that architectural plaster from different buildings across the site varied in chemical composition. It is concluded that this pattern is best accounted for by a model of rotational labor obligations to the state, with spatially distinct groups being responsible for manufacturing plaster for specific buildings.     

The application of 3D laser scanning technology to the assessment of ordinal and mechanical cortex quantification in lithic analysis

Recent studies make use of cortex proportion as a proxy measurement for the impact of artefact transport on assemblage formation. Cortex in these studies is measured on an ordinal scale and analysed in relation to mechanical measurements of artefact size. Here we report on the use of a 3D laser scanner to obtain precise measurements from experimental lithic reduction sets. High-resolution measurements of cortex area are compared to measurements obtained through ordinal approximations of cortex proportion and mechanical approximations of artefact size. While the ordinal and mechanical measurements result in considerable error for individual artefacts, estimates improve significantly as sample size increases.     

Diet choice, risk, and food sharing in a stochastic environment

Foraging models can predict the optimal diet selection for an organism which has the goal of maximizing its net acquisition rate for energy while hunting and gathering. Here a simulation methodology is used to determine the optimal diet selection under the assumption that the forager's goal is to minimize the risk of an energy shortfall. The results show that the rate-maximizing and risk-minimizing diets are similar; that sharing is more effective than changes in diet in reducing risk; and that the risk-reduction which can be obtained from sharing requires quite small numbers of participants. Food sharing may be an ancient and pervasive feature of hominid foraging adaptations.     

The rhetoric of consensus

Bob Hawke has used the notion of consensus in three distinct ways. The term was first employed as a polemic to discredit the Fraser government and establish Hawke's claim to the ALP leadership. It then became shorthand for the political program Hawke put forward during the 1983 election campaign. Finally — and perhaps most ambitiously — it sought a new philosophical twist for Australian politics. By 1985, however, the concept lacked credibility and was quietly abandoned as polemic, program or government philosophy. The rhetoric of consensus, for all its success, was short‐lived in its usefulness.     

Mercantile Transformations: Understanding the State,Global Debt and Philippine Agriculture

This paper examines an important continuity in the political economy of the Philippines: the interplay between domestic merchant capitalists and the state over the role of the state in the Philippine economy. During the Marcos regime, this interplay increasingly took the form of competition between state mercantile interests and ‘private’ merchant interests. This competition is still being played out. To better understand the nature of the competition, consideration is focused on two essential contemporary facts: the Philippines has a major external debt crisis and the Philippines, still predominantly an agrarian country, suffers from stagnant productivity growth and enduring rural poverty. While the Philippine external debt problem can be attributed in significant part to various international hegemonic interests, the analysis concludes that the characteristics of the crisis primarily reflect changing state/class/economy configurations within the Philippines. These same configurations, in turn, significantly influence the implications of the external debt crisis on Philippine agriculture.