Modern and fossil charcoal: aspects of structure and diagenesis

The structures and compositions of modern and fossil charcoal samples were compared in order to evaluate charcoal degradation processes in archaeological sites. Modern charcoal samples produced in campfires contain two major phases: graphite-like microcrystallites and a non-organized phase. These phases create a mosaic-like structure with differing relative proportions depending on the taxonomic source of the wood used. Fossil charcoal samples (Tel Dor, Israel: 3000 years BP and Kebara Cave, Israel: 40,000 years BP) also contained the graphite-like microcrystallites and the non-organized phases, but were clearly altered compared to modern charcoal. The graphite-like phase of the fossil charcoal has much higher electrical resistivity, and its ESR properties show that it has markedly altered surface electronic states. Infrared spectra show the presence of additional carboxylate groups. Oxidation has therefore altered the structure. This appears to be a “self-humification” process that affects the graphitic component, and probably the non-organized phase as well.     

A Cross-Cultural Study of Young Children's Mapping Abilities

The mapping abilities of four-year-old children in York, England, Durban, South Africa, Tehran, Iran, Mexico City, Mexico and Evanston, Illinois, USA were investigated, using a methodology involving air-photo identification and simulated navigation on an air photo. The results show that essential mapping abilities (perspective and scale transformations) are well developed by the age of four in these cultures, and provide some evidence in support of the hypothesis that mapping abilities emerge without training in very young children of all cultures.     

MASCULINISM,THE USE OF DUALISTIC EPISTEMOLOGIES AND THIRD SPACES*

First, this paper establishes a ground from which to question not only the relationship between power and knowledge in the construction of geographical knowledge, but also the gendering of this relationship. From this starting position, second, it is argued that dualisms permit the gendering of particular binary opposites. The argument is not that certain dualistic categories - such as Reason and Emotion or Time and Space - are inherently wrong or to deny that western societies are organized through them, at least in part. Instead, dualisms are shown - at particular times and in particular places - to mark and help police supposedly fixed, natural divisions between the powerful and the disempowered (as in the masculine versus the feminine). In assuming away dualistic economies of meaning, the danger is that this helps to maintain the reproduction of the power-ridden values which dualisms help to sustain. Indeed, it is because dualist architectures are not as fixed, stable or natural as they are meant to be (i.e., precisely because they need to be policed) that it is possible to refuse them. Finally, this paper describes one alternative episte-mology which draws on the notion of a third space. The idea of third spaces uses a spatial metaphor to suggest an alternative radical geography which mobilizes place, politics and hybrid identities. One such third space is illustrated by an empirical example.     

Spatial Analysis of the Factors Contributing to the Relationship between the Transient,Meridional Eddy Sensible,and Latent Heat Flux in the Southern Hemisphere

In this paper principal component analysis (PCA) and singular value decomposition (SVD) are used to define the importance of the variables contributing to the relationship between the transient latent and sensible heat fluxes and to show their temporal and spatial variation. SVD is offered as an alternative means of isolating spatial and temporal structures in data with the advantage that it can depict simultaneous space‐time variations that are aggregates of the results produced by PCA. Both methods of analysis produced two very important uncorrelated modes of variability in January and July, indicating that the transient heat fluxes are influenced by few controlling factors. We suggest that these modes of variability represent the influences of the meridional temperature gradient, atmospheric moisture, and activity within the source and sink regions of the transient heat fluxes. The physical relationships between the heat fluxes that appear to represented by the statistical modes of variability are discussed.     

Intervention publique sur le développement de grappes industrielles au Québec

This article describes the conditions for the development of four industrial clusters and the mechanisms of their integration in the regional economy. The case studies are the aerospace and apparel clusters in Montreal, and the agri‐food and marine science and technology clusters in the Lower St. Lawrence region. Clusters are defined as arrangements of businesses, government actors, public authorities, and local intermediary organizations in a local area. However, the study shows that clusters are based on actors and processes operating at different scales, from the local to the global. It also shows the importance of the sectoral leadership acknowledged by the different stakeholders.     

Sediments exposed to high temperatures: reconstructing pyrotechnological processes in Late Bronze and Iron Age Strata at Tel Dor (Israel)

Many of the sediments analysed from Tel Dor (Israel) show structural alterations indicating that they were exposed to high temperatures. This observation is consistent with the abundant evidence for use of pyrotechnology from the earliest exposed Middle Bronze Age strata through the Roman period. Such structurally altered sediments may well represent one of the more widespread and durable records of pyrotechnology, and as such could be invaluable for reconstructing past human activities. The specific aims of this research are therefore to develop the means for identifying local sediments that were altered by different pyrotechnological activities and to elucidate the varying circumstances whereby sediments were exposed to high temperatures in a Late Bronze and Iron Age 1 section.     

Mauna Kea: Two Cultures and the 'Imiloa Astronomy Center

When Snow wrote delivered his lecture on ‘The Two Cultures’ in 1959, he considered this to be a phenomenon that had British, Western and global significance. This article looks at how Snow's ideas play out in the setting of Hawai'i from the early contact with Western navigators through to current disputes over the building of the Thirty Meter Telescope (TMT) atop Mauna Kea. ‘Mutual incomprehension’, identified by Snow as the chief characteristics of his two cultures are clearly seen to be at play in Western-Hawai'ian encounters.

This article places the TMT disputes in the setting of the Hawai'ian Renaissance, a movement that has gathered pace since the 1960s. It looks Gieryn's notions of ‘boundary work’ and that of Star and Griesemer on ‘boundary objects’ as ways of framing the discussion. The final focus of the article is the 'Imiloa Astronomy Center in Hilo as a ‘place of safe disagreement’.