The reinvention of the SLAC National Accelerator Laboratory, 1992–2012

This article examines the most recent history of the SLAC National Accelerator Laboratory, with particular emphasis on how this laboratory shifted its research program from accelerator-based particle physics towards astroparticle physics, cosmology and multi-disciplinary photon science. Photon science became the central experimental research program through a series of changes in the organisational, scientific, and infrastructural set-up and in its science policy context. The article shows that SLAC’s reinvention unfolded in a science policy context in which funding priorities drifted towards the materials sciences and the life sciences at the expense of nuclear and particle physics, which had dominated science budgets during the Cold War. SLAC took a lead position in this global development by partly dismantling and also redeploying scientific and technical capabilities from its particle physics program for these new fields, thus, providing novel experimental facilities for user communities to expand across academia and industry.     

Constructing community at civic-ceremonial centers: pottery-making practices at Crystal River and Roberts Island

ABSTRACT

Crystal River (8CI1) and Roberts Island (8CI36, 8CI40, 8CI41) are neighboring mound complexes on Florida’s west-central Gulf Coast, with mainly sequential occupations during the Middle and Late Woodland periods, respectively. Previous work at Crystal River produced assemblages marked by a diversity of pastes and surface treatments, suggestive of distinct communities of practice. However, these excavations were unsystematic and poorly controlled, thus confounding understanding of temporal and spatial variation in practice. Recent excavations in domestic areas, combined with the analysis of older collections from mounds, support a finer-grained understanding of variation in ceramic production. Our analysis suggests that communities of practice persisted through time, although there is variation that corresponds well with changes in settlement.     

Die Region als Planungsraum

Ohne Zusammenfassung     

Reconstructing the Space-Time Structure of the HIV/AIDS Epidemic for the Countries of Western Europe

This paper applies a compartmental epidemic modelling system to the estimation of HIV infection transfers between the nations of Western Europe for the period 1973–98. This multiregional model imitates the formation of disease contacts by both local and international travel, where the latter is assumed to have the lower sensitivity to the effects of spatial separation. This system is calibrated in two stages: first, disease parameter sets are found to best fit the timing of recorded AIDS incidence in each nation; and second, these sets are entered into a multiregion setting to identify the travel parameters that support the lags between these series. The outputs include estimates for the first year of HIV incidence in each country and the subsequent pathways of infection transfer that connect these dates. The results indicate the contrasting roles of the southern and northern countries within the continental epidemic and point to national variations in the recent delaying effects on AIDS incidence of drug combination therapies.