Whistling the Death March? Listening in to the Acoustics of Ludwig Leichhardt's Australian Exploration

Scholars considering the acoustics of exploration have focused on how explorers heard Australian space in terms of silence, to argue this silenced Indigenous presence, or that stillness, was incongruous with how a place to be colonised should sound. I focus on the acoustically attuned Ludwig Leichhardt, a science-poet indebted to the Enlightenment, but also engaged with the German Romantic legacy. The manifold acoustic dimensions of expeditioning – including music – were important to him in different ways. The acoustic world could be assayed and harnessed in ways that were often consistent with colonialism. But there was also something fugitive about acoustics. They could mark a site for emotional engagement with place, and sometimes embryonic cross-cultural dialogue. Yet the possibilities were not always heard and, in line with Romanticism, the acoustic could drag down expeditioners’ spirits just as it could buoy them up. It could baffle or be a site for Indigenous resistance.     

Australia's Nuclear Horizon: Moving Beyond the Drumbeat of Risk Inflation

The 2006 Switkowski review report commissioned by the Howard government highlighted some of the economic and foreign policy benefits that could flow from a major expansion of Australia's uranium export program. It also identified the long-term advantages for Australia's energy security flowing from the development of a national nuclear industry. The report has been condemned by anti-nuclear groups, who argue that proposals for Australia's continuing and, possibly, deeper involvement in the nuclear fuel cycle are unacceptable. The primary risk identified is that Australian uranium exports will contribute to global nuclear proliferation pressures, but claims concerning nuclear-related terrorism are also an increasingly common theme in anti-nuclear commentary. These arguments, in turn, are framed within a broader set of assumptions about the ‘immoral’ nature of any engagement in the nuclear fuel cycle. This article examines the most prominent claims put forward by anti-nuclear proponents and argues that many of them are based on an unnecessary inflation of risk.     

Morphological Characteristics of Healthy and Osteoarthritic Joint Surfaces in Archaeological Skeletons

Osteoarthritis is a major health concern in living populations, as well as being one of the most common pathological lesions identified in the archaeological record. The aetiology of the disease remains unclear, with a multi‐factorial influence of physical strain, age, genetics, and obesity. Previous studies have identified a relationship between the presence of knee osteoarthritis on the distal femoral joint and the morphology of the intercondylar notch, patellar groove, and medial condyle. The current study expands this research to investigate the relationship between distal femoral, distal humeral, and proximal ulnar joint morphology and osteoarthritis with 3D shape analysis techniques. These methods provide a more detailed analysis of joint morphology in order to determine any relationship between 3D shape and osteoarthritis. The results indicate a complex relationship between joint shape and knee osteoarthritis, with eburnated right femora showing a statistically significant association. The shapes associated with eburnated or affected femoral joints can be explained by osteophyte development, and therefore likely represent systematic shape changes and not a particular joint shape predisposing individuals to the condition. There was no identifiable relationship found in the proximal ulna or distal humerus, indicating that joint shape is unlikely to influence the development of the condition in the elbow joint and that any shape changes produced by osteoarthritis are not systematic or quantifiable. The joints analysed in this study were highly influenced by asymmetry, sexual dimorphism, and allometry, resulting in a small sample size of affected joints in many datasets. Further analyses of large skeletal samples are needed to more thoroughly investigate the possible relationship of distal femoral joint shape and osteoarthritis. Copyright © 2013 John Wiley & Sons, Ltd.     

Book reviews

Regions in Europe. Patrick Le Galès and Christian Lequesne (Eds). London, Routledge, 1998, 305. pp., ISBN 0 415 16483 4

Unemployment and Social Exclusion: Landscapes of Labour Inequality. Paul Lawless, Ron Martin and Sally Hardy (Eds). London, Jessica Kingsley 1998, 280 pp., £17.95 pb, ISBN 1 85302 341 8

Cities Back from the Edge. Roberta Brandes Gratz (with Norman Mintz). Chichester, John Wiley, 1998, £24.95, ISBN 0 471 14417 7     

Surface controls on the characteristics of natural CO2 seeps: implications for engineered CO2 stores

CO₂ injected into rock formations for deep geological storage must not leak to surface, since this would be economically and environmentally unfavourable, and could present a human health hazard. In Italy natural CO₂ degassing to the surface via seeps is widespread, providing an insight into the various styles of subsurface ‘plumbing’ as well as surface expression of CO₂ fluids. Here we investigate surface controls on the distribution of CO₂ seep characteristics (type, flux and temperature) using a large geographical and historical data set. When the locations of documented seeps are compared to a synthetic statistically random data set, we find that the nature of the CO₂ seeps is most strongly governed by the flow properties of the outcropping rocks, and local topography. Where low‐permeability rocks outcrop, numerous dry seeps occur and have a range of fluxes. Aqueous fluid flow will be limited in these low‐permeability rocks, and so relative permeability effects may enable preferential CO₂ flow. CO₂ vents typically occur along faults in rocks that are located above the water table or are low permeability. Diffuse seeps develop where CO₂ (laterally supplied by these faults) emerges from the vadose zone and where CO₂ degassing from groundwater follows a different flow path due to flow differences for water and CO₂ gas. Bubbling water seeps (characterized by water bubbling with CO₂) arise where CO₂ supply enters the phreatic zone or an aquifer. CO₂‐rich springs often emerge where valleys erode into CO₂ aquifers, and these are typically high flux seeps. Seep type is known to influence human health risk at CO₂ seeps in Italy, as well as the topography surrounding the seep which affects the rate of gas dispersion by wind. Identifying the physical controls on potential seep locations and seep type above engineered CO₂ storage operations is therefore crucial to targeted site monitoring strategy and risk assessment. The surface geology and topography above a CO₂ store must therefore be characterized in order to design the most effective monitoring strategy.