End-Permian catastrophe by a bolide impact: evidence of a gigantic release of sulfur from the mantle

Our studies in southern China have revealed a remarkable sulfur and strontium isotope excursion at the end of the Permian, along with a coincident concentration of impact- metamorphosed grains and kaolinite and a significant decrease in manganese, phosphorous, calcium, and microfossils (foraminifera). These data suggest that an asteroid or a comet hit the ocean at the end of Permian time and caused a rapid and massive release of sulfur from the mantle to the ocean-atmosphere system, leading to significant oxygen consumption, acid rain, and the most severe biotic crisis in the history of life on Earth.

Chemical composition and tissue energy density of the cuttlefish (Sepia apama) and its assimilation efficiency by Diomedea albatrosses.

The cuttlefish Sepia apama Gray (Mollusca: Cephalopoda) is a seasonally abundant food resource exploited annually by moulting albatrosses throughout winter and early spring in the coastal waters of New South Wales, Australia. To assess its nutritional value as albatross forage, we analysed S. apama for water, lipid protein, ash contents, energy density and amino acid composition. Because albatrosses consistently consume S. apama parts preferentially in the order of head, viscera and mantle, we analysed these sections separately, but did not identify any nutritional basis for this selective feeding behaviour. The gross energy value of S. apama bodies was 20.9 kJ/g dry mass, but their high water content (>83%; cf <70% for fish) results in a relatively low energy density of 3.53 kJ/g. This may contribute to a need to take large meals, which subsequently degrade flight performance. Protein content was typically >75% dry mass, whereas fat content was only about 1%. Albatrosses feed on many species of cephalopods and teleost fish, and we found the amino acid composition of S. apama to be comparable to a range of species within these taxa. We used S. apama exclusively in feeding trials to estimate the energy assimilation efficiency for Diomedea albatrosses. We estimated their nitrogen-corrected apparent energy assimilation efficiency for consuming this prey to be 81.82 ± 0.72% and nitrogen retention as 2.90 ± 0.11 g N kg^-1 d^-1. Although S. apama has a high water content and relatively low energy density, its protein composition is otherwise comparable to other albatross prey species. Consequently, the large size and seasonal abundance of this prey should ensure that albatrosses remain replete and adequately nourished on this forage while undergoing moult.

That's doctor Ginibi to you : hard lessons in the history and publication of Ruby Langford Ginibi

On May Day this year at La Trobe University, a woman who hasblazed the trail of die hard Australian political writing for the past decade finally got some of her due. Ruby Langford - Ginibi in her Bundjalung language - took on the mantle of Honorary Doctor of Letters with all the grace and majesty of her namesake, the black swan. Doctor Ginibi seems a far cry from the Koori woman who built fences in the scrub, fought on the streets for Aboriginal justice, and can show you some pretty angry scars to prove it. Yet the Koori writer, educator, grandmother, auntie and activist reckons it is all part of the same history, all another step in the struggle to realise the justice for her mob that is not only slow coming but, even as she dons the robes of those she is asked to re-educate Koori way, draws further and further into the neocolonial distance.

Technophilia, neo-Luddism, eDependency and the judgement of Thamus

Purpose – The purpose of this paper is to reflect on society's relationship with technology and particularly our increasing dependence on electronic technology – so-called eDependency. The paper argues that technology is not neutral and we must engage with the moral issues that arise from our relationship with it.

Design/methodology/approach – Society's relationship with technology is examined through the lens of Socrates' consideration of the technology of writing. It identifies “technophilia” as a major theme in society and “neo-Luddism” as the Socrates-like examination of the benefits of technology.

Findings – While rejecting both technology determinism and technology presentism the paper argues technology is not neutral and does afford social change within a particular social ecology. The authors suggest that ultimately the use of all technology, including the technology underpinning eDependency, leads to important moral questions which deserve considered debate. The paper concludes by arguing that the Information Systems (IS) discipline should take the mantle of King Thamus and that the study of these issues should become a key concern for the discipline.

Originality/value – In an age of technophilia, this paper calls considered debate on the moral issues that arise from our relationship with technology, how it is appropriated, to whose benefit, and how we change it and will be changed by it.

Mutually assured destruction or co-dependence? The G20 and the UN

The G20 forum has acted to crystallise important changes in the architecture of global governance emerging since the 1970s. This has seen the locus of power shift away from the United Nations (UN) System as smaller and poorer states become increasingly adept at exercising their power within UN structures. Yet it is too simple to set the G20 against the UN, for example as minilateralism versus multilateralism. While the UN seems increasingly constrained and less relevant, it is not about to disappear. Moreover, we argue there are two significant obstacles to the G20 claiming the mantle of dominant global governance institution. First, that minilateralism is still a form of multilateralism, and ultimately subject to the same problems with the generation of consensus if extended, as in the G20, to include sufficiently diverse state members for a claim of legitimacy. Second, its emergence from the Global Financial Crisis and historical focus on financial governance means its agenda is excessively narrow at a time when food and environmental crises command similar global political significance. We conclude by considering some of the different elements of the emerging G20/UN dynamic, and whether this emerging dialectic can enhance prospects for wide ranging reforms to global trade, finance and economic structures that are currently incapable of functioning sustainably or preventing wide scale famine.

Teaching and learning in the crucible: Actors with disabilities as experts preparing pre-service teachers to be inclusive educators

Dorothy Heathcote understood teaching and learning to take place in a kind of ‘crucible’ in which participants, who are both teachers and learners, contribute to the mix sometimes resulting in a radical transformation. This paper reports the ways Heathcote’s ideas have influenced both research and practice in the Teaching for Diversity workshop - a drama workshop that brings together pre-service teachers, teacher educators and actors from Fusion Theatre, a community-based theatre company for people with intellectual disabilities.