Rapidly solidified NiAl and FeAl

Melt spinning was used to produce rapidly solidified ribbons of the B2 intermetallics NiAl and FeAl. Both Fe-40Al and Fe-45Al possessed some bend ductility in the as spun condition. The bend ductility of Fe-40Al, Fe-45Al, and equiatomic NiAl increased with subsequent heat treatment. Heat treatment at approximately 0.85 T (sub m) resulted in significant grain growth in equiatomic FeAl and in all the NiAl compositions. Low bend ductility in both FeAl and NiAl generally coincided with intergranular failure, while increased bend ductility was characterized by increasing amounts of transgranular cleavage fracture

Dislocation analysis of a complex sub-grain boundary using accurate electron channeling contrast imaging in a scanning electron microscope

International audienceIn this work, accurate electron channelling contrast imaging (A-ECCI) assisted by high resolution selected area channelling patterns (HR-SACP) was used to characterize the structure of a complex low sub-grain boundary in a creep deformed uranium dioxide (UO$_2$) ceramic. The dislocations were characterized using TEM-style g·b = 0 and g·b × u = 0 contrast criteria. Misorientations across the boundary were measured using HR-SACPs with 0.04° precision and high accuracy EBSD. The boundary was determined to be asymmetric and mixed in nature, composed of two distinct regions with different dislocation morphologies and a misorientation below 0.5°. The A-ECCI, HR-SACP, and HR-EBSD results are consistent, confirming A-ECCI as a powerful tool for characterizing even complex dislocations structures using scanning electron microscopy. This is particularly true for UO$_2$, since this material is very difficult to thin, which makes TEM examination of sub-boundaries over the scale of several micrometers difficult. Furthermore, in this study, the change in dislocations arrangement along the breath of the complex low angle sub-grain boundary is related to the misorientation across the boundary

Adapting the Australian livestock and wheat farms to climate change: value of adaptation at cross-regional scale

The GRAZPLAN biophysical models were used to simulate the dynamics of coupled climate-soil-grassland-livestock systems at 25 representative farms across Australia’s extensive grazing region under historical and a range of projected climates (4 GCMs at 2030, 2050 and 2070 under SRES A2 scenario). The modelling analysis suggests that primary production of grasslands and livestock are likely to decrease across most of southern Australia’s grazing lands under future climate. By including changes in on-farm management in our models we were able to evaluate the effectiveness of certain adaptation options. Options considered individually were not always effective but a combination of Incremental grassland management and animal genetic improvement options (currently available to graziers) was able to offset productivity declines at cross-regional scale. Through implementation of the optimal combination of adaptation options, profitability across southern Australia was shown to increase by +69%, +84% and +116% in 2030, 2050, and 2070, compared to no adaptation. Optimal systemic adaptation could make addition of $A 2.00 billion in 2030,$A 2.10 billion in 2050, and $A 2.12 billion in 2070 to industry with current farm management. In comparison with historical production, adaptation value to industry would be$A 1.51 billion in 2030, $A 1.51 billion in 2050, and$A 1.12 billion in 2070 (all for a full adaption). If the most-profitable combination of adaptations is used at the baseline instead of the current-practice, then the optimal combinations of grassland adaptations would provide a further increase in operating profitability at 28%, 28%, and 16% of sites in 2030, 2050, and 2070. If the livestock genetic adaptations –cannot be adopted at the present for lack of seed stock – are also included, the optimal systemic adaptations would be more profitable than the alternative baseline including grassland management options at 60%, 56%, and 48% of the locations in 2030, 2050, and 2070. We discuss 3 conceptual issues which arose during our study: (i) how to estimate impact when current management is environmentally infeasible under future climates; (ii) estimating the effectiveness of combinations of adaptations, only some of which are currently available to graziers; and (iii) dealing with the tension between modelling best-practice systems, so that present and future can be compared, versus modelling typical practice for economic valuation

Linking adaptation science to action to build food secure Pacific Island communities

Climate change is a major threat to food security in Pacific Island countries, with declines in food production and increasing variability in food supplies already evident across the region. Such impacts have already led to observed consequences for human health, safety and economic prosperity. Enhancing the adaptive capacity of Pacific Island communities is one way to reduce vulnerability and is underpinned by the extent to which people can access, understand and use new knowledge to inform their decision-making processes. However, effective engagement of Pacific Island communities in climate adaption remains variable and is an ongoing and significant challenge. Here, we use a qualitative research approach to identify the impediments to engaging Pacific Island communities in the adaptations needed to safeguard food security. The main barriers include cultural differences between western science and cultural knowledge, a lack of trust among local communities and external scientists, inappropriate governance structures, and a lack of political and technical support. We identify the importance of adaptation science, local social networks, key actors (i.e., influential and trusted individuals), and relevant forms of knowledge exchange as being critical to overcoming these barriers. We also identify the importance of co-ordination with existing on-ground activities to effectively leverage, as opposed to duplicating, capacity

Provinciality and the Art World: The Midland Group 1961- 1977

This paper takes as its focus the Midland Group Gallery in order to first, make a case for the consideration of the geographies of art galleries. Second, highlight the importance of galleries in the context of cultural geographies of the sixties. Third, discuss the role of provinciality in the operation of art worlds. In so doing it explicates one set of geographies surrounding the gallery – those of the local, regional and international networks that connected to produce art works and art space. It reveals how the interactions between places and practices outside of metropolitan and regional hierarchies provides a more nuanced insight into how art worlds operated during the sixties, a period of growing internationalism of art, and how contested definitions of the provincial played an integral role in this. The paper charts the operations of the Midland Group Gallery and the spaces that it occupied to demonstrate how it was representative of a post-war discourse of provincialism and a corresponding re-evaluation of regional cultural activity

Photography as an act of collaboration

The camera is usually considered to be a passive tool under the control of the operator. This definition implicitly constrains how we use the medium, as well as how we look at – and what we see in – its interpretations of scenes, objects, events and ‘moments’. This text will suggest another way of thinking about – and using – the photographic medium. Based on the evidence of photographic practice (mine and others’), I will suggest that, as a result of the ways in which the medium interprets, juxtaposes and renders the elements in front of the lens, the camera is capable of depicting scenes, events and moments that did not exist and could not have existed until brought into being by the act of photographing them. Accordingly, I will propose that the affective power of many photographs is inseparable from their ‘photographicness’ – and that the photographic medium should therefore be considered as an active collaborator in the creation of uniquely photographic images

Foucault, the museum and the diagram

Foucault’s work on the museum is partial and fragmentary but provides an interesting opportunity through which to explore issues of power, subjectivity and imagination. Following a discussion of Deleuze’s reading of Foucault and his introduction of the issue of diagram as a way of understanding the discursive and visual operation of power, the paper explores some of Foucault’s work from the period around 1967-9 on the non-relation to explore how he engaged with the question of seeing/saying that Deleuze identifies as a key problematic in his work. Through analysis of Foucault’s discussions of the themes of the outside, heterotopia and the work of the painter Manet, in the context of the museum, the paper explores how power operating through the diagram of the museum allows us to understand the space of imagination as one in which subjectivity is constituted

A rapid assessment framework for food system shocks: lessons learned from COVID-19 in the Indo-Pacific region

The frequency and severity of shocks to food systems is accelerating globally, exemplified by the current COVID-19 outbreak. In low- and middle-income countries, the impacts have exacerbated existing food system vulnerabilities and poverty. Governments and donors must respond quickly, but few tools are available that identify interventions to build food system resilience, or emerging opportunities for transformation. In this paper we reflect on the application of a systems-based rapid assessment which we applied across 11 Indo-Pacific countries in May-July 2020. Our approach was shaped by three design parameters: the integration of key informants’ perspectives engaged remotely within the countries, applicability to diverse food systems and COVID-19 experiences across the region, and the consideration of food systems as complex systems. For the rapid assessment we adopted an analytical framework proposed by Allen and Prosperi (2016). To include a development lens, we added the analysis of vulnerable groups and their exposure, impacts, recovery potential and resilience, and pro-poor interventions. We concluded that the framework and approach facilitated integration and triangulation of disparate knowledge types and data to identify priority interventions and was sufficiently flexible to be applied across food systems, at both national, sub-national and commodity scales. The step-wise method was simple and enabled structured inquiry and reporting. Although the systems concepts appeared more easily transferrable to key informants in some countries than others, potentially transformational interventions were identified, and also some risks of maladaptation. We present a refined framework that emphasises analysis of political, economic and institutional drivers of exposure and vulnerability, the constraints that they pose for building recovery potential and resilience, and trade-offs amongst winners and losers inherent in proposed interventions

Games People Play: The Collapse of “Masculinities” and the Rise of Masculinity as Spectacle

Perspective is important. When Andy Warhol produced an art piece of 13 police mugshots of “Thirteen Most Wanted Men” for the New York World’s Fair in 1964, the work was hurriedly painted over by concerned authorities before the public could view it. It was only years later that the Warhol’s subversive (homoerotic) gaze on the FBI list was more widely appreciated (Crimp in Social Text 59: 49–66, 1999; Siegel in Art Journal 62(1): 7–13, 2003). I begin with this story because it points to key issues I want to take up in this chapter, in particular, the importance of “audience” and different readings when it comes to masculinity. While current theory tends to locate masculinity in the actors, what if it is better located in the audience? What if masculinity was better understood as a kind of public spectacle? In addition, there are the naturally subversive elements of gender (e.g. think of drag performances); the game-like nature of masculinity (men might feel compelled to play along with expectations of masculinity—think of brutal playground expectations on boys—but it doesn’t mean they are not aware of its inauthenticity); and the inevitable—but less discussed link—with sexuality (see below)

Introduction : narcissism, melancholia and the subject of community.

Sigmund Freud’s twin papers, ‘On Narcissism: An Introduction’ (1914) and ‘Mourning and Melancholia’ (1917 [1915]), take as their formative concern the difficulty of setting apart the ‘inner’ and the ‘outer’ worlds, and of preserving a stable image of a boundaried self. Whilst it is true that the term narcissism especially has come to be deployed in ways that seem foreign to the complexities of Freud’s 1914 paper (by its reduction to a personality disorder or its use as a broad-brush cultural diagnosis), we suggest in this introductory chapter that neither narcissism nor melancholia can be thought about today without expressing some debt to Freudian metapsychology. However, whereas Freud was most evidently concerned to describe the structure of ego-formation, subsequent commentators have preferred to emphasize the cultural and normative dimensions of these terms. Accordingly, we consider the respective discursive histories of narcissism and melancholia and find that although they have been put to work in very different ways they remain grounded by a shared concern with mechanisms of relation and identification. Indeed, this shared concern is the basis upon which they’ve been most productively reanimated in recent years: the rise of melancholia as a critical aid to the study of cultural displacement and dispossession, and the determined redemption of narcissism from its pejorative characterization as fundamentally anti-social. We argue that what is most noteworthy in this post-Freudian literature is the increasing relevance of metapsychology to social and political theory. The language of psychoanalysis, extrapolated from the clinic, permits a detailed examination of the boundaries which construct and challenge the terms of social solidarity. Specifically, this takes place though careful reading of the complex practices of (dis)identification at the heart of ego-formation (at both individual and group levels), and the associated mechanisms of defence, for example: introjection, incorporation, projective-identification, and splitting. By recognising the complexity of how communities get made, and connecting this with recent literature on counter publics and the commons, we demonstrate that Freud’s frameworks of narcissism and melancholia remain essential for any contemporary understanding of political association