The generation of new high angle boundaries during the hot torsional deformation of aluminium

The crystallographic rotation field for deformation in torsion is such that it is possible for orientations close to stable orientations to rotate away from the stable orientation. A Taylor type model was used to demonstrate that this phenomenon has the potential to transform randomly generated low-angle boundaries into high-angle boundaries. After imposing an equivalent strain of 1.2, up to 40% of the simulated boundaries displayed a disorientation in excess of 15°. These high-angle boundaries were characterised by a disorientation axis close to parallel with the sample radial direction. A series of hot torsion tests was carried out on 1050 aluminium to seek evidence for boundaries formed by this mechanism. A number of deformation-induced high-angle boundaries were identified. Many of these boundaries showed disorientation axes and rotation senses similar to those seen in the simulations. Between 10% and 25% of all the high-angle boundary present in samples twisted to equivalent strains between 2 and 7 could be attributed to the present mechanism.

The construction of new teacher identities and new collaborative partnerships

There are many different versions of partnerships between teachers and academics and both authors have themselves been involved in various collaborations with classroom teachers. This paper is concerned with the construction of teacher identity within such collaborative partnerships. We will focus on the problematic nature of some of these partnerships by examining the discourses that construct teachers as 'resistant', or 'unwilling' in accounts of collaborative work that was not necessarily successful. In particular we will ask: Why are the relationships seen to be problematic? In whose terms are they problematic? This critique of existing discourses within accounts of collaborative partnerships will allow a rethinking of the relations between teachers and academics. In the conclusion to this paper we will attempt to answer the question: What are the features of particular relationships that can produce shifts in discourses so that teachers are 'truly' located and positioned as collaborative partners?

Fuels of the future : the challenge of new fuel types

Landscape disturbances associated with human activities result in many changes in vegetation structure and floristics. These changes include invasion of native vegetation by both introduced and native species, which leads to the development of 'new' vegetation types. These new vegetation types are often associated with greatly increased fuel loads, and increased levels of fire hazard. Two of these 'new' fuel types are dense thickets of woody weeds, such as Coyote Bush (Baccharis pilularis) and swards of exotic grasses with very high fuel loads, such as Buffel Grass (Cenchrus ciliaris) and Para Grass (Urochloa mutica). The 'new' fuel types which can now be recognized have significant implications for the accuracy of fire behaviour prediction and modelling. For example, modelling fire behaviour in areas invaded by exotic grasses in Australia is problematic, as current grassland fire behaviour models do not allow for the input ofthe high fuel loads associated with these invasive grasses. In forest, McArthur Forest Fire Danger Meters may not be appropriate for forests with significant levels of elevated fuels. Two case studies from southeastern Australia are discussed: the invasion of native vegetation in the urban interface by the woody shrub Burgan (Kunzea ericoides) and invasion of native grasslands by Phalaris (Phalaris aquatica).

Ethical, economic and efficient sector : is it a gamble? The case of New Zealand Health

The New Zealand public sector has gone through major reform as a result of fiscal deficit in 1984 (KettI, 1997; Schwartz, 1997), resulting in shift of emphasis from quality service provision to establishing financial supremacy (Kettl, 1997). This raises concern as to how public sector employees are attaining balance between their service objectives with financial ones and how is the ethics negotiated in this process. Following this concern, this paper focuses on determining the organisational variables consisting of organisational policies in the District Health Boards (DHBs) and hospitals of New Zealand on ethical behaviours of managers and the ethical climate of these departments. The aim of this study is to increase our understanding of the ethical climate of the public health. Our findings suggest that little emphasis has been provided to the aspect of ethics in New Zealand health sector. There is no reward for employees who exhibit exemplary ethical behaviour, no hot line to consult/report about ethics, any detailed guidelines and policies, and not enough ethics-related training provided to staff.

The changing face of the Australian teaching profession : new generations and new ways of working and learning

Today’s workforce is characterised by an increasing mix of people with varying career aspirations, work motivators and job satisfiers. This paper discusses the intergenerational nature of today’s workforce, which is currently dominated by the age groups commonly referred to as Baby Boomers and Generation X. The Baby Boomers defined and redefined work during the last quarter of the twentieth century, but as they track towards retirement, GenXers’ valued work patterns and their career and life aspirations are increasingly dominating. This paper draws on a body of literature about a younger generation of workers and the current world of work in today’s knowledge society, and discusses possible implications for the teaching profession, particularly for attracting and retaining young people as teachers.

Nature of new order rights to minerals : a rubikian exercise since passing the mayday rubicon with a cubic zirconium?

The Mineral and Petroleum Resources Development Act 28 of 2002 has created new categories of rights to "minerals" that may be granted to applicants by the Minister of Minerals and Energy. In this article the nature of these rights will be examined. The legislature has labelled prospecting rights and mining rights to minerals as limited real rights in the MPRD Act. The remaining rights to minerals are not labelled. Provision is made for registration or recording rights in the revived Mining Titles Registration Act 16 of 1967 (as amended). Registered rights are claimed to constitute a limited real right binding against third parties. Discrepancies and contradictions regarding the nature of rights to minerals are created by the two statutes. It is concluded that only upon clarification of the provisions of the two sister statutes, would the nature of rights to minerals be more evident. The proposed amendment of section 5(1) of the MPRD Act would be in line with property doctrine based upon the common law and is to be welcomed.

150 years of democracy? The case of New South Wales

New South Wales has a rich history of parliamentary democracy. As the oldest of the Australian States, it has provided a microcosm of the evolution of modern British-style democracy from the ‘hustings’ of the early colonial to the harbour views of the contemporary politicians’ offices. New South Wales’ political history is also rich with experimentation. The early introduction of the secret ballot, payment for members, the abolition of plural voting, and adult suffrage are well known. Although it needs to be recognized that it followed slightly behind that ‘ Paradise of Dissent’ South Australia on all those features.

Equally fascinating is the role of the Labour Party, whose campaigning on behalf of adult suffrage and payment for Members is fairly well known. Less known, but of great interest, were its activities on behalf of electoral reform, political accountability and easier enrolment and voting, particularly for ‘ itinerants’ at a time when its political base was in the rural workforce. New South Wales Labour was significant for its decision to stand alone, in contrast with its Victorian and New Zealand counterparts, which threw in their lot with the Progressives.

History of contact and change in the Goroka Valley, Central Highlands of New Guinea, 1934-1949

The thesis traces the interaction of the Goroka Valley people with European and coastal New Guinean intruders during the pacification stage of contact and change. In this 15 year period the people moved from a traditional subsistence culture to the threshold of a modern, European-influenced technological society. The contact experiences of the inhabitants of the Valley and the outsiders who influenced them are examined, using both oral and documentary sources. A central theme of this study is the attempts by Europeans and their coastal New Guinean collaborators to achieve the pacification of a people for whom warfare has been described as 'the dominant orientation'. The newcomers saw pacification as being inextricably linked with social, economic and religious transformation, and consequently it was pursued by patrol officers, missionaries and soldiers alike. Following an introductory chapter outlining the pre-contact and early-contact history of the Goroka Valley people, there is a discussion of the causes of tribal fighting in Highlands communities and two case studies of violent events which, although occurring beyond the Goroka Valley, had important consequences for those who lived within its bounds. The focus then shifts to the first permanent settlement of the agents of change -initially these were coastal New Guinean evangelists and policemen - and their impact on the local people. A period of consolidation is then described, as both government and missions established a permanent 'European presence in the Valley'. This period was characterised by vigorous pacification coupled with the introduction of innovations in health and education, agriculture, technology, law and religion. The gradual transformation of Goroka Valley society as a result of the people's interaction with the newcomers was abruptly accelerated in 1943, when many hundreds of Allied soldiers occupied the Valley in anticipation of a threatened Japanese invasion. Village life was disrupted as men were conscripted as carriers and labourers and whole communities were obliged to grow food to assist the Allied war effort. Those living close to military airfields-and camps were subject to Japanese aerial attacks and the entire population was exposed to an epidemic of bacillary dysentery introduced by the combatants. However the War also brought some positive effects, including paradoxically, the almost total cessation of tribal fighting, the construction of an ail-weather airstrip at Goroka which ensured its future as a town and administrative and commercial centre, and the compulsory growing of vegetables, coffee, etc, which laid the foundations for a cash economy and material prosperity. The final chapter examines the aftermath of military occupation, the return of civil administration and the implementation of social and economic policies which brought the Goroka Valley people into the rapid-development phase of contact. By 1949 Gorokans were ready to channel their aggressive energies into commercial competitiveness and adopt a cash-crop economy, to accept the European rule of law, to take advantage of Western innovations in medicine, education, transport and communications, to seek employment opportunities at home and in other parts of the country and to modify their primal world view with European religious and secular values. A Stone Age people was in process of being transformed into a modern society.