title: Thermal stability and microhardness of Cu-10vol.%Al2O3nanocomposite produced by high energy mechanical milling

authors: Mukhtar, Aamir

subjects: Nanoscale science

abstract: Cu-10vol.%Al₂O₃ nanocomposite powders were produced using two high energy milling routes and heat treated at 150, 300, 400 and 500°C for 1 hour, respectively, to determine the thermal stability of the microstructure and the micohardness change of the materials as a function of the annealing temperature. Annealing of the as-milled powders at 150°C caused recovery and recrystallisation that leads to significant decrease in dislocation density and slight decrease of microhardness. Increasing the annealing temperature to 400°C causes slight coarsening of the Cu grains and corresponding slight decrease of microhardness. Further increasing the annealing temperature to 500°C causes significant coarsening of the Cu grains and cause significant decrease in microhardness. The effects of different factors on the thermal stability and micohardness change of the Cu- Al₂O₃  are discussed.

text: Thermal stability and microhardness of Cu-10vol.%Al2O3nanocomposite produced by high energy mechanical milling Cu-10vol.%Al₂O₃ nanocomposite powders were produced using two high energy milling routes and heat treated at 150, 300, 400 and 500°C for 1 hour, respectively, to determine the thermal stability of the microstructure and the micohardness change of the materials as a function of the annealing temperature. Annealing of the as-milled powders at 150°C caused recovery and recrystallisation that leads to significant decrease in dislocation density and slight decrease of microhardness. Increasing the annealing temperature to 400°C causes slight coarsening of the Cu grains and corresponding slight decrease of microhardness. Further increasing the annealing temperature to 500°C causes significant coarsening of the Cu grains and cause significant decrease in microhardness. The effects of different factors on the thermal stability and micohardness change of the Cu- Al₂O₃  are discussed.

year: 2010

title: Responding to the urbanisation of Melanesia’s populations: a critical 21st century challenge

authors: Bedford, Richard

subjects: population

abstract: Rowan Callick’s (1993) deliberately provocative ‘doomsday scenario’ for an increasingly impoverished and marginalised Pacific by 2010 was primarily designed to challenge a prevailing tendency at the time towards complacency about medium-term prospects for a region where the great majority of the population remained ruralresident.

text: Responding to the urbanisation of Melanesia’s populations: a critical 21st century challenge Rowan Callick’s (1993) deliberately provocative ‘doomsday scenario’ for an increasingly impoverished and marginalised Pacific by 2010 was primarily designed to challenge a prevailing tendency at the time towards complacency about medium-term prospects for a region where the great majority of the population remained ruralresident.

year: 2010

title: Kaupapa Maori research: An indigenous approach to creating knowledge

authors: Bishop, Russell

subjects: Maori

abstract: This paper seeks to identify how issues of epistemological racism are addressed in practice
within an indigenous Kaupapa (philosophy) Maori approach to research, and how such
considerations may impact on the Western trained and positioned researcher. One fundamental
understanding to a Kaupapa Maori approach to research is that it is the discursive practice
that is Kaupapa Maori that positions researchers in such a way as to operationalise selfdetermination
(agentic positioning and behaviour) for research participants. This is because the
cultural aspirations, understandings and practices of Maori people implement and organise the
research process. Further, the research issues of power; initiation, benefits, representation,
legitimation, and accountability are addressed and understood in practice by practitioners of
Kaupapa Maori research through the development of a participatory mode of consciousness.

text: Kaupapa Maori research: An indigenous approach to creating knowledge This paper seeks to identify how issues of epistemological racism are addressed in practice
within an indigenous Kaupapa (philosophy) Maori approach to research, and how such
considerations may impact on the Western trained and positioned researcher. One fundamental
understanding to a Kaupapa Maori approach to research is that it is the discursive practice
that is Kaupapa Maori that positions researchers in such a way as to operationalise selfdetermination
(agentic positioning and behaviour) for research participants. This is because the
cultural aspirations, understandings and practices of Maori people implement and organise the
research process. Further, the research issues of power; initiation, benefits, representation,
legitimation, and accountability are addressed and understood in practice by practitioners of
Kaupapa Maori research through the development of a participatory mode of consciousness.

year: 1999