title: Effect of Mn on the Properties of Powder Metallurgy Ti-2.5Al-xMn Alloys.

authors: Alshammari, Yousef Namlan

subjects: blended elemental

abstract: Titanium alloys are the ideal material for a wide range of structural applications, but their high cost compared to other metals hinders their adoption. Powder metallurgy and cheap alloying elements can be used to create new Ti alloys. In this study, the simultaneous addition of Al and Mn is considered to manufacture and characterise ternary Ti-2.5Al-Mn alloys obtained via pressing and sintering by varying the Mn content (1-10 wt.%). It is found that the addition of the alloying elements reduces compressibility. Consequently, the amount of porosity increases (8.5 → 10.8%) with the amount of Mn as the alloys were processed under the same conditions. The progressive addition of Mn refines the classical lamellar microstructure and, eventually, transforms it into an equiaxed β-grain structure with acicular α grains. The microstructural changes lead to continuous increases in strength (ultimate tensile strength: 694 → 851 MPa) and hardness (225 → 325 HV30) with an associated loss of ductility (elongation to failure: 13.9 → 1.0%). However, the obtained ternary Ti-2.5Al-Mn alloys have similar or better overall mechanical behaviour than most of the binary Ti-Mn alloys obtained through a variety of manufacturing methods.

text: Effect of Mn on the Properties of Powder Metallurgy Ti-2.5Al-xMn Alloys. Titanium alloys are the ideal material for a wide range of structural applications, but their high cost compared to other metals hinders their adoption. Powder metallurgy and cheap alloying elements can be used to create new Ti alloys. In this study, the simultaneous addition of Al and Mn is considered to manufacture and characterise ternary Ti-2.5Al-Mn alloys obtained via pressing and sintering by varying the Mn content (1-10 wt.%). It is found that the addition of the alloying elements reduces compressibility. Consequently, the amount of porosity increases (8.5 → 10.8%) with the amount of Mn as the alloys were processed under the same conditions. The progressive addition of Mn refines the classical lamellar microstructure and, eventually, transforms it into an equiaxed β-grain structure with acicular α grains. The microstructural changes lead to continuous increases in strength (ultimate tensile strength: 694 → 851 MPa) and hardness (225 → 325 HV30) with an associated loss of ductility (elongation to failure: 13.9 → 1.0%). However, the obtained ternary Ti-2.5Al-Mn alloys have similar or better overall mechanical behaviour than most of the binary Ti-Mn alloys obtained through a variety of manufacturing methods.

year: 2023-07-10

title: Acceptance, recognition and supported independence: Wellbeing for children and young people with a disability in New Zealand: The voice of youth with Down Syndrome

authors: Kirk, Maree Louise

subjects: Wellbeing

abstract: The aim of this thesis is to identify what wellbeing means for children and young people with a disability and the factors that influence wellbeing in the home, school, and the community. The research was carried out through consecutive interviews that captured children’s voice through the methods of visual sociology. Grounded theory was the basis for the analysis which produced rich data to describe the lives of these young people with Down syndrome. 
In addition, interviews were undertaken with parents and service providers at a local and national level to gain an insight into the celebrations and challenges of the everyday lives that were experienced by the young people and their families. Service provision was examined from the perspective of all three groups of participants.
Wellbeing is a complex phenomenon and although there has been increasing interest in this field, particularly for children, there is a dearth of research about wellbeing for children and young people with a disability. The findings of the research pointed to three key principles of wellbeing: acceptance, recognition, and supported independence.
These three key principles form the basis of three models in the findings. The first model is an ecological perspective; it illustrates how the level at which policy is introduced and implemented intersects and works to benefit or hinder the service provision in schools and for the children and their families. 
The second model—the dimensions of wellbeing for children and young people—emerged from the data and was used in conjunction with the ecological perspective model to develop the supporting teaching practice for students with Down syndrome and learning disability programme. The third model is, therefore, a capability model for schools. 
The result of the research is the creation of practical tools that can be used to review policy and service provision with the aim of ensuring that children and young people with a disability enjoy entitlements equal to those of all children in New Zealand.

text: Acceptance, recognition and supported independence: Wellbeing for children and young people with a disability in New Zealand: The voice of youth with Down Syndrome The aim of this thesis is to identify what wellbeing means for children and young people with a disability and the factors that influence wellbeing in the home, school, and the community. The research was carried out through consecutive interviews that captured children’s voice through the methods of visual sociology. Grounded theory was the basis for the analysis which produced rich data to describe the lives of these young people with Down syndrome. 
In addition, interviews were undertaken with parents and service providers at a local and national level to gain an insight into the celebrations and challenges of the everyday lives that were experienced by the young people and their families. Service provision was examined from the perspective of all three groups of participants.
Wellbeing is a complex phenomenon and although there has been increasing interest in this field, particularly for children, there is a dearth of research about wellbeing for children and young people with a disability. The findings of the research pointed to three key principles of wellbeing: acceptance, recognition, and supported independence.
These three key principles form the basis of three models in the findings. The first model is an ecological perspective; it illustrates how the level at which policy is introduced and implemented intersects and works to benefit or hinder the service provision in schools and for the children and their families. 
The second model—the dimensions of wellbeing for children and young people—emerged from the data and was used in conjunction with the ecological perspective model to develop the supporting teaching practice for students with Down syndrome and learning disability programme. The third model is, therefore, a capability model for schools. 
The result of the research is the creation of practical tools that can be used to review policy and service provision with the aim of ensuring that children and young people with a disability enjoy entitlements equal to those of all children in New Zealand.

year: 2019

title: Challenges to psychology in Aotearoa

authors: Awatere-Huata, Donna

subjects: Maori

abstract: Maori people are putting up with a lot right now. If governments can transfer $20 billion in the past ten years for hand outs and write offs to Pakeha people who have endured little, then they can do a lot better than the $150 million they’ve transferred to our people that have endured so much for 150 years.  The big issue is still the Treaty, and the need to re-negotiate this nation’s management. The challenge is to design a political system that is based on Maori ways of doing things rather than Pakeha ways of doing things. To achieve this requires relinquishing colonial patterns of thinking and the certainty that pakeha people and their ways are superior to Maori. For psychologists the issue is their role in maintaining Pakeha economic and political power. It may well be that psychologists provide lousy value for money from the Maori point of view, but provide excellent value for money from the government’s point of view.

text: Challenges to psychology in Aotearoa Maori people are putting up with a lot right now. If governments can transfer $20 billion in the past ten years for hand outs and write offs to Pakeha people who have endured little, then they can do a lot better than the $150 million they’ve transferred to our people that have endured so much for 150 years.  The big issue is still the Treaty, and the need to re-negotiate this nation’s management. The challenge is to design a political system that is based on Maori ways of doing things rather than Pakeha ways of doing things. To achieve this requires relinquishing colonial patterns of thinking and the certainty that pakeha people and their ways are superior to Maori. For psychologists the issue is their role in maintaining Pakeha economic and political power. It may well be that psychologists provide lousy value for money from the Maori point of view, but provide excellent value for money from the government’s point of view.

year: 1993