title: Analysis of rheological behaviour of titanium feedstocks formulated with a water-soluble binder system for powder injection moulding

authors: Thavanayagam, Gnanavinthan

abstract: Binder selection and formulation are critical in powder injection moulding. Binders play a key role in controlling the rheological properties of a feedstock and influence whether the resulting feedstock can be successfully injection moulded, debound and sintered without defects. A four-step process was used to mix hydride-dehydride titanium alloy (processed) powder (Ti-6Al-4 V) with a polyethylene glycol (PEG) based water soluble binder system. The rheological properties, including flow behaviour index, flow activation energy, fluidity and melt flow index of the homogeneous feedstock, were determined with a capillary rheometer. All feedstock formulations exhibited shear thinning flow behaviour. The optimum feedstock consisting of 60 vol.% powder content, 32 vol.% PEG, 6 vol.% polyvinyl butyryl and 2 vol.% stearic acid was suitable for titanium injection moulding.

text: Analysis of rheological behaviour of titanium feedstocks formulated with a water-soluble binder system for powder injection moulding Binder selection and formulation are critical in powder injection moulding. Binders play a key role in controlling the rheological properties of a feedstock and influence whether the resulting feedstock can be successfully injection moulded, debound and sintered without defects. A four-step process was used to mix hydride-dehydride titanium alloy (processed) powder (Ti-6Al-4 V) with a polyethylene glycol (PEG) based water soluble binder system. The rheological properties, including flow behaviour index, flow activation energy, fluidity and melt flow index of the homogeneous feedstock, were determined with a capillary rheometer. All feedstock formulations exhibited shear thinning flow behaviour. The optimum feedstock consisting of 60 vol.% powder content, 32 vol.% PEG, 6 vol.% polyvinyl butyryl and 2 vol.% stearic acid was suitable for titanium injection moulding.

year: 2014-09

title: An exploration of cloud-based technology for enhancing emergency management: Cases from New Zealand

authors: Lu, Ying

subjects: Cloud-based Technology

abstract: Despite widespread acknowledgement of the disruptive effect cloud-based technologies have in business, little is known about the role they might play in emergency management, in particular in natural emergencies. This research addresses this gap by exploring emergency management professionals’ perceptions of cloud usage in key emergency management lifecycle stages of preparedness and response. The Diffusion of Innovation theory is used as a theoretical lens to understand the factors that might influence emergency management professionals to utilise cloud-based technologies. It was employed as it focuses on understanding the adoption rate of an innovative technology.
A multiple case study approach was employed involving six key New Zealand emergency services organisations. Twenty-nine semi-structured interviews were conducted with emergency professionals at both managerial and operational levels combined with three focus groups and five exercise observations. Data were analysed through grounded theory analysis. 
A comprehensive framework of multi-dimensional elements that influence the emergency professionals’ perceptions of cloud-based technology deployment was derived from the data. Six key elements were found to have significant influences on the emergency professionals’ perceptions against actual cloud-based technology usage in natural emergencies: organisational readiness, coordination, cloud-based technology characteristics, individual perceptions, individual readiness and non- cloud-based technology redundancy. Organisational readiness is shaped by four critical aspects: usage frequency, usage preparedness, organisational capacity, and training, which is a prerequisite for realising the success of cloud-based technology deployment when managing emergencies. Better inter-agency coordination enhances the emergency professionals’ confidence in using cloud-based technologies during the response stage. The cloud-based technology characteristics also significantly influence cloud-based technology deployment, including perceived advantages, perceived disadvantages, usefulness, and the deployment model type. The individual perception of enhancement expectation reflects the emergency professionals’ real needs in using cloud-based technologies when dealing with emergencies. The individual readiness includes human factors and knowledge, showing that personal attitudes towards cloud-based technology usage and cloud-based technology knowledge sufficiency influence cloud-based technology deployment for managing emergencies. Non- cloud-based technology redundancy eases the emergency professionals’ concerns of using cloud-based technologies when unexpected situations occur during natural emergencies. The framework highlights the need for examining diverse elements in an integrated manner to understand the emergency professionals’ utilisation patterns of cloud-based technologies for managing natural emergencies.  
The thesis concludes that awareness of the emergency professionals’ cloud-based technology utilisation patterns can help inform the use of cloud-based technologies to improve and integrate emergency preparations and responses. The research contributes to the body of knowledge in the field of both cloud computing and emergency management by providing a comprehensive framework to reveal an in-depth understanding of multi-dimensional elements that influence the emergency professionals’ perceptions of cloud-based technology deployment in natural emergencies. The framework can be used as practical guidelines for similar emergency services organisations to enhance organisational and individual readiness in cloud-based technology utilisation to carry out more effective emergency management performance.

text: An exploration of cloud-based technology for enhancing emergency management: Cases from New Zealand Despite widespread acknowledgement of the disruptive effect cloud-based technologies have in business, little is known about the role they might play in emergency management, in particular in natural emergencies. This research addresses this gap by exploring emergency management professionals’ perceptions of cloud usage in key emergency management lifecycle stages of preparedness and response. The Diffusion of Innovation theory is used as a theoretical lens to understand the factors that might influence emergency management professionals to utilise cloud-based technologies. It was employed as it focuses on understanding the adoption rate of an innovative technology.
A multiple case study approach was employed involving six key New Zealand emergency services organisations. Twenty-nine semi-structured interviews were conducted with emergency professionals at both managerial and operational levels combined with three focus groups and five exercise observations. Data were analysed through grounded theory analysis. 
A comprehensive framework of multi-dimensional elements that influence the emergency professionals’ perceptions of cloud-based technology deployment was derived from the data. Six key elements were found to have significant influences on the emergency professionals’ perceptions against actual cloud-based technology usage in natural emergencies: organisational readiness, coordination, cloud-based technology characteristics, individual perceptions, individual readiness and non- cloud-based technology redundancy. Organisational readiness is shaped by four critical aspects: usage frequency, usage preparedness, organisational capacity, and training, which is a prerequisite for realising the success of cloud-based technology deployment when managing emergencies. Better inter-agency coordination enhances the emergency professionals’ confidence in using cloud-based technologies during the response stage. The cloud-based technology characteristics also significantly influence cloud-based technology deployment, including perceived advantages, perceived disadvantages, usefulness, and the deployment model type. The individual perception of enhancement expectation reflects the emergency professionals’ real needs in using cloud-based technologies when dealing with emergencies. The individual readiness includes human factors and knowledge, showing that personal attitudes towards cloud-based technology usage and cloud-based technology knowledge sufficiency influence cloud-based technology deployment for managing emergencies. Non- cloud-based technology redundancy eases the emergency professionals’ concerns of using cloud-based technologies when unexpected situations occur during natural emergencies. The framework highlights the need for examining diverse elements in an integrated manner to understand the emergency professionals’ utilisation patterns of cloud-based technologies for managing natural emergencies.  
The thesis concludes that awareness of the emergency professionals’ cloud-based technology utilisation patterns can help inform the use of cloud-based technologies to improve and integrate emergency preparations and responses. The research contributes to the body of knowledge in the field of both cloud computing and emergency management by providing a comprehensive framework to reveal an in-depth understanding of multi-dimensional elements that influence the emergency professionals’ perceptions of cloud-based technology deployment in natural emergencies. The framework can be used as practical guidelines for similar emergency services organisations to enhance organisational and individual readiness in cloud-based technology utilisation to carry out more effective emergency management performance.

year: 2019

title: Changing the acculturation conversation: Indigenous cultural reclamation in Australia and Aotearoa/New Zealand

authors: Dudgeon, Pat

abstract: In constructing this chapter the authors make a claim for an Indigenous perspective that is grounded in decolonisation, the struggle for social justice, cultural reclamation and the development of Indigenous kowledges. This offers the opportunity to view acculturation and the associate research through a different lens. In taking this stance, a critical psychology, Indigenous standpoint approach is adopted, while also acknowledging earlier scholars who have attempted to accommodate Indigenous experiences within acculturation theory and the associated research (see for example, Kvernmo, 2006). This chapter begins with a critique of the acculturation framework and practice in researching the acculturation experience of Indigenous peoples. The chapter then presents findings and application to two contexts: Australia and Aotearoa/New Zealand. (Chapter 11 covers acculturation research in Australia and New Zealand and would thus be relevant to this chapter.) How acculturation research can be linked to cultural reclamation and reconciliation work is then examined.

text: Changing the acculturation conversation: Indigenous cultural reclamation in Australia and Aotearoa/New Zealand In constructing this chapter the authors make a claim for an Indigenous perspective that is grounded in decolonisation, the struggle for social justice, cultural reclamation and the development of Indigenous kowledges. This offers the opportunity to view acculturation and the associate research through a different lens. In taking this stance, a critical psychology, Indigenous standpoint approach is adopted, while also acknowledging earlier scholars who have attempted to accommodate Indigenous experiences within acculturation theory and the associated research (see for example, Kvernmo, 2006). This chapter begins with a critique of the acculturation framework and practice in researching the acculturation experience of Indigenous peoples. The chapter then presents findings and application to two contexts: Australia and Aotearoa/New Zealand. (Chapter 11 covers acculturation research in Australia and New Zealand and would thus be relevant to this chapter.) How acculturation research can be linked to cultural reclamation and reconciliation work is then examined.

year: 2016