title: Preparation and mechanical properties of novel bio-composite made of dynamically sheet formed discontinuous harakeke and hemp fibre mat reinforced PLA composites for structural applications

authors: Pickering, Kim L.

subjects: Science & Technology

abstract: The objective of this study was to fabricate and assess the structure and mechanical performance of PLA reinforced by aligned discontinuous alkali treated natural fibre mats. The novel aspect of this work was in terms of composite processing, in particular, the use of fibre mats produced using a dynamic sheet former (DSF) wherein discontinuous treated fibres were aligned. Composites with different fibre weight contents were assessed using optical microscopy, scanning electron microscopy (SEM) and tensile testing. It was found that the fibres had a reasonable degree of alignment parallel to the DSF rotation direction together with good fibre dispersion. Tensile strengths of harakeke and hemp composites up to 101.6 MPa and to 87.3 MPa were achieved, approximately 90 and 60% higher respectively than PLA (53.9 MPa). It was also found that minimum and critical fibre volume fractions for harakeke and hemp fibre composites were lower than that found for injection moulded composites, due to better reinforcement efficiency obtained as a result of increased fibre alignment.

text: Preparation and mechanical properties of novel bio-composite made of dynamically sheet formed discontinuous harakeke and hemp fibre mat reinforced PLA composites for structural applications The objective of this study was to fabricate and assess the structure and mechanical performance of PLA reinforced by aligned discontinuous alkali treated natural fibre mats. The novel aspect of this work was in terms of composite processing, in particular, the use of fibre mats produced using a dynamic sheet former (DSF) wherein discontinuous treated fibres were aligned. Composites with different fibre weight contents were assessed using optical microscopy, scanning electron microscopy (SEM) and tensile testing. It was found that the fibres had a reasonable degree of alignment parallel to the DSF rotation direction together with good fibre dispersion. Tensile strengths of harakeke and hemp composites up to 101.6 MPa and to 87.3 MPa were achieved, approximately 90 and 60% higher respectively than PLA (53.9 MPa). It was also found that minimum and critical fibre volume fractions for harakeke and hemp fibre composites were lower than that found for injection moulded composites, due to better reinforcement efficiency obtained as a result of increased fibre alignment.

year: 2016-06-01

title: Healing Pluralism and Responsibility: An Anthropological Study of Patient and Practitioner Beliefs

authors: Miskelly, Philippa Ann

subjects: medical pluralism

abstract: Combining the use of alternative and complementary therapies and orthodox medicine is an increasing phenomenon.  This thesis examines the implications of mixing and matching plural healing modalities against a backdrop of patient and practitioner responsibilities.   

From an anthropological perspective, the predominant use of qualitative methodology is an integral part of this research project.  Central to this study is the views of a variety of participant categories - patients who use both alternative and orthodox healing methods; non-medical alternative and complementary practitioners; medical doctors who integrate orthodox and CAM therapies into their daily practise; and orthodox general practitioners.  Interviews with these participants took place over an eighteen-month timeframe and involved face-to-face interviews, telephone interviews, and focus group research.   Social constructionist theory, which forms part of the compendium of interpretive theoretical approaches adopted under the medical anthropology paradigm, has been used in order to expose the beliefs patients and practitioners hold about their own responsibilities, and those of the other participant categories.

This study reveals a palimpsest of complex, contradictory and competing discourses in relation to patient and practitioner expectations and responsibilities.  One important finding relates to the significance of neo-liberal and individualistic ideologies. This thesis concludes that the rhetoric from complementary and alternative practitioners, and their integrative colleagues, is heavily imbued with ideas about self-responsibility, particularly in relation to patient lifestyle choices and therapeutic compliance.   Patients and orthodox general practitioners share some of these views but in general adopt a more collective approach to health care responsibilities.  While patients are prepared to accept some responsibility for their illnesses and health keeping practises, they express strong reliance towards the orthodox health model as well as those doctors who practise integrative medicine.   However the same cannot be said of their attitudes towards CAM modalities where considerable ambivalence is evident towards both practitioners and the therapies themselves.   

The role of the state, and its responsibilities for the structure of the health care system in New Zealand, is also clearly influential in the construction of belief systems.  This is especially so because the rhetoric underlying neo-liberal and individualistic discourses now permeates the direction of health policies.   Increasing levels of surveillance, both at bureaucratic and individual levels, also attests to the influence of neo-liberalism and individualism.    This study exposes the tensions between the rhetoric of self-responsibility and the lived experiences of patients and health practitioners, which in many cases is more collective in its focus than is initially apparent.

text: Healing Pluralism and Responsibility: An Anthropological Study of Patient and Practitioner Beliefs Combining the use of alternative and complementary therapies and orthodox medicine is an increasing phenomenon.  This thesis examines the implications of mixing and matching plural healing modalities against a backdrop of patient and practitioner responsibilities.   

From an anthropological perspective, the predominant use of qualitative methodology is an integral part of this research project.  Central to this study is the views of a variety of participant categories - patients who use both alternative and orthodox healing methods; non-medical alternative and complementary practitioners; medical doctors who integrate orthodox and CAM therapies into their daily practise; and orthodox general practitioners.  Interviews with these participants took place over an eighteen-month timeframe and involved face-to-face interviews, telephone interviews, and focus group research.   Social constructionist theory, which forms part of the compendium of interpretive theoretical approaches adopted under the medical anthropology paradigm, has been used in order to expose the beliefs patients and practitioners hold about their own responsibilities, and those of the other participant categories.

This study reveals a palimpsest of complex, contradictory and competing discourses in relation to patient and practitioner expectations and responsibilities.  One important finding relates to the significance of neo-liberal and individualistic ideologies. This thesis concludes that the rhetoric from complementary and alternative practitioners, and their integrative colleagues, is heavily imbued with ideas about self-responsibility, particularly in relation to patient lifestyle choices and therapeutic compliance.   Patients and orthodox general practitioners share some of these views but in general adopt a more collective approach to health care responsibilities.  While patients are prepared to accept some responsibility for their illnesses and health keeping practises, they express strong reliance towards the orthodox health model as well as those doctors who practise integrative medicine.   However the same cannot be said of their attitudes towards CAM modalities where considerable ambivalence is evident towards both practitioners and the therapies themselves.   

The role of the state, and its responsibilities for the structure of the health care system in New Zealand, is also clearly influential in the construction of belief systems.  This is especially so because the rhetoric underlying neo-liberal and individualistic discourses now permeates the direction of health policies.   Increasing levels of surveillance, both at bureaucratic and individual levels, also attests to the influence of neo-liberalism and individualism.    This study exposes the tensions between the rhetoric of self-responsibility and the lived experiences of patients and health practitioners, which in many cases is more collective in its focus than is initially apparent.

year: 2006

title: Critical reflection for researcher–community partnership effectiveness: The He Pikinga Waiora process evaluation tool guiding the implementation of chronic condition interventions in Indigenous communities

authors: Rarere, Moana

subjects: community health planning

abstract: Critically reflecting on researcher–community partnerships is a key component in implementing chronic condition interventions in Indigenous communities. This paper draws on the results and learnings from a process evaluation that measures how well two research–community partnerships have followed the He Pikinga Waiora (HPW) Implementation Framework while co-designing chronic condition interventions in primary care. The HPW framework is centred on Indigenous self-determination and knowledge surrounded by community engagement, cultural centredness, systems thinking and integrated knowledge translation. The evaluation included in-depth interviews and online surveys with 10 team members. The findings demonstrate that the HPW framework was followed well, with strengths particularly in community engagement and relationship building. Areas for improvement included systems thinking and integrated knowledge translation to support sustainability of the interventions. The need for partnerships to use process evaluation results to support critical reflection is asserted, which helps build strong trust and synergy, power sharing and effective and sustainable implementation practices. It is concluded that the HPW framework is well suited to evaluating implementation of health interventions in primary care as it assists in the facilitation of better collaboration between researchers and Indigenous communities, and encourages the implementation team to reflect on power and privilege.

text: Critical reflection for researcher–community partnership effectiveness: The He Pikinga Waiora process evaluation tool guiding the implementation of chronic condition interventions in Indigenous communities Critically reflecting on researcher–community partnerships is a key component in implementing chronic condition interventions in Indigenous communities. This paper draws on the results and learnings from a process evaluation that measures how well two research–community partnerships have followed the He Pikinga Waiora (HPW) Implementation Framework while co-designing chronic condition interventions in primary care. The HPW framework is centred on Indigenous self-determination and knowledge surrounded by community engagement, cultural centredness, systems thinking and integrated knowledge translation. The evaluation included in-depth interviews and online surveys with 10 team members. The findings demonstrate that the HPW framework was followed well, with strengths particularly in community engagement and relationship building. Areas for improvement included systems thinking and integrated knowledge translation to support sustainability of the interventions. The need for partnerships to use process evaluation results to support critical reflection is asserted, which helps build strong trust and synergy, power sharing and effective and sustainable implementation practices. It is concluded that the HPW framework is well suited to evaluating implementation of health interventions in primary care as it assists in the facilitation of better collaboration between researchers and Indigenous communities, and encourages the implementation team to reflect on power and privilege.

year: 2019