967 resultados para CURVED BOUNDARIES


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This paper engages the constitutive as well as the representative role of metaphor in research. Metaphors are understood to provide possibilities for representations and conceptualisations. The use of metaphorical redescription permits us to 'use familiar words in unfamiliar ways' (Rorty, 1989, p. 18) and provides new language that deters the use of repeated ways of knowing. It invites us to see things differently and to act differently. Lakoff and Johnson (1980) argue that metaphor does more than represent: 'New metaphors have the power to construct a new reality' (p. 145). I have drawn on both these understandings of metaphor. In qualitative research, metaphorical analysis has a well-established history. Researchers analyse metaphors used by research participants and apply metaphors to participant actions and understandings (Koro-Ljungberg, 2001; Gregory & Noblit, 1998). Researchers also use metaphors to reflect or represent their methodological decision-making (Richardson, 2003; Gadamer, 1989). In this article, I have nudged the conceptual boundaries of methodology. I have argued the constructive nature of metaphor in methodological positioning and decision making. I use the writing of a doctoral thesis to argue this role of metaphor. There, the metaphor of hair braiding constructed and communicated my methodological decision-making and my researcher stance as a braider.

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Theoretical paternalism and the convenience of working within ‘accepted’ frameworks have appropriated the Indigenous subject within the boundaries of colonial relations. The establishment of post-colonial theory as one of the only ‘acceptable’ frameworks for exploring the Indigenous subject has limited the subject’s theoretical development within the binary of coloniser/colonised. Breaking from this tradition, the Foucauldian concepts of governmentality, ethics and care-ofthe-self will be used as a template for expansion. This paper will explore the passages of the Indigenous subject in theoretical development. It will examine the significance of post-colonial and settler colonial theories in the conceptualisation of the subject, and consider the transformations that occur when the borders established by these theories are crossed. The paper will therefore be comprised of four sections. The first will address the value and limitations of post-colonial and settler colonial theory. The second will posit reasons and implications for why theoretical neglect has occurred. The third will present and critique the Foucauldian concepts of governmentality, ethics and care-of-the-self. Applying Foucault’s concepts to examples of Indigenous offenders in the settler societies of Australia and New Zealand, the final section will examine the impact of the Indigenous subject in Western thought and institutional practice.

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In early 2009, researchers in the English Department of the University of Amsterdam collaborated with researchers in the Drama Department, Deakin University, Australia on a project which brought English as a Second Language students from The Netherlands into the rehearsal studio of Australian students engaged in play-building on Australian themes. The project aims were multiple and interconnected. We extended a language acquisition framework established by the Dutch investigators in previous collaborations with the Universities of Venice and Southampton, and combined this with an investigation of ways to harness technology in order to teach Australian students to communicate with and about their art. The Dutch language students were prompted to develop art-related language literacy (description, interpretation, criticism), through live, video-streamed interaction with drama students in Australia at critical points in the development of a group-devised performance (conception, rehearsal, performance). The Australian student improved their capacity to articulate the aims and processes which drove their art-making by illuminating the art-making process for the Dutch students, and providing them with a real-life context for the use of extended vocabulary whilst making them partners in the process of shaping the work. All participants engaged in the common task of assessing the capacity of the art work produced to communicate meaning to a non-Australian audience.

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This thesis explored young children's reporting of non-experienced (false) events. It demonstrated that children can be led to provide convincing reports of plausible and implausible false events within both narrow and broad contextual frameworks. Further, it showed that investigative interviewers utilise questioning techniques that could elicit false-event reports from children.

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This thesis examines a range of recent Australian fiction written in a magical realist mode. It uses the work of Russian literary theorist Mikhail Bakhtin to foreground the cross-cultural dialogues represented in these narratives, and it reads these dialogues in the context of contemporary negotiations of cultural difference in Australia.

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This paper presents the development and experimental analysis of a dielectrophoresis (DEP) system, which is used for the manipulation and separation of microparticles in liquid flow. The system is composed of arrays of microelectrodes integrated to a microchannel. Novel curved microelectrodes are symmetrically placed with respect to the centre of the microchannel with a minimum gap of 40 mm. Computational fluid dynamics method is utilised to characterise the DEP field and predict the dynamics of particles. The performance of the system is assessed with microspheres of 1, 5 and 12 mm diameters. When a high-frequency potential is applied to microelectrodes a spatially varying electric field is induced in the microchannel, which creates the DEP force. Negative-DEP behaviour is observed with particles being repelled from the microelectrodes. The particles of different dimensions experience different DEP forces and thus settle to separate equilibrium zones across the microchannel. Experiments demonstrate the capability of the system as a field flow fraction tool for sorting microparticles according to their dimensions and dielectric properties.

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This article presents the numerical and experimental analysis of a dielectrophoretic-activated cell sorter (DACS), which is equipped with curved microelectrodes. Curved microelectrodes offer unique advantages, since they create strong dielectrophoretic (DEP) forces over the tips and maintain it over a large portion of their structure, as predicted by simulations. The performance of the system is assessed using yeast (Saccharomyces cerevisiae) cells as model organisms. The separation of the live and dead cells is demonstrated at different medium conductivities of 0.001 and 0.14 S/m, and the sorting performance was assessed using a second array of microelectrodes patterned downstream the microchannel. Further, microscopic cell counting analysis reveals that a single pass through the system yields a separating efficiency of ~80% at low medium conductivities and ~85% at high medium conductivities.

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Mismatches in boundaries between natural ecosystems and land governance units often complicate an ecosystem approach to management and conservation. For example, information used to guide management, such as vegetation maps, may not be available or consistent across entire ecosystems. This study was undertaken within a single biogeographic region (the Murray Mallee) spanning three Australian states. Existing vegetation maps could not be used as vegetation classifications differed between states. Our aim was to describe and map ‘tree mallee’ vegetation consistently across a 104 000km2 area of this region. Hierarchical cluster analyses, incorporating floristic data from 713 sites, were employed to identify distinct vegetation types. Neural network classification models were used to map these vegetation types across the region, with additional data from 634 validation sites providing a measure of map accuracy. Four distinct vegetation types were recognised: Triodia Mallee, Heathy Mallee, Chenopod Mallee and Shrubby Mallee. Neural network models predicted the occurrence of three of them with 79% accuracy. Validation results identified that map accuracy was 67% (kappa = 0.42) when using independent data. The framework employed provides a simple approach to describing and mapping vegetation consistently across broad spatial extents. Specific outcomes include: (1) a system of vegetation classification suitable for use across this biogeographic region; (2) a consistent vegetationmapto inform land-use planning and biodiversity management at local and regional scales; and (3) a quantification of map accuracy using independent data. This approach is applicable to other regions facing similar challenges associated with integrating vegetation data across jurisdictional boundaries.