39 results for Conference poster, 2009

  • A 2 parameter model of lung mechanics to predict volume response and optimise ventilator therapy in ARDS

    Sundaresan, A.; Hann, C.E.; Chase, J.G.; Yuta, T.; Shaw, G.M. (2009)

    Conference poster
    University of Canterbury Library

    A majority of patients admitted to the Intensive Care Unit (ICU) require some form of respiratory support. In the case of Acute Respiratory Distress Syndrome (ARDS), the patient often requires full intervention from a mechanical ventilator. ARDS is also associated with mortality rates as high as 70%. Despite many recent studies on ventilator treatment of the disease, there are no well established methods to determine the optimal Positive End expiratory Pressure (PEEP) ventilator setting for individual patients [1]. A model of fundamental lung mechanics is developed based on capturing the recruitment status of lung units. The model produces good correlation with clinical data, and is clinically applicable due to the minimal number of patient specific parameters to identify. The ability to use this identified patient specific model to optimize ventilator management and lung volume recruitment is demonstrated. It thus provides a platform for continuous monitoring of lung unit recruitment and capability for a patient.

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  • The application of system dynamics in power generation planning

    Jalal, T.S.; Bodger, P. (2009)

    Conference poster
    University of Canterbury Library

    Background & Introduction: The introduction of power markets in the electric supply industries (ESI) has called for a different approach to system planning and expansion. The traditional monopolistic vertically integrated system has been replaced by competing companies in the generation and retail sectors. Some of the effects on the generation planning process are: Uncertainties are increased since a department that coordinates a national planning ceases to exist Companies are no longer obligated to have generation surplus as the ESI become profit oriented Limited information is disclosed by competing companies, creating imperfect foresight on investments Non-technical factors such as market conditions, economics and social aspects are becoming more significant in building new power plants Based on these impacts, it is difficult for the power generators to decide when to invest in new power plants. Each country has its own unique environment that makes it difficult to simply adopt measures done in other countries. Hence, this study proposes to study the impact of deregulation on power generation capacity growth in New Zealand investigate suitable national policies that will ensure the reliability of the industry

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  • Rescuing concatenation with maximum likelihood using supermatrix rooted triples

    DeGiorgio, M.; Degnan, J.H. (2009)

    Conference poster
    University of Canterbury Library

    Concatenated alignments are often used to infer species-level reslationships. Previous studies have shown that analysis of concatenated alignments using maximum likelihood (ML) can produce misleading results. We develop a polynomial-time method that constructs a species tree through inferred rooted triples from concatenated alignments. We call this method SuperMatrix Rooted Triple (SMRT). We show that SMRT performs well in simulations and then show that it is a statistically consistent estimator of a clocklike species tree under a binary substitution model as well as other assumptions. SMRT is therefore a computationally efficient and statistically consistent estimator of species trees.

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  • Improving the Calculation of Fix-Rate Bias in Automated Telemetry Systems

    Brown, J.A.; Reale, M.; Hodge, M. (2009)

    Conference poster
    University of Canterbury Library

    GPS and other radio tracking equipment are becoming more widely used by researchers for modelling animal habitat. In a typical monitoring program an animal will be fitted with a tracking collar. This tracking collar will fix the animal's location at a set time interval. These fixes of the animal's location can then be cross referenced on a digital map (GIS) containing habitat information and the animal's preferred habitat can be modelled. Care must be used in modelling the habitat because radio tracking collars have different transmission probabilities in different habitats. The habitat observations are biased towards habitats that allow good transmission. One way to minimise this bias is to weight observations by a measure of transmission quality. Researchers have attempted to estimate the detection weighting by placing stationary collars in the study area and recording the fix-rate. The results of these studies are unsatisfactory because stationary collars do not account for animal movement and behaviour. Johnson (1998) used a surrogate for stationary collars by analysing 6 hour time periods where the animal was relatively stationary. We will develop this method further by incorporating the non-stationary sites in the detection rate calculation.

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  • Development of a monosyllabic adaptive speech test for the identification of central auditory processing disorder

    O'Beirne, G.A.; McGaffin, A.J. (2009)

    Conference poster
    University of Canterbury Library

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  • Clinical and economic predictors of quality of life in dementia

    Gallrach, F.; Kirk, R.; Hornblow, A.; Croucher, M. (2009)

    Conference poster
    University of Canterbury Library

    • To date, multivariate analyses of quality of life (QoL) in dementia are relatively rare (Banerjee et.al_2009). This study aimed to measure QoL of persons with dementia and their family-caregivers. • The study also examined what interventions from primary and secondary care in New Zealand are helpful for enhancing QoL and what these interventions cost.

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  • Impacts of transport: encouraging potential cyclists

    Taylor, K.; Kingham, S.; Koorey, Glen (2009)

    Conference poster
    University of Canterbury Library

    This poster presents research on impacts of sustainable transport, particularly encouraging commuter cycling. The study focused on issues perceived by potential commuter cyclists, a group underrepresented in transport research.

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  • Model-based therapeutics for the Cardiovascular System - a Clinical Focus

    Hann, C.E.; Chase, J.G.; Desaive, T.; Lambermont, B.; Ghuysen, A.; Kolh, P.; Shaw, G.M. (2009)

    Conference poster
    University of Canterbury Library

    6-pages (invited)

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  • Effect of Porous Paving on Tree Growth

    Morgenroth, J. (2009)

    Conference poster
    University of Canterbury Library

    Porous paving has increasingly been installed in urban areas as a stormwater management strategy. Unlike standard impervious pavements, porous alternatives are permeable to air and water. Intuitively, this should provide a more hospitable growing environment for urban trees. This research provides insights into the interacting effects of pavement porosity and construction technique on street tree growth.

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  • CVD Diamond X-ray Detectors for Radiotherapy Dosimetry

    Lansley, S.P.; Betzel, G.T.; Baluti, F.; Reinisch, L.; Meyer, J. (2009)

    Conference poster
    University of Canterbury Library

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  • Effect of noise upon the perception of speech intelligibility in dysarthria

    McAuliffe, M.J.; Schaefer, M.; O'Beirne, G.A.; LaPointe, L.L. (2009)

    Conference poster
    University of Canterbury Library

    Is the intelligibility of dysarthric speech, at word and phrase-level, affected similarly to normal speech when presented in noise? It is hypothesised that dysarthric speech will show greater declines in intelligibility with increased noise than normal speech.

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  • Prototype X-Ray Detectors Based on CVD Diamond

    Lansley, S.P.; Betzel, G.T.; Baluti, F.; Reinisch, L.; Meyer, J. (2009)

    Conference poster
    University of Canterbury Library

    X-ray detectors have been fabricated from a range of commercially-available chemical vapour deposition (CVD) diamond. They have been packaged and tested in a clinical environment, using clinical apparatus and following clinical procedures: 6 MV linear accelerator, solid water phantom, dosimeter. Some devices exhibited highly desirable characteristics, such as negligible dark currents (sub-pA), low priming doses (few Gy) and high specific sensitivities (up to 586 nC Gy-1 mm-3), demonstrating the potential of these devices as simple-to-use, small size, tissue-equivalent, sensitive x-ray dosimeters. The performance of such devices in clinical applications, such as beam profiling (both depth and off-axis) is currently in progress.

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  • Syntactic priming can drive syntactic change

    Katseff, S.; Hahn, P.R.; Gahl, S. (2009)

    Conference poster
    University of Canterbury Library

    Syntactic priming is the tendency to repeat sentence structures that have recently been used. Syntactic priming reduces speech latency, allowing speech to start more quickly and proceed more smoothly.

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  • New model for eddy current calculation and applications for partial core transformers

    Huo, B.; Bodger, P. (2009)

    Conference poster
    University of Canterbury Library

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  • Practice-led curricula: driving from the front or rear seat?

    Adamson, Carole (2009-11-11)

    Conference poster
    The University of Auckland Library

    Do knowledge-driven or practice-led models best serve the needs of social work practitioners engagin

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  • Using neuroanatomical imaging to learn about New Zealand's endemic species

    Corfield, Jeremy; Wild, John; Parsons, Stuart; Kubke, Maria (2009-08)

    Conference poster
    The University of Auckland Library

    Isolated from the world, New Zealand became a place where birds, in the absence of terrestrial mammals, evolved a diverse assortment of shapes, sizes and behaviours.

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  • A Computational Model For Cerebral Circulation And Its Application For Haemodynamic Modelling In Vascular Surgeries

    Ho, Harvey; Mithraratne, K; Hunter, Peter (2009)

    Conference poster
    The University of Auckland Library

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  • A Multiscale, Spatially-Distributed Model of Airway Hyper-Responsiveness

    Donovan, Graham; Politi, Antonio; Sneyd, A; Tawhai, Merryn (2009-05)

    Conference poster
    The University of Auckland Library

    Rationale: Airway hyper???responsiveness (AHR), along with airway hyper???sensitivity, is a defining feature of asthma, and greater understanding of this emergent phenomenon may lead to better insight into and treatment of the condition. We seek a multiscale, spatially???distributed, mathematical model of the lung to help us understand the role of airway smooth muscle and parenchymal material in AHR. Methods: Our model couples together the organ scale with the tissue scale in the lung in a multiscale approach to the problem. At the organ level, parenchymal tissue is modeled as a compressible Blatz???Ko material in three dimensions, with expansion and recoil of lung tissue due to tidal breathing. The governing equations of finite elasticity deformation are solved using a finite element method. An airway tree is embedded in this tissue, with airway smooth muscle behavior described by a modified Hai???Murphy cross???bridge model (Wang et al., Biophys. J. 94:2008). Each airway segment is initially assumed to be radially symmetric and longitudinally stiff, and thus the embedded airway tree is essentially 1D. Results: Our spatially???distributed, multiscale model yields organ???level observations while incorporating tissue???level modeling detail. Preliminary results from the integrated model indicate potential use in the study of many phenomena associated with asthmatic AHR, including spatial distribution of ventilation defects, patchiness, and effects of deep inspirations.

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  • Nano-structural organisation in ionic liquids

    Kathirgamanathan, Kalyani; Al-Hakkak, J; Edmonds, Neil; Easteal, Allan; Grigsby, WJ (2009-12-09)

    Conference poster
    The University of Auckland Library

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  • Factors Influencing the Aroma Stability of New Zealand Sauvignon blanc

    Herbst, M; Nicolau, Laura; Kilmartin, Paul (2009-08)

    Conference poster
    The University of Auckland Library

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