430 results for Conference poster

  • Acoustic and perceptual evaluation of the quality of radio-transmitted speech

    Kirtikar, S.; Lin, E.; Robb, M.P. (2011)

    Conference poster
    University of Canterbury Library

    When speech signals are transmitted via radio, the process of transmission may add noise to the signal of interest (Biddulph, 1994; Coleman, 2004). This study aims to examine the effect of radio transmission on the quality of speech signals transmitted using a combined acoustic and perceptual approach.

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  • Breath Ammonia Reduction Ratio (ARR) Measures Dialysis Efficacy

    Endre, Z.; Moorhead, K.; Storer, M.; Hu, W-P.; Dean, J.; Logan, K.; Allardyce, R.; Ledingham, K.; McGregor, D.; Senthilmohan, S.; Lee, D.; Scotter, J.; Chase, J.G. (2007)

    Conference poster
    University of Canterbury Library

    Contemporary evidence supports the centuries old notion that expired breath and the headspaces above body fluids and products can serve as biomarkers of organ function. Clinical responsiveness to alterations in clinical status or therapy is dependent upon timely, accurate, relevant physiological data. Current measures of urea and creatinine to assess renal urea reduction are invasive and cannot be repeated frequently or reported quickly enough to define individual response to treatment in real time. In contrast, breath analysis is minimally invasive and can provide real time information about low molecular weight volatile organic compounds (VOCs) such as ammonia1,2.

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  • Strong ground motions observed in the 22 February 2011 Christchurch earthquake

    Bradley, B.A.; Cubrinovski, M. (2011)

    Conference poster
    University of Canterbury Library

    Poster listed as B-055

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  • New Zealand intermodal freight network and the potential for mode shifting

    Asuncion, J.; Rendall, S.; Murray, R.; Krumdieck, S. (2012)

    Conference poster
    University of Canterbury Library

    Intermodal freight transport is a system of interconnected networks involving various modes and facilities allowing transfer of commodities from one mode to another. The system aims to provide efficient, seamless transport of goods from the origin to its destination offering producers and manufacturers a full range of transportation modes and routing options. In this paper, we review the different modes of freight transportation in New Zealand as well as the current trends of mode share. A GIS-based optimisation model is created integrating road, rail and shipping network called the New Zealand Intermodal Freight Network (NZIFN). The resulting model uses deterrence parameters such as operational costs and time-of-delivery as well as energy consumption and emissions, evaluates trade-offs, and finds the most optimal route from a given origin to a destination. The model is applied to hypothetical scenarios of distribution from Auckland to Wellington and Auckland to Christchurch which demonstrates how freight mode

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  • Investigating common trends in New Zealand cycling fatalities

    Koorey, Glen (2012)

    Conference poster
    University of Canterbury Library

    Following the death of five cyclists in New Zealand during November 2010, The Chief Coroner announced a national Inquest to try and identify any common trends or information that could prevent a re-occurrence of such tragedies. However there was concern that the Inquest scope was of limited value without reference to a much larger sample of crashes. To help inform this Inquest, a larger investigation into NZ cycling fatalities dating back to 2006 was undertaken. The aim was to try to identify any consistent patterns in crash occurrences that were significantly over-represented. All cycling fatalities in NZ since January 2006 were identified from crash records and media reports; 75 fatalities were identified through to March 2012. Review of the relevant Police and media reports identified common attributes. Potential initiatives that could have prevented each fatality were also considered. Some notable trends were found. Older cyclists (>50 years) are very over-represented, despite their relatively low cycling involvement, and also more likely to be at fault. Fatalities involving heavy vehicles and/or state highways were also higher than expected. Poor observation by drivers was very common. The study also identified inconsistencies in crash information recorded, including recording of non-motor vehicle crashes and clothing/helmets worn. The study has provided valuable information to inform both the Inquest and transport safety agencies in general about what is needed to reduce the cycling road toll. It identifies additional trends that are not evident from just examining cycle injury crashes.

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  • An Ultra-Cheap Grid Connected Inverter for Small Scale Grid Connection

    Ghimire, P.; Wood, A.R. (2008)

    Conference poster
    University of Canterbury Library

    This paper reports on the development of a cheap and simple grid connected inverters. It is intended for an integration of a small power photo-voltaic or wind turbine to a grid at low cost. The proposed inverter uses the single cycle control technique, which reduces switching complexity and forces the current waveform to match the voltage waveform. The control circuit operation for unity power factor output is explained. The method is simulated on PSCAD program for single phase system. The simulation output exhibits excellent performance with few components. The paper only considers the current wave-shaping control of the inverters and does not discuss other aspects of control such as maximum power point tracking. The simulations are compared with the prototype waveforms.

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  • Seismic sustainability assessment of structural systems: A preliminary case study

    Yeow, T.; MacRae, G.A.; Dhakal, R.P.; Bradley, B.A. (2012)

    Conference poster
    University of Canterbury Library

    The University of Canterbury has initialized a research program focusing on the seismic sustainability of structures. As part of this program, the relative seismic sustainability of various structures will be assessed to identify those with the highest sustainability for the Christchurch rebuild and general use in New Zealand. This preliminary case study assesses one reinforced concrete (RC) frame structure and one RC wall structure. The scenario loss is evaluated for two earthquake records considering direct losses only in order to explain and illustrate the methodology.

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  • Estimating Uncertainty in Wildlife Population Estimates

    Brown, J.A.; McDonald, L.; Robinson, T. (2008)

    Conference poster
    University of Canterbury Library

    Estimating an index of animal population size from simple counts can be very challenging. If indices are to be compared among years to assess trend there must be some consistency in what fraction of the population the index is measuring. Variation in population indices among years may be due to variation in the size of the population but it may also be due to variation in counting procedure, in animal detection and, for migratory and foraging animals, in the proportion of the total population available to be counted. We discuss two case-studies of animal counts where we attempt to quantify this extra variation, or uncertainty, using Monte Carlo simulation. In the first case-study we assess uncertainty in penguin population indices from counts, and in the second, we assess uncertainty in migratory bird counts from braided rivers in New Zealand.

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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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  • Perception of music for adult cochlear implant users: A questionnaire

    Looi, V.; She, J. (2007)

    Conference poster
    University of Canterbury Library

    Postlingually deafened adult cochlear implant (CI) users often find music to be less pleasant and less enjoyable postimplantation, and a music training program may help to enhance their appreciation of music. However existing studies do not provide detailed information from CI users on the factors which they feel contribute to their poorer ratings for music, nor do they investigate the approach a music training program should take. The purpose of this study was to develop and administer a questionnaire that collects unique information which would assist in the development of a training program aimed at improving CI users’ music perception and appreciation.

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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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  • Environmental Sound Perception of Cochlear Implant Users

    Looi, V.; Arnephy, J.; O'Beirne, G.A. (2007)

    Conference poster
    University of Canterbury Library

    Introduction Most current adult cochlear implant (CI) users achieve higher open-set speech perception scores post- surgery than pre- surgery, a factor which greatly improves their overall quality of life. There is little published research assessing the ability of CI users to identify environmental sounds, an important skill which also impacts upon a patient’s quality of life. This study compared adult CI users to normally hearing (NH) listeners in their ability to identify various environmental sounds. The Environmental Sounds Perception Test (ESPT) developed for this study was more difficult and more comprehensive than those used in current studies, in order to reduce the likelihood of any potential ceiling effect affecting the results. It was hypothesised that the CI users would score lower than similarly-aged NH listeners on the ESPT.

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  • The South Island Velocity Model (SIVM) - Version 1: Computational implementation and Integration within the Unified Community Velocity Model (UCVM) framework

    Thomson, Ethan; Bradley, Brendon; Lee, Robin L. (2016)

    Conference poster
    University of Canterbury Library

    This poster presents the computational implementation of the South Island Velocity Model (SIVM) Version 1, constructed for use in physics-based ground motion simulation. A planned integration of the SIVM within the Unified Community Velocity Model (UCVM) framework is presented which will allow researchers to generate velocity models for use in ground motion simulations using standardized approaches. The SIVM allows any fault rupture located in the South Island to be simulated. Figure 4 illustrates the results of ground motion simulations for three rupture scenarios of the Alpine Fault.

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  • Volcanic Impacts Study Group: Working with utility infrastructure organisations to improve understanding of volcanic ash impacts

    Daly, M.; Johnston, D.; Jolly, G.; Wilson, T.M.; Stewart, C.; Cronin, S.; Lindsay, J.; Smith, I.; Halliwell, P.; Holland, G.; Cowan, H. (2012)

    Conference poster
    University of Canterbury Library

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  • More Sketchy, More AR, More Fun!

    Haller, M.; Landerl, F.; Billinghurst, M. (2005)

    Conference poster
    University of Canterbury Library

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  • ComposAR: An Intuitive Tool for Authoring AR Applications

    Seichter, H.; Looser, J.; Billinghurst, M. (2008)

    Conference poster
    University of Canterbury Library

    This paper introduces ComposAR, a tool to allow a wide audience to author AR and MR applications. It is unique in that it supports both visual programming and interpretive scripting, and an immediate mode for runtime testing. ComposAR is written in Python which means the user interface and runtime behavior can be easily customized and third-party modules can be incorporated into the authoring environment. We describe the design philosophy and the resulting user interface, lessons learned and directions for future research.

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  • Nitrogen dioxide exposure inside and outside of primary schools

    Holland, K.; Kingham, S. (2008)

    Conference poster
    University of Canterbury Library

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  • Augmented Assembly using a Mobile Phone

    Hakkarainen, M.; Billinghurst, M.; Woodward, C. (2008)

    Conference poster
    University of Canterbury Library

    We present a mobile phone based augmented reality (AR) assembly system that enable users to view complex models on their mobile phones. It is based on a client-server architecture, where complex model information is located on a PC, and a mobile phone with the camera is used as a thin client access device to this information. With this system users are able to see an AR view that provides step by step guidance for a real world assembly task. We also present results from a pilot user study evaluating the system, showing that people felt the interface was intuitive and very helpful in supporting the assembly task.

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