Now showing items 1-20 of 89

    • Towards a brain-controlled Wheelchair Prototype 

      Yazdani, Naisan; Khazab, Fatemah; Fitzgibbon, Sean Patrick; Luerssen, Martin Holger; Powers, David Martin; Clark, Christopher Richard (BCS, 2010)
      In this project, a design for a non-invasive, EEG-based braincontrolled wheelchair has been developed for use by completely paralyzed patients. The proposed design includes a novel approach for selecting optimal electrode ...
    • Multiplying the Mileage of Your Dataset with Subwindowing 

      Atyabi, Adham; Fitzgibbon, Sean Patrick; Powers, David Martin (Springer Berlin Heidelberg, 2011)
      This study is focused on improving the classification performance of EEG data through the use of some data restructuring methods. In this study, the impact of having more training instances/samples vs. using shorter window ...
    • Evaluation: from Precision, Recall and F-measure to ROC, Informedness, Markedness and Correlation 

      Powers, David Martin (Bioinfo Publications, 2011-12-15)
      Commonly used evaluation measures including Recall, Precision, F-Measure and Rand Accuracy are biased and should not be used without clear understanding of the biases, and corresponding identification of chance or base ...
    • Multiplication of EEG Samples through Replicating, Biasing, and Overlapping 

      Atyabi, Adham; Fitzgibbon, Sean Patrick; Powers, David Martin (Springer Berlin Heidelberg, 2012)
      EEG recording is a time consuming operation during which the subject is expected to stay still for a long time performing tasks. It is reasonable to expect some uctuation in the level of focus toward the performed task ...
    • The problem with Kappa 

      Powers, David Martin (Association for Computational Linguistics, 2012-04)
      It is becoming clear that traditional evaluation measures used in Computational Linguistics (including Error Rates, Accuracy, Recall, Precision and F-measure) are of limited value for unbiased evaluation of systems, and ...
    • The Popular Memory Archive: collecting and exhibiting player culture from the 1980s 

      Stuckey, Helen; Swalwell, Melanie Lorraine; Ndalianis, Angela (Springer-Verlag Berlin Heidelberg, 2013)
      This book constitutes the refereed post-proceedings of the IFIP WG 9.7 International Conference on the History of Computing, HC 2013, held in London, UK, in June 2013. The 29 revised full papers presented were carefully ...
    • Remembrance of games past: the Popular Memory Archive 

      Stuckey, Helen; Swalwell, Melanie Lorraine; Ndalianis, Angela; de Vries, Denise Bernadette (ACM Digital Library, 2013)
      Games are one of the most significant cultural forms of our times and yet they are poorly documented in Australia and New Zealand. Knowledge about the history of games is overwhelmingly held by private collectors and fans, ...
    • Collecting and conserving code: challenges and strategies 

      Swalwell, Melanie Lorraine; de Vries, Denise Bernadette (Department of Media, Music, Communication and Cultural Studies, Macquarie University, Sydney, 2013)
      The collection and conservation of code is still in its infancy in Australia. Even where coded items do exist, they are almost completely invisible within local cultural institutions and archives. Born-digital heritage ...
    • Miocene mystacinids (Chiroptera: Noctilionoidea) indicate a long history for endemic bats in New Zealand 

      Hand, S; Worthy, Trevor; Archer, M; Worthy, J; Tennyson, A; Schofield, R (Society of Vertebrate Paleontology, 2013)
    • An online means of testing asymmetries in seating preference reveals a bias for airplanes and theatres 

      Nicholls, Michael Elmo Richard; Thomas, Nicole A; Loetscher, Tobias (SAGE, 2013)
    • Moving on from the original experience: games history, preservation and presentation 

      Swalwell, Melanie Lorraine (Digital Games Research Association, 2013)
      The art historical notion of ‘the original’ continues to inflect games history and game preservation work. This paper notes the persistence of this concept particularly in the game lover’s invocation of ‘the original ...
    • The Popular Memory Archive 

      de Vries, Denise Bernadette; Ndalianis, Angela; Stuckey, Helen; Swalwell, Melanie Lorraine (Flinders University, Department of Screen and Media, 2013)
      Digital games make up a significant but little known chapter in the history of the moving image in Australia and New Zealand. This site aims to exhibit some of the significant local games of the 1980s era, and collect ...
    • A bittern (Aves: Ardeidae) from the Early Miocene of New Zealand 

      Worthy, Trevor; Worthy, Jennifer P; Tennyson, Alan J D; Scofield, R Paul (Springer Verlag, 2013)
    • Miocene fossils show that kiwi (Apteryx, Apterygidae) are probably not phyletic dwarves 

      Worthy, Trevor; Worthy, Jennifer P; Tennyson, Alan J D; Salisbury, Steven W; Hand, Suzanne J; Scofield, R Paul (Verlag Naturhistorisches Museum Wien, 2013)
      Until now, kiwi (Apteryx, Apterygidae) have had no pre-Quaternary fossil record to inform on the timing of their arrival in New Zealand or on their inter-ratite relationships. Here we describe two fossils in a new genus ...
    • Early Miocene fossil frogs (Anura: Leiopelmatidae) from New Zealand. 

      Worthy, Trevor; Tennyson, Alan J D; Scofield, R Paul; Hand, Suzanne J (Taylor & Francis, 2013)
      The first pre-Quaternary anurans from New Zealand are reported from the Early Miocene (19–16 Ma) St Bathans Fauna based on 10 fossil bones. Four bones representing two new species differing in size are described in Leiopelma: ...
    • Surface Laplacian of Central Scalp Electrical Signals is Insensitive to Muscle Contamination 

      Fitzgibbon, Sean Patrick; Lewis, Trent Wilson; Powers, David Martin; Whitham, Emma Mary; Willoughby, John Osborne; Pope, Kennith (IEEE - Institute of Electrical and Electronics, 2013-01)
      Abstract—Objective: To investigate the effects of surface Laplacian processing on gross and persistent electromyographic (EMG) contamination of electroencephalographic (EEG) signals in electrical scalp recordings. Methods: ...
    • A computationally and cognitively plausible model of supervised and unsupervised learning 

      Powers, David Martin (Springer-Verlag, 2013-01-01)
      The issue of chance correction has been discussed for many decades in the context of statistics, psychology and machine learning, with multiple measures being shown to have desirable properties, including various definitions ...
    • The interplay between structure and agency in shaping the mental health consequences of job loss 

      Anaf, Julia Margaret; Baum, Fran; Newman, Lareen Ann; Ziersch, Anna Marie; Jolley, Gwyneth Margaret (BioMed Central Ltd., 2013-02-06)
      Main themes that emerged from the qualitative exploration of the psychological distress of job loss included stress, changes to perceived control, loss of self-esteem, shame and loss of status, experiencing a grieving ...
    • The nature and correlates of self-esteem trajectories in late life 

      Wagner, Jenny; Gerstorf, Denis; Hoppmann, Christiane A; Luszcz, Mary Alice (American Psychology Association, 2013-07)
      Is it possible to maintain a positive perspective on the self into very old age? Empirical research so far is rather inconclusive, with some studies reporting substantial declines in self-esteem late in life, whereas others ...
    • On sets of occupational measures generated by a deterministic control system on an infinite time horizon 

      Gaitsgory, Vladimir; Quincampoix, Marc (Elsevier, 2013-09)
      We give a representation for the closed convex hull of the set of discounted occupational measures generated by control-state trajectories of a deterministic control system. We also investigate the limit behavior of the ...