The roles of static depth information and object-image relative motion in perception of heading

In a series of 6 experiments, two hypotheses were tested: that nominal heading perception is determined by the relative motion of images of objects positioned at different depths (R. F. Wang & J. E. Cutting 1999) and that static depth information contributes to this determination. By manipulating static depth information while holding retinal-image motion constant during  simulated self-movement, the authors found that static depth information played a role in determining perceived heading. Some support was also found for the involvement of R. F. Wang and J. E. Cutting’s (1999) categories of object-image relative motion in determining perceived heading. However, results suggested an unexpected functional dominance of information about heading relative to apparently near objects.

The role of local grouping and global orientation contrast in perception of orientation-modulated textures

We explored the contribution to perception of orientation-modulated textures of visual processes selective either for orientation contrast or orientation grouping. To distinguish between these two processes we manipulated the axis of local grouping of texture elements independently of the direction of global orientation modulation. The general question posed was whether visibility of texture structure (measured as threshold for discriminating spatial-frequency of texture structure) is dependent on the magnitude of orientation contrast, strength and direction of local grouping, or some combination of the two. We demonstrated that the factor of primary importance is the amplitude of global orientation contrast rather than the presence of local grouping content. Using orientation-interleaved textures (containing two superimposed textures modulated around orthogonal orientations), we further showed that orientation single-opponent processes are a more likely candidate for detecting orientation contrast than double-opponent processes.

Finding and filling the gaps in the Australian governments' innovation and entrepreneurship support spectra

A national innovation system is concerned with the full process of converting new knowledge into commercially viable results. Governments are policy-active in trying to create productive national innovation systems. This paper reviews ways of thinking about entrepreneurship as the commercialisation component of Australia’s innovation system. The paper explores the impact and relevance of selected existing Australian Commonwealth, and to a lesser extent State government, programs for the commercialisation channels so identified, using four frameworks for the analysis: financial, management/start-up, innovation and entrepreneurial. The analysis indicates program initiatives covering the later development and commercialization phases, but serious gaps in the support available for the entrepreneurship phase involving the act of new entry. This gap is covered by research provider business development people and to a limited extent by incubator and State government initiatives. A critical issue has been and is access to smaller amounts of seed finance. The critical human component is the education of public servants and politicians about the nature and operation of entrepreneurship.

International postgraduate students experience in a UK university : lessons for academic practice

This paper reports on a study of the international postgraduate student experience in a United Kingdom (UK) university, using a case study approach. Looking at both the academic and non academic experience of students in the university, the paper attempts to identify differences in perceptions of staff and students on key issues related to the international student experience. The limited sample of this study is compensated for by the quality and depth of data obtained from in-depth interviews with students and staff in one UK university. Results indicate significant convergence of perceptions in relation to the quality of education in the UK though the issues of cultural integration, English language and inadequate student support and the serious threat these issues pose to the quality of experience for students. The paper identifies five key gaps in the way staff and students conceptualise the postgraduate student experience and concludes with suggestions for how management might narrow these gaps in the higher education context.

Identifying crucial gaps in our knowledge of the life-history of avian influenza viruses - An Australian perspective

We review our current knowledge of the epidemiology and ecology of avian influenza viruses (AIVs) in Australia in relation to the ecology of their hosts. Understanding the transmission and maintenance of low-pathogenic avian influenza (LPAI) viruses deserves scientific scrutiny because some of these may evolve to a high-pathogenic AIV (HPAI) phenotype. That the HPAI H5N1 has not been detected in Australia is thought to be a result of the low level of migratory connectivity between Asia and Australia. Some AIV strains are endemic to Australia, with Australian birds acting as a reservoir for these viruses. However, given the phylogenetic relationships between Australian and Eurasian strains, both avian migrants and resident birds within the continent must play a role in the ecology and epidemiology of AIVs in Australia. The extent to which individual variation in susceptibility to infection, previous infections, and behavioural changes in response to infection determine AIV epidemiology is little understood. Prevalence of AIVs among Australian avifauna is apparently low but, given their specific ecology and Australian conditions, prevalence may be higher in little-researched species and under specific environmental conditions.

Are there news gaps in rural/regional Australia? Researching media plurality beyond Finkelstein

Rural/regional news is emerging as a vital area of media policy and research throughout the world as industry bodies, governments and academics grapple with debates concerning the future of news in a complex digital world. However, there has been little examination of media plurality at the rural/regional level, or research into the sustainability of the sector in Australia. Such concerns go to questions of what roles industry and government might play in ensuring its future. The Finkelstein report in 2012 noted that many rural/regional newspapers in Australia had limited resources and consequently low capacity for in-depth coverage of local issues. In the meantime, the funding model of the Australian Broadcasting Corporation (which services rural/regional areas as part of its charter) has come under intense scrutiny by the federal Liberal-National Party coalition government. Signs from abroad – especially from the United Kingdom – are troubling. Several independent inquiries have called for policy initiatives to address what British scholars describe as the growing “democratic deficit” created by the closure of hundreds of local UK newspapers since 2004. This paper canvasses current and emerging media policy settings in the UK, the United States and Australia before posing some broader questions on the future of rural/regional news in Australia.

Using Spatiotemporal Methods to Fill Gaps In Energy Usage Interval Data

Researchers analyzing spatiotemporal or panel data, which varies both in location and over time, often find that their data has holes or gaps. This thesis explores alternative methods for filling those gaps and also suggests a set of techniques for evaluating those gap-filling methods to determine which works best.

A transcript finishing initiative for closing gaps in the human transcriptome

We report the results of a transcript finishing initiative, undertaken for the purpose of identifying and characterizing novel human transcripts, in which RT-PCR was used to bridge gaps between paired EST Clusters, mapped against the genomic sequence. Each pair of EST Clusters selected for experimental validation was designated a transcript finishing unit (TFU). A total of 489 TFUs were selected for validation, and an overall efficiency of 43.1% was achieved. We generated a total of 59,975 bp of transcribed sequences organized into 432 exons, contributing to the definition of the structure of 211 human transcripts. The structure of several transcripts reported here was confirmed during the course of this project, through the generation of their corresponding full-length cDNA sequences. Nevertheless, for 21% of the validated TFUs, a full-length cDNA sequence is not yet available in public databases, and the structure of 69.2% of these TFUs was not correctly predicted by computer programs. The TF strategy provides a significant contribution to the definition of the complete catalog of human genes and transcripts, because it appears to be particularly useful for identification of low abundance transcripts expressed in a restricted Set of tissues as well as for the delineation of gene boundaries and alternatively spliced isoforms.

Survival probability of large rapidity gaps in a QCD model with a dynamical infrared mass scale

We compute the survival probability {vertical bar S vertical bar(2)} of large rapidity gaps (LRG) in a QCD based eikonal model with a dynamical gluon mass, where this dynamical infrared mass scale represents the onset of nonperturbative contributions to the diffractive hadron-hadron scattering. Since rapidity gaps can occur in the case of Higgs boson production via fusion of electroweak bosons, we focus on WW -> H fusion processes and show that the resulting {vertical bar S vertical bar(2)} decreases with the increase of the energy of the incoming hadrons; in line with the available experimental data for LRG. We obtain {vertical bar S vertical bar(2)} = 27.6 +/- 7.8% (18.2 +/- 17.0%) at Tevatron (CERN-LHC) energy for a dynamical gluon mass m(g) = 400 MeV. (c) 2006 Elsevier B.V. All rights reserved.

Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at root s=7 TeV

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)