Visual pigments, oil droplets, ocular media and cone photoreceptor distribution in two species of passerine bird: the blue tit (Parus caeruleus L.) and the blackbird (Turdus merula L.)

The spectral absorption characteristics of the retinal photoreceptors of the blue tit (Pal trs caeruleus) and blackbird (Turdus merula) were investigated using microspectrophotometry. The retinae of both species contained rods, double cones and four spectrally distinct types of single cone. Whilst the visual pigments and cone oil droplets in the other receptor types are very similar in both species, the wavelength of maximum sensitivity (lambda(max)) of long-wavelength-sensitive single and double cone visual pigment occurs at a shorter wavelength (557 nm) in the blackbird than in the blue tit (563 nm). Oil droplets located in the long-wavelength-sensitive-single cones of both species cut off wavelengths below 570-573 nm, theoretically shifting cone peak spectral sensitivity some 40 nm towards the long-wavelength end of the spectrum. This raises the possibility that the precise lambda(max) of the long-wavelength-sensitive visual pigment is optimised for the visual function of the double cones. The distribution of cone photoreceptors across the retina, determined using conventional light and fluorescence microscopy also varies between the two species and may reflect differences in their visual ecology.

Mercantilist Cinderella : Deakin University and the distance education student in the postmodern world

This is a thesis presented on the position of the distance education student at a distance education university in the present era. Traditionally, the distance education student has been a sort of Cinderella: marginalised, being constructed as some form of lesser version of the on campus one. A largely invisible part of the higher education system in Australia since 1911, the distance education student has really only come to be foregrounded in university education discourses from 1983 onwards. It was not until then that the distance education student emerged from ‘hidden pools’ identified by Karmel (1975), and since then the construction of this student has undergone a number of modifications, mapped in this thesis. At the same time university education itself has undergone a series of modifications, not least of which has been its taking on mercantilist overtones as investments made by students in their own careers and professional development. The modifications, also mapped in this thesis, have progressed to the stage where the construction of the old distance education student is now one of a flexible learner in a mercantilist system of university education. The notion of distance education and the distance education student has undergone significant shifts, redefinitions and constructions, which are tracked in this thesis. My research has focussed on a number of pertinent questions, based on a study of Deakin University and its practice since its establishment. The thesis draws on a number of works which have been informed by those of Foucault, and I have framed my research questions accordingly. I have asked why and how Deakin University came into being as a distance education provider at tertiary level. What were the conditions of its establishment and progression in relation to the political events, economic practices and communication technology in use over time? To consider such questions, I needed to analyse the changes that I had seen occurring in the context of wider restructurings in university education. These had occurred in the context of government forging a closer interconnectedness between education and national economic aims and objectives at the same time as it demanded greater productivity in the face of commercial and industrial sector pushes for applied knowledge. Poststructuralist philosophical developments offer tools to explore not only questions of power, but the practical outcomes of questions of power, and how the complicity of individuals is established. This thesis explores ways in which such considerations helped to shape the changing constructions of the distance education student from a marginalised, disadvantaged and under-represented participant in higher education to a privileged, well catered for and advantaged learner. These same considerations are used to explore ways in which they have helped to shape university distance education courses from a perceived second-rate form of higher education to a prototype that better captures the essential elements of learning for what has been styled in a postmodern world as the Information Age. Overlaid on these considerations is a changing view of the economics of such provision of higher education. It is anticipated that this thesis will contribute to developing new understandings of the construction of subjectivities in relation to the distance education university student specifically, and to the university student generally, in the postmodern world. The implications of this examination are not inconsiderable for students and academics in a self-styled Information Society.

Children's eyewitness memory : participation, presentation media and the disruption effect

This research found that both younger and older children remembered eyewitness events better when presented live rather than on video. Active participation in live events enhanced recall memory. Disruptive incidents were remembered better than irrelevant incidents, but this finding depended on children's age and level of involvement in the event.

Examining representations of women's leadership in the media and Australian universities

Examines how diverse academic women educational leaders experienced and negotiated media representations of leadership in their work. The thesis argues that feminist leadership analyses assume a commonality of women's interests, ignoring the diversity, which exists between different groups of women and the material impact of diversity upon female leaders' work.

Re-conceptualizing disability and assistive technology : Australian consumers driving policy change

For people living with a disability, enablers such as assistive technologies, environmental modifications and personal care can make the difference between living fully and merely existing. This article is written from the standpoints of people with disabilities and professionals in one Australian State who found their government and service system to be a constraining rather than an enabling force. It presents two key components of policy and practice change in the area of assistive technology: challenging understandings of disability, assistive technology, and the desired life outcomes that assistive technology contributes to; and building a public evidence base through consumer-focussed research. In short, government funding of assistive technology needs to move beyond a limited focus on functional needs and take responsibility for fully equipping people to live the lives they aspire to.

Process improvement and ICTs in Australian SMEs: a selection and implementation framework

This article describes the development, modification and testing of a tool designed to assist small firms in making more appropriate decisions regarding information and communication technology (ICT) selection and implementation. Using a combination of quantitative and qualitative methods, a number of possible tools were initially developed to support firm-based self-diagnostic exercises. Research outcomes from a joint European–Australian research project were regionalised for Australian conditions through collaborative product development with a number of Australian SME manufacturing firms. This article reports on the pilot implementations and the outcomes achieved with these Australian SMEs. These implementations have shown successful outcomes for the trial SME participants and have led to the creation of an online self-assessment tool to allow wider access by interested SMEs

Multi-media and real fiction theatre making

Visual images, in the process of both the imagination and conception of a theatre production, are central to contemporary practice in drama-making. The use of multi-media in theatre is not only a fruitful way to represent the visual component of a particular experience, it but also constitutes a way of speaking the unspoken. Visual language expresses through multi-media and allows broaching taboo subjects, speaking directly to the audience in spite of the indirect form and drawing subtle connections with the live action so as to make meaning. The tension between live action and any form of visual art blurs the lines between imagination and reality. The multi-media theatre is a metaphor for the human mind exposed to social reality. It consists of interruptions, half-finished conversations and ideological aspersions including its primary function of meta-representation.

Digital media and girling at an elite girls' school

In this article, I draw on Judith Butler's notion of performativity to investigate the role of digital technologies in processes of gendered subjectification (or ‘girling’) in elite girls' education. Elite girls' schooling is a site where the potential of digital technologies in mediating student‐led constructions and explorations of ‘femininity’ sits alongside school‐produced digital media in the form of promotional texts, in which young femininity is regulated by discourses of ‘girl power’. Whilst such schools are well equipped with digital resources that might be utilised towards students' interrogation of how ‘femininity’ is understood, thus politicising the girling process, school‐produced digital media inscribe a more prescriptive picture of ‘who’ an elite school‐girl can ‘be’. Lyla Girls' Grammar School (LGGS) is an elite secondary school in Melbourne, Australia. I report on research undertaken at two institutional levels of LGGS: the ‘school’ level in which digital media representations of young women are produced by the school and the ‘classroom’ level, in which media education pedagogy includes interactive web conferencing software. The use of digital technologies in media education appeared to support student‐led construction and interrogation of femininities to some extent. I argue that this kind of student‐led girling is important in the context of more prescriptive school‐level girling practices.

Reductions in nutrient discharge from aquaculture through recycling of water utilising floating media and activated carbon filtration

Nutrient discharge into coastal areas, such as the Great Barrier Reef can result in the degradation of coastal ecosystems. For example, excess nitrogen and phosphorus can damage corals through inducing algal bloom and subsequent shading. Excessive phosphorus can further weaken coral skeletons making them susceptible to damage. Land based industries such as aquaculture can contribute to such problems. This study set out to develop a system whereby water from aquaculture can be constantly reused resulting in minimized waste discharge. A three-stage filtration system utilizing floating media and activated carbon was designed to harness bacterial processes that could reduce both particulate and dissolved compounds to the extent whereby approximately 100% reuse of the wastewater became possible. This involved efficient and effective particulate and biological removal mechanisms in both aerobic and anaerobic zones of the filtration system. This design reduced dissolved nitrogen levels by up to 70% and maintained low phosphorus levels, which allowed the reuse of water for the successful culture of barramundi with a survival rate of 97% over 25 days. This pilot scale study demonstrated the potential of reusing aquaculture wastewater from the viewpoint of reducing nutrient input into coastal environments. Future research will refine these processes and assess the performance of the system at several commercial scale applications.