Are information sources associated with Australian`s beliefs about the necessity of meat?

The aim of this study was to examine whether use of and trust in health, food, and nutrition information sources are associated with the belief that meat is a necessary dietary component. Over 700 South Australians participated in a questionnaire survey that included questions on frequency of use of and level of trust in information sources, vegetarian status, meat beliefs, and demography. It was found that information sources are associated with the belief that meat is necessary, since they
accounted for over 40% of the variance for all respondents. The most important associations were: lack of use of unorthodox sources; trust in orthodox sources; trust in advertising and the mass media; and trust in and use of social sources. There were differences in which predictors were important, however, depending on the respondent's sex, age, and vegetarian status. The implications of these observed communities of interest for health promotion are discussed.

An objective function based on Bayesian likelihoods of necessity and sufficiency for concept learning in the absence of labeled counter-examples

Supervised machine learning techniques generally require that the training set on which learning is based contain sufficient examples representative of the target concept, as well as known counter-examples of the concept; however, in many application domains it is not possible to supply a set of labeled counter-examples. This paper proposes an objective function based on Bayesian likelihoods of necessity and sufficiency. This function can be used to guide search towards the discovery of a concept description given only a set of labeled positive examples of the target concept, and as a corpus of unlabeled examples. Results of experiments performed on several datasets from the VCI repository show that the technique achieves comparable accuracy to conventional supervised learning techniques, despite the fact that the latter require a set of labeled counter-examples to be supplied. The technique can be applied in many domains in which the provision of labeled counter-examples is problematic.

The need to examine metastatic tissue at the time of progression of breast cancer : is re-biopsy a necessity or a luxury?

Knowledge of estrogen receptor (ER), progesterone receptor (PgR) and human epidermal growth factor receptor-2 (HER2) status is necessary for determining the optimal treatment of breast cancer patients. At the same time, the discordance between marker profiles (ER/PR and HER2) of primary and metastatic breast cancer is well documented. Whether discordant cases are secondary to “clonal selection” in the face of targeted anti-estrogen or anti-HER2 therapy or whether they are a laboratory artifact is still debated; both scenarios are likely. This article outlines current modalities for ER, PR, and HER2 testing in primary breast carcinoma and its metastases and reviews prospective and retrospective studies that have addressed these issues, as well as recent advances in the field.

Quo iure? Defendants' liability to rescuers in the tort of negligence

The year 2001 marks the 80th anniversary of Cardozo J's judgment in Wagner v International Railway Co 232 NY 176 (1921). This article examines theoretical and procedural problems associated with the concept of duty of care as a foundation for the defendant's liability in negligence to altruistic rescuers, and suggests that Cardozo J's judgment did not establish the principle that defendants owe rescuers a duty of care in negligence. It is argued that subsequent judgments failed to provide the duty of care owed to rescuers under tortious negligence with proper jurisprudential foundations. Conceptual difficulties inherent in a jurisprudential principle that would provide physically injured rescuers with a legal right to a duty of care from the defendant under the tort of negligence were compounded once compensation for negligently occasioned pure emotional distress became available. This article analyses various theories of recovery for pure psychiatric injury and the classification of rescuers into primary and secondary victims. It proposes a solution in the form of a separate cause of action on the case for liability to injured rescuers, partly based on the principle of necessity that governs the Roman action for negotiorum gestio. Cases from the United States, England and Australia are used to illustrate the similarities and differences in the development of and approaches to, the law of rescue.

Amplification of multiple copies of mitochondrial Cytochrome b gene fragments in the Australian freshwater crayfish, Cherax destructor Clark (Parastacidae: Decapoda)

Non-coding copies of fragments of the mitochondrial genome translocated to the nucleus or pseudogenes are being found with increasing frequency in a diversity of organisms. As part of a study to evaluate the utility of a range of mitochondrial gene regions for population genetic and systematic studies of the Australian freshwater crayfish, Cherax destructor (the yabby), we report the first detection of Cytochrome b (Cyt b) pseudogenes in crustaceans. We amplified and sequenced fragments of the mitochondrial Cyt b gene from 14 individuals of C. destructor using polymerase chain reaction (PCR) with primers designed from conserved regions of Penaeus monodon and Drosophila melanogaster mitochondrial genomes. The phylogenetic tree produced from the amplified fragments using these primers showed a very different topology to the trees obtained from sequences from three other mitochondrial genes, suggesting one or more nuclear pseudogenes have been amplified. Supporting this conclusion, two highly divergent sequences were isolated from each of two single individuals, and a 2 base pair (bp) deletion in one sequence was observed. There was no evidence to support inadvertent amplification of parasite DNA or contamination of samples from other sources. These results add to other recent observations of pseudogenes suggesting the frequent transfer of mitochondrial DNA (mtDNA) genes to the nucleus and reinforces the necessity of great care in interpreting PCR-generated Cyt b sequences used in population or evolutionary studies in freshwater crayfish and crustaceans more generally.

Towards critical social work practice in mental health: a review

Progressive social work perspectives that draw on both critical theories and postmodern thought, provide highly relevant and appropriate frameworks to inform social work practice in the mental health field. Despite this, the literature overviewed indicates that the majority of social work practice conducted in mental health settings reflects an uncritical embrace of the medical model of psychiatric illness, and therefore largely neglects social work approaches which utilize critical principles. The following article explores the possibilities for applying a critical model of social work practice to the mental health field, and argues the necessity for social workers to actively engage with critical practice, even in medically dominated settings, to effectively work towards the espoused social justice ethics and mission of the social work profession.

Driven to abstraction: doctoral supervision and writing pedagogies

The writing of academic abstracts is more than a tiresome necessity of scholarly life. It is a practice that goes beyond genre and technique to questions of writing and identity. In this article we deconstruct a series of abstracts from a variety of refereed journals to 'read' for the representation of data, argument, methodology and significance. We describe one strategy for writing abstracts, developed as part of a long-term project on postgraduate writing pedagogies. We propose that the art of writing abstracts is neglected in the academy, is given scant attention by journal editors, and has produced a motley and often bland array of conventions and genres. We suggest that abstract art should be an important aspect of supervision if graduate students and novice researchers are to stake a claim in the academy.

Tensions and constraints for nurses in hospital-in-home programmes

Economic necessity constrains health-care expenditure and waiting lists for hospital treatments remain high. As a result, more care is delivered via alternative means, such as same-day surgery initiatives and home-care programmes. Acute care delivered in the home to patients who would otherwise require hospitalization is becoming an increasingly acceptable means of treatment. These Hospital-in-the-Home programmes offer increased comfort while delivering comparable outcomes to many patient groups. The purpose of this paper is to generate discussion concerning the tensions that exist for nurses who practice in the home under the auspices of acute-care institutions. Data drawn from field work that formed part of a critical ethnography is used to generate the discussion. The larger research project explored the constructions of the role of the nurse in four Hospital-in-the-Home programmes in Victoria, Australia. It will be argued that there is significant pressure exerted upon nurses to support the imperative to reduce bed days in acute hospitals by transferring people to their home. At times, this agenda clashes with the nurses’ professional commitment to provide holistic patient care yet the dilemmas are largely unacknowledged and/or unrecognized by the nurses despite the tension they generate.

Futures now - teaching futures education

In the post-modern world, it has been said that there is now greater uncertainty in life than in any previous period, simply because so much has changed as a result of the speed of technological change.

From the educational view point, Futures education is a necessity as times continue to change, in regards to both the sustainability of the person and that of the environment. It is true that uncertainty will always remain an aspect of thinking about the future, however in order to make what is ahead more accessible to everyone, educators have a duty of care to their students to facilitate or educate in regards to tools, concepts and understandings which will help students to become world shapers, and shapers of their own personal futures. This must occur as part of ongoing educator training.

Parallel I/O scheduling in the presence of data duplication on multiprogrammed cluster computing systems

The widespread adoption of cluster computing as a high performance computing platform has seen the growth of data intensive scientific, engineering and commercial applications such as digital libraries, climate modeling, computational chemistry, computational fluid dynamics and image repositories. However, I/O subsystem performance has not been keeping pace with processor and memory performance, and is fast becoming the dominant factor in overall system performance.  Thus, parallel I/O has become a necessity in the face of performance improvements in other areas of computing systems. This paper addresses the problem of parallel I/O scheduling on cluster computing systems in the presence of data replication.  We propose two new I/O scheduling algorithms and evaluate the relative performance of the proposed policies against two existing approaches.  Simulation results show that the proposed policies perform substantially better than the baseline policies.

Terry Matassoni : a walk into town

An exhibition held at Stonington Stables Museum of Art, Deakin University, Toorak Campus 4 March - 12 April 2003. Terry Matassoni’s peopled urban landscapes speak of diversity and disconnectedness often depicting the isolation of people who are by necessity in close physical proximity to one another.

Policy, preparation and prevention : proactive minimisation of student plagiarism

Countless cases of plagiarism are detected across the Australian higher education sector each year. Generally speaking, policy and other responses to the issue focus on punitive, rather than on educative, measures. Recently, a subtle shift is discernable. As well as ensuring appropriate consequences for plagiarists, several universities are beginning to formalise the inclusion of learning and teaching strategies in anti-plagiarism related policy and practice, as well as paying closer attention to the communication of unambiguous definitions of plagiarism. This article outlines one example of the emerging educative approach and details the ways in which this approach has been implemented across an entire university. The necessity of evidence-based evaluation of approaches to reducing plagiarism in higher education is discussed.