Population structure and life history characteristics of euastacus bispinosus and cherax destructor (Parastacidae) in the Grampians National Park, Australia

Despite being the most widely distributed and cultured freshwater crayfish species in Australia, relatively little is known about the ecology of <i>Cherax destructor i>outside of captivity. Similarly, few ecological studies have been conducted on the large and threatened stream dwelling Australian freshwater crayfish <i>Euastacus bispinosusi>. A series of seasonal sampling surveys over two years investigated the population structure, life history and reproductive timing of <i>C. destructor i>in fire dam habitats, and of <i>Ei>. <i>bispinosusi> in channel (stream) habitats, in the Grampians National Park in south-west Victoria, Australia. <i>Cherax destructori> individuals in the largest size class (50 – 59.95 mm OCL) were not abundant during the study, while those belonging to the 0 – 9.95 mm OCL size class were more frequent in summer than at other times of year, suggesting synchronous recruitment in fire dam habitats. Individuals in the reproductively active mid-size classes were also frequent in summer. For <i>E. bispinosusi>, sex ratios in spring always favoured females, although there were no clear trends for other times of year. Gravid <i>E. bispinosusi> females were found in winter and spring throughout the study, and were sexually mature at a smaller size than has previously been reported.

The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.

Gonadotropin-releasing hormone (GnRH) is a neuropeptide that is conserved in both vertebrate and invertebrate species. In this study, we have demonstrated the presence and distribution of two isoforms of GnRH-like peptides in neural ganglia and ovary of reproductively mature female abalone, <i>Haliotis asinina,i> using immunohistochemistry. We found significant immunoreactivities (ir) of anti-lamprey(I) GnRH-III and anti-tunicate(t) GnRH, but with variation of labeling intensity by each anti-GnRH type. IGnRH-III-ir was detected in numerous type1 neurosecretory cells (NS1) throughout the cerebral and pleuropedal ganglia, whereas tGnRH-I-ir was detected in only a few NS1 cells in the dorsal region of cerebral and pleuropedal ganglia. In addition, a small number of type2 neurosecretory cells (NS2) in cerebral ganglion showed lGnRH-III-ir. Long nerve fibers in the neuropil of ventral regions of the cerebral and pleuropedal ganglia showed strong tGnRH-I-ir. In the ovary, lGnRH-III-ir was found primarily in oogonia and stage I oocytes, whereas tGnRH-ir was observed in stage I oocytes and some stage II oocytes. These results indicate that GnRH produced in neural ganglia may act in neural signaling. Alternatively, GnRH may also be synthesized locally in the ovary where it could induce oocytes development.

Guadalupian (Middle Permian) brachiopods from Sungai Toh, a Leptodus Shale locality in the Central Belt of Peninsular Malaysia. Part I: Lower Horizons

This work presents a systematic study of Permian Brachiopoda from the Sungai Toh <i>Leptodusi> Shale locality, Pahang State, Peninsular Malaysia. This locality lies within the Central Belt of Peninsular Malaysia, a tectonic unit characterised.by tuffaceous sediments and limestones of Late Palaeozoic age. Two brachiopod-bearing horizons were studied in detail at this locality, the lower one (Horizon 2) bearing a mixed plant and invertebrate assemblage, including the brachiopods <i>Urushtenoidea chaoi i>(CHING), <i>Leptodus richthofeni i>KAYSER, <i>Anidanthus i>cf.<i> sinosusi> HUANG, <i>Acosarina dorashamensis i>(SOKOLSKAJA), <i>A. minutai> (ABleH) and unidentifiable species of <i>Linoproduetusi>, <i>Neochonetesi>, and <i>Strophalosiina.i> Horizon 3 contains a more abundant and diverse brachiopod fauna, comprising a total. of 57 species representing 47 genera, including <i>Vediproductus punetatiformis i>(CHAO), <i>Permianella typicai> HE & ZHU, <i>Tranrennatia gratiosai> (WAAGEN), <i>Leptodus richthofenii> KAYSER, <i>Leptodus i>cf. <i>tenuisi> (WAAGEN) and "<i>Semibrachythyrinai>" [= <i>Alphaneospiriferi>] cf. <i>pyramidiformisi> LIANG. It is
suggested in this study that the age of the Sungai Toh locality is Capitanian (late Guadalupian) to possibly Wuchiapingian (early Lopingian),
as it appears to correlate well with the Lengwu fauna from Zhejiang in eastern China. The palaeobiogeographical affinities of the Sungai Toh fauna are interesting, mainly indicating strong Palaeo-equatorial affinities, while there are also some elements more typical of the cooler periGondwana
Region.

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.

Patient safety ethics and human error management in ED contexts part I : development of the global patient safety movement

In recent years there has been increasing recognition internationally that health care is not as safe as it ought to be and that patient safety outcomes need to be improved. To this end patient safety has become the focus of a world-wide endeavour aimed at reducing the incidence and impact of preventable human errors and related adverse events in health care domains. The emergency department has been identified as a significant site of preventable human errors and adverse events in the health care system, raising important questions about the nature of human error management and patient safety ethics in rapidly changing environments. In this article (the first of a two-part discussion on the subject) an overview of the incidence and impact of preventable adverse events in ED contexts is explored. The development of a ‘culture of safety’ in other hazardous industries and the ‘lessons learned’ and applied to the health care industry are also briefly examined. In a second article (to be presented as Part II), some of the ethical tensions that have arisen in the context of implementing patient safety processes and their possible implications for ED contexts are explored.

'I do lots of things that the University would not approve of'. What counts as professional knowledge in the eyes of pre-service and beginning teachers -implications of the encounter for the role of teacher educators in pre-service middle school preparati

This paper is an account of teacher educator perceptions of the take-up by beginning teachers of the values and practices advocated in pre-service education. Methodologically grounded in a critical ethnographic account, two teacher educator/researchers retell their understanding of the one-month experience as middle school classroom teachers in an allocated school. The paper examines the consequences of what counts as professional knowledge in the eyes of pre-service and beginning teachers and the implications of the encounter for the role of teacher educators in preservice preparation. The purpose of the research is to consider the well-researched issue of the rejection of academic training (to greater or lesser extents) that is experienced by very many preservice and beginning teachers at some stage after experience in schools. As an exemplary colleague teacher said to us as we negotiated our participation in the school: "I do lots of things that the University would not approve of". Our argument is that teacher education needs the kind of participatory inquiry represented by the undertaking and methodology of this project. The paper is the 'primary record' (Carspecken 1996) of the research and works to open the next phase, the dialogical stage of the research process.

Extraction of silver(i) from aqueous solutions in the absence and presence of copper(ii) with a methimazole-based ionic liquid

The ionic liquid (IL) 2-butylthiolonium bis(trifluoromethanesulfonyl)amide, [mimSBu][NTf₂], facilitates the efficient extraction of silver(i) from aqueous media via interaction with both the cation and anion components of the IL. Studies with a conventional aqueous-IL two phase system as well as microextraction of silver(i) by a thick IL film adhered to an electrode monitored in situ by cyclic voltammetry, established that [mimSBu][NTf₂] can extract electroactive silver(i) ions from an aqueous solution. The pH of the aqueous phase decreases upon addition of [mimSBu]⁺, which is attributed to partial release of the hydrogen attached to the N(3) nitrogen atom of the imidazolium ring. The presence of silver(i) further increase the acidity of the aqueous phase as a consequence of coordination with the IL cation component. Voltammetric and ¹H and ¹³C NMR techniques have been used to establish the nature of the silver(i) complexes extracted, and show that the form of interaction with the IL differs from that outlined previously for the extraction of copper(ii). Insights on the competition established when silver(i) is extracted in the presence of copper(ii) are provided. Finally, it is noted that metallic silver can be directly electrodeposited at the electrode surface after extraction of silver(i) into [mimSBu][NTf₂] and that back extraction of silver(i) into aqueous media is achieved by addition of an acidic aqueous solution.

Conservation of the ST6Gal I gene and its expression in the mammary gland

Milk sialoglycoconjugates can protect the gastrointestinal tract of the suckling neonate by competitively binding to invading pathogens and promoting growth of beneficial flora, and their potential role in postnatal brain development is of particular interest in human infant nutrition. Although the concentration and the distribution of sialoglycoconjugates have been extensively studied in the milk of various species, the investigation of sialyltransferase gene expression in the mammary gland, in the context of lactation, has been limited. The sialyltransferase enzyme ST6Gal I transfers sialic acid from CMP-sialic acid to type 2 (Galβ1,4GlcNAc) free disaccharides or the termini of N- or O-linked oligosaccharides using an α2,6-linkage. Expression of the ST6Gal I gene is primarily regulated at the level of transcription through the use of several cell and development- specific promoters, producing transcripts with divergent 5&prime; untranslated regions (UTR). In the mouse mammary gland, the novel 5&prime;UTR exon (L) appears to be associated with a drastic increase in ST6Gal I gene expression during lactation. We find that rats also possess an exon (L), suggesting conservation of this regulatory mechanism in rodents. In contrast, an exon (L)-containing transcript was not detected in the lactating bovine or human mammary gland. We also observed a trend of increasing ST6Gal I gene expression in the bovine mammary gland, culminating in involution. This is in contrast to species such as mice where the greatest change in ST6Gal I gene expression occurs between pregnancy and lactation, suggesting different roles in rodents vs. other mammals for α2,6-sialylated oligosaccharides present in milk.

I'm the slice of pie that's ostracised.... : Foucault's technologies, and personal agency, in the voice of women who are homeless, Adelaide, South Australia

In contrast to the international research (particularly in the United Kingdom and North America), much of the Australian literature regarding homelessness to date omits the perspective of people who are homeless. In contributing to the fledgling Australian literature in the field, the following article adopts a secondary approach to the data analysis of original research. When analysed, the voices of homeless women from an agency in Adelaide, South Australia exhibit elements of both Foucault’s technologies of domination and the self. While the results show that the women do have a powerful sense of the broader external issues exerted on them (reflecting both technologies of domination and the self), the analysis also reveals ambiguities in their responses. Apparent in the voice of homeless women is a sense of personal agency which appears to be absent in Foucault’s technologies. By considering the viewpoints of homeless women, various policy implications can also be drawn. Indeed, this is one of the motivations of the article, namely to inject into policy debate and development the voices of the people most adversely affected by it. The policy implications of the women’s voices centre around the desire to be included rather than remain on the margins, the need for supportive relationships, the necessity to take small steps to independent living, and the need for more affordable, independent housing.

π-Selective stationary phases: (I) Influence of the spacer chain length of phenyl type phases on the aromatic and methylene selectivity of aromatic compounds in reversed phase high performance liquid chromatography

Phenyl type stationary phases of increasing spacer chain length (phenyl, methyl phenyl, ethyl phenyl, propyl phenyl and butyl phenyl, with 0–4 carbon atoms in the spacer chain, respectively) were synthesised and packed in house to determine the impact that the spacer chain length has on the retention process. Two trends in the aromatic selectivity, <i>qi>_aromatic, were observed, depending on whether the number of carbon atoms in the spacer chain is even or odd. Linear log <i>k&prime;i> vs <i>ϕi> plots were obtained for each stationary phase and the <i>Si> coefficient was determined from the gradient of these plots. For the phenyl type phases, the <i>Si> vs <i>ni>_<i>ci> plots of the retention factors of linear polycyclic aromatic hydrocarbons vs the number of rings exhibit a distinct discontinuity that between 3 and 4 rings, which increases with increasing spacer chain length for even phases but decreases for odd phases. Accordingly, we suggest that the retention factors depend differently on the number of carbon atoms in the spacer chain depending on whether this number is even or odd and that this effect is caused by different orientations of the aromatic ring relative to the silica surface.

How did I get here? The experiences of female physical education teachers in all boys' schools

Historically, physical education and sport were constructed as curriculum practices for boys to explore, channel and hone their masculinity. While much has changed since their induction into the curriculum, there is a prevailing view that sport and physical education continue to operate as powerful conduits to the dominant masculinity. In a climate where the underachievement of boys’ in social and educational contexts is becoming increasingly concerning, much of the literature attributes factors such as a lack of male role models, the feminisation of education and the lack of ‘boy friendly’ curriculum and pedagogy as key contributors to the current dilemma. The role of physical education and sport in the gender socialisation process poses some important questions about the place of female physical educators in this ‘male component’ of the curriculum. Foremost here are questions about the capacity of female physical educators to provide effective learning and socialising opportunities to young males. This paper draws on research into the experiences of female physical education teachers working in all-boy schools to discuss issues of gender, power and pedagogy.

Book review : In the shadow of Gallipoli: the hidden history of Australia in World War I

Review of: In the Shadow of Gallipoli: the hidden history of Australia in World War I, by Robert Bollard. (Sydney: New South Wales, 2013)