Pore structure characterization of North American shale gas reservoirs using USANS/SANS, gas adsorption, and mercury intrusion

Small-angle and ultra-small-angle neutron scattering (SANS and USANS), low-pressure adsorption (N2 and CO2), and high-pressure mercury intrusion measurements were performed on a suite of North American shale reservoir samples providing the first ever comparison of all these techniques for characterizing the complex pore structure of shales. The techniques were used to gain insight into the nature of the pore structure including pore geometry, pore size distribution and accessible versus inaccessible porosity. Reservoir samples for analysis were taken from currently-active shale gas plays including the Barnett, Marcellus, Haynesville, Eagle Ford, Woodford, Muskwa, and Duvernay shales. Low-pressure adsorption revealed strong differences in BET surface area and pore volumes for the sample suite, consistent with variability in composition of the samples. The combination of CO2 and N2 adsorption data allowed pore size distributions to be created for micro–meso–macroporosity up to a limit of �1000 Å. Pore size distributions are either uni- or multi-modal. The adsorption-derived pore size distributions for some samples are inconsistent with mercury intrusion data, likely owing to a combination of grain compression during high-pressure intrusion, and the fact that mercury intrusion yields information about pore throat rather than pore body distributions. SANS/USANS scattering data indicate a fractal geometry (power-law scattering) for a wide range of pore sizes and provide evidence that nanometer-scale spatial ordering occurs in lower mesopore–micropore range for some samples, which may be associated with inter-layer spacing in clay minerals. SANS/USANS pore radius distributions were converted to pore volume distributions for direct comparison with adsorption data. For the overlap region between the two methods, the agreement is quite good. Accessible porosity in the pore size (radius) range 5 nm–10 lm was determined for a Barnett shale sample using the contrast matching method with pressurized deuterated methane fluid. The results demonstrate that accessible porosity is pore-size dependent.

Developing intercultural competence in pre-service teachers from Australia and Malaysia : insights from the “Patches” programme

Developing intercultural competence in pre-service teachers from Australia and Malaysia: Insights from a Patches program. Innovative pedagogies can offer pre-service teachers the opportunity to develop their intercultural competence and take up more globalised viewpoints. One such innovation is the Patches program which brought together Malaysian and Australian pre-service teachers who were studying at the same university in Brisbane, Australia, to actively explore issues of cultural and linguistic difference. The participants were 14 Australian fourth-year pre-service teachers who were enrolled in a program on inclusive education, and 58 Malaysian pre-service teachers who had recently arrived at the university in Brisbane to commence their second year of an international education program. In peer groupings, these domestic and international pre-service teachers engaged in a series of interactive tasks and reflective writing workshops exploring intercultural experiences, over a period of ten weeks. Each element or ‘patch’ in the program was designed to build up into a mosaic of intercultural learning. The flexible structuring of the Patches Program provided a supportive framework for participant interaction whilst allowing the groups to decide for themselves the nature and extent of their involvement in a series of community-related tasks. The process of negotiating and implementing these activities formed the basis for establishing meaningful relationships between the participants. The development of the participants’ intercultural competence is traced through their reflective narratives and focus group discussions, drawing on Byram’s concept of the five savoirs. Explaining aspects of Australian culture to their newly arrived Malaysian peers, allowed the Australian pre-service teachers to take a perspective of outsideness towards their own familiar social practices. In addition, being unusually positioned as the linguistic other amongst a group of Bahasa Melayu speakers, highlighted for the Australian pre-service teachers the importance of being inclusive. For the Malaysian pre-service teachers, participation in the Patches program helped to extend intercultural understandings, establish social networks with local students, and build a sense of community in their new learning environment. Both groups of pre-service teachers noted the power of “learning directly by interacting rather than through books”. In addition to interacting interculturally, the process of reflecting on these intercultural experiences is seen as integral to the development of intercultural competence.

Carbonate cementation in sandstones of the Plover Formation, North West Shelf, W.A

Ancient sandstones include important reservoirs for hydrocarbons (oil and gas), but, in many cases, their ability to serve as reservoirs is heavily constrained by the effects of carbonate cements on porosity and permeability. This study investigated the controls on distribution and abundance of carbonate cements within the Jurassic Plover Formation, Browse Basin, North West Shelf, Australia. Samples were analysed petrographically with point counting of 59 thin sections and mineralogically with x-ray diffraction from two wells within the Torosa Gas Field. Selected samples were also analysed for stable isotopes of O and C. Sandstones are classified into eleven groups. Most abundant are quartzarenites and then calcareous quartzarenites. Lithology ranged between sandstones consisting of mostly quartz with scant or no carbonate in the form of cement or allochems, to sandstones with as much as 40% carbonate. The major sources of carbonate cement in Torosa 1 and Torosa 4 sandstones were found to be early, shallow marine diagenetic processes (including cementation), followed by calcite cementation and recrystallisation of cements and allochems during redistribution by meteoric waters. Blocky and sparry calcite cements, indicative of meteoric environments on the basis of stable isotope values and palaeotemperature assessment, overprinted the initial shallow marine cement phase in all cases and meteoric cements are dominant. Torosa 4 was influenced more by marine settings than Torosa 1, and thus has the greater potential for calcite cement. The relatively low compaction of calcite-cemented sandstones and the stable isotope data suggest deep burial cementation was not a major factor. Insufficient volcanic rock fragments or authigenic clay content infers alteration of feldspars was not a major source of calcite. Very little feldspar is present, altered or otherwise. Hence, increased alkalinity from feldspar dissolution is not a contributing factor in cement formation. Increased alkalinity from bacterial sulphate reduction in organic–rich fine sediments may have driven limited cementation in some samples. The main definable and significant source of diagenetic marine calcite cement originated from original marine cements and the nearby dissolution of biogenic sources (allochems) at relatively shallow depths. Later diagenetic fluids emplaced minor dolomite, but this cement did not greatly affect the reservoir quality in the samples studied.

Targeted control of feral pigs in far north Queensland : defining management units using molecular techniques

The feral pig, Sus scrofa, is a widespread and abundant invasive species in Australia. Feral pigs pose a significant threat to the environment, agricultural industry, and human health, and in far north Queensland they endanger World Heritage values of the Wet Tropics. Historical records document the first introduction of domestic pigs into Australia via European settlers in 1788 and subsequent introductions from Asia from 1827 onwards. Since this time, domestic pigs have been accidentally and deliberately released into the wild and significant feral pig populations have become established, resulting in the declaration of this species as a class 2 pest in Queensland. The overall objective of this study was to assess the population genetic structure of feral pigs in far north Queensland, in particular to enable delineation of demographically independent management units. The identification of ecologically meaningful management units using molecular techniques can assist in targeting feral pig control to bring about effective long-term management. Molecular genetic analysis was undertaken on 434 feral pigs from 35 localities between Tully and Innisfail. Seven polymorphic and unlinked microsatellite loci were screened and fixation indices (FST and analogues) and Bayesian clustering methods were used to identify population structure and management units in the study area. Sequencing of the hyper-variable mitochondrial control region (D-loop) of 35 feral pigs was also examined to identify pig ancestry. Three management units were identified in the study at a scale of 25 to 35 km. Even with the strong pattern of genetic structure identified in the study area, some evidence of long distance dispersal and/or translocation was found as a small number of individuals exhibited ancestry from a management unit outside of which they were sampled. Overall, gene flow in the study area was found to be influenced by environmental features such as topography and land use, but no distinct or obvious natural or anthropogenic geographic barriers were identified. Furthermore, strong evidence was found for non-random mating between pigs of European and Asian breeds indicating that feral pig ancestry influences their population genetic structure. Phylogenetic analysis revealed two distinct mitochondrial DNA clades, representing Asian domestic pig breeds and European breeds. A significant finding was that pigs of Asian origin living in Innisfail and south Tully were not mating randomly with European breed pigs populating the nearby Mission Beach area. Feral pig control should be implemented in each of the management units identified in this study. The control should be coordinated across properties within each management unit to prevent re-colonisation from adjacent localities. The adjacent rainforest and National Park Estates, as well as the rainforest-crop boundary should be included in a simultaneous control operation for greater success.

Design of a professional development programme for palliative care nurses (Part Two)

Yates et al (1996) provided a review of the literature on educational approaches to improving psychosocial care of terminally ill patients and their families and suggested that there was an urgent need for innovation in this area. A programme of professional development currently being offered to 181 palliative care nurses in Queensland, Australia, was also described. This paper presents research in progress evaluating this programme which involves use of a quasi-experimental pre-post test design. It also includes process and outcome measures to assess effectiveness in improving the participant's ability to provide psychosocial care to patients and families. Research examining the effectiveness of various educational programmes on care of the dying has offered equivocal results (Yates et al 1996). Degner and Gow (1988a) noted that the inconsistencies found in research into death education result from inadequate study designs, variations in the conceptualisation and measurement of the outcomes of the programmes and flaws in data analysis. Such studies have often lacked a theoretical basis, few have employed well-controlled experimental designs, and the programme outcomes have generally been limited to the participant's 'death anxiety', or other death attitudes which have been variously defined and measured. Whilst Degner and Gow (1988b) have reported that undergraduate nursing students who participated in a care of the dying educational programme demonstrated more 'approach caring' behaviours than a control group, the impact of education programmes on patient care has rarely been examined. Failure to link education to nursing practice and subsequent clinical outcomes has, however, been seen as a major limitation of nursing knowledge in this area (Degner et al 1991). This paper describes an approach to researching the effectiveness of professional development programmes for palliative care nurses.

Peer mentorship in clinical education : outcomes of a pilot programme for first year students

Identifying effective strategies for promoting learning in the clinical setting continues to pose challenges for nurse educators. The aim of the present paper is to examine the potential that peer mentorship may have in helping nursing students to improve clinical learning outcomes. An example of a peer mentorship programme for nursing students undertaking their first clinical practicum is described, and preliminary findings from an evaluation of this pilot programme are presented. The results suggest that peer mentorship may be of some benefit to students, particularly in relation to reducing anxiety and improving confidence with clinical practice experiences, and is therefore a strategy which is worthy of further investigation.

Improving psychosocial care: a professional development programme

Despite the numerous reports of difficulties experienced by health care providers in providing psychosocial care to terminally ill patients and their families, few studies have yet been undertaken to examine the effectiveness of different educational approaches to addressing these issues. The aim of this paper is to describe a programme of professional development for palliative care nurses, which is currently being offered to 181 registered nurses in Queensland, Australia. The programme is based on an action learning model and is designed to facilitate processes of reflection and peer consultation. In Part One of this paper, a review of this literature is presented to provide the background and rationale for the programme design. Details of the research programme developed to evaluate the programme will be presented in Part Two of this paper, which is to be published in the next issue of this Journal. Surveys of health professionals suggest that the demands of working with terminally ill patients are associated with a great deal of stress (Beaton and Degner 1990, Seale 1992, Vachon 1995), and emotional burden, as they are confronted with their patients' physical and emotional suffering over extended periods of time (Ullrich and Fitzgerald 1990). Key areas of concern (Lyons 1988, Bramwell 1989, Seale 1992, Copp and Dunn 1993, Wilkinson 1995) include: * Handling questions and conversations with dying patients. * Dealing with ethical and moral issues. * Handling emotions. * Giving hope. * Providing spiritual care and bereavement support. * Confronting team communication problems.

Gestational Diabetes Mellitus in Far North Queensland, Australia, 2004 to 2010 : midwives’ perinatal data most accurate source

Objectives: This study examines the accuracy of Gestational Diabetes Mellitus (GDM) case-ascertainment in routinely collected data. Methods: Retrospective cohort study analysed routinely collected data from all births at Cairns Base Hospital, Australia, from 1 January 2004 to 31 December 2010 in the Cairns Base Hospital Clinical Coding system (CBHCC) and the Queensland Perinatal Data Collection (QPDC). GDM case ascertainment in the National Diabetes Services Scheme (NDSS) and Cairns Diabetes Centre (CDC) data were compared. Results: From 2004 to 2010, the specificity of GDM case-ascertainment in the QPDC was 99%. In 2010, only 2 of 225 additional cases were identified from the CDC and CBHCC, suggesting QPDC sensitivity is also over 99%. In comparison, the sensitivity of the CBHCC data was 80% during 2004–2010. The sensitivity of CDC data was 74% in 2010. During 2010, 223 births were coded as GDM in the QPDC, and the NDSS registered 247 women with GDM from the same postcodes, suggesting reasonable uptake on the NDSS register. However, the proportion of Aboriginal and Torres Strait Islander women was lower than expected. Conclusion: The accuracy of GDM case ascertainment in the QPDC appears high, with lower accuracy in routinely collected hospital and local health service data. This limits capacity of local data for planning and evaluation, and developing structured systems to improve post-pregnancy care, and may underestimate resources required. Implications: Data linkage should be considered to improve accuracy of routinely collected local health service data. The accuracy of the NDSS for Aboriginal and Torres Strait Islander women requires further evaluation.

Late Quaternary vegetation history of North Stradbroke Island, Queensland, eastern Australia

Currently there is a paucity of records of late Quaternary palaeoenvironmental variability available from the subtropics of Australia. The three continuous palaeoecological records presented here, from North Stradbroke Island, subtropical Queensland, assist in bridging this large spatial gap in the current state of knowledge. The dominance of arboreal taxa in the pollen records throughout the past >40,000 years is in contrast with the majority of records from temperate Australia, and indicates a positive moisture balance for North Stradbroke Island. The charcoal records show considerable inter-site variability indicating the importance of local-scale events on individual records, and highlighting the caution that needs to be applied when interpreting a single site as a regional record. The variability in the burning regimes is interpreted as being influenced by both climatic and human factors. Despite this inter-site variability, broad environmental trends are identifiable, with changes in the three records comparable with the OZ-INTIMATE climate synthesis for the last 35,000 years.

Cost-effectiveness of a telephone-delivered education programme to prevent early childhood caries in a disadvantaged area : a cohort study

Objectives Early childhood caries is a highly destructive dental disease which is compounded by the need for young children to be treated under general anaesthesia. In Australia, there are long waiting periods for treatment at public hospitals. In this paper, we examined the costs and patient outcomes of a prevention programme for early childhood caries to assess its value for government services. Design Cost-effectiveness analysis using a Markov model. Setting Public dental patients in a low socioeconomic, socially disadvantaged area in the State of Queensland, Australia. Participants Children aged 6 months to 6 years received either a telephone prevention programme or usual care. Primary and secondary outcome measures A mathematical model was used to assess caries incidence and public dental treatment costs for a cohort of children. Healthcare costs, treatment probabilities and caries incidence were modelled from 6 months to 6 years of age based on trial data from mothers and their children who received either a telephone prevention programme or usual care. Sensitivity analyses were used to assess the robustness of the findings to uncertainty in the model estimates. Results By age 6 years, the telephone intervention programme had prevented an estimated 43 carious teeth and saved £69 984 in healthcare costs per 100 children. The results were sensitive to the cost of general anaesthesia (cost-savings range £36 043–£97 298) and the incidence of caries in the prevention group (cost-savings range £59 496–£83 368) and usual care (cost-savings range £46 833–£93 328), but there were cost savings in all scenarios. Conclusions A telephone intervention that aims to prevent early childhood caries is likely to generate considerable and immediate patient benefits and cost savings to the public dental health service in disadvantaged communities.

Does a functional activity programme improve function, quality of life, and falls for residents in long term care? Cluster randomised controlled trial

Objective To assess the effectiveness of an activity programme in improving function, quality of life, and falls in older people in residential care. Design Cluster randomised controlled trial with one year follow-up. Setting 41low level dependency residential carehomes in New Zealand. Participants 682 people aged 65 years or over. Interventions 330 residents were offered a goal setting and individualised activities of daily living activity programme by a gerontology nurse, reinforced by usual healthcare assistants; 352 residents received social visits. Main outcome measures Function (late life function and disability instruments, elderly mobility scale, FICSIT-4

International acclaim : the role(s) of the international film festival in supporting emerging women’s cinema

International Film Festivals act as important sites for the exhibition of contemporary world cinema. Film festivals represent an increasingly transnational film culture, where audiences, filmmakers, distributors, press, critics and academics come together from all over the world to discover new films, network with one another and debate about the past, present and future of cinema. This research project investigates the role that international film festivals play within the wider international film industry, with a specific focus on emerging women filmmakers. It therefore explores the arena of contemporary women.s cinema at its intersection with the international film festival industry. The significance and original contribution of the research is its intervention in the growing field of film festival studies through a specific investigation of how international film festivals support emerging women filmmakers. The positioning of the research at the intersection of feminist film theory and festival research within the broader context of transnational cinema allows the examination of each festival, the attending filmmakers and their films to be addressed within a more refined and nuanced lens. A core method for the thesis is the close textual analysis of particular emerging women filmmakers. films which are screened at the respective festivals. The research also utilises the qualitative research strategies of the case study and the interview to ¡°seek to understand the context or setting of the participants through visiting this context and gathering information personally¡± (Creswell 2003, 9). The textual analysis is used in dialogue with the interviews and the participant observational data gathering to provide a related context for understanding these films and their cultural meanings, both personally for the filmmaker and transnationally across the festival circuit. The focus of the case studies is the Brisbane International Film Festival, the International Film Festival Rotterdam and the Toronto International Film Festival. These three festivals were chosen for their distinct geographical locations in the Asia Pacific, Europe and North America, as well as for their varying size and influence on the international film festival circuit. Specifically, I investigate the reasons behind why the organisers of a particular festival have chosen a certain woman.s film, how it is then packaged or displayed within the programme, and how all of this impacts on the filmmaker herself. The focus of my research is to investigate film festivals and their .real-life. applications and benefits for the filmmakers being supported, both through the exhibition of their films and through their attendance as festival guests. The research finds that the current generation of emerging women filmmakers has varying levels of experience and success at negotiating the international film festival circuit. Each of the three festivals examined include and promote the films of emerging women filmmakers through a range of strategies, such as specific programming strands dedicated to showcasing emerging talent, financial support through festival funds, providing visibility within the programme, exposure to international audiences and networking opportunities with industry professionals and other filmmakers. Furthermore, the films produced by the emerging women filmmakers revealed a strong focus on women.s perspectives and experiences, which were explored through the interweaving of particular aesthetic and cinematographic conventions.

Dengue fever viral exposure rates among blood donors during outbreaks in North Queensland

Introduction: Dengue poses a problem for safe transfusion of blood components with confirmed reports of transfusion-transmission in Hong Kong and Singapore. The largest outbreak in 50 years occurred in North Queensland during 2008/2009 with more than 1,000 confirmed cases in Cairns and Townsville. During this outbreak, supplementary questioning for all donors was implemented, and fresh components were not manufactured from at risk donors. We aim to determine the seroprevalence of dengue exposure in this population during this epidemic. Methods: Samples were collected from blood donors during the 2008/2009 epidemic and 3 months after the last confirmed case. These samples were tested for anti-Dengue IgM, IgG and NS1 antigen with commercially available ELISA based assay kits from PanBio. Results: Initial analyses revealed 2.7% of samples from deferred donors were IgM repeat reactive. Of these, 16% were also positive for anti-dengue IgG, while none of these were positive for the NS1 viral antigen. However, two NS1 positives were found in samples collected from deferred donors. Conclusions: This initial analysis represents recent and cumulative past exposure in a presumed asymptomatic population, and will provide documentation of the rate of asymptomatic dengue infection during the epidemic. This data can also be used to assess the risk of dengue becoming endemic in North Queensland given that the mosquito vector is established in this region.

Safety and efficacy of the combination of trastuzumab with docetaxel for HER2-positive women with advanced breast cancer : a review of the existing clinical trials and results of the expanded access programme in the UK

Trastuzumab is a humanised monoclonal antibody against the extracellular domain of HER2 (human epidermal growth factor receptor-2) that is overexpressed in about 25% of human breast cancers. It has shown clinical benefit in HER2-positive breast cancer cases when used alone or in combination with chemotherapy. Trastuzumab increases the response rate to chemotherapy and prolongs survival when used in combination with taxanes. In this article, we review the clinical trials where trastuzumab has been administered together with docetaxel, and we present the results of the trastuzumab expanded access programme (EAP) in the UK. Combination of trastuzumab with docetaxel results in similar response rates and time-to-progression with the trastuzumab/paclitaxel combinations. The toxicity of the combination and the risk of heart failure are low. The clinical data for the docetaxel/trastuzumab combination indicate a favourable profile from both the efficacy and the safety point of view and confirm the feasibility and safety of trastuzumab administration both as monotherapy and in combination with docetaxel. © 2004 Blackwell Publishing Ltd.