Australian Case Research Articles

Unlocking visual data to enhance the accuracy of AI-enabled mass valuation of urban houses: An Australian city case study

Despite earlier praises of hedonic price models (HPMs) in predicting the prices of residential properties, stakeholders in the property market have raised concerns regarding inaccuracy in automated valuation models (AVMs) using conventional HPMs. Furthermore, despite significant advancements in integrating artificial intelligence and image data into AVMs, research in the Australian context is absent. This paper investigates how image data capturing visual features of properties could enhance valuation accuracy using the data of actual sales of 34,399 properties from 2018 to 2020 across 128 urban suburbs in Brisbane, the third largest city in Australia. We develop a convolutional neural network model to extract visual features from large-scale data of 320,000 street-view and aerial-view images. We develop fusion models to integrate these additional visual features in HPMs. Using several experimental designs, our preferred fusion models generate a reduction of 28.35% in root-mean-square errors. Less predictive errors of AI-enabled AVMs through the use of visual data would enhance business confidence for AVMs’ end-users for investment, reporting, risk management, tax estimation, and urban planning purposes.

Critical thirding and third space collaboration: university professional staff and new type of knowledge production

In this article, the author first addresses the persisting knowledge invisibility of university professional staff by drawing on selected findings from their qualitative, multiple case study research conducted in an Australian university with a campus in Singapore. Analysing a selected case of a university project, the author applies critical thirding as a concept to demonstrate how university third space collaboration resulted in creating new, Mode 3 institutional knowledge and led to a transformative change of research commercialisation practices. The author then compares research findings from this selected Australian university case study to the insights from a systematic literature review which was conducted three years later as a separate research project using an international literature sample. The review provided evidence that since the 2000s university workers, professional and academic alike, in tertiary education institutions around the world, have been engaged in complex identity work, demonstrating increased agency towards de-invisibilisation of their roles and co-creating new knowledge, thereby contributing to university advancement. The author concludes that by applying the analytical power of critical thirding to social spaces of new knowledge production, it is possible to support and promote equal contributions of all university actors to achieving institutional goals.

Planning natural gas supply chain pathways for energy system decarbonisation: An Australian case study

The future role of natural gas systems in a deeply decarbonised world is very uncertain. This work seeks to characterise the changes that the clean energy transition is likely to induce in the natural gas chain, across extraction and transmission, distribution networks and gas consumption/use trends, for various scenarios with different demand and supply drivers. First, the results of a least-cost macro-scale energy system planning optimisation are explored to identify future natural gas demand and supply requirements. Second, those findings are used as inputs to a detailed analysis of the full gas supply chain, from extraction to final use, to examine the evolution of i) stored resource levels; ii) transmission and distribution networks operation and financing; and iii) required capacity and siting of gas generation; all, with a realistic account of the related infrastructure. Australia is investigated as a case study that relies on natural gas for both domestic and export purposes. Results project a shift towards a more localised gas consumption to be largely supplied by fewer basins, with associated potential transmission and extraction bottlenecks. They anticipate an overall less utilised, ageing distribution network with potential challenges to asset reliability and financing. Finally, they demonstrate both the scheduled and early retirement of fossil generation assets can allow the siting of considerable amounts of new gas power firming capacity on brownfield sites, thus offering an opportunity to reduce total system costs.

Optimising fisheries monitoring for rare and protected species: A south-eastern Australian case study shows low levels of interaction with a critically endangered species

Scientific observer programs are often the only means to estimate the total number and circumstances of interactions (including the life status at the time of the interaction) between commercial fisheries and threatened, endangered and protected species (TEPS). However, without estimating the precision of predefined sampling fractions, the accuracy of estimates are often poorly understood. We present a methodology to estimate appropriate sampling fractions using historical observer data from the New South Wales (Australia) ocean trap and line fishery, and implement an on-board monitoring program to estimate contemporary rates of interactions with TEPS in the fishery to evaluate the effectiveness of management measures implemented to reduce interactions. A total of 327 fishing trips (∼61,150 hook deployments) were sampled over 31 months with a single observed interaction each with the critically endangered grey nurse shark (Carcharius taurus) and scalloped hammerhead (Sphyrna lewini) recorded along with the capture of six seabirds. Observed catches included 97 species (70 finfish, 23 elasmobranchs, 1 invertebrate and 3 birds), of which 74 and 57 species were retained and discarded, respectively. Current fishing practices, combined with declines is reported effort targeting ‘large sharks’ following management reform, spatial protection measures, and gear regulations, were found to be minimising interactions between the main fishing method and TEPS. However, regular monitoring and research may be required to continually assess the effectiveness of mitigation strategies. The logic and methodology for determining appropriate sample fractions using existing data before implementing on-board sampling is relevant to the monitoring of other commercial fisheries.

Chaplains in Australian public schools? A matter of philanthropy

ABSTRACT This paper uses the case of chaplains in Australian public schools to construct a Foucauldian dispositif. In examining the interplay between discourse and material structures, we argue that the embedding of chaplaincy in public schooling is driven by economic rather than purely ideological discourse. We highlight the evolving social and political dynamics and the construction and regulation of knowledge and practices, demonstrating that philanthropy is central to student welfare provision in Australian public schools. Using excerpts from parliamentary debates in the Australian Federal Hansard, policy documents, case law, and Australian tax regulations, we identify significant political moments that position chaplains as critical welfare workers in public schools. This analysis underscores the subtle, often invisible power of philanthropy in sustaining and deeply embedding chaplaincy within public schools.

Investigating Patterns of Donor and Recipient Sports of Talent Transfer Paralympians.

Talent transfer has enabled elite athletes to be successful in another sport, with great potential in para-sport. Previous research suggests that similarities between donor and recipient sports may facilitate talent transfer; however, this remains unclear in para-sport. This study investigated patterns between donor and recipient sports' characteristics, identifying the impact on talent transfer in para-sport. An Australian case study utilizing secondary data of 38 Australian Paralympians who competed at the Paralympic Games from 2000 through 2020 was analyzed. Results demonstrated that similarities between sports were not significantly associated with successful talent transfers between Paralympic sports. Understanding patterns associated with successful Paralympic talent transfers offers a foundation of knowledge for designing and developing future talent-transfer pathways and research. Based on this study, it is recommended that sport administrators and practitioners explore greater opportunity for talent transfer in para-sport, rather than limiting talent-transfer opportunities based on athletes' donor sports.

Odour and indoor air quality hazards in railway cars: an Australian mixed methods case study

PurposeThis case study aimed to diagnose the cause(s) of a seasonal, and objectionable odour reported by travellers and drivers in the railway cars of Australian passenger trains. The research questions were to: (1) identify whether significant microbial colonisation was present within the air handling system of trains and causing the odours; to (2) identify other potential sources and; (3) remedial options for addressing the issue.MethodsA mixed-methods, action research design was used adopted. Sections of the heating, ventilation, and air conditioning (HVAC) systems from odour-affected trains were swabbed for bacteria and fungi and examined for evidence of wear, fatigue and damage on-site and off-site. Insulation foam material extracted from the walls of affected trains was also subjected to a chemical assessment following exposure to varying humidity and temperature conditions in a climate simulator. This was accompanied by a qualitative sensory characterisation.ResultsUpon exposure to a variety of simulated temperature and humidity combinations to recreate the odour, volatile chemical compounds released from the insulation foam by water were identified as its likely cause. In addition, a range of potentially serious pathogenic and odour-causing microbes were cultured from the HVAC systems, although it is considered unlikely that bacterial colonies were the odour source.ConclusionThe research has implications for the sanitising and maintenance policies for HVAC systems on public transport, especially when operating in humid environments. The sanitary imposition, especially in the wake of COVID-19 may be required to ensure the safety of the travelling public and drivers.

The role and impact of ChatGPT in educational practices: insights from an Australian higher education case study

Artificial intelligence (AI) tools, notably ChatGPT, are increasingly recognised for their transformative potential in higher education. This study employs a detailed case study approach complemented by a survey, delving into ChatGPT’s impact on pedagogical practices, student engagement, and academic performance. It involved 74 undergraduate and postgraduate students enrolled in data analytics courses in Australia. The quantitative analysis highlights ChatGPT’s role in providing personalised and on-demand support, which is highly valued among users for its flexibility and responsiveness, meeting a critical demand in educational settings. Notably, the study identifies a medium effect size (η2=0.173\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\eta ^2 = 0.173$$\\end{document}) in perceived benefits, indicating that ChatGPT accounts for approximately 17.3% of the variance in improved academic outcomes. However, challenges such as ChatGPT’s limited understanding of complex queries and the lack of human interactions are primary concerns, with a medium effect size (η2=0.289\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$\\eta ^2 = 0.289$$\\end{document}) suggesting significant areas for improvement. Furthermore, statistical analyses reveal a clear relationship between the frequency of ChatGPT usage and the perception of its benefits, underscoring the transformative potential for users who have integrated it into their academic practices. Despite these challenges, the differential impact on users versus non-users highlights the potential for ChatGPT to foster more engaging and effective educational practices. The findings advocate for targeted strategies to epitomise ChatGPT’s integration into educational settings, emphasising the need for ongoing research and the development of comprehensive guidelines to navigate its complexities and maximise its educational benefits.

Analysis of voltage limit‐induced barrier for connecting inverter‐based distributed generators to medium voltage networks: Australian case studies

AbstractInverter‐based distributed generators (IBDGs), mainly solar photovoltaic, connected in medium‐voltage (MV) networks cause challenges, such as voltage limit violations, for distribution network service providers (DNSPs), and require advanced network management strategies to mitigate these challenges. A theoretical analysis of the voltage limit‐induced barrier to IBDG connection and their export limits due to the change in network characteristics is imperative for developing new strategies. The authors formulated a relationship between the network equivalent impedance and the IBDG's connection point in the network and further explored the link between the network equivalent impedance and voltage magnitude due to the IBDG connection point. The authors also assessed the voltage limit‐induced barrier to IBDG connections in MV networks and proposed solutions to overcome issues with the dynamic export limit of IBDGs. Four representative Australian MV networks are analysed in DIgSILENT PowerFactory under different scenarios, such as variation in IBDG location and static and dynamic export limits. The authors found that an IBDG connected at the end of the network can achieve better performance in supporting the network voltage. An IBDG with a dynamic export limit can export three times more energy than the static export limit, which benefits both the DNSPs and IBDG owners.

Implementing 'Closing the Gap' policy through mainstream service provision: A South Australian case study.

The Australian government's 'Closing the Gap' (CTG) strategy has been implemented via multiple strategies. We examined CTG policy in early childhood within Southern Adelaide during the first decade of implementation (2008-2018) and critiqued the complexity and challenges of policy that is designed to promote health and well-being of Aboriginal and Torres Strait Islander children but lacked Aboriginal control. A qualitative case study was conducted in Southern Adelaide, and we interviewed 16 policy actors from health and early childhood education sectors. Thematic analysis revealed key themes to show how policy had been implemented through mainstream structures. The rapid roll out of the CTG strategy, the limitations of short-term funding, cuts to Aboriginal health services, tokenistic consultation, and the mainstreaming of service provision were key features of policy implementation. The influence of Aboriginal leaders varied across implementation contexts. Participants advocated for services in health and education that are culturally safe to improve health of children, families, and communities. The implementation of the CTG strategy in Southern Adelaide was rushed, complex, and lacking Aboriginal control. This contributed to the marginalisation of Aboriginal leaders, and disengagement of families and communities. A more collaborative and Aboriginal led process for policy implementation is essential to reform policy implementation and address health inequity. SO WHAT?: Findings from this study suggest that policy has continued to be implemented I ways that reflect colonial power imbalances. Alternative processes that promote the recognition of Indigenous rights must be considered if we are to achieve the targets set within the CTG strategy.

Improving the spatial and temporal resolution of burden of disease measures with Bayesian models

This paper contributes to the field by addressing the critical issue of enhancing the spatial and temporal resolution of health data. Although Bayesian methods are frequently employed to address this challenge in various disciplines, the application of Bayesian spatio-temporal models to burden of disease (BOD) studies remains limited. Our novelty lies in the exploration of two existing Bayesian models that we show to be applicable to a wide range of BOD data, including mortality and prevalence, thereby providing evidence to support the adoption of Bayesian modeling in full BOD studies in the future. We illustrate the benefits of Bayesian modeling with an Australian case study involving asthma and coronary heart disease. Our results showcase the effectiveness of Bayesian approaches in increasing the number of small areas for which results are available and improving the reliability and stability of the results compared to using data directly from surveys or administrative sources.

Influence of distal insertion technique, valve selection, and patient demographics on shunt survival in ventriculoperitoneal shunt insertion: A retrospective analysis of an Australian case series

BackgroundVentriculoperitoneal (VP) shunt insertion is a means of diverting cerebrospinal fluid (CSF) for management of hydrocephalus. Revision rates, operating time, and length of stay (LOS) following laparoscopic insertion of the distal catheter have been mixed. There are limited data on the role of adhesiolysis during VP shunt insertion. Valve characteristics have also been shown to influence patient outcomes. There is a paucity of Australian data reporting on the effect of these variables on shunt outcomes. We aimed to study patient demographics, indications, and surgical and instrument variables in the Australian context. MethodsWe performed a retrospective, multi-surgeon, single-centre analysis of VP shunts inserted in adults via an open or laparoscopic technique. Data on patient demographics and surgery characteristics were collected from the hospital medical records and the Australasian Shunt Registry. The primary outcome was shunt revision rate and secondary outcomes were postoperative complications, operating time and LOS, and shunt survivability. ResultsFifty-six participants were eligible for analysis. The overall revision rate was 14.3 %, which was lower than the national average. The distal catheter revision rate was 0 %. Laparoscopic insertion of the distal catheter was shown to significantly reduce operating time (70.4 min in the open group and 50.7 min in the laparoscopic group, p < 0.001). This was demonstrated across different aetiologies, and when controlling for age and valve-type (p < 0.05). The revision rate of non-programmable was higher than programmable valves (42.9 % versus 2.9 %, respectively). There were no differences between previous abdominal surgery, LOS, complication, or revision rate between open and laparoscopic insertion. VP shunt survivability was greater in the laparoscopic group (90-day shunt survival of 96.7 % and 92 % in the laparoscopy and open groups, respectively; p > 0.05). We did not find any significant difference in operating time or length of stay for age, sex, or previous abdominal surgery, even when accounting for surgical technique. Indication and shunt survivability varied widely between age groups. The use of laparoscopic insertion increased over time, though surgeons did not crossover techniques. ConclusionsThe overall distal revision rate of VP shunts is low. Laparoscopic insertion of the distal catheter reduces operating time and may improve shunt survivability. Larger studies are needed to confirm differences in shunt survivability in open versus laparoscopic distal catheter insertion, between age groups, clinical indications, and valve type on patient outcomes.

The process of co-designing a model of social prescribing: An Australian case study.

Social needs such as housing, employment, food, incomeand social isolation are having a significant impact on individuals, familiesand communities. Individuals are increasingly presenting to health settings with social needs, which are ill-equipped to address nonmedical needs. Social prescribing is a systematic approach connecting the health, social and community sectors to better address social needs and improve health and wellbeing. Social prescribing interventions are being implemented world-wide. With variability in health and social care systems internationally, it is important that social prescribing interventions are co-designed with key stakeholders to ensure they can be implemented and sustained within local systems. This Australian case study provides a detailed description of the process undertaken to co-design a social prescribing service model in a regional area. Four co-design workshops were undertaken, two with health and social care professionals and two with community members. The project followed an iterative process of resourcing, planning, recruiting, sensitising, facilitation, reflectionand building for change across the workshops. Through this process, key stakeholders were able to successfully co-design a social prescribing model of care for the region. By demonstrating the process and materials used in our project, we aim to open the 'black box' of co-design for social prescribing and provide ideas and resources for others to adapt and utilise. The project was designed and undertaken by a steering committee comprising university-based researchers (authors C. O. andS. B.), local government (author D. A.)and health, socialand community services (authors B. G., M. W., J. O.andS. R.). Members of the steering committee participated in project design, participant recruitment, workshopfacilitation, data analysisand interpretation.

Monitoring the impact of forest changes on carbon uptake with solar-induced fluorescence measurements from GOME-2A and TROPOMI for an Australian and Chinese case study

Abstract. Reliable and robust monitoring tools are crucial to assess the effectiveness of land mitigation techniques (LMTs) in enhancing carbon uptake, enabling informed decision making by policymakers. This study, addressing one of the scientific goals of the EU Horizon 2020 Land Use Based Mitigation for Resilient Climate Pathways (LANDMARC) project, examines the feasibility of using satellite solar-induced fluorescence (SIF) in combination with other satellite data as a monitoring proxy to evaluate the effects of LMTs on carbon uptake. Two distinct cases are explored: (1) instantaneous vegetation destruction caused by a 2019 eucalyptus wildfire in southeast Australia and (2) gradual forest gain resulting from reforestation efforts in northern China in 2007–2012. The cases are monitored using SIF from the TROPOspheric Monitoring Instrument (TROPOMI) and Global Ozone Monitoring Experiment-2A (GOME-2A), respectively. Comparing the temporal variability in SIF across the affected areas and nearby reference areas reveals that vegetation dynamics changed as a consequence of the land-use changes in both cases. Specifically, in the Australia case, TROPOMI demonstrated an immediate reduction in the SIF signal of 0.6 mW m−2 sr−1 nm−1 (−72 %) over the eucalypt forest right after the fire. Exploiting the strong correspondence between TROPOMI SIF and gross primary productivity (GPP) at the nearby representative eddy covariance Tumbarumba site and through the FluxSat product, we estimate that the Australian fire led to a loss in GPP of 130–200 GgC in the first 8 months after the fire. Over the northern Chinese provinces of Gansu, Shaanxi, Sichuan, Chongqing, and Shanxi, we report an increase in GOME-2A summertime SIF of 0.1–0.2 mW m−2 sr−1 nm−1, coinciding with reforestation efforts between 2007 and 2012. This increase in the SIF signal is likely driven by a combination of increasingly favourable natural conditions and by the reforestation effort itself. A multivariate model that takes into account growth factors such as water availability and maximum temperature as well as satellite-derived forest-cover data explains the observed variability in GOME-2A SIF in the Chinese case reasonably well (R2=0.72). The model suggests that increases in both forest cover and soil moisture have led, in step, to the observed increase in vegetation activity over northern China. In that region, for every 100 km2 of additional forest cover, SIF increases by 0.1 mW m−2 sr−1 nm−1 between 2007 and 2012. Our study highlights that the use of satellite-based SIF, together with supporting in situ, modelled, and satellite data, allows us to monitor the impact of LMT implementation on regional carbon uptake as long as the scale of the LMT is of sufficient spatial extent.

Disciplining subjectivity in Australian migrant deterrence campaigns

Abstract This article examines public information campaigns designed to deter asylum seekers from entering Australia via boat. Through analysing the institutional context and content of a graphic novel that was circulated within Afghan Hazara communities in 2014, I show that certain Australian public information campaigns mobilize an ethos of cultural sensitivity rooted in ethnographic data-gathering projects that reinscribe migrants as ignorant and socially deviant subjects. Such campaigns both situate Australia as an impossible destination and render migration a dangerous, futile act that will bring further misfortune to migrants’ families. The Australian case shows that in contexts where cultural sensitivity and externalized border control simultaneously guide migration policy, cultural knowledge becomes weaponized not only to keep migrants immobile but also to discipline migrant subjectivity and ultimately exclude them from pathways to refuge.

Local government policymaking environment for Health in All Policies: a case study research investigation

ABSTRACT The local level of government is identified as being well placed to address the determinants of health due to their flatter governance structure and proximity to the community. Research has identified multiple factors that influence local governments to act on these health determinants, although few have applied theories of the policy process to understand the policymaking environment. Using two Australian local government case study sites, we explored the policymaking environment regarding policy decisions to address health determinants using the lens of four theories of the policy process. We conducted 20 interviews and one focus group with elected members and staff in local government, along with an analysis of 12 policy documents and participation in a policy reference group. Following thematic analysis, 13 factors influencing policy addressing health determinants were identified, mostly confirming previous research from within Australia and globally. New themes have emerged regarding the limited range of policy actors involved and the lack of advocacy, particularly by community or media, who have an identified influence over decision-making in a local government context. Applying theories of the policy process also demonstrates how they can be used to add meaning to the interconnectedness of influences in unique local government policymaking environments.

Using teachers’ prior knowledge as the foundation for collaborative policy development: an Australian case study

ABSTRACT Too often international policies, such as the OECD PISA Global Competence framework, are incorporated into domestic education policies without consultation with school leaders or classrooms teachers. This “top down” approach means the educators are often obliged to implement policies they may not fully understand or have the professional learning to implement successfully. This paper draws from research that explored an alternative approach where a group of Australian school leaders and classroom teachers were provided with the opportunity to collaboratively translate the PISA Framework into a state-based, whole-school approach. The paper reports particularly on the results of a survey, undertaken prior to the commencement of this collaboration, to identify the participants’ existing conceptualizations of global competence. The survey questions and data analysis framed by Keltchermans’ Personal Interpretive Framework explored how the participants’ conceptualizations were shaped by their personal beliefs and contexts. Data gathered showed alignment between the teachers’ conceptualizations, their known pedagogical frameworks, and the Australian Curriculum, particularly the general capabilities and the cross-curriculum priority of Sustainability. This acts as a reminder of the need to ensure that policy is reflective of its context and developed from the ground up, even if it is developed in response to international initiatives.

Is it time to move on from ‘Mr Big’? Scenario evidence and the risk of unreliable confessions in Australia

The ‘Mr Big’ method is a non-custodial investigative method used by police forces worldwide. A Mr Big operation involves an undercover operation in which a person suspected of involvement in an indictable offence, is unknowingly drawn into a fictitious criminal enterprise, in order to elicit a confession. There are ample concerns around the use of this method. Consequently, courts around the world have grappled with the admissibility of the confession evidence gathered through this approach. This article will first provide an outline of the Mr Big method. Following this, it will discuss the psychological explanation of associated potential coerced confessions which are unreliable. Additionally, various Australian cases and court rulings on confessions obtained using this approach will be described. This information will then be used, given the concerns indicated by psychological research and foreign court responses, in an attempt to address the question of whether the Mr Big method should have a place within the Australian legal system.

Valuing and integrating soil roles in assessing the capital dimension of soil security: An Australian case study

The crucial role of soil in global food production and its multifaceted contributions to ecosystem services underscore the need for a comprehensive evaluation framework. This study presents a novel approach to soil evaluation by integrating the assessment of soil functions, services, and threats into a unified metric which quantifies the capital dimension which is termed "soil management capital". To achieve this, we focused on three key roles: a threat, evaluated by the pH regulation costs, factoring in different buffering capacities and liming/sulphuring treatments to attain an optimal reference pH, a function, representing soil's role as a reservoir and regulator of nutrients; and a service, considering available water holding capacity (AWC) for water security. Integrating these activities culminates in a soil capital metric, providing a comprehensive understanding of the soil's economic value in US$/ha units on a pixel-by-pixel basis across Australia. To achieve this, we analysed spatial information from the Soil and Landscape Grid of Australia (SLGA) with Google Earth Engine (GEE). Our study generated detailed maps illustrating pH regulation costs, OC, nutrients (N, P, K), and AWC across Australia. The integration of these roles revealed regions of large soil capital in the Australian eastern coast and Tasmania.

Mind the gap, exploring the expectation gap in political leadership in disasters: An Australian case study

AbstractThis article uses expectation gap theory to explore news coverage of the leadership performance of a national political leader in a major bushfire disaster in Australia. It does so to identify the types of behaviors and leadership that leader enacted and embodied during these events and what fire‐affected communities expected that politician to do in that disaster. Using a case study approach to the Black Summer bushfires that occurred in Australia in late 2019 and early 2020, it highlights the way Australia's Prime Minister Scott Morrison engaged with affected individuals and communities during and after that disaster. We draw on news media coverage as the disaster unfolded and in the months that followed to analyze his leadership and what others expected of him in those events. We find that in this disaster there was a significant gap between the Australian Prime Minister's leadership and community expectations of that leadership. Our article highlights how the expectation gap played out in news coverage of the fires and why the expectation gap matters.