Perth Metropolitan Area Research Articles

Maternal Breast Growth and Body Mass Index Are Associated with Low Milk Production in Women.

Maternal breast volume is determined by the quantity of glandular and adipose tissue, and it undergoes significant changes during pregnancy. These changes are intricately linked to the development of glandular tissue, which most likely reflects lactation capacity. Evidence indicates that women with overweight or obesity exhibit larger breast volume compared to those with a normal body mass index (BMI), emphasizing the close relationship between breast volume and maternal adiposity. Hence, we aim to investigate breast volume growth and maternal BMI as potential risk factors for low milk production. Lactating women (n = 609) from the Perth metropolitan area in Western Australia between 2011 and 2023 were included in the analysis. Twenty-four-hour milk production measurements were conducted using the test weighing method, and milk removal frequencies were recorded. Mothers completed questionnaires regarding demographic, obstetric and infant details. Linear and logistic regression models were used to determine maternal and infant factors associated with milk production. Here we show that increasing maternal age and BMI are associated with low milk production. Moreover, larger pre-pregnancy breast volume and breast growth are associated with both higher BMI and milk production. Women who are older, have an obese BMI and who have minimal pre-pregnancy breast volume and breast growth should be provided with antenatal screening and breastfeeding support as they are more likely to experience low milk production.

Putting down roots: Relationships between urban forests and residents’ place attachment

Many cities seek to improve their urban forests to provide a diverse range of benefits for residents. One of these potential benefits, place attachment, is linked with its own positive outcomes including increased social cohesion, life satisfaction, and environmentally-friendly behaviour. However, it is currently unclear how urban forests relate to place attachment. This case study sought to clarify that relationship. A survey measuring residents’ place attachment, satisfaction/dissatisfaction with urban forest services/disservices respectively, perceived urban forest characteristics, and sociodemographic variables was distributed to residents of the Perth Metropolitan Area in Western Australia. The survey measured these variables at three spatial scales: residents’ homes, streets, and neighbourhoods. The 638 responses were combined with GIS datasets to calculate objective measures of average canopy cover. SEM was used to test relationships between different groups of variables and understand their relationship with place attachment. We found that place attachment was positively associated with residents’ satisfaction with key urban forest services: sense of place, social interactions encouraged by the trees, and fresh air. In turn, place attachment and satisfaction with services were associated with objective canopy cover, both directly and indirectly via perceived characteristics. An analysis of qualitative feedback from residents helped to illustrate nuances around how urban trees relate to sense of place and how the loss of trees can be a source of distress and solastalgia. As such, we recommend that actual and perceived urban forest characteristics, residents’ agency, and tree removal be adequately considered in efforts to maximise urban forest benefits.

Soil health and carbon storage in community gardens in the Perth metropolitan area, Australia

AbstractCommunity gardens, as common spaces where people gather to grow food, help foster public health, greener urban environments, life‐long learning and vibrant communities. However, despite being promoted as sustainable horticulture and conservation agriculture, their soil health and carbon (C) sequestration potential, with implication for climate change mitigation, remains underexplored. This study assessed soil samples collected from raised beds (gardening area) and adjacent bare ground (control) at six community gardens in the Perth metropolitan area, Australia. These sites covered three soil mapping units (SMUs): calcareous deep sands, coloured sand and pale sands The soil in raised beds exhibited superior characteristics than surrounding urban soil including lower bulk density, higher pH buffering capacity, available nutrients including nitrogen (N), phosphorus (P) and potassium (K), cation exchange capacity (CEC), total C and microbial biomass. Notably, we estimated that raised bed soils accumulated significant levels of C in the top 10 cm layer (0.55 kg/m2 or 5.5 T/ha). Our findings also indicate no significant heavy metal contamination in any of the community garden soils. Although the global area of community gardens is marginally small, these results suggest they hold potential for carbon sequestration, especially in urban and peri‐urban environments. The improved soil health and C storage potential in community garden soil are largely attributed to the regular application of compost produced within the community gardens.

Capitalised nonmarket benefits of multifunctional water‐sensitive urban infrastructure: A case of living streams

AbstractLiving streams are an important element of decentralised stormwater management solutions. They are actively promoted due to their ability to generate multiple ecosystem services, including water quality improvement, biodiversity protection and aesthetics. However, a lack of monetised values of ecosystem services of living stream projects makes it difficult to assess the net benefits of investing in such projects. This study uses the hedonic pricing method to estimate the capitalised amenity values of living streams and other public open spaces (POS) in housing and lot markets for the first time. The study area includes two newly greenfield‐developed suburbs in the Perth metropolitan area. We find the positive impact of living streams and other POS on the house and lot prices. However, living streams generate greater value than other types of POS. Furthermore, the POS (including living streams) that support active recreation are valued more than basic POS without active recreation features. Finally, we observe, for the first time, that the benefits of planned but not yet constructed POS (including living stream) are similar to the completed POS (including living stream) in both housing and lot markets. This information is useful for policymakers and developers making informed decisions about water‐sensitive urban infrastructure.

“I just get scared it’s going to happen again”: a qualitative study of the psychosocial impact of pediatric burns from the child’s perspective

BackgroundAdvances in medicine have improved the chances of survival following burn injuries, however, psychosocial outcomes have not seen the same improvement, and burn injuries can be distressing for both the child or young person, negatively affecting their wellbeing. Pediatric burn patients are at a higher risk of developing psychopathology compared to the general population. In order to promote resilience and prevent psychopathology post-burn injury for pediatric burn patients, it is crucial to understand the experience of children and young people after a burn. This study aimed to understand the psychosocial impact that a pediatric burn has as perceived by the pediatric burn patient.MethodsSeven pediatric burn patients were interviewed from the Perth Metropolitan area on average 3.1 years after their injury. All participants had been admitted to hospital for their acute injury and stayed for a median length of 2 days in hospital. Interviews with pediatric patients took place online, and the patients were asked about their mental health, coping strategies, changes to lifestyle and supports following their burn injury. The interviews were transcribed and then thematically analysed using an inductive approach.ResultsThree overarching themes were developed from the interviews: burn-specific impact on the child or young person (including appearance concerns, family factors, and lifestyle factors), the psychological impact (including positive and negative impact on mental health), and factors supporting the recovery journey (including coping strategies and support services). The participants in our study highlighted issues they faced during recovery, the positive and negative impacts of the injury and recovery process and provided suggestions for future opportunities to bolster resilience and promote growth for pediatric burn patients who may face similar challenges in the future.ConclusionFactors that improve the mental health and wellbeing of pediatric burn patients should be promoted, such as mental health and social supports, the promotion of adaptive coping mechanisms, and meeting the needs of the family unit as a whole. Ultimately, the implementation of trauma-focused, family centred interventions is crucial for the psychosocial recovery of pediatric burn survivors.

A Survey Study on Clinicians' Rationale and Attitude Towards the Prescription of Antipsychotic Polypharmacy in the East Perth Metropolitan Area in Western Australia.

Objective Patients challenging refractory and residual psychotic symptoms have led to the concomitant use of combined antipsychotics, which was later introduced and labelled 'antipsychotic polypharmacy' (APP). Many clinicians have become somewhat hesitant to adjust psychotropic medication dosages, resulting in a higher dose and combination prescription of antipsychotics and only achieving modest success. This study examines and investigates clinician perspectives and the rationale for the prescription of antipsychotic polypharmacy. Methods A structured questionnaire designed to reflect 15 target-directed questions evaluating clinicians' attitudes and rationale on antipsychotic polypharmacy prescription was administered from November to December 2022. Information was obtained from inpatient and outpatient prescribers (psychiatric consultants) in two government-funded psychiatric facilities and outpatient clinics in the East Perth Metropolitan Area in Western Australia. Results After exclusion, a total of 45 participants' responses were analysed. These results suggest a higher frequency of questions relating to the prescription of APP based on previous prescribers' consultation and recommendation from a prior treating team; senior nurses' pressure impacting clinicians' decisions on APP perception; and the patient's risk of aggression impacting the clinician's rationale for the prescription of APP. Conclusions Clinicians' rationale and attitude towards the prescription of APP are mostly influenced by recommendations from prior treatment teams or consultations and patients' risk for aggression without compromising practice guidelines. Our findings also highlight the need to evaluate prescribers' attitudes and how it presents an opportunity to enhance patients' holistic outcomes.

Conceptualising Wellbeing for Australian Aboriginal LGBTQA+ Young People

It is likely that young people who are both Aboriginal and Torres Strait Islander and LGBTQA+ would be at increased risk for poor mental health outcomes due to the layered impacts of discrimination they experience; however, there is very little empirical evidence focused on the mental health and wellbeing of Aboriginal and Torres Strait Islander LGBTQA+ young people. The current study represents a qualitative exploration of wellbeing among Aboriginal LGBTQA+ young people. This study consisted of semi-structured interviews and focus groups with Aboriginal LGBTQA+ young people aged 14–25 years old in the Perth metropolitan area of Western Australia. Thematic analysis identified seven major themes that were significant to participants’ wellbeing: identity, family, community, visibility, services, stigma and navigating.

Dialogic Drawing: A Method for Researching Abstract Phenomenon in Early Childhood

Abstract This article explores the theoretical, ethical, and practical opportunities and constraints considered in the methodological design and use of Dialogic Drawing, a participatory method for accessing qualitative data with young children. The method was designed to gather data about abstract phenomena from young children, as part of a larger study investigating the impact of discursive affordances in the first year of compulsory school in Western Australia. Methodological findings are reported from the application of Dialogic Drawing with 28 five-year-old children from diverse school-based semiotic landscapes in the Perth metropolitan area in Western Australia. Three strands of analysis are described and critiqued: drawn product, drawing process, and approach to drawing. Thematic analysis of drawn visual schema, dialog and embodied behaviours highlights the potential reach of Dialogic Drawing for interdisciplinary research significant to early childhood. The participating children revealed they perceive drawing as the child’s domain, endorsing Dialogic Drawing as a relevant and accessible method with capacity to gain untapped information significant to qualitative researchers seeking to elicit the authentic perspectives of children.

Long-term exposure to low air pollutant concentrations and hospitalisation for respiratory diseases in older men: A prospective cohort study in Perth, Australia

BackgroundAcute exposure to ambient air pollution even at low concentrations has been associated with increased hospitalisation for respiratory diseases but the effects of long-term exposure are less certain. In this study, we investigated the associations between long-term exposures to PM2.5, PM2.5 absorbance and NO2 and hospitalisation for asthma, chronic obstructive pulmonary disease and pneumonia in a cohort of older men living in Perth, Western Australia, a city where the levels of air pollutants are well below the world standards. Materials and methodsThe study population of 11,156 men with no prior hospitalisation for respiratory disease was drawn from the Health in Men Study (HIMS) cohort of men aged >65 years living in Perth, Western Australia between 1996-1999. PM2.5, PM2.5 absorbance (PM2.5a) and NO2 were measured across the Perth metropolitan area over three seasons in 2012. Land use regression (LUR) models were used to estimate annual concentrations of PM2.5, PM2.5 absorbance and NO2 at the residential address of each participant from inception (1996) to 2015. Hospitalisation for respiratory disease between inception and 2015 was ascertained using the Western Australian Data Linkage System. The association between exposure to air pollution with hospitalisation for respiratory disease was examined using Cox regression analysis. ResultsNo statistically significant associations were observed in the fully adjusted models. However, positive associations were observed with first hospitalisation for pneumonia (HR 1.08, 95% CI: 1.01–1.16) when adjusted for age, year of enrolment, smoking status, education, BMI and physical activity. ConclusionsIn this longitudinal study of older men we found no evidence of associations between increased long-term exposure to low-level air pollution with increased risk of hospitalisation for respiratory diseases in Perth, Australia. More studies on respiratory morbidity associated with exposure to low levels of air pollution are needed for more comprehensive understanding of the overall risk.

Spillover of a Tobamovirus from the Australian Indigenous Flora to Invasive Weeds.

The tobamovirus yellow tailflower mild mottle virus (YTMMV) was previously reported in wild plants of Anthocercis species (family Solanaceae) and other solanaceous indigenous species growing in natural habitats in Western Australia. Here, we undertook a survey of two introduced solanaceous weeds, namely Solanum nigrum (black nightshade) and Physalis peruviana (cape gooseberry) in the Perth metropolitan area and surrounds to determine if YTMMV has spread naturally to these species. At a remnant natural bushland site where both solanaceous weeds and indigenous Anthocercis hosts grew adjacent to one another, a proportion of S. nigrum and P. peruviana plants were asymptomatically-infected with YTMMV, confirming spillover had occurred. Populations of S. nigrum also grow as weeds in parts of the city isolated from remnant bushland and indigenous sources of YTMMV, and some of these populations were also infected with YTMMV. Fruit was harvested from virus-infected wild S. nigrum plants and the seed germinated under controlled conditions. Up to 80% of resultant seedlings derived from infected parent plants were infected with YTMMV, confirming that the virus is vertically-transmitted in S. nigrum, and therefore infection appears to be self-sustaining in this species. This is the first report of spillover of YTMMV to exotic weeds, and of vertical transmission of this tobamovirus. We discuss the roles of vertical and horizontal transmission in this spillover event, and its implications for biosecurity.

A balancing act: Biodiversity and human wellbeing considerations in the management of urban forest in a global biodiversity hotspot

Environmental and urban forest managers in cities located in highly biodiverse regions may need to balance biodiversity conservation with the provision of ecosystem services to people. However, striking this balance is not easy and many competing factors influence the decision-making process. Set in the Perth Metropolitan Area, located in the global biodiversity hotspot of the Southwestern Australia Floristic Province, this study aimed to understand: (i) the extent to which a benefits-oriented approach is used by local governments to optimise biodiversity and human wellbeing urban forest outcomes, and (ii) what other factors influence the decision-making process shaping urban forest composition. Using a social-ecological framework, we conducted semi-structured interviews with 29 local government practitioners. We found that biodiversity conservation is actively considered in the planning and management of urban forest in natural areas and parks, but rarely in streetscapes. Maximising shade and cooling, and to a lesser extent enhancing sense of place, were the key benefits actively sought in streetscapes. Parks appeared to straddle the middle ground as areas with most flexibility to accommodate multiple biodiversity and human wellbeing benefits. Yet, benefits were only some of a multitude of social-ecological factors influencing the decision-making process shaping urban forest composition. In particular, streetscapes were affected by a large number of social and political factors (e.g., perceived risk and nuisance, ad-hoc decisions by elected members), many of them leading to suboptimal urban forest outcomes. For a benefits-oriented approach to prevail in complex and contested urban spaces it is important that the decision-making process is evidence-informed and capable of handling the challenges and conflicts that are likely to arise. Reactive decision-making results in a conservative, “safe” species palette that over time defines streetscapes by what they do not do (creating disservices) rather than what they do (delivering multiple biodiversity and wellbeing benefits), which ultimately is not a desired outcome in the context of an increasingly urbanized world.

Greening urban road verges highlights diverse views of multiple stakeholders on ecosystem service provision, challenges and preferred form

Globally, there is growing recognition of the potential of road verges to contribute to urban greening and ecosystem service provision, beyond their original functions of utility provision and public access. Numerous, diverse stakeholders are involved in their management, yet their shared and diverging perspectives on verge greening are poorly understood. This research examined the perspectives on road verge greening by 30 respondents from eight stakeholder groups from the Perth Metropolitan Area, Australia. Stakeholders spanned local and state governments, developers, peak bodies, utility providers, environmental consultants, verge treatment providers and urban greening advocates. Semi-directed interviews and Likert scales were used to assess respondents' perspectives and perceived importance of urban verge functions and ecosystem services, risks and challenges associated with verge greening, and preferred verge vegetation composition. The most important ecosystem services for all stakeholders were temperature regulation (through the provision of street trees), those associated with water management and aesthetically interesting streetscapes. Perceived challenges included limited knowledge for the management of native species verges and streetscapes, organisational costs for verge managers and utility providers, and the need to engage with multiple local government authorities with widely varying management and financial valuation of verge vegetation. Stakeholders’ preferred verge reflected diverse uses, local characteristics, and was climate and water resilient (particularly ‘waterwise’). A majority of stakeholder groups felt greater attention to the ‘understorey’ of the ‘urban forest’ was warranted. An emerging perspective across four stakeholder groups identified the potential for verges to grow a local ‘sense of place’, through plantings emphasising local native species and highlighting local Whadjuk Noongar seasons. These findings support policies and programmes associated with urban greening, and assist in navigating the contestation often associated with new or transformative uses of land at the public-private interface.

The attributes of social resilience: understanding refugeesʼ housing choices

The current literature on migrantsʼ housing experience in Australia and internationally often uses spatial and economic conditions of disadvantage and adverse personal circumstances to frame the description of migrantsʼ resettlement. Even when using positive frameworks, such as inclusion and integration, the focus is on the lack of resources and support. This article uses the conceptual lens of resilience as an alternative framework for describing migrantsʼ resettlement experience. Using the case study of the Sudanese refugees living in the metropolitan area of Perth, Western Australia, this article describes the settlement process from the migrantsʼ perspective, discussing the link between settlement processes and the housing choices of migrants with a refugee background, using the concept of resilience. In particular, the article focuses on the external triggers that ignite, support and strengthen the different components of the migrantsʼ resilience. These triggers are defined as ‘attributes of resilienceʼ. The study identified four attributes of social resilience applicable and relevant to the housing choices and settlement patterns of the Sudanese refugee migrants settled in Perth. These are: knowledge, skills and learning; community networks; people–place connections; and community infrastructures. The article illustrates how the attributes assisted these migrants in developing tools and mechanisms to build new opportunities and negotiate and access suitable housing opportunities. The findings presented in this article stress the need, within the resettlement experience, to consider housing issues outside the simple provision of affordable and appropriate dwellings, including recognising the relationship between social and spatial domains.

Lessons learned from the use of rotenone to eradicate feral fish in two irrigation lakes in Western Australia

SummaryAn eradication program using rotenone was implemented primarily targeting a localised population of the feral Pearl Cichlid (Geophagus brasiliensis), and as a secondary objective to also remove the widespread Eastern Gambusia (Gambusia holbrooki) in two artificial lakes used for irrigation purposes in Byford, Western Australia (WA). Rotenone, applied at the approved rate (i.e. 0.25 ppm), failed to eradicate all Eastern Gambusia, and possibly all of the Pearl Cichlids in the first attempt, but at a higher dose rate (i.e. 1 ppm) it eradicated both species on the second attempt. We attributed the initial failure partially to the low dose rate of rotenone approved by the Australian Pesticides and Veterinary Medicines Authority (APVMA). Pearl Cichlids are present in multiple public ponds and lakes, and waterways in the greater Perth metropolitan area (www.abc.net.au/news/2012‐06‐27/feral‐fish‐overtake‐wa‐native‐species/4096580), and needs to be more aggressively managed by the Department of Primary Industries and Regional Development (DPIRD).

A comparative study of AC and DC public electric vehicle charging station usage in Western Australia

DC fast-charging stations can charge an electric vehicle several times faster than Level 2 AC charging stations. Using a network of DC charging stations, it becomes possible to travel in electric vehicles for long-distance, cross-country driving with only short recharging stops. This paper examines and compares typical customer usage patterns at DC fast-charging stations (50 kW) against Level 2 AC charging stations (7 kW) to study the benefits of transitioning to DC charging for Western Australia. It includes data collected from The University of Western Australia’s AC and DC charging network in the Perth metropolitan area and stations along the highway connecting Perth to Augusta in the rural South West of Western Australia (over 300 km apart). A cost model is drawn up to calculate the local operating cost and break-even requirement across several different styles of charging stations. User behaviour and the adoption of certain charging infrastructures are crucial for the general uptake of electric vehicles. Notwithstanding, national electric vehicle charging standards and infrastructure availability have a fundamental influence on the electrification of transport.

Street Verge in Transition: A Study of Community Drivers and Local Policy Setting for Urban Greening in Perth, Western Australia

The United Nations’ Sustainable Development Goals (SDGs) are regarded as the key policy agenda for national, regional, and local government to combat climate change impacts and promote sustainable development. For example, in Perth and Peel metropolitan area, the capital city of Western Australia, there has been a shift of policy setting from that of a sprawling city to a denser city, while maintaining and promoting its ecosystem services and achieving sustainable city goals. Residential verge gardens have been widely adopted in recent years by communities and local governments in the Perth metropolitan area. This study reviews the motivations and drivers for the uptake of verge gardens in metropolitan suburbs and identifies potential policy responses. The City of Bayswater local government area was surveyed for this research. The study considers a mixed-methods approach, including site auditing and a questionnaire survey for local residents who have transformed their verges. A total of 534 verge gardens were audited on residential lots, and 166 valid questionnaire responses were received from residents. The site-audit of the verge gardens in Bayswater found that native vegetation is the dominant verge garden of choice, followed by the ornamental garden, with food production (plants/vegetables) seeming to be the least popular option. Regarding the motivations and drivers, the study has found that social (e.g., aesthetics, flowers, social interactions, and social mimicry), environmental (e.g., attracting wildlife and birds and environmental practice waterwise garden), and personal (easy maintenance) drivers are the primary motivators for residents to adopt verge gardens. Whilst the on-ground surveys were prior to COVID-19, the article includes how this topic could relate to pandemic-resilient urban spaces. As local governments look towards supporting the sustainable outcome goals, the observations of this study will be helpful for developing local government policy and community programs in the promotion and uptake of verge gardens in Australian cities.

Older women's perceptions of the impact of homelessness on their health needs and their ability to access healthcare

ObjectiveThis study explored the healthcare needs and barriers to health services in older homeless women in the Perth metropolitan area, Western Australia. MethodsTwenty‐two older women experiencing homelessness completed a questionnaire and semi‐structured interview. Data were analysed using descriptive statistics and thematic analysis. ResultsThe study highlighted that these women had complex and inter‐related issues that affected their health. The nine major themes that emerged from the interview data consisted of: safe accommodation; financial insecurity; experience of trauma and abuse; stigma, embarrassment and fear of being judged; the health impact of not fulfilling their role as family nurturer; mental health; complex interaction of physical and mental health issues; healthcare costs; and the need for ongoing psychosocial and healthcare support once housed. ConclusionProvision of safe and secure accommodation is pivotal to women's health, as is the need for greater understanding of the impact of poverty, women's traditional roles, social disconnection and domestic violence, and ongoing access to healthcare and support services. Implications for public healthA structural and systemic approach based on a social determinants of health framework is required to address the health needs of the increasing numbers of older women becoming homeless in this country.

Trends in out-of-hospital cardiac arrest incidence, patient characteristics and survival over 18 years in Perth, Western Australia

ObjectivesTo investigate trends in the incidence, characteristics, and survival of out-of-hospital cardiac arrests (OHCA) in the Perth metropolitan area between 2001 and 2018. MethodsWe calculated the crude incidence rate, age-standardised incidence rate (ASIR) and age- and sex-specific incidence rates (per 100,000 population) for OHCA of presumed cardiac aetiology. ASIRs were calculated using the direct method of standardisation using the 2001 Australian Population standard. Survival was assessed at return of spontaneous circulation at emergency department arrival and at 30 days. Temporal trends in patient and arrest characteristics were assessed with logistic regression, while trends in incidence were assessed using Joinpoint regression. Survival trends were assessed using binary logistic regression. ResultsA total of 18,417 OHCAs of presumed cardiac aetiology were attended by emergency medical services in Perth between 2001 and 2018. Overall, there were no significant changes in the crude or ASIR of OHCA over the study period, although OHCA incidence in 15–39 year-old males increased by 12.5% annually between 2011 and 2018. Both bystander cardiopulmonary resuscitation and bystander defibrillation increased over the study period, while the proportion of shockable arrests declined. Thirty-day OHCA survival improved significantly over time, with the odds of survival (in bystander-witnessed, initial shockable rhythm arrests) improving 12% (95% CI, 9.0% to 14.0%) annually, from 8.4% in 2001 to 44.0% in 2018. ConclusionOverall, there were no significant trends in OHCA incidence over the study period, although arrests in 15–39 year-old males increased significantly after 2011. There were significant improvements in 30-day survival between 2001 and 2018.

Ambient seismic noise in an urban environment: case study using downhole distributed acoustic sensors at the Curtin University campus in Perth, Western Australia

Distributed acoustic sensing (DAS) is an emerging technology increasingly employed to monitor changes of formation properties, production noise and micro-seismic activity, and as an array of sensors in active seismic surveys. The data recorded with the DAS systems are very rich; some features observed in DAS records are often not well understood, and thus are underutilised. A systematic analysis of the data recorded passively with a DAS system in a 900-m deep well over a period of 12 weeks in the Perth metropolitan area, Western Australia, reveals the presence of several types of ambient energy in the subsurface, such as earthquakes, ocean swell and urban noise. In particular, over 85 days of the experiment, the analysis detected sixteen earthquakes, with epicentres ranging from 126 km to 900 km (for the local events) and from 2300 km to 6400 km (for the remote events). Signals with frequencies below 0.9 Hz are dominated by the oceanic swell. The recorded urban noise includes mine blasting, machinery and traffic. The experiment shows the ability of DAS to detect these events and as such is potentially useful for subsurface characterisation and monitoring.

Negative reviews online: an exploratory analysis of patient complaints about dental services in Western Australia.

Rates of online reviews are continually increasing. Coinciding with this, is the beneficial abundance of subjective information that is now available to patients. Such information can be persuasive in selecting a healthcare provider. This analysis of one-and-two-star Google reviews received by dental practices within the Perth metropolitan region aims to identify common themes within dental practice complaints. This mixed-methods study was conducted by gathering reviews from the 'Google review' feature, which have been published by users between 2013 and 2020. These data were then coded into recognised themes, and crucial quotes were selected and de-identified creating a narrative about the themes present which formed the qualitative component of this research. A total of 413 negative reviews were included in this study. From these, 1071 specific complaints were identified. Major themes identified included treatment issues, staffing, communication and professionalism, finance, and premise. Spread across these five themes were an additional thirty-eight subthemes. Overall, treatment was a primary concern for patients, making up 37.1% of the results. Within the subthemes 'treatment dissatisfaction (unspecified)' was also high, at 23.1%. This study identified the most common complaints received by dental clinics on Google review within the Perth metropolitan area. Further investigation is required to provide supplementary data regarding factors that may influence complaint rates and types, such as the socio-economic status of areas and geographical factors such as distance from the Perth metropolitan.