Publications by authors named "Liam Smith"

We introduce a class of 2D sigma models which are parametrized by a function of one variable. In addition to the physical field g, these models include an auxiliary field v_{α} which mediates interactions in a prescribed way. We prove that every theory in this family is classically integrable, in that it possesses an infinite set of conserved charges in involution, which can be constructed from a Lax representation for the equations of motion.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the risk of allergic reactions in individuals labeled with penicillin allergy when undergoing direct penicillin challenges, aiming to understand the frequency and factors influencing these reactions.
  • A meta-analysis of 56 studies with nearly 9,225 participants found that only 3.5% experienced allergic reactions, indicating a relatively low frequency for those with a penicillin allergy label.
  • Results suggested lower reaction rates in North America compared to other regions, and higher risk in children and outpatient settings, highlighting the importance of context in evaluating allergy responses.
View Article and Find Full Text PDF

Communities have a strong role in protecting biodiversity. In addition to participation in restoration, a range of actions in the public or private sphere may support biodiversity. Despite this, there is a lack of clarity about what actions should be prioritized for behavior change campaigns.

View Article and Find Full Text PDF

This study investigates the activity of the broad-spectrum bacteriocin nisin against a large panel of Gram-negative bacterial isolates, including relevant plant, animal, and human pathogens. The aim is to generate supportive evidence towards the use/inclusion of bacteriocin-based therapeutics and open avenues for their continued development. Nisin inhibitory activity was screened against a panel of 575 strains of Gram-negative bacteria, encompassing 17 genera.

View Article and Find Full Text PDF
Article Synopsis
  • Primary and booster vaccinations are essential for reducing COVID-19 spread and severity, highlighting the need to understand vaccine hesitancy better.
  • A study involving 993 individuals found that many reported allergic and skin reactions after their COVID-19 vaccinations, causing a significant shift in their perceptions of vaccine safety.
  • Nearly 40% of those surveyed experienced a negative change in attitude towards future vaccinations, with younger age and specific adverse reactions being linked to increased hesitancy.
View Article and Find Full Text PDF

Objectives: This study was aimed at understanding the attitudes and positions of key Australian organisational and political stakeholders towards using psychedelic agents in medically supervised environments to treat mental health conditions. Specifically, this research was designed to identify some of the issues that might impede the clinical implementation of psychedelics.

Methods: Semi-structured interviews were conducted with four Australian politicians and nine representatives of key stakeholder organisations between September 2022 and January 2023.

View Article and Find Full Text PDF

As a nation with relatively low levels of AMR, due to both community and agricultural stewardship, as well as geographical isolation, Australia is somewhat unique. As this advantage is being eroded, this project aimed to investigate the spectrum of human behaviours that could be modified in order to slow the spread of AMR, building upon the argument that doable actions are the best-targeted and least complex to change. We conducted a workshop with a panel of diverse interdisciplinary AMR experts (from sociology, microbiology, agriculture, veterinary medicine, health and government) and identified twelve behaviours that, if undertaken by the public, would slow the spread of AMR.

View Article and Find Full Text PDF

Objectives: To assess the effectiveness of a brief alcohol intervention for improving awareness of alcohol as a breast cancer risk factor, improving alcohol literacy, and reducing alcohol consumption by women attending routine breast screening.

Design: Single-site, double-blinded randomised controlled trial.

Setting: Maroondah BreastScreen (Eastern Health, Melbourne), part of the national breast cancer screening program.

View Article and Find Full Text PDF

Background: Alcohol consumption is a major modifiable risk factor for female breast cancer, even in small amounts. However, awareness of this risk remains low. National breast screening programs are uniquely positioned to provide timely and targeted health information and behavior change strategies to improve alcohol literacy and reduce consumption.

View Article and Find Full Text PDF

To stop the spread of SARS-CoV-2 coronavirus (COVID-19) governments around the world implemented lockdowns restricting public travel. In the Australian state of Victoria, this included limiting permitted reasons for leaving home and restricting movements to within a 5 km radius of one's home. In 2020, we conducted a state-wide survey ( = 1024) of Victorians that coincided with a lockdown.

View Article and Find Full Text PDF

In this Letter, we introduce a one-parameter deformation of two-dimensional quantum field theories generated by a nonanalytic operator that we call Root-TT[over ¯]. For a conformal field theory, the operator coincides with the square root of the TT[over ¯] operator. More generally, the operator is defined so that classically it is marginal and generates a flow that commutes with the TT[over ¯] flow.

View Article and Find Full Text PDF

Older workers who are confident about the changes accompanying retirement report higher well-being. We have developed an index to measure retirement confidence - the Retirement Confidence Index (RCI). A six-stage approach was used to develop the index items, including (i) a literature review to catalogue retirement confidence components; (ii) a consultation with a panel of experts to review the proposed indicators and combine components according to their meaning; (iii) normalisation of the selected components to make them comparable; (iv) weighting of the top-level dimensions using experts' judgement; (v) linear aggregation of the dimension scores according to their corresponding relative weight; and (vi) correlation of the composite score with a self-report measure of retirement confidence.

View Article and Find Full Text PDF

Background: Whilst evidence of use of face masks in reducing COVID-19 cases is increasing, the impact of mandatory use across a large population has been difficult to assess. Introduction of mandatory mask use on July 22, 2020 during a resurgence of COVID-19 in Melbourne, Australia created a situation that facilitated an assessment of the impact of the policy on the epidemic growth rate as its introduction occurred in the absence of other changes to restrictions.

Methods And Findings: Exponential epidemic growth or decay rates in daily COVID-19 diagnoses were estimated using a non-weighted linear regression of the natural logarithm of the daily cases against time, using a linear spline model with one knot (lspline package in R v 3.

View Article and Find Full Text PDF

The Lancet COVID-19 Commission Task Force for Public Health Measures to Suppress the Pandemic was launched to identify critical points for consideration by governments on public health interventions to control coronavirus disease 2019 (COVID-19). Drawing on our review of published studies of data analytics and modelling, evidence synthesis and contextualisation, and behavioural science evidence and theory on public health interventions from a range of sources, we outline evidence for a range of institutional measures and behaviour-change measures. We cite examples of measures adopted by a range of countries, but especially jurisdictions that have, thus far, achieved low numbers of COVID-19 deaths and limited community transmission of severe acute respiratory syndrome coronavirus 2.

View Article and Find Full Text PDF

In the face of ongoing attempts to achieve gender equality, there is increasing focus on the need to address outdated and detrimental gendered stereotypes and norms, to support societal and cultural change through individual attitudinal and behaviour change. This article systematically reviews interventions aiming to address gendered stereotypes and norms across several outcomes of gender inequality such as violence against women and sexual and reproductive health, to draw out common theory and practice and identify success factors. Three databases were searched; ProQuest Central, PsycINFO and Web of Science.

View Article and Find Full Text PDF

In recent decades, there has been increasing interest in (re)connecting people with nature to foster sustainability outcomes. There is a growing body of evidence suggesting a relationship between connection with nature and pro-environmental behaviors. Connection with nature has often been conceptualized as a unidimensional construct, and although recent evidence suggests that it is multidimensional, there is ongoing debate regarding the dimensions that make up connection with nature.

View Article and Find Full Text PDF

Herein is presented a molecular dyad comprised of a [Ru(bpy)] photosensitizer and an anthraquinone (AQ) acceptor coupled by an ethynyl linker ([Ru(bpy)(bpy-cc-AQ)]) in which activation/deactivation of photoinduced electron-transfer from the [Ru(bpy)] photosensitizer to the AQ acceptor is achieved and characterized as a function of the dielectric constant and hydrogen-bond donating ability of the solvent used. It is demonstrated that the rate of photoinduced electron-transfer can be modulated over several orders of magnitude (10-10 s) by choice of solvent. Nanosecond transient absorption spectra are dominated by MLCT signals and exhibit identical decay kinetics to the corresponding emission signals.

View Article and Find Full Text PDF

Microfluidics is an active research area in modern fluid mechanics, with several applications in science and engineering. Despite their importance in microfluidic systems, micro-orifices with non-circular cross-sections have not been extensively investigated. In this study, micro-orifice discharge with single-phase liquid flow was experimentally investigated for seven square and rectangular cross-section micro-orifices with a hydraulic diameter in the range of 326-510 µm.

View Article and Find Full Text PDF

The modular structure of metal-organic framework nanosheets (MONs) provides a convenient route to creating two-dimensional materials with readily tuneable surface properties. Here, the liquid exfoliation of two closely related layered metal-organic frameworks functionalised with either methoxy-propyl (1) or pentyl (2) pendent groups intended to bestow either hydrophilic or hydrophobic character to the resulting nanosheets is reported. Exfoliation of the two materials in a range of different solvents highlighted significant differences in their dispersion properties, as well as their molecular and nanoscopic structures.

View Article and Find Full Text PDF

In many countries, government strategies for biosecurity planning and outbreaks depend upon private livestock producers being willing and able to conduct surveillance of their animals and the timely reporting of suspicious signs of disease. From a behavioural perspective, these two kinds of behaviours - surveillance and reporting - should be treated separately when developing a biosecurity plan in which producers play a key role in the prevention, detection, and reporting of animal diseases. Having an effective surveillance system in place is conceptually and practically independent of a reporting system that is both feasible and trustworthy.

View Article and Find Full Text PDF

Information and communication technologies can be a valuable tool for enhancing health communication. However, not everyone is utilising the wide suite of digital opportunities. This disparity has the potential to exacerbate existing social and health inequalities, particularly among vulnerable groups such as those who are in poor health and the elderly.

View Article and Find Full Text PDF

Cleaning and disposal of illegal dumping at charitable collection points costs charities and diverts funds from their charitable programs. However, there is no published literature that attempts to better understand this problem. The current study assesses site-specific characteristics, community level indicators and sociodemographic factors as predictors of both charity stores and collection bin dumping in the metropolitan area of Perth, Australia.

View Article and Find Full Text PDF

Usually cited in reference to the potential reach of zoo education, one of the popular figures for global zoo visitation is that 600 million people visit zoos annually. However, this number needs clarification on two fronts. First, there are many zoo visitors who are not included in the calculation because they visited a zoo that was not included in the count.

View Article and Find Full Text PDF