Comparisons of ballasted track and slab track for high speed railways: predictions, measurements and the use of embodied energy calculations to inform the choice of trackform

Recent advances in numerical modelling, such as 3D dynamic finite element analysis, and real-time video capture of track deflections under train loading enable direct comparisons of ballasted and slab track to be made.Results are presented for high speed and slower speed installations. Using embodied energy and CO2 emissions as key sustainability indicators, detailed calculations are presented for an as-built piled slab and an alternative embankment-supported high speed railway over very soft ground. These calculations can be extended into the maintenance regime, to permit detailed life cycle analyses to be made. The explicit use of sustainability indicators, in conjunction with numerical modelling, can enable rational decisions on track form to be made

The GM Debate:Risk, Politics and Public Engagement

This book tells the story of an unprecedented experiment in public participation: the government-sponsored debate on the possible commercialization of ‘GM’ crops in the UK. Giving a unique and systematic account of the debate process, this revealing volume sets it within its political and intellectual contexts, and examines the practical implications for future public engagement initiatives

Community expectations and anticipated outcomes for crisis support services – Lifeline Australia

Crisis lines provide a critical first line of mental wellbeing support for community members in distress. Given the increasing referral to such services, there is a need to understand what the expectations of the community are around the role of such services in our public health responses. A computer assisted telephone interview was undertaken between 28th October and 30th November 2019. The aim was to explore expectations and anticipated outcomes of Lifeline Australia's crisis support services from a nationally representative community sample (N = 1,300). Analysis was undertaken to determine if demographic variables (age, gender, indigenous status, country of birth, culturally and linguistically diverse (CALD) status, sexual orientation, household composition, region and State/territory) and past service use affected community expectations. Results showed that a majority of respondents expected Lifeline to listen and provide support, recommend other services, and provide information. Help-seekers were expected to feel heard and listened to, receive safety advice or support to stay safe, and feel more hopeful. Lifeline was expected to prioritise people feeling suicidal, in immediate personal crisis, and experiencing domestic violence. Findings reveal that community members hold expectations for Lifeline Australia to serve as a suicide prevention and general crisis support service, which are congruent with the service's aims. There was little variation in community expectations of crisis support services based on demographic factors and past service use. The results show that the community has extensive and diverse expectations for this national crisis service to meet both short and longer-term needs for all vulnerable members of the community—entailing a very substantial public health service responsibility. © 2021 John Wiley & Sons Ltd

Identifying counter-urbanisation using Facebook’s user count data

Identifying the growing widespread phenomenon of counter-urbanisation, where people relocate from urban centres to rural areas, is essential for understanding the social and ecological consequences of the associated changes. However, its nuanced dynamics and complex characteristics pose challenges for quantitative analysis. Here, we used near real-time Facebook user count data for Belgium and Thailand, with missing data imputed, and applied the Seasonal-Trend decomposition using Loess (STL) model to capture subtle urban and rural population dynamics and assess counter-urbanisation. We identified counter-urbanisation in both Belgium and Thailand, evidenced by increases of 1.80% and 2.14% in rural residents (night-time user counts) and decreases of 3.08% and 5.04% in urban centre night-time user counts from March 2020 to May 2022, respectively. However, the counter-urbanisation in Thailand appears to be transitory, with rural users beginning to decline during both day and night as COVID-19 restrictions were lifted. By contrast, in Belgium, at the country level, there is as yet no evidence of a return to urban residences, though daytime numbers in rural areas are decreasing and in urban centres are increasing, suggesting an increase in commuting post-pandemic. These variation characteristics observed both between Belgium and Thailand and between day and night, extend the current understanding of counter-urbanisation. The use of novel social media data provides an effective quantitative perspective to comprehend counter-urbanisation in different settings

Globalization and the public sphere: exploring the space of community media in Sydney

Recent accounts of Habermas's conception of the public sphere concern the interlocking of multiple networks and spaces. In a global context new interfaces between existing (counter-) public spheres can lead to multiple counter-publics. This article explores this phenomenon through the examination of the communicative spaces that offer alternatives to Australia's mainstream public sphere from three different strands of Sydney's community media: diasporic media (Assyrian Radio SBS), Indigenous media (Koori Radio) and discursive sites that operate in between ethnic and mainstream media (Forum for Australia's Islamic Relations)