Analysis of reverse logistics implementation practices by South Australian construction organisations

Purpose – A large number of benefits have been reported when reverse logistics (RL) is fully implemented in the construction industry. However, RL is yet to become common place in the construction sector, particularly in Australia. The particular sub-sector in which RL operates is small and weak and the remainder of the sector must embrace and accommodate it comfortably. Research is lacking on how to promoting RL in the construction industry. Very little has been done to identify the current practices that have the potential to promote RL industry-wide. The purpose of this paper is to identify the practices that work well in the sector, a strategy could be mapped out to promote RL to all stakeholders. Design/methodology/approach – In order to fill the above gap, the present study used a mixed method approach to gather and evaluate current practices and their potential to promote RL in South Australia’s construction industry. Practices that were identified using a comprehensive literature review were evaluated with a questionnaire survey and series of interviews involving construction professionals. Findings – The findings are that practices facilitating deconstruction is the most important, followed by practices facilitating the use of salvaged materials in new construction to promote RL in South Australia. Awareness of deconstruction benefits, challenges and procedures at the organisation level and facilities and services at industry level were associated with RL implementation. Availability of salvaged materials in the market was found to influence its use in new construction and as a consequence its demand. Designing for reverse logistics is another practice that could facilitate deconstruction and the onus of its promotion lies mainly with the designers. Research limitations/implications – This research was confined to one state in Australia. As such the generalisation to other states and other countries should be treated cautiously. Practical implications – The findings of this study can help inform the industry and its stakeholders on areas that they need to concentrate more on to make the South Australian construction industry a fully RL integrated one. To that end the authors propose some recommendations arising from the findings reported here. Originality/value – This study makes a contribution to the body of knowledge on reserve logistics within a previously unexplored South Australian context. In addition, the study provides valuable insights into the contribution of RL practices to the construction industry.

Numerical simulation of a Savonius turbine above an infinite-width forward facing step

The Savonius turbine, although simple in construction, typically has a maximum power coefficient (cP) of about 0.2. This is significantly lower than the cP of the axial flow propeller-type turbine which typically can be as high as 0.5. However, a simple means to improve the cP of a Savonius turbine is to install it above a forward facing step, for example, a cliff or a building. In this work, prior experimental results of the tow testing of a Savonius turbine installed above a finite-width bluff body were used to validate computational fluid dynamics simulation of the same experimental conditions. The validated simulation settings were then used to obtain the maximum cP of a similar turbine of finite width but installed above an infinite-width forward facing step over a range of installation positions above and behind the step.

"I can sit on the beach and punt through my mobile phone" : the influence of physical and online environments on the gambling risk behaviours of young men.

Gambling is rapidly emerging as an important public health issue, with gambling products causing considerable health and social harms to individuals, families and communities. Whilst researchers have raised concerns about online wagering environments, few studies have sought to explore how factors within different gambling environments (both online and land-based) may be influencing the wagering, and more broadly the gambling risk behaviours of young men. Using semi-structured interviews with 50 Australian men (20-37 years) who gambled on sport, we explored the ways in which online and land-based environments may be risk-promoting settings for gambling. This included the appeal factors associated with gambling in these environments, factors that encouraged individuals to gamble, and factors that encouraged individuals to engage in different, and more harmful types of gambling. Interviews were conducted over the course of a year (April 2015 - April 2016). We identified a number of situational and structural factors that promoted risky gambling environments for young men. In the online environment, gambling products had become exceedingly easy to access through mobile technologies, with young men subscribing to multiple accounts to access industry promotions. The intangibility of money within online environments impacted upon risk perceptions. In land-based environments, the social rituals associated with peer group behaviour and sport influenced risky patterns of gambling. The presence of both gambling and alcohol in pub environments led individuals to gamble more than they normally would, and on products that they would not normally gamble on. Land-based venues also facilitated access to multiple forms of gambling under the one roof. We identified a number of factors in both land and online environments that when combined, created risk-promoting settings for gambling among young men. By exploring these contextual conditions that give rise to gambling harm, we are better able to advocate for effective public health responses in creating environments that prevent harmful gambling.

A pixel-based approach to estimation of solar energy potential on building roofs

Precise estimation of solar energy on building roofs plays a critical role in sustainable development and renewable energy consumption of high-density human habitats. Conventional solar radiation models based on costly Light Detection and Ranging (LiDAR) data are only adequate for existing buildings, not for future construction areas. In this paper, a pixel-based methodology is constructed for estimating solar energy potential over roofs. Buildings with flat roofs in a newly planned construction area are chosen as a case study. The solar radiation at a certain cell is mathematically formulated in the pixel unit, and its yields over a certain time period are calculated by considering multiple instantaneous solar irradiances and are visually presented by image processing. Significant spatial and temporal variations in solar radiation are measured. Within the study area, the maximum and minimum annual radiation yields are estimated at 4717.72 MJ/m2/year and 342.58 MJ/m2/year respectively. Radiation contour lines are then mapped for outlining installation ranges of various solar devices. For each apartment building, around 20% of roof areas can obtain 4500 MJ/m2/year or more solar radiation yields. This study will benefit energy investors and urban planners in accurately predicting solar radiation potential and identifying regions with high radiation over building roofs. The results can be utilised in government policies and urban planning to raise awareness of the use of renewable energy sources.

Centered Fluidity and the Horizons of Continuity in Djuna Barnes' Nightwood

Modern writers like Djuna Barnes allow for the post-modern fluidity and explosion of sex and gender without finalizing either in a fixed form. Whereas the classical, archetypal androgyne is made up of two halves, one man and one woman; the deconstructed androgynous figure is not constituted of oppositional terms which would reflect an essential and unimpeachable truth. I reveal the way Djuna Barnes’ Nightwood not only thematizes the fluid androgyne, but also cleverly verbalizes David Wood’s perpetual and un-dischargable “debt” to extra-discursivity while poetically critiquing gender “appropriateness,” societal constraints, and the constitution of identity. Barnes presents a decentralized, ungrounded and non-prescribed world in Nightwood not only through her cross-dressing and androgynous characters, but also in her poetics, her assertion of the open-ended quality of language, and a strong imperative to negotiate our physical existence in a world of fluid gender and sexual boundaries.