Buckling tests of fire exposed cold-formed steel columns

Cold-formed steel sections are commonly used in low-rise commercial and residential buildings. During fire events, cold-formed steel structural elements in these buildings will be exposed to elevated temperatures. Hence after such events there is a need to evaluate the residual strength of these structural elements. However, only limited information is available in relation to the residual strength of fire exposed cold-formed steel sections. This means conservative decisions are often made in relation to fire exposed building structures. This research is aimed at investigating the buckling capacities of fire exposed cold-formed lipped channel steel sections. A series of compression tests of fire exposed, short lipped channel columns made of varying steel grades and thicknesses was undertaken in this research. Test columns were first exposed to different elevated temperatures up to 800 oC. They were then allowed to cool down at ambient temperatures before they were tested to failure. Similarly tensile coupon tests were also undertaken after being exposed to various elevated temperatures, from which the residual mechanical properties (yield stress and Young’s modulus) of the steels used in this study were derived. Using these mechanical properties, the residual compression capacities of tested short columns were predicted using the currently used design rules in AS/NZS 4600 and AISI cold-formed steel standards. This comparison showed that ambient temperature design rules for compression members can be used to predict the residual compression capacities of fire exposed short or laterally restrained cold-formed steel columns provided the maximum temperature experienced by the columns can be estimated after a fire event. Such residual capacity assessments will allow structural and fire engineers to make an accurate prediction of the safety of fire exposed buildings. This paper presents the details of this experimental study and the results.

Distortional buckling behaviour of fire exposed cold-formed steel columns

Cold-formed steel sections are commonly used in low-rise commercial and residential buildings. During fire events, cold-formed steel structural elements in these buildings can be exposed to elevated temperatures. Hence after such events there is a need to evaluate their residual strengths. However, only limited information is available in relation to the residual strength of fire exposed cold-formed steel sections. This research is aimed at investigating the distortional buckling capacities of fire exposed cold-formed lipped channel sections. A series of compression tests of fire exposed, short lipped channel columns made of varying steel grades and thicknesses was undertaken in this research. Test columns were first exposed to different elevated temperatures up to 800 oC, and then tested to failure after cooling down. Suitable finite element models were developed with post-fire mechanical properties to simulate the behaviour of tested columns and were validated using test results. The residual compression capacities of short columns were also predicted using the current cold-formed steel standards and compared with test and finite element analysis results. This comparison showed that ambient temperature design rules for columns can be used to predict the residual compression capacities of fire exposed short or laterally restrained cold-formed steel columns provided the maximum temperature experienced by the column can be estimated after a fire event. Such residual capacity assessments will allow engineers to evaluate the safety of fire exposed buildings. This paper presents the details of this experimental study, finite element analyses and the results.

Leaders in Local : Exploring Consumers‘ Purchase Intentions of Locally Produced Foods

* Local foods are growing in importance in the mind set of the consumer – “the new organic” (McKenzie-Minifie, 2007) * Consumers are becoming more active in choosing alternative channels to purchase locally grown/produced foods Growth of farmer’s markets, roadside stalls, community gardens and *CSA programs * Supermarkets and grocers continue to tailor their assortments to include, ethnic, organic, natural and local foods to meet changing consumer needs * Australian research is limited, although one early study has found ‘buying locally produced foods’ was considered an important attribute (Lea & Worsley, 2007) * International research has tended to focus on COO effects, rather than region or local effects. (Insch & Florek, 2009) *Emerging research is beginning to explore consumer interest in ‘local’ over simply ‘domestic’ – although not specifically in food. (Hustvedt, Carroll & Bernard, 2013) * One study has examined differences in attitudes, subjective norms and intentions toward the purchase of locally produced foods. (Campbell, 2013)

Bribery and corruption in Australian local councils

This paper explores concerns about corruptio and bribery in Australian local government and provides guidance for policy-makers on how to control bribery and corruption. Lack of regulation is a major reason why local councils are not taking appropriate anti-corruption or bribery measures. The author urgers regulators to impose radical and mandatory requirements, especially reporting requirements, on local councils. Australia should also look to other countries for successful measures to curb bribery and corruption.

Southern New England Social and Community Plan 2009 - Covering Local Government Authorities: Armidale Dumaresq, Guyra, Uralla and Walcha

The Southern New England (SNE) Social and Community Plan is a guide to collaborative, integrated planning involving the three spheres of government, the community and commercial sectors. The Plan is based on social justice principles such as: • Equity - fairness in resource distribution, particularly for those most in need • Access - fairer access for everyone to the economic resources and services essential to meeting their basic needs and improving their quality of life • Rights - recognition and promotion of civil rights • Participation - better opportunities for genuine participation and consultation about decisions affecting people's lives. The Plan is also aimed at improving the accountability of decision-makers, and should help the councils, in conjunction with their communities meet the state government's social justice commitments. Preparation of a social and community plan is required at least every five years, and as with most councils, Armidale Dumaresq Council (ADC) has produced two already, one in 1999 and one in 2004, following the amalgamation of the former Armidale City and Dumaresq Shire Councils in 2000. Those Councils formerly prepared their own Plans in 1999, based on shared consultancy work on a community profile. This is the first joint Southern New England Plan, featuring Armidale Dumaresq, Walcha, Uralla and Guyra Councils. This Social Plan has aimed to identify and address the needs of the local community by: • describing who makes up the community • summarising key priority issues • assessing the effectiveness of any previous plans • recommending strategic ways for council and other government and non-government agencies to met community needs.

Policing in Rural Australia: The country cop as law enforcer and local resident

The strategies and techniques that police officers employ are adaptations to the types of communities they serve and the law enforcement system of which they are part. Observations of policing in rural and urban areas of Australia indicate that, despite being part of a single state police service, officers develop working philosophies that are systematically adapted to the locations they serve. Bayley (1989) has observed that while crimes are policed in the city, people are policed in the country. Rural police officers often adopt a community-based model of policing in which officers become integrated into a community and establish compatible community relations. While this model can produce successful results, with integration into informal social networks providing police increased opportunities to solve crime, rural police regularly find themselves occupying competing roles of law enforcer and local resident. This chapter will outline how the organisation and structure of rural communities impacts upon policing, noting distinct issues associated with police work in rural settings. Before examining current aspects of rural policing, a brief discussion of the historical and cultural context of rural policing is provided.

Transnational preservice teachers in local education programs : a critical realist approach to narratives

This study explores how preservice teachers with non-Australian educational backgrounds and prerequisite qualifications make their way into and through a local teacher education program. It is informed by Margaret Archer's sociology of reflexivity to understand the interplay between these people's personal resources and institutional constraints and enablements. Data were collected from seven participants through narrative interviews. A narrative analysis identified big and small stories. Findings show that these preservice teachers purposefully exercise their agency as they invest in a common project for a variety of transnational goals. The outcome of that project emerges from the interaction between structure and agency.

Dubaization of Istanbul : insights from the knowledge-based urban development journey of an emerging local economy

Knowledge-based urban development (KBUD) has become a popular pursuit for cities especially from the developing countries to fast track the catching up process with their developed nation counterparts. Nevertheless, the KBUD progress for these cities is highly daunting and full of confronts. This paper aims to shed light on the major KBUD challenges of emerging local economies by undertaking an in-depth empirical investigation in one of these cities. The paper scrutinizes the prospects and constraints of Istanbul in her KBUD journey through comparative performance and policy context analyses. The findings reveal invaluable insights not only for Istanbul to reshape the policy context and better align the development with contemporary KBUD perspectives, but also for other emerging local economies to learn from these experiences.

Adaptive finite element analysis of elliptic problems based on bubble-type local mesh generation

A new mesh adaptivity algorithm that combines a posteriori error estimation with bubble-type local mesh generation (BLMG) strategy for elliptic differential equations is proposed. The size function used in the BLMG is defined on each vertex during the adaptive process based on the obtained error estimator. In order to avoid the excessive coarsening and refining in each iterative step, two factor thresholds are introduced in the size function. The advantages of the BLMG-based adaptive finite element method, compared with other known methods, are given as follows: the refining and coarsening are obtained fluently in the same framework; the local a posteriori error estimation is easy to implement through the adjacency list of the BLMG method; at all levels of refinement, the updated triangles remain very well shaped, even if the mesh size at any particular refinement level varies by several orders of magnitude. Several numerical examples with singularities for the elliptic problems, where the explicit error estimators are used, verify the efficiency of the algorithm. The analysis for the parameters introduced in the size function shows that the algorithm has good flexibility.

The Sawa World model : addressing extreme poverty through local solutions and youth empowerment

With an estimated 1.2 billion people worldwide living in extreme poverty, it is critical to find effective long-term solutions. Sawa World is a non-profit organization founded by Daphne Nederhorst in 2005 to empower marginalized youth to document simple, locally created solutions that address this pressing issue. Currently working primarily in Uganda, Sawa World has created a unique model that celebrates powerful solutions generated from within the community to help people living in poverty help themselves. Using inspiring local leaders who themselves come from extreme poverty, Sawa World aims to end extreme poverty from the ground up.

Queensland's film culture: The challenges of local film distribution and festival exhibition

Organisations at the centre of the state’s industry, such as Screen Queensland, have undergone substantial and ongoing changes in the last five years. Other organisations funded by Screen Queensland, such as QPIX, Queensland’s only film development centre, have recently closed. The Brisbane International Film Festival has been restructured to become the Brisbane Asia Pacific Film Festival as of 2014. In an uncertain industry currently characterised by limited funding and diminishing support structures, local emerging filmmakers require significant initiatives and a sophisticated understanding of how to best utilise fledgling distribution models as part of a tailored strategy for their content. This essay includes interviews with emerging Brisbane filmmakers who have used a combination of traditional and contemporary approaches to exhibition and distribution thus far in their careers. It argues that for these filmmakers, while film festivals do function as crucial platforms for exposure, in the current digital market they cannot be relied upon as the only platform in securing further mainstream or commercial release. They can, however, be incorporated into an alternative distribution model that shows awareness of the contemporary situation in Australia. The research findings are arguably indicative of the challenges faced by filmmakers statewide, and suggest that further support strategies need to be considered to revive Queensland’s film culture and provide immediate support for emerging filmmakers. Queensland’s film sector is currently in the midst of significant change.

The effect of using different regions of interest on local and mean skin temperature

The dynamic nature of tissue temperature and the subcutaneous properties, such as blood flow, fatness, and metabolic rate, leads to variation in local skin temperature. Therefore, we investigated the effects of using multiple regions of interest when calculating weighted mean skin temperature from four local sites. Twenty-six healthy males completed a single trial in a thermonetural laboratory (mean ± SD): 24.0 (1.2) °C; 56 (8%) relative humidity; < 0.1 m/s air speed). Mean skin temperature was calculated from four local sites (neck, scapula, hand and shin) in accordance with International Standards using digital infrared thermography. A 50 x 50 mm square, defined by strips of aluminium tape, created six unique regions of interest, top left quadrant, top right quadrant, bottom left quadrant, bottom right quadrant, centre quadrant and the entire region of interest, at each of the local sites. The largest potential error in weighted mean skin temperature was calculated using a combination of a) the coolest and b) the warmest regions of interest at each of the local sites. Significant differences between the six regions interest were observed at the neck (P < 0.01), scapula (P < 0.001) and shin (P < 0.05); but not at the hand (P = 0.482). The largest difference (± SEM) at each site was as follows: neck 0.2 (0.1) °C; scapula 0.2 (0.0) °C; shin 0.1 (0.0) °C and hand 0.1 (0.1) °C. The largest potential error (mean ± SD) in weighted mean skin temperature was 0.4 (0.1) °C (P < 0.001) and the associated 95% limits of agreement for these differences was 0.2 to 0.5 °C. Although we observed differences in local and mean skin temperature based on the region of interest employed, these differences were minimal and are not considered physiologically meaningful.

Exploring urban consumers’ attitudes and intentions to purchase local food in Chile

Although local food consumption is growing in importance there remains a lack of research addressing local food consumption preferences in less-developed countries. This paper aims to examine the drivers of local food purchase intentions for Chilean consumers. A model of local food behavioral intention was developed from consumer behavior theory. The model was tested using structural equation modeling with data from Chilean shoppers located in Santiago (n=283). The analysis revealed that Chilean consumers are willing to purchase local food based on their positive attitude towards buying local food and their feelings of connectedness with the environment, but not because they have a desire to support local businesses. These findings have implications for retailers, marketers and food producers.

Evolution of the docklands food hub : a design-led innovation approach to food sovereignty through local food systems

Access to nutritious, safe and culturally appropriate food is a basic human right (Mechlem, 2004). Food sovereignty defines this right through the empowerment of the people to redefine food and agricultural systems, and through ecologically sustainable production methods. At the heart of the food sovereignty movement are the interests of producers, distributors and consumers, rather than the interests of markets and corporations, which dominate the current globalized food system (Hinrichs, 2003). Food sovereignty challenges designers to enable people to innovate the food system. We are yet to develop economically viable solutions for scaling projects and providing citizens, governments and business with tools to develop and promote projects to innovate food systems and promote food sovereignty (Meroni, 2011; Murray, Caulier-Grice and Mulgan, 2010). This article examines how a design-led approach to innovation can assist in the development of new business models and ventures for local food systems: this is presented through an emerging field of research ‘Design-Led Food Communities’. Design-Led Food Communities enables citizens, governments and business to innovate local food projects through the application of design. This article reports on the case study of the Docklands Food Hub Project in Melbourne, Australia. Preliminary findings demonstrate valued outcomes, but also a deficiency in the design process to generate food solutions collaboratively between government, business and citizens.