Beilby J.,Curtin University
Seminars in Speech and Language | Year: 2014
Stuttering requires a multidimensional perspective given that, in recent years, researchers have shown the impact of the disorder to reach far beyond the surface components with demonstrated psychosocial and anxiety effects for the individual living with a stutter. This article explores the impact a stuttering disorder has on the individual (child, adolescent, and adult) and on their family members (siblings, parents, and partners). These experiences include behavioral and social difficulties, self-awareness, reactions to stuttering, communication difficulties in daily situations, and overall quality of life. The influence of stuttering on the most intimate relationships of the person who stutters is presented. An overview of stuttering across the life span is discussed in terms of stuttering in children and adolescents, and the significant levels of adverse impact as a result of living with a stutter are described. In addition, the impact that the stuttering disorder has on the parents and siblings of children who stutter is also detailed through significant findings pertaining to lack of attachment and trust between the young people and their parents. The responsibilities and demands on parents and siblings in the family context are highlighted. Focus is also placed on the experience of living with a person who stutters from the perspective of their life partner. Perceived quality of life is explored with unexpected differences recounted between the quality of life experienced by the adult who stutters and their partner's perceptions of this disorder. Finally, the potential for a novel Acceptance and Commitment Therapy for individuals who stutter is presented. © 2014 by Thieme Medical Publishers, Inc. Source
Brown A.M.,Curtin University
Marine Policy | Year: 2015
Through textual analysis, this paper takes into account documentary evidence of the Auditor-General's audit commentaries of the reporting compliance of the National Fisheries Authority of Papua New Guinea for the period 2006-2012. The results of the analysis show that the National Fisheries Authority's financial statements are late, unprepared or qualified. The study suggests ways the authority might improve its reporting compliance at relatively little cost, and how using national reporting compliance instruments may enhance national fisheries policy. The findings are of critical importance for fishing authority local managers, policy-makers and practitioners interested in providing compliant financial and operational reporting to meet the decision needs of its key stakeholders. © 2014 Elsevier Ltd. Source
A mining operation in space could bear some resemblance to what people have seen in movie theatres considering the venture has backing from Avatar director James Cameron, but thankfully WA's resource industry has more to learn than fear from a space mining push. The frontrunner of the space mining corporate scene, which also counts Google bosses Larry Page and Eric Schmidt among its key investors, has lauded the US Congress's approval of the Spurring Private Aerospace Competitiveness and Entrepreneurship (SPACE) Act in late 2015. This controversially allows private companies to claim ownership of any non-living resources they obtain in space plus extends existing indemnities related to any possible catastrophic commercial aerospace launch failures up to 2025. There are various problems with the SPACE Act, according to Australian Centre for Space Engineering Research director Professor Andrew Dempster, but he says it is a good start. "Mining in space is real and we need to start thinking about how to regulate it, at an international level," he says. Asteroid hunters also have a new tool at their disposal with scientists recently developing a gamma-ray spectroscope capable of detecting metals in these orbiting rocks. But the asteroid scoping technology is also expected to help the conventional mining industry. "With companies in this business for a few years now, it is not surprising that new sensors for space prospecting are emerging," Prof Dempster says. "This is not a threat to terrestrial mining—quite the opposite in fact—the new sensors are also likely to be useful on Earth. Prof Dempster estimates that a full off-earth mining operation is a decade or two away. "It's not happening tomorrow, but it is within the time-frames with which big mining companies operate," he says. However, Planetary Resources is mainly hunting for significant oxygen and hydrogen-hosting asteroids to produce rocket fuel for space shuttles. This strategy avoids the headaches of making any asteroid product survive the re-entry into Earth's atmosphere at a profit. Curtin University astrogeologist Dr Martin Towner says WA could learn and contribute a lot to future off-Earth mining. "The sort of technologies of autonomous and remote robotics used in space are very similar to the remote systems that are now arriving in the resource industry, so technology could flow both ways," he says. Explore further: Space mining startup set for launch in US This article first appeared on ScienceNetwork Western Australia a science news website based at Scitech.
News Article | September 2, 2016
Some utilities may think that it will be up to a decade before there is a mass market uptake of battery storage, and the chair of the Australian Energy Market Operator may even try to convince themselves that the technology won’t be commercial for another two decades, but they might be kidding themselves: New research suggests that the cross-over point between the value of solar and storage and grid prices for Australian households may occur within one year. That, at least, is the conclusion of research from Curtin University’s Jemma Green and Peter Newman, which suggests that the A1 tariff – the standard tariff offered to households by state owned retailer Synergy in West Australia – will become more expensive than the combined value of rooftop solar and battery storage some time in 2017. The graph was presented on Tuesday by David Martin – Green’s fellow executive in the solar trading start-up Power Ledger, which is using blockchain technology (the software behind Bitcoin) to trial solar sharing business models in Perth. “That price crossover – the point where the A1 tariff is equal to the value of energy from solar and tariffs happens next year … next year,” Martin told the Energy Disruption conference in Sydney co-hosted by RenewEconomy. He said that did not meant that people were going to “leap off the grid” in big numbers straight away. That’s because when that point is reached there are “intangible benefits” of being connected to the network, and it would cost a lot more to install enough batteries to deal with the consumer’s demand peaks, or days of cloudy weather. “But as soon as these lines diverge by a significant amount – and overtake the benefits of being connected to the network, then what happens?” The answer, he pointed out in another graph, is a big problem for the utilities that make their money from supplying power to households, because a lot of that demand will now disappear from view, and go “behind the meter.” Martin says a home with a 4kW array might still use the grid for most of the time – meaning that only 45 per cent of the load is “hidden” from the network behind the meter. But with battery storage, the rate of “load defection” – as opposed to grid defection – was likely to increase to the high 90 per cent levels in some instances (see graph above). Those households will only be tapping into network for a small amount of their energy needs. This, of course, has major implications for network business models – particularly their revenue source – and for other consumers. Networks, Martin says, will have to face losing $100 million in revenue in West Australia for instance, or load 20 per cent more grid costs on to other consumers to protect their revenues. Hence, Martin says, the need for completely new ways of thinking about network use, and of sharing solar energy and battery storage. That’s what Power Ledger intends to do with its shared solar model – it allows those with solar and storage to share their power with those who maybe don’t have it – and allows better utilisation of the grid. It also requires, he says, a completely new way of thinking about regulations. The rules governing the electricity industry had been framed without any consideration for sharing energy, for storing energy, or for the kind of technology that his company proposes. Martin was not the only person talking of an imminent tipping point in the economics of battery storage. Stefan Jarnason, the founder and head of Solar Analytics, a monitoring company partly owned by AGL Energy, says he believed that even some of the more bullish forecasts for battery storage were too conservative. These included predictions – from the likes of Bloomberg New Energy Finance above – that some six million households will have energy storage by 2040. Jarnason says that this shows that massive uptake is inevitable, but it is the speed that counts. He notes there there are already 1.6 million homes with rooftop solar, and around one million of these would soon be paid “visually” nothing for the vast majority of their rooftop solar production that is exported back to the grid. Most premium tariffs end at the end of the year in NSW, Victoria and South Australia. “We talk to those customers and they are not very happy about that. They love the fact that they have solar, they feel a bit green, a bit financially savvy, even a bit smug, but they already have got their money back on solar and they are now looking to do something extra.” That estimate is backed up by experience from one of the many battery storage providers moving into the Australian market. Enphase Energy, which is launching its first battery storage product in Australia, says more than half of the 72,000 units of its 1.2kWh battery has come from NSW, where generous feed in tariffs come to an end at the end of the year. “The energy storage revolution is going to come much faster than a lot of people imagine and a lot of people are prepared,” Jarnason says. “Residential solar plus storage is going to eat the energy world.” Drive an electric car? 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"Scientists studying the formation of antihydrogen ultimately hope to explain why there is more matter than antimatter in the universe." Antihydrogen is a particular kind of atom, made up of the antiparticle of an electron—a positron—and the antiparticle of a proton—an antiproton. Scientists hope that studying the formation of anti hydrogen will ultimately help explain why there is more matter than antimatter in the universe. In a new study published in EPJ D, Igor Bray and colleagues from Curtin University, Perth, Australia, demonstrate that the two different numerical calculation approaches they developed specifically to study collisions are in accordance. As such, their numerical approach could therefore be used to explain antihydrogen formation. There are several methods of explaining anti-hydrogen creation. These involve calculating what happens when a particular kind of particle, made up of an electron and a positron bound together, called positronium, scatters on a proton or on an antiproton. The trouble is that devising numerical simulations of such collision is particularly difficult due to the presence of two centres for the occurrence: the atomic level with the proton and at the positronium level. The authors employed two very different calculations —using a method dubbed coherent close-coupling—for both one- and two-centre collisions respectively in positron scattering on hydrogen and helium. Interestingly, they obtained independently convergent results for both approaches. Such convergence matters, as it is a way to ascertain the accuracy of their calculations for anti-hydrogen formation. They then also compared the estimates of the area in the vicinity of the atom within which the positronium would need to be to ensure collision. They found excellent agreement with the two methods for hydrogen. However, their method did not prove quite as good for helium. This indicates that there is further room for improvement in the theory for helium before the approach can be applied to more complex atoms, such as magnesium and molecular hydrogen. Explore further: New antimatter method to provide 'a major experimental advantage' More information: Igor Bray et al. Internal consistency in the close-coupling approach to positron collisions with atoms, The European Physical Journal D (2016). DOI: 10.1140/epjd/e2015-60591-7