Добірка наукової літератури з теми "Fuel Specifications Australia"

Australia’s lack of gas supply infrastructure and market opportunities means that in the northwest of our nation more than 100 trillion cubic feet of gas remains uncommitted to customer contracts.Because of Western Australia’s relatively small domestic gas markets and the long transport distances to larger markets, the belief has been that only the LNG industry has the scale to monetise the large volumes of gas required to underpin greenfield developments and expansion of gas supply infrastructure.Changing fuel specifications around the world, combined with the limited opportunities for new LNG contracts, has renewed interest in gas-to-liquids (GTL) technology as an alternative to crude oil refining for a source of clean and efficient transport fuels. GTL is an exciting new market opportunity for Australian gas.Exploration interest in Australia appears to be waning. Declining opportunities for oil discoveries and the lack of markets for natural gas make investments in Australia’s upstream sector unattractive compared to other locations around the world.In addition, Australia has dwindling crude oil supplies and faces the prospect of increasing reliance on imported crude oil and refined products. An Australian GTL Clean Diesel industry can help overcome these hurdles by creating a designer blendstock and a valuable new GTL Clean Diesel export industry.A GTL Clean Diesel industry would not only help resolve many of Australia’s current upstream and downstream problems in the petroleum industry, but would also provide massive economic benefits to Australia.This paper will look not only at the making but also the marketing of this fuel of the future.

Different factors can impact on the timber harvesting methods including stand characteristics, ground conditions, extraction distance, climate, silvicultural treatments and social interests. The multiple-criteria analysis is an effective methodology for helping foresters decide what system to apply depending on their operations specifications. Four harvesting methods were compared in Western Australian Eucalypt plantations including cut-to-length (CTL), in-field chipping using a delimbing and debarking flail integrated with the chipper (IFC-DDC), in-field chipping using a chipper with a separate flail machine for delimbing and debarking (IFC-F/C) and whole tree to roadside (WTR). The decision criterions consisted of total operating cost (from stand to mill gate), yield per ha, harvesting residues, fuel consumption and bark content of the chips. The Promethee method was used to evaluate the alternatives using Decision Lab software. Based on the results, the IFC-DCC was the best harvest method while WTR method was the worst harvesting alternative in the case study area. IFC-DCC method resulted in the lowest operating cost and the highest recovered yield per ha compared to the other harvesting methods.

A series of tests on cold-formed steel square and rectangular hollow sections subjected to web crippling is reported in this paper. The web crippling tests were conducted under two loading conditions of end-two-flange (ETF) and interior-two-flange (ITF), which are specified in the current North American Specification for cold-formed steel structures. The concentrated load was applied by means of bearing plates, which act across the full flange width of the specimen sections. Different bearing lengths were investigated. The test specimens were fabricated by cold-rolling from steel sheet with nominal yield strength of 345MPa. The measured web slenderness values of the tubes ranged from 15.5 to 46.0. The test strengths obtained from this study are compared with the design strengths obtained using the current North American Specification, Australia Standard, European Code and Chinese Code for cold-formed steel structures. It is shown that the design strengths predicted by the specifications are either unreliable or too conservative.

The transition to parenthood is a topic of substantial interest to family researchers across the social sciences, and many theoretical paradigms have been invoked to understand how it affects men’s and women’s lives. While early empirical scholarship on the transition to parenthood relied on cross-sectional data and methods, the increasing availability of panel data has opened up new analytical pathways—including the possibility to track the same individuals over time as they approach and experience parenthood and their children grow older. By making full use of longitudinal data, researchers can both improve estimation of the consequences of parenthood, as well as advance knowledge by testing more nuanced and complex theoretical premises involving time dynamics. In this article, I present an overview of panel regression models, a family of specifications that can be leveraged for these purposes. In doing so, I discuss the data requirements, advantages and disadvantages of different models, pointing to useful examples of published research. The approaches considered include random effects and fixed effects panel regression models, specifications to model linear and nonlinear time dynamics, and specifications to handle dyadic data structures. The use of these techniques is exemplified via an application considering the effect of motherhood on time pressure using long-running panel data from an Australian national sample, the Household, Income and Labour Dynamics in Australia Survey ( n = 68,911 observations; 10,734 women).

The sugar industry is an ideal sector for electricity cogeneration due to a large amount of burnable bagasse produce as a by-product. Bagasse produced in the sugar industry always consists of moisture affecting the efficiency of a boiler in the cogeneration plant. In our case study, a cogeneration plant run by bagasse burning found with bagasse moisture problem and suffocating with low power generation for the last few years. The boiler efficiency per tonne of bagasse is currently lower than optimal due to the substantial percentage of water present in the bagasse. A bagasse dryer design for this industry can improve the efficiency of a boiler as well as the cogeneration plant. In this paper, a pneumatic bagasse drying system is proposed to reduce the moisture content of bagasse from 48% to 30%. This work provides a full analysis of bagasse dryer design parameters, including specifications for dryer system components, such as feeders, fan, drying tube, and cyclone. The total bagasse drying system proposed is expected to be fitted within a 6 × 6 × 25 m space to dry 60 tph of bagasse, reducing the moisture content from 48% to 30%, in full compliance with all relevant Australian and company standards.

Wildfires are not only a natural part of many ecosystems, but they can also have disastrous consequences for humans, including in Australia. Rugged terrain adds to the difficulty of predicting fire behavior and fire spread, as fires often propagate contrary to expectations. Even though fire models generally incorporate weather, fuels, and topography, which are important factors affecting fire behavior, they usually only consider the surface wind; however, the more elevated winds should also be accounted for, in addition to surface winds, when predicting fire spread in rugged terrain because valley winds are often dynamically altered by the interaction of a layered atmosphere and the topography. Here, fire spread in rugged terrain was examined in a case study of the Riveaux Road Fire, which was ignited by multiple lightning strikes in January 2019 in southern Tasmania, Australia and burnt approximately 637.19 km2. Firstly, the number of conducive wind structures, which are defined as the combination of wind and temperature layers likely to result in enhanced surface wind, were counted by examining the vertical wind structure of the atmosphere, and the potential for above-surface winds to affect fire propagation was identified. Then, the multiple fire propagations were simulated using a new fire simulator (Prototype 2) motivated by the draft specification of the forthcoming new fire danger rating system, the Australian Fire Danger Rating System (AFDRS). Simulations were performed with one experiment group utilizing wind fields that included upper-air interactions, and two control groups that utilized downscaled wind from a model that only incorporated surface winds, to identify the impact of upper air interactions. Consequently, a detailed analysis showed that more conducive structures were commonly observed in the rugged terrain than in the other topography. In addition, the simulation of the experiment group performed better in predicting fire spread than those of the control groups in rugged terrain. In contrast, the control groups based on the downscaled surface wind model performed well in less rugged terrain. These results suggest that not only surface winds but also the higher altitude winds above the surface are required to be considered, especially in rugged terrain.

Background Effective migration often requires supports for new arrivals, referred to as settlement services. Settlement services literacy (SSL) is key to ensuring new migrants have the capability to access and utilise the information and services designed to support the resettlement process and achieve positive settlement outcomes. To date, however, no research has sought to empirically validate measures of SSL or to assess individual migrants’ levels of SSL. The aim of this study was to establish the psychometric properties of constructs from the conceptual SSL framework. Design Using a snowball sampling approach, trained multilingual research assistants collected data on 653 participants. The total sample was randomly divided into two split-half samples: one for the exploratory factor analysis (EFA; N = 324) and the other for the confirmatory factor analysis (CFA; N = 329) and scale validation. The final SSL scale included 30 questions. The full data set was used to test the nomological validity of the scale regarding whether the components of SSL impact on migrants’ level of acculturative stress. Results The EFA yielded five factors: knowledge (eight items, α = 0.88), empowerment (five items, α = 0.89), competence (four items, α = 0.86), community influence (four items, α = 0.82), and political (two items, α = 0.81). In the CFA, the initial model demonstrated a poor to marginal fit model. Its re-specification by examining modification indices resulted in a good model fit: CMIN/DF = 3.07, comparative fit index = 0.92, root mean square error of approximation = 0.08 and standardised root mean square residual = 0.07, which are consistent with recommendations. All the path coefficients between the second-order construct (SSL) and its five dimensions (knowledge, empowerment, competence, community influence and political) were significant at an α = .05 level, giving evidence for the validity of different SSL dimensions. We found that SSL is significantly related to migrants’ acculturative stress (β = - 0.39, p < 0.05) in the nomological model. Conclusions The study provides evidence of the construct validity and reliability of the SSL tool. It provides the basis for integrating the measures of SSL into evaluation of settlement services. This will allow for more effective decision-making in designing and implementing settlement services as well as funding and service agreements to address any deficiencies.

Valaris Adds Fresh Rig Contracts to Backlog Valaris has scooped a number of new contracts and contract extensions, adding an associated $466 million to its contract backlog. The company received a 540-day contract with Equinor offshore Brazil for use of drillship Valaris DS-17. The rig will be reactivated for this contract, which is expected to begin in mid-2023. The total contract value is around $327 million, including an upfront payment totaling $86 million for mobilization costs, a contribution toward reactivation costs, and capital upgrades. The remaining contract value relates to the operating day rate and additional services. Also in Brazil, Valaris received a contract extension with TotalEnergies EP Brasil offshore Brazil for the use of drillship Valaris DS-15. The option is in direct continuation of the current firm program. “We are particularly pleased to have been awarded another contract for one of our preservation stacked drillships, Valaris DS-17, and look forward to partnering with Equinor on their flagship Bacalhau project in Brazil,” said Valaris Chief Executive Anton Dibowitz. “We expect Brazil to be a significant growth market for high-specification floaters over the next several years, and we are well positioned to benefit by now adding a third rig to this strategic basin.” The contractor also was awarded a two-well contract extension with Woodside offshore Australia for semisubmersible Valaris DPS-1. The two-well extension has an estimated duration of 38 days and will be in direct continuation of the existing firm program for Woodside’s Enfield plug-and-abandonment (P&A) campaign. The P&A work covers 18 wells in total. Woodside also awarded Valaris a separate one-well extension for the rig. The work has an estimated duration of 60 days with Woodside’s Scarborough development campaign. Elsewhere, Shell awarded a 4-year contract for heavy-duty modern jackup Valaris 115 offshore Brunei. The $159-million contract is expected to begin in April 2023. The contract was also awarded various short-term deals for jackups with Shell in the UK, an undisclosed operator in the Gulf of Mexico (GOM), Cantium in the GOM, and GB Energy offshore Australia. Shell Joins Equinor in GOM Sparta Development Shell has agreed to purchase 51% of Equinor’s interest in the North Platte deepwater development project in the US Gulf of Mexico (GOM). Equinor will retain 49% interest in the project, and Shell will become the new operator of the field. The new partners also have agreed to rename North Platte to Sparta. Sparta straddles four blocks of the Garden Banks area, 275 km off the coast of Louisiana in approximately 1300 m of water depth. Front-end engineering and design has been matured for the project. Equinor and Shell will review the work that has been completed and update the development plan. Shell said that Sparta aligns with its strategy to pursue upstream investments that can remain competitive over time, both from a financial and environmental-intensity perspective. North Platte was discovered by Cobalt Energy and Total in 2012. The partners said the Wilcox-aged discovery would require 20K-psi technology to develop. Cobalt went bankrupt in 2017 and its stake in the asset was sold to Equinor and Total. In early 2022, TotalEnergies walked away from the project and its operatorship to focus on other projects, leaving Equinor with 100% interest. BP Awarded King Mariout Block in Egypt’s West Med BP has been awarded the King Mariout exploration block offshore Egypt following its participation last year in the limited bid round organized by the Egyptian Natural Gas Holding Company. The King Mariout Offshore area is located 20 km west of the Raven field in the Mediterranean Sea and covers 2600 km2 with water depths ranging between 500 and 2100 m. The block is within the West Nile Delta area, for which material gas discoveries could be developed using existing infrastructure. BP holds a 100% stake in the block. BP is a major player in Egypt investing more than $35 billion in the area over the past 60 years. LLOG Begins Production From Spruance in GOM LLOG has kicked off production from its operated Spruance Field located in Ewing Bank Blocks 877 and 921 in the US GOM. The two-well subsea development is producing, in combination, approximately 16,000 B/D of oil and 13 MMcf/D via a 14-mile subsea tieback to the EnVen-operated Lobster platform in nearby Block 873. The Spruance Field was initially discovered by LLOG and its partners in mid-2019 via a subsalt exploratory well, the Ewing Bank 877 #1, which was drilled in 1,570 ft to a total depth of 17,000 ft and logged around 150 net ft of oil pay in multiple high-quality Miocene sands. A second well, the Ewing Bank 921 #1, was drilled from the same surface location as the discovery well to a total depth of 16,600 ft in early October 2020. The well delineated the main field pays and logged additional oil pay in the exploratory portion of the well, finding a total of more than 200 net ft of oil. LLOG is the operator of the Spruance Field and owns a 22.64% working interest with partners Ridgewood Energy (23.89%), EnVen (13.5%), Beacon Asset Holdings (11.61%), Houston Energy (11.2%), Red Willow (11.15%), and CL&F (6%). Egypt Signs Agreement With Chevron To Drill First Exploration Well in East Med Chevron is planning to drill the first exploration well in its concession area in the Eastern Mediterranean this September. The well plans come as Egyptian Natural Gas Holding signed a memorandum of understanding with the US-based producer to cooperate in transporting, importing, and exporting natural gas from the area. Chevron expanded its presence in the area following its $5-billion acquisition of Noble Energy in 2020. The two companies will evaluate options for natural gas transmission from the East Mediterranean to Egypt to optimize its value through liquefaction before re-exporting and selling it, according to the memorandum. In addition, the two firms will perform research on low-carbon natural gas. APA Suriname Campaign Offers Mixed Results APA Corporation successfully flow tested its Krabdagu exploration well (KBD-1) on Block 58 offshore Suriname, while its Rasper exploration well on Block 53 offered disappointing results. Flow-test data collected in the two lower intervals, the Upper Campanian (32 m of net oil pay) and Lower Campanian (32 m of net oil pay), indicate oil-in-place resources of approximately 100 million bbl and 80 million bbl, respectively, connected to the KBD-1 well. Appraisal drilling will be necessary to confirm additional resource and development-well locations, according to APA. The exploration well encountered another high-quality interval in the Upper Campanian that was not in a location suitable for flow testing. This shallower Campanian zone will need to be flow tested in the appraisal stage from a better location. The APA-TotalEnergies joint venture is currently drilling the Dikkop exploration well in the central portion of Block 58 with drilling rig Maersk Valiant. Following completion of operations at Dikkop, the rig is expected to continue exploration and appraisal activities in the central portion of Block 58. APA Suriname and operator TotalEnergies each hold a 50% working interest in the block. Meanwhile, APA’s Rasper well in Block 53 off Suriname encountered water-bearing reservoirs in the Campanian and Santonian intervals. The Noble Gerry de Souza drillship has been mobilized to the next exploration prospect, Baja, in the southwestern corner of Block 53. Baja lies 11 km northeast of the recently announced Block 58 discovery at Krabdagu and will test Maastrichtian and Campanian targets. APA Suriname, the operator, holds a 45% working interest in the block, Petronas holds a 30% working interest, and CEPSA a 25% working interest. Novatek JV Wins North Yarudeyskoye License Novatek’s Yargeo joint venture has won the license to survey, explore, and develop production at the North Yarudeyskoye oil and gas condensate field over the next 27 years. The license area is in the Yamal-Nenets autonomous region in the Arctic, Russia’s principal gas-producing area. North Yarudeyskoye holds an estimated hydrocarbon resource potential of 93.5 million BOE. The greater Yarudeyskoye field began producing in 2015 and by 2017 was responsible for nearly a third of Novatek’s liquids production. The company, Russia’s largest private natural gas producer, noted that it had participated in the recent auction to explore and develop North Yarudeyskoye through Gazprom Bank’s Electronic Trading Platform and that the win was Novatek’s first on that platform. PDC Energy Gets Green Light for Kenosha, Broe Developments The Colorado Oil and Gas Conservation Commission has approved PDC Energy’s Kenosha and Broe developments’ permit applications. The Kenosha development, which encompasses 69 wells on three pads in rural Weld County, Colorado, further increases PDC’s permitted inventory by another rig year and solidifies drilling and completion activity well into 2024. The Broe permit encompasses 30 wells in rural Weld County. The Broe plan was initiated by Great Western Petroleum, which was acquired by PDC in May 2022 and represents PDC’s first development plan approval on Great Western acreage. Combined with the Kenosha plan approval, PDC added 99 new wells to its inventory in June and will soon have more than 675 permits and drilled and uncompleted wells. Both fields are in the greater Wattenberg area. The new permits add to an already-established multiyear inventory of projects in the DJ Basin. Kenosha is the second oil and gas development plan to be approved, and the company anticipates further approvals with its Guanella area plan and others. PDC’s operations in the Wattenberg field are focused in the horizontal Niobrara and Codell plays. The Wattenberg represents PDC Energy’s largest asset with more than 85% of its 2021 production and 90% of its year-end 2021 proved reserves.

AbstractThis paper describes the system architecture of a newly constructed radio telescope – the Boolardy engineering test array, which is a prototype of the Australian square kilometre array pathfinder telescope. Phased array feed technology is used to form multiple simultaneous beams per antenna, providing astronomers with unprecedented survey speed. The test array described here is a six-antenna interferometer, fitted with prototype signal processing hardware capable of forming at least nine dual-polarisation beams simultaneously, allowing several square degrees to be imaged in a single pointed observation. The main purpose of the test array is to develop beamforming and wide-field calibration methods for use with the full telescope, but it will also be capable of limited early science demonstrations.

This article investigates the possibilities for understanding waste as a resource, with a particular focus on understanding food waste as a food resource. It considers the popular yeast spread Vegemite within this frame. The spread’s origins in waste product, and how it has achieved and sustained its status as a popular symbol of Australia despite half a century of Australian gastro-multiculturalism and a marked public resistance to other recycling and reuse of food products, have not yet been a focus of study. The process of producing Vegemite from waste would seem to align with contemporary moves towards recycling food waste, and ensuring environmental sustainability and food security, yet even during times of austerity and environmental concern this has not provided the company with a viable marketing strategy. Instead, advertising copywriting and a recurrent cycle of product memorialisation have created a superbrand through focusing on Vegemite’s nutrient and nostalgic value.John Scanlan notes that producing waste is a core feature of modern life, and what we dispose of as surplus to our requirements—whether this comprises material objects or more abstract products such as knowledge—reveals much about our society. In observing this, Scanlan asks us to consider the quite radical idea that waste is central to everything of significance to us: the “possibility that the surprising core of all we value results from (and creates even more) garbage (both the material and the metaphorical)” (9). Others have noted the ambivalent relationship we have with the waste we produce. C. T. Anderson notes that we are both creator and agent of its disposal. It is our ambivalence towards waste, coupled with its ubiquity, that allows waste materials to be described so variously: negatively as garbage, trash and rubbish, or more positively as by-products, leftovers, offcuts, trimmings, and recycled.This ambivalence is also crucial to understanding the affectionate relationship the Australian public have with Vegemite, a relationship that appears to exist in spite of the product’s unpalatable origins in waste. A study of Vegemite reveals that consumers can be comfortable with waste, even to the point of eating recycled waste, as long as that fact remains hidden and unmentioned. In Vegemite’s case not only has the product’s connection to waste been rendered invisible, it has been largely kept out of sight despite considerable media and other attention focusing on the product. Recycling Food Waste into Food ProductRecent work such as Elizabeth Royte’s Garbage Land and Tristram Stuart’s Waste make waste uncomfortably visible, outlining how much waste, and food waste in particular, the Western world generates and how profligately this is disposed of. Their aim is clear: a call to less extravagant and more sustainable practices. The relatively recent interest in reducing our food waste has, of course, introduced more complexity into a simple linear movement from the creation of a food product, to its acquisition or purchase, and then to its consumption and/or its disposal. Moreover, the recycling, reuse and repurposing of what has previously been discarded as waste is reconfiguring the whole idea of what waste is, as well as what value it has. The initiatives that seem to offer the most promise are those that reconfigure the way waste is understood. However, it is not only the process of transforming waste from an abject nuisance into a valued product that is central here. It is also necessary to reconfigure people’s acculturated perceptions of, and reactions to waste. Food waste is generated during all stages of the food cycle: while the raw materials are being grown; while these are being processed; when the resulting food products are being sold; when they are prepared in the home or other kitchen; and when they are only partly consumed. Until recently, the food industry in the West almost universally produced large volumes of solid and liquid waste that not only posed problems of disposal and pollution for the companies involved, but also represented a reckless squandering of total food resources in terms of both nutrient content and valuable biomass for society at large. While this is currently changing, albeit slowly, the by-products of food processing were, and often are, dumped (Stuart). In best-case scenarios, various gardening, farming and industrial processes gather household and commercial food waste for use as animal feed or as components in fertilisers (Delgado et al; Wang et al). This might, on the surface, appear a responsible application of waste, yet the reality is that such food waste often includes perfectly good fruit and vegetables that are not quite the required size, shape or colour, meat trimmings and products (such as offal) that are completely edible but extraneous to processing need, and other high grade product that does not meet certain specifications—such as the mountains of bread crusts sandwich producers discard (Hickman), or food that is still edible but past its ‘sell by date.’ In the last few years, however, mounting public awareness over the issues of world hunger, resource conservation, and the environmental and economic costs associated with food waste has accelerated efforts to make sustainable use of available food supplies and to more efficiently recycle, recover and utilise such needlessly wasted food product. This has fed into and led to multiple new policies, instances of research into, and resultant methods for waste handling and treatment (Laufenberg et al). Most straightforwardly, this involves the use or sale of offcuts, trimmings and unwanted ingredients that are “often of prime quality and are only rejected from the production line as a result of standardisation requirements or retailer specification” from one process for use in another, in such processed foods as soups, baby food or fast food products (Henningsson et al. 505). At a higher level, such recycling seeks to reclaim any reusable substances of significant food value from what could otherwise be thought of as a non-usable waste product. Enacting this is largely dependent on two elements: an available technology and being able to obtain a price or other value for the resultant product that makes the process worthwhile for the recycler to engage in it (Laufenberg et al). An example of the latter is the use of dehydrated restaurant food waste as a feedstuff for finishing pigs, a reuse process with added value for all involved as this process produces both a nutritious food substance as well as a viable way of disposing of restaurant waste (Myer et al). In Japan, laws regarding food waste recycling, which are separate from those governing other organic waste, are ensuring that at least some of food waste is being converted into animal feed, especially for the pigs who are destined for human tables (Stuart). Other recycling/reuse is more complex and involves more lateral thinking, with the by-products from some food processing able to be utilised, for instance, in the production of dyes, toiletries and cosmetics (Henningsson et al), although many argue for the privileging of food production in the recycling of foodstuffs.Brewing is one such process that has been in the reuse spotlight recently as large companies seek to minimise their waste product so as to be able to market their processes as sustainable. In 2009, for example, the giant Foster’s Group (with over 150 brands of beer, wine, spirits and ciders) proudly claimed that it recycled or reused some 91.23% of 171,000 tonnes of operational waste, with only 8.77% of this going to landfill (Foster’s Group). The treatment and recycling of the massive amounts of water used for brewing, rinsing and cooling purposes (Braeken et al.; Fillaudeaua et al.) is of significant interest, and is leading to research into areas as diverse as the development microbial fuel cells—where added bacteria consume the water-soluble brewing wastes, thereby cleaning the water as well as releasing chemical energy that is then converted into electricity (Lagan)—to using nutrient-rich wastewater as the carbon source for creating bioplastics (Yu et al.).In order for the waste-recycling-reuse loop to be closed in the best way for securing food supplies, any new product salvaged and created from food waste has to be both usable, and used, as food (Stuart)—and preferably as a food source for people to consume. There is, however, considerable consumer resistance to such reuse. Resistance to reusing recycled water in Australia has been documented by the CSIRO, which identified negative consumer perception as one of the two primary impediments to water reuse, the other being the fundamental economics of the process (MacDonald & Dyack). This consumer aversion operates even in times of severe water shortages, and despite proof of the cleanliness and safety of the resulting treated water. There was higher consumer acceptance levels for using stormwater rather than recycled water, despite the treated stormwater being shown to have higher concentrations of contaminants (MacDonald & Dyack). This reveals the extent of public resistance to the potential consumption of recycled waste product when it is labelled as such, even when this consumption appears to benefit that public. Vegemite: From Waste Product to Australian IconIn this context, the savoury yeast spread Vegemite provides an example of how food processing waste can be repurposed into a new food product that can gain a high level of consumer acceptability. It has been able to retain this status despite half a century of Australian gastronomic multiculturalism and the wide embrace of a much broader range of foodstuffs. Indeed, Vegemite is so ubiquitous in Australian foodways that it is recognised as an international superbrand, a standing it has been able to maintain despite most consumers from outside Australasia finding it unpalatable (Rozin & Siegal). However, Vegemite’s long product history is one in which its origin as recycled waste has been omitted, or at the very least, consistently marginalised.Vegemite’s history as a consumer product is narrated in a number of accounts, including one on the Kraft website, where the apocryphal and actual blend. What all these narratives agree on is that in the early 1920s Fred Walker—of Fred Walker and Company, Melbourne, canners of meat for export and Australian manufacturers of Bonox branded beef stock beverage—asked his company chemist to emulate Marmite yeast extract (Farrer). The imitation product was based, as was Marmite, on the residue from spent brewer’s yeast. This waste was initially sourced from Melbourne-based Carlton & United Breweries, and flavoured with vegetables, spices and salt (Creswell & Trenoweth). Today, the yeast left after Foster Group’s Australian commercial beer making processes is collected, put through a sieve to remove hop resins, washed to remove any bitterness, then mixed with warm water. The yeast dies from the lack of nutrients in this environment, and enzymes then break down the yeast proteins with the effect that vitamins and minerals are released into the resulting solution. Using centrifugal force, the yeast cell walls are removed, leaving behind a nutrient-rich brown liquid, which is then concentrated into a dark, thick paste using a vacuum process. This is seasoned with significant amounts of salt—although less today than before—and flavoured with vegetable extracts (Richardson).Given its popularity—Vegemite was found in 2009 to be the third most popular brand in Australia (Brand Asset Consulting)—it is unsurprising to find that the product has a significant history as an object of study in popular culture (Fiske et al; White), as a marker of national identity (Ivory; Renne; Rozin & Siegal; Richardson; Harper & White) and as an iconic Australian food, brand and product (Cozzolino; Luck; Khamis; Symons). Jars, packaging and product advertising are collected by Australian institutions such as Sydney’s Powerhouse Museum and the National Museum of Australia in Canberra, and are regularly included in permanent and travelling exhibitions profiling Australian brands and investigating how a sense of national identity is expressed through identification with these brands. All of this significant study largely focuses on how, when and by whom the product has been taken up, and how it has been consumed, rather than its links to waste, and what this circumstance could add to current thinking about recycling of food waste into other food products.It is worth noting that Vegemite was not an initial success in the Australian marketplace, but this does not seem due to an adverse public perception to waste. Indeed, when it was first produced it was in imitation of an already popular product well-known to be made from brewery by-products, hence this origin was not an issue. It was also introduced during a time when consumer relationships to waste were quite unlike today, and thrifty re-use of was a common feature of household behaviour. Despite a national competition mounted to name the product (Richardson), Marmite continued to attract more purchasers after Vegemite’s launch in 1923, so much so that in 1928, in an attempt to differentiate itself from Marmite, Vegemite was renamed “Parwill—the all Australian product” (punning on the idea that “Ma-might” but “Pa-will”) (White 16). When this campaign was unsuccessful, the original, consumer-suggested name was reinstated, but sales still lagged behind its UK-owned prototype. It was only after remaining in production for more than a decade, and after two successful marketing campaigns in the second half of the 1930s that the Vegemite brand gained some market traction. The first of these was in 1935 and 1936, when a free jar of Vegemite was offered with every sale of an item from the relatively extensive Kraft-Walker product list (after Walker’s company merged with Kraft) (White). The second was an attention-grabbing contest held in 1937, which invited consumers to compose Vegemite-inspired limericks. However, it was not the nature of the product itself or even the task set by the competition which captured mass attention, but the prize of a desirable, exotic and valuable imported Pontiac car (Richardson 61; Superbrands).Since that time, multinational media company, J Walter Thompson (now rebranded as JWT) has continued to manage Vegemite’s marketing. JWT’s marketing has never looked to Vegemite’s status as a thrifty recycler of waste as a viable marketing strategy, even in periods of austerity (such as the Depression years and the Second World War) or in more recent times of environmental concern. Instead, advertising copywriting and a recurrent cycle of cultural/media memorialisation have created a superbrand by focusing on two factors: its nutrient value and, as the brand became more established, its status as national icon. Throughout the regular noting and celebration of anniversaries of its initial invention and launch, with various commemorative events and products marking each of these product ‘birthdays,’ Vegemite’s status as recycled waste product has never been more than mentioned. Even when its 60th anniversary was marked in 1983 with the laying of a permanent plaque in Kerferd Road, South Melbourne, opposite Walker’s original factory, there was only the most passing reference to how, and from what, the product manufactured at the site was made. This remained the case when the site itself was prioritised for heritage listing almost twenty years later in 2001 (City of Port Phillip).Shying away from the reality of this successful example of recycling food waste into food was still the case in 1990, when Kraft Foods held a nationwide public campaign to recover past styles of Vegemite containers and packaging, and then donated their collection to Powerhouse Museum. The Powerhouse then held an exhibition of the receptacles and the historical promotional material in 1991, tracing the development of the product’s presentation (Powerhouse Museum), an occasion that dovetailed with other nostalgic commemorative activities around the product’s 70th birthday. Although the production process was noted in the exhibition, it is noteworthy that the possibilities for recycling a number of the styles of jars, as either containers with reusable lids or as drinking glasses, were given considerably more notice than the product’s origins as a recycled product. By this time, it seems, Vegemite had become so incorporated into Australian popular memory as a product in its own right, and with such a rich nostalgic history, that its origins were no longer of any significant interest or relevance.This disregard continued in the commemorative volume, The Vegemite Cookbook. With some ninety recipes and recipe ideas, the collection contains an almost unimaginably wide range of ways to use Vegemite as an ingredient. There are recipes on how to make the definitive Vegemite toast soldiers and Vegemite crumpets, as well as adaptations of foreign cuisines including pastas and risottos, stroganoffs, tacos, chilli con carne, frijole dip, marinated beef “souvlaki style,” “Indian-style” chicken wings, curries, Asian stir-fries, Indonesian gado-gado and a number of Chinese inspired dishes. Although the cookbook includes a timeline of product history illustrated with images from the major advertising campaigns that runs across 30 pages of the book, this timeline history emphasises the technological achievement of Vegemite’s creation, as opposed to the matter from which it orginated: “In a Spartan room in Albert Park Melbourne, 20 year-old food technologist Cyril P. Callister employed by Fred Walker, conducted initial experiments with yeast. His workplace was neither kitchen nor laboratory. … It was not long before this rather ordinary room yielded an extra-ordinary substance” (2). The Big Vegemite Party Book, described on its cover as “a great book for the Vegemite fan … with lots of old advertisements from magazines and newspapers,” is even more openly nostalgic, but similarly includes very little regarding Vegemite’s obviously potentially unpalatable genesis in waste.Such commemorations have continued into the new century, each one becoming more self-referential and more obviously a marketing strategy. In 2003, Vegemite celebrated its 80th birthday with the launch of the “Spread the Smile” campaign, seeking to record the childhood reminisces of adults who loved Vegemite. After this, the commemorative anniversaries broke free from even the date of its original invention and launch, and began to celebrate other major dates in the product’s life. In this way, Kraft made major news headlines when it announced that it was trying to locate the children who featured in the 1954 “Happy little Vegemites” campaign as part of the company’s celebrations of the 50th anniversary of the television advertisement. In October 2006, these once child actors joined a number of past and current Kraft employees to celebrate the supposed production of the one-billionth jar of Vegemite (Rood, "Vegemite Spreads" & "Vegemite Toasts") but, once again, little about the actual production process was discussed. In 2007, the then iconic marching band image was resituated into a contemporary setting—presumably to mobilise both the original messages (nutritious wholesomeness in an Australian domestic context) as well as its heritage appeal. Despite the real interest at this time in recycling and waste reduction, the silence over Vegemite’s status as recycled, repurposed food waste product continued.Concluding Remarks: Towards Considering Waste as a ResourceIn most parts of the Western world, including Australia, food waste is formally (in policy) and informally (by consumers) classified, disposed of, or otherwise treated alongside garden waste and other organic materials. Disposal by individuals, industry or local governments includes a range of options, from dumping to composting or breaking down in anaerobic digestion systems into materials for fertiliser, with food waste given no special status or priority. Despite current concerns regarding the security of food supplies in the West and decades of recognising that there are sections of all societies where people do not have enough to eat, it seems that recycling food waste into food that people can consume remains one of the last and least palatable solutions to these problems. This brief study of Vegemite has attempted to show how, despite the growing interest in recycling and sustainability, the focus in both the marketing of, and public interest in, this iconic and popular product appears to remain rooted in Vegemite’s nutrient and nostalgic value and its status as a brand, and firmly away from any suggestion of innovative and prudent reuse of waste product. That this is so for an already popular product suggests that any initiatives that wish to move in this direction must first reconfigure not only the way waste itself is seen—as a valuable product to be used, rather than as a troublesome nuisance to be disposed of—but also our own understandings of, and reactions to, waste itself.Acknowledgements Many thanks to the reviewers for their perceptive, useful, and generous comments on this article. All errors are, of course, my own. The research for this work was carried out with funding from the Faculty of Arts, Business, Informatics and Education, CQUniversity, Australia.ReferencesAnderson, C. T. “Sacred Waste: Ecology, Spirit, and the American Garbage Poem.” Interdisciplinary Studies in Literature and Environment 17 (2010): 35-60.Blake, J. The Vegemite Cookbook: Delicious Recipe Ideas. Melbourne: Ark Publishing, 1992.Braeken, L., B. Van der Bruggen and C. Vandecasteele. “Regeneration of Brewery Waste Water Using Nanofiltration.” Water Research 38.13 (July 2004): 3075-82.City of Port Phillip. “Heritage Recognition Strategy”. Community and Services Development Committee Agenda, 20 Aug. 2001.Cozzolino, M. Symbols of Australia. Ringwood: Penguin, 1980.Creswell, T., and S. Trenoweth. “Cyril Callister: The Happiest Little Vegemite”. 1001 Australians You Should Know. North Melbourne: Pluto Press, 2006. 353-4.Delgado, C. L., M. Rosegrant, H. Steinfled, S. Ehui, and C. Courbois. Livestock to 2020: The Next Food Revolution. Food, Agriculture, and the Environment Discussion Paper, 28. Washington, D. C.: International Food Policy Research Institute, 2009.Farrer, K. T. H. “Callister, Cyril Percy (1893-1949)”. Australian Dictionary of Biography 7. Melbourne: Melbourne University Press, 1979. 527-8.Fillaudeaua, L., P. Blanpain-Avetb and G. Daufinc. “Water, Wastewater and Waste Management in Brewing Industries”. Journal of Cleaner Production 14.5 (2006): 463-71.Fiske, J., B. Hodge and G. Turner. Myths of Oz: Reading Australian Popular Culture. Sydney: Allen & Unwin, 1987.Foster’s Group Limited. Transforming Fosters: Sustainability Report 2009.16 June 2010 ‹http://fosters.ice4.interactiveinvestor.com.au/Fosters0902/2009SustainabilityReport/EN/body.aspx?z=1&p=-1&v=2&uid›.George Patterson Young and Rubicam (GPYR). Brand Asset Valuator, 2009. 6 Aug. 2010 ‹http://www.brandassetconsulting.com/›.Harper, M., and R. White. Symbols of Australia. UNSW, Sydney: UNSW Press, 2010.Henningsson, S., K. Hyde, A. Smith, and M. Campbell. “The Value of Resource Efficiency in the Food Industry: A Waste Minimisation Project in East Anglia, UK”. Journal of Cleaner Production 12.5 (June 2004): 505-12.Hickman, M. “Exposed: The Big Waste Scandal”. The Independent, 9 July 2009. 18 June 2010 ‹http://www.independent.co.uk/life-style/food-and-drink/features/exposed-the-big-waste-scandal-1737712.html›.Ivory, K. “Australia’s Vegemite”. Hemispheres (Jan. 1998): 83-5.Khamis, S. “Buy Australiana: Diggers, Drovers and Vegemite”. Write/Up. Eds. E. Hartrick, R. Hogg and S. Supski. St Lucia: API Network and UQP, 2004. 121-30.Lagan, B. “Australia Finds a New Power Source—Beer”. The Times 5 May 2007. 18 June 2010 ‹http://www.timesonline.co.uk/tol/news/science/article1749835.ece›.Laufenberg, G., B. Kunz and M. Nystroem. “Transformation of Vegetable Waste into Value Added Products: (A) The Upgrading Concept; (B) Practical Implementations [review paper].” Bioresource Technology 87 (2003): 167-98.Luck, P. Australian Icons: Things That Make Us What We Are. Melbourne: William Heinemann Australia, 1992.MacDonald, D. H., and B. Dyack. Exploring the Institutional Impediments to Conservation and Water Reuse—National Issues: Report for the Australian Water Conservation and Reuse Research Program. March. CSIRO Land and Water, 2004.Myer, R. O., J. H. Brendemuhl, and D. D. Johnson. “Evaluation of Dehydrated Restaurant Food Waste Products as Feedstuffs for Finishing Pigs”. Journal of Animal Science 77.3 (1999): 685-92.Pittaway, M. The Big Vegemite Party Book. Melbourne: Hill of Content, 1992. Powerhouse Museum. Collection & Research. 16 June 2010.Renne, E. P. “All Right, Vegemite!: The Everyday Constitution of an Australian National Identity”. Visual Anthropology 6.2 (1993): 139-55.Richardson, K. “Vegemite, Soldiers, and Rosy Cheeks”. Gastronomica 3.4 (Fall 2003): 60-2.Rood, D. “Vegemite Spreads the News of a Happy Little Milestone”. Sydney Morning Herald 6 Oct. 2008. 16 March 2010 ‹http://www.smh.com.au/news/national/vegemite-spreads-the-news-of-a-happy-little-milestone/2008/10/05/1223145175371.html›.———. “Vegemite Toasts a Billion Jars”. The Age 6 Oct. 2008. 16 March 2010 ‹http://www.theage.com.au/national/vegemite-toasts-a-billion-jars-20081005-4uc1.html›.Royte, E. Garbage Land: On the Secret Trail of Trash. New York: Back Bay Books, 2006.Rozin, P., and M. Siegal “Vegemite as a Marker of National Identity”. Gastronomica 3.4 (Fall 2003): 63-7.Scanlan, J. On Garbage. London: Reaktion Books, 2005.Stuart, T. Waste: Uncovering the Global Food Scandal. New York: W. W. Norton & Company, 2009.Superbrands. Superbrands: An Insight into Many of Australia’s Most Trusted Brands. Vol IV. Ingleside, NSW: Superbrands, 2004.Symons, M. One Continuous Picnic: A History of Eating in Australia. Ringwood: Penguin Books, 1982.Wang, J., O. Stabnikova, V. Ivanov, S. T. Tay, and J. Tay. “Intensive Aerobic Bioconversion of Sewage Sludge and Food Waste into Fertiliser”. Waste Management & Research 21 (2003): 405-15.White, R. S. “Popular Culture as the Everyday: A Brief Cultural History of Vegemite”. Australian Popular Culture. Ed. I. Craven. Cambridge UP, 1994. 15-21.Yu, P. H., H. Chua, A. L. Huang, W. Lo, and G. Q. Chen. “Conversion of Food Industrial Wastes into Bioplastics”. Applied Biochemistry and Biotechnology 70-72.1 (March 1998): 603-14.

Freight rail carriers have been continuously challenged to reduce costs and comply with increasingly stringent environmental standards, into a continuously competing and environmentally driven industry. In this context, current availability and relative abundance of clean and low cost non conventional gas reserves have aroused a comprehensive reevaluation of rail industry into fuel option, especially where freight rail are strongly diesel based. Countries in which rail sector is required to play an important role in transport matrix, where fuel expenditures currently accounts for a significant share of operational costs, like Australia, Brazil, United States and other continental countries, can be seen as strong candidates to adopt fuel alternatives to diesel fueled freight railways. Moreover, from an environmental perspective, the use of alternative fuels (like natural gas) for locomotive traction may allow rail freight carriers to comply with emission standards into a less technologically complex and costly way. In this context, liquefied natural gas (LNG) fueled freight locomotives are seen as a strong potential near-term driver for natural gas use in rail sector, with its intrinsic cost and environmental benefits and with the potential to revolutionize rail industry much like the transition from steam to diesel experienced into the fifties, as well as the more recent advent of use of alternating current diesel-electric locomotives. LNG rail fueled approach has been focused on both retrofitting existing locomotive diesel engines, as well as on original manufactured engines. Given the lower polluting potential of natural gas heavy engines, when compared to diesel counterparts, LNG locomotives can be used to comply with increasingly restrictive Particulate Matter (PM) and Nitrogen Oxides (NOx) emission standards with less technological complexity (engine design and aftertreatment hardware) and their intrinsic lower associated costs. Prior to commercial operation of LNG locomotives, there are some technical, operational and economic hurdles that need to be addressed, i.e. : i) locomotive engine and fuel tender car technological maturity and reliability improvement; ii) regulation improvement, basically focused on operational safety and interchange operations; iii) current and long term diesel - gas price differential, a decisive driver, and, finally, iv) LNG infrastructure requirements (fueling facilities, locomotives and tender car specifications). This work involved an extensive research into already published works to present an overview of LNG use in freight rail industry into a technical, operational and economical perspective, followed by a critical evaluation of its potential into some relevant freight rail markets, such as United States, Brazil and Australia, as well as some European non electrified rail freight lines.

Abstract Some 10 incidents of low strain in-service and pre-service hydrotest failures in girth welds have been reported in North America since the Enterprise Products ethane pipeline failure in 2015. No such failures have been reported in Australia, despite the similarities in Standards, the line pipe data, and the use of manual SMAW using fully cellulosic procedures. There are however significant differences that warrant further investigation and adoption in terms of best practice to ensure the security and safety of our pipeline networks. Some unique differences and observations in terms of pipe properties, weld qualification procedures, test methods and even full scale pressure burst tests before and after coating are described to highlight subtle differences in the standards that may provide clarity in explaining pipeline girth weld failures and it is anticipated may also provide guidance for the future.