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Semisolid metal forming has now been accepted as a viable technology for production of components with complex shape and high integrity. The advantages of semisolid metal forming can only be achieved when the feedstock material has a non-dendritic semisolid structure. A controlled nucleation method has been developed to produce such structures for semisolid forming. By controlling grain nucleation method and growth, fine-grained and non-dendritic microstructures that are suitable for semisolid casting can be generated. The method was applied to hypoeutectic and hypereutectic Al-Si casting alloys, Al wrought alloys and a Mg alloy. Parameters such as pouring temperature, cooling rate and grain refiner addition were controlled to achieve copious nucleation, nuclei survival and dendritic growth suppression during solidification. The influe...
We seek in this paper to reflect briefly on one example of the informal collaborations in which we are involved directly: the Australian Traveller education research team. Our research team and all the others like it encapsulate the seemingly increasingly threatened possibilities and safeguards for achieving research and publishing outcomes in contemporary universities. If those outcomes are to be productive, sustainable and hopefully beneficial for the multiple stakeholders with their convergent and competing interests identified above – particularly the research participants – strategies of this kind would appear to be among our best hopes for bringing such outcomes about.
Soil anchors are commonly used as foundation systems for structures that require uplift or lateral resistance. These types of structures include transmission towers, sheet pile walls and buried pipelines. Although anchors are typically complex in shape (e.g. drag or helical anchors), many previous analyses idealise the anchor as a continuous strip under plane strain conditions. This assumption provides numerical advantages and the problem can solved in two dimensions. In contrast to recent numerical studies, this paper applies three dimensional numerical limit analysis and axi-symetrical displacement finite element analysis to evaluate the effect of anchor shape on the pullout capacity of horizontal anchors in sand. The anchor is idealised as either square or circular in shape. Results are presented in the familiar form of breakout fa...
Scientific and social (economic and ethical) dimensions of occupational health and safety (OH&S) are discussed. Three broad stages in the development of ethics in Western society are analysed in order to assist in understanding the arrival of moral relativism and constructivism under postmodernism. Against this background three recent stages in the emergence of OH&S are outlined and OH&S is shown to be of key importance to sustainable development. Comment is made about the prospects for survival, under moral relativism, of the duty of care ethic which lies at the heart of OH&S and which has until the present time catalysed professionally responsible innovation and change. It is argued that (1) because OH&S tools and techniques called up in legislation are scientific in nature and apply equally to all under law, and (2) because OH&S is ...
[Abstract]: A straightforward three-point quadrature formula of closed type is derived that improves on Simpson's rule. Just using the additional information of the integrand's derivative at the two endpoints we show the error is sixth order in grid spacing. Various error bounds for the quadrature formula are obtained to quantify more precisely the errors. Applications in numerical integration are given. With these error bounds, which are generally better than the usual Peano bounds, the composite formulas can be applied to integrands with lower order derivatives.
The major problem of sustainability for most charities and philanthropic organisations is that they do not produce commercially viable outputs. The problem is highlighted by the fact that many not-for-profit organisations that do produce a saleable commodity, such as sports clubs, stock exchanges, insurance clubs and community banks frequently convert to for-profit organisations. Those that cannot or do not produce saleable commodities rely on donations from individuals, organisations and governments, for which they cannot usually offer any direct exchange of goods. Nevertheless these organisations provide vital services such as family welfare services and counselling, and emergency relief. They provide both public and private goods that caring societies desire, but these providing organisations have enormous difficulties is sustaining...
Defra stated that UK organisations could make £7m a day in energy efficiency savings, equating to £25 billion worth of cost reductions for UK plc. Energy is currently a cheap commodity and even with smart energy procurement most organisations could be wasting up to 40% of their spend. We will show you firsthand examples of how organisations have transformed their energy and cost base through integrated carbon reduction strategies with little or no upfront investment. With the recent Energy Market Review (EMR) and the government putting a carbon floor price in place, energy costs are likely to dramatically increase over the next few years. Finance officers are now responsible for the vital role of reducing energy (carbon) costs whilst managing cost volatility and meeting government targets and reporting requirements. Your challenge is...
Many small financial institutions (SFIs) in developing countries make great effort to provide efficient services to the poorhouse holders. It is generally accepted that maintaining the financial strength which is importance in corporate governance mechanism of institutions, has a close relationship with the efficiency of financial institutions, although they are small. However, there is a doubt of efficiency of SFIs in developing countries due to not maintaining appropriate financial practices. In Sri Lanka, recent collapses of many financial institutions also signal that they do not maintain sound financial practices. Cooperative rural banks in Sri Lanka (CRBs) one of the formal SFIs in Sri Lanka which serve a large number of customers, deal with a large amount of funds and have substantial contributions to the rural financial sec...
The term evaluation applied to engineering education has several connotations. Evaluation occurs at multiple levels. At the course level academics routinely evaluate 'technical' learning outcomes. These courses in turn routinely need to meet evaluation criteria set by individual institutions, such as graduate attributes, grade distributions, minimum load, student satisfaction, cohort progression and attrition. Further, at the program level, coordinators may be concerned with evaluation of total student load, overall progression and attrition, retention startegies, employer surveys, and various quality indices. The capstone is the evaluation carried out by Engineers Australia, which is (partially) based on satisfying the graduate competency requirements of the Washington Accord (as interpreted and applied by Engineers Australia). This p...
An history of Centre Pivots and Lateral Moves and their use in Australia is followed by a range of an equipment overview, a section on measuring the performance of these machines, a section on their system capacity, practical management tips and 29 references.
Want to know more?If you want to know more about this cutting edge product, or schedule a demonstration on your own organisation, please feel free to contact us or read the available documentation at http://www.keep.pt/produtos/retrievo/?lang=en