Machining of titanium alloy (Ti-6Al-4V)-theory to application

This article correlates laboratory-based understanding in machining of titanium alloys with the industry based outputs and finds possible solutions to improve machining efficiency of titanium alloy Ti-6Al-4V. The machining outputs are explained based on different aspects of chip formation mechanism and practical issues faced by industries during titanium machining. This study also analyzed and linked the methods that effectively improve the machinability of titanium alloys. It is found that the deformation mechanism during machining of titanium alloys is complex and causes basic challenges, such as sawtooth chips, high temperature, high stress on cutting tool, high tool wear and undercut parts. These challenges are correlated and affected by each other. Sawtooth chips cause variation in cutting forces which results in high cyclic stress on cutting tools. On the other hand, low thermal conductivity of titanium alloy causes high temperature. These cause a favorable environment for high tool wear. Thus, improvements in machining titanium alloy depend mainly on overcoming the complexities associated with the inherent properties of this alloy. Vibration analysis kit, high pressure coolant, cryogenic cooling, thermally enhanced machining, hybrid machining and, use of high conductive cutting tool and tool holders improve the machinability of titanium alloy.

Impacts of wear and geometry response of the cutting tool on machinability of super austenitic stainless steel

This paper presents a study of tool wear and geometry response whenmachinability tests were applied under milling operations onthe Super Austenitic Stainless Steel alloy AL-6XN. Eight milling trials were executed under two cutting speeds, two feed rates, andtwo depths of cuts. Cutting edge profile measurements were performed to reveal response of cutting edge geometry to the cuttingparameters and wear. A scanning electron microscope (SEM) was used to inspect the cutting edges. Results showed the presenceof various types of wear such as adhesion wear and abrasion wear on the tool rake and flank faces. Adhesion wear represents theformation of the built-up edge, crater wear, and chipping, whereas abrasion wear represents flank wear.Thecommonly formed wearwas crater wear. Therefore, the optimum tool life among the executed cutting trails was identified according to minimum lengthand depth of the crater wear.The profile measurements showed the formation of new geometries for the worn cutting edges due toadhesion and abrasion wear and the cutting parameters.The formation of the built-up edge was observed on the rake face of thecutting tool. The microstructure of the built-up edge was investigated using SEM. The built-up edge was found to have the austeniteshear lamellar structure which is identical to the formed shear lamellae of the produced chip.

Agents and data mining: mutual enhancement by integration

This paper tells a story of synergism of two cutting edge technologies — agents and data mining. By integrating these two technologies, the power for each of them is enhanced. Integrating agents into data mining systems, or constructing data mining systems from agent perspectives, the flexibility of data mining systems can be greatly improved. New data mining techniques can add to the systems dynamically in the form of agents, while the out-of-date ones can also be deleted from systems at run-time. Equipping agents with data mining capabilities, the agents are much smarter and more adaptable. In this way, the performance of these agent systems can be improved. A new way to integrate these two techniques –ontology-based integration is also discussed. Case studies will be given to demonstrate such mutual enhancement.

Youth and sexualities : pleasure, subversion and insubordination in and out of schools

These cutting-edge international essays challenge dominant narratives of queer youth predicated on oppression and victimization. As school systems address the emergence of Gay-Straight Alliances and calls to provide equal educational access, researchers, educators and youth workers are paying increasing attention to sexuality, gender and schooling. Yet present discourses are limited to liberal understandings of tolerance, safety, and equity that are defined by a separation of "queer" and "normal." This text documents and offers radical interpretations of the creativity of queer youth in challenging existing practices. Interdisciplinary analyses offer multiple vantage points for reconceptualizing adolescent sexual subjectivities and institutional and cultural practices.

The challenges for quality managers in Britain and Australia

Purpose – This paper aims to compare and contrast the career experiences and development needs of British and Australian quality managers.

Design/methodology/approach – The results of a postal survey of the careers of British quality managers are compared with Australian quality managers based on two surveys.

Findings – The study finds that quality managers in both countries brought wide functional experience to their roles. Their current jobs are major sources of intrinsic job satisfaction for both groups of managers but they utilise a very limited range of quality tools. Also British and Australian managers show little awareness in terms of their development needs for a broader background in quality.

Practical implications – The findings suggest a worrying lack of innovatory zeal amongst quality managers who appear to be more concerned with the maintenance of standards rather than taking a more dynamic approach. Thus it is argued that while quality managers bring wide functional experience to their current roles, there are many who do not appear to be at the cutting edge of knowledge in their field. Neither do the British quality managers in particular appear to be sufficiently aware of the need to address such shortfalls through professional development opportunities.

Originality/value – The roles of those charged with carrying the flag of quality in the two countries have only previously received limited research coverage. This paper, based upon empirical research in Britain and Australia, identifies issues which require the attention of senior management to ensure future competitiveness for their organisations.

Journal impact factors: implications for the nursing profession

Background: The journal impact factor (IF) has become widely used as an absolute measure of the quality of professional journals. It is also increasingly used as a tool for measuring the academic performance of researchers and to inform decisions concerning the appointment and tenure of academic staff as well as the viability of their departments/schools. In keeping with these IF-related trends, nurse researchers and faculty the world over are being increasingly expected to publish only in journals that have a high IF and to abandon all other forms of publishing (including books and book chapters) that do not attract IF rankings.

Issues: The IF obsession is placing in jeopardy the sustainability and hence viability of nursing journals and academic nursing publication lists (academic texts). If nurse authors abandon their publishing agenda and publish only in 'elite' journals (many of which may be outside nursing), the capacity of the nursing profession to develop and control the cutting edge of its disciplinary knowledge could be placed at risk.

Actions: Other means for assessing the quality and impact of nursing journals need to be devised. In addition, other works (such as books and book chapters) need also to be included in quality metrics. Nurse authors and journal editors must work together and devise ways to ensure the sustainability and viability of nursing publications.

Stadia and facilities

Football is big business - the biggest sport on the planet, it has seen a massive commercial boom over the last twenty years which has resulted in it being worth $12 billion per annum, globally. Managing Football is the first book to respond to the growing professionalisation of the sport and the need for a text which both students on sport management courses and practitioners in the field can use. Expertly edited by two well known specialists in football management, it draws together the work of a world-class contributor team to form a comprehensive diagnosis of the most important issues facing football managers across the world, providing the reader with: * Cutting edge analysis of all the important issues in the football industry and the management of football * A clear and structured presentation and examination of key issues in football internationally * A strong balance of academic and practitioner analysis and comment * A strong pedagogy and structure allowing the material to be navigated easily by the reader * Global coverage of the football markets including England, Spain, France, Italy, Germany, Australia, North America, United Arab Emirates, China, South Africa, Argentina, Netherlands, Mexico, South America, Russia. Managing Football is simply a must-read for anyone studying or working in football management and is set to be an important landmark in this rapidly moving and globally expansive field.

Aligning school reform and teacher education reform in the middle years : an australian case study

This paper discusses the development of a new Bachelor of Education (Middle Years of Schooling) at The University of Queensland. The middle years of schooling have increasingly been the focus of education reform initiatives in Australia, but this has not been accompanied by significant increases in the number of teacher education institutions offering specialised middle schooling-level teacher preparation programmes. Considering the rapidly changing social and economic context and the emergent state of middle schooling in Australia, the programme represented a conceptual and practical opportunity and challenge for The University of Queensland team. Working collaboratively, the team sought to design a teacher education preservice programme that was both responsive and generative: that is, responsive to local school contexts and to current educational research and reform at national and international levels; and generative of cutting-edge theories and practices associated with middle schooling, teachers' work, and teacher education. This paper focuses on one component of the Middle Years of Schooling Teacher Education programme at The University of Queensland; namely, the practicum. We first present the underlying principles of the practicum programme and then examine "dilemmas" that emerged early in the practicum. These issues and tensions were associated with the ideals of "middle years" philosophy and the pragmatics of school reform associated with that new approach. In this paper, and within this context, we explore what it means to be both responsive and generative, and describe how we as teacher educators negotiated between the extremes these terms implied.

Revelation International Film Festival (11th : 2008 : Perth, WA.)

Machinima revelations presents cutting-edge machinima experiments from around the world. Machinima is filmaking by combining the techniques of filmaking, animation production and the technology of real-time 3D game technologies.  Machinima Revelations curator Dr Leon Marvell from Deakin University presented cutting-edge machinima experiments from around the world and Australia, including the award-winning feature-length machinima, Stolen Life by Australian pioneer Peter Rasmussen

Achieving the millennium development goals

"This book provides cutting-edge analytical insights into if and how the stated aims are likely to be achieved. The volume presents empirical analyses of key determinants of the MDG target variables which recognize that most of the MDG targets are endogenously related. These interdependencies are crucial not only in analysing the MDGs but also devising strategies aimed at their achievement."--BOOK JACKET.

Animal migration : linking models and data beyond taxonomic limits

An international workshop on animal migration was held at the Lorentz Center in Leiden, The Netherlands, 2–6 March 2009, bringing together leading theoreticians and empiricists from the major migratory taxa, aiming at the identification of cutting-edge questions in migration research that cross taxonomic borders.

User satisfaction in sustainable office buildings : a preliminary study

Energy efficiency was first mandated for commercial buildings in 2006 in Part J of The Building Code of Australia (BCA) and regulators are already implementing increased measures in 2010 (ABCB 2010). Further increases will follow as part of the co-ordinated effort to reduce building related greenhouse gas emissions. The introduction of the Energy Efficiency Disclosure Bill 2010 will establish a national scheme to promote the disclosure of information about the energy efficiency of office buildings as well as further highlighting the need for efficiency. Increased energy efficiency in the form of insulation, energy efficient light fittings, sophisticated Building Management Systems (BMS), micro-generation such as solar and wind turbines all result in measurable quantifiable reductions in operating costs for owners and tenants. However convincing all building owners about the sound business case for adopting sustainability measures has not been fully realised. To-date the adoption of cutting edge sustainable buildings in Australia is restricted to a few industry leaders, such as Investa and ISPT in Victoria for example. Sustainable building owners and tenants often benefit from reduced operating costs during the building lifecycle although the ‘intangible’ effect on businesses (e.g. employee productivity) is uncertain. This aspect has not been accurately quantified and has not been included as part of the measurement of sustainability in buildings.

This study will allow property stakeholders, including government policy-makers and investors/developers, to better understand the optimal type and level of sustainability to be incorporated into the built environment. In addition this knowledge will enable policymakers to make more informed decisions with regards to the likely impact of the legislative measures they propose in respect of sustainability and buildings in The Building Code of Australia (BCA) and other relevant legislation.