Load balance algorithms for anycast

Increasingly, replicated anycast servers are being used to deliver network applications and service ever increasing user requests. Therefore, the strategies used to guarantee network bandwidth prerequisites and perform load balancing across the nodes of an anycast group are critical to the performance of online applications. In this paper, we model user requests, network congestion and latency, and server load using a combination of hydro-dynamics and queuing theory to develop an efficient job distribution strategy. Current, anycast research does not explicitly consider the system load of nodes within an anycast groups when distributing requests. Therefore, the performance of a heavily loaded anycast system can quickly become congested and uneven as jobs are routed to closely linked nodes which are already saturated with requests. In comparison, the nodes of further away systems remain relatively unused because of other issues such as network bandwidth and latency during these times. Our system redirects requests from busy systems to the idle, remotely linked nodes, to process requests faster in spite of slower network access. Using an empirical study, we show this technique can improve request performance, and throughput with minimal network probing overhead.

Do as I say, not as I do: Ralph Greenson, Anna Freud, and superrich patients

Ralph Greenson's The Technique and Practice of Psychoanalysis acted as a bible for generations of analysts on what to do and what not to do in psychoanalysis. Yet Greenson ignored the strictures of his own textbook, The Technique and Practice of Psychoanalysis, in his treatment of a number of superrich patients and celebrities, such as Marilyn Monroe and Lita Annenberg Hazen. This article presents new evidence from the examination of the papers of Ralph Greenson and Anna Freud at UCLA and the Library of Congress. Although it is well known that Greenson stretched boundaries with Monroe, his practice of blurring boundaries with other patients, and helping to funnel their money to Anna Freud's Hampstead Center, is not known. Hazen was not only President of Greenson's Foundation for Research in Psychoanalysis but was also, through Greenson's encouragement, a major contributor to Anna Freud's Hampstead Center. Greenson even went so far as to answer a personal advertisement on her behalf and fly to New York for a weekend to interview the suitor. These activities took place with Anna Freud's knowledge, approval, and collusion. Other cases are also discussed. If only he had taken his own advice.

The telling of violence : organizational change and atrocity tales

This paper explores the retrospective construction of atrocity narratives of organizational change in primary industries of the Latrobe Valley, located in southeast Australia. Within their narratives, participants discuss various forms of workplace violence aimed at employees by management and, in some cases, other employees. In addition, shifting narratives from violence to resignation are explored. As all participants are no longer employed in the organizations described in the narratives, causal associations between workplace violence and resignation choices are of particular interest. In this context, atrocity narratives are presented in a deliberate effort to extend the theorizing of organizational change into domains that are neither attractive nor progressive.

Income tax test, materials & essential cases

A comprehensive cases and materials book intended for commerce or law students undertaking semester-length courses in Australian income tax law.

Income taxation commentary and materials

The formula of this established text remains the same in this new edition. The last section (entities and international) has been expanded along the lines of the first and second editions with discrete chapters to replace the amalgamated chapters for 'international' and 'entities'.

The prevalence and selected characteristics of non-fatal opioid overdoses attended by ambulance in Australia

Key Points
1. Ambulance attendance at non-fatal opioid overdose is a common event in mainland Australia (among heroin users in particular).
2. The monthly rate of non-fatal opioid overdose attended by ambulance was generally highest in Victoria (Melbourne) followed by NSW with the rates substantially lower in the remaining mainland states over the period Jan  1999 - Feb 2001.
3. Non-fatal opioid overdose victims were most likely to be male in all states with the proportion of males highest in Victoria (77%).
4. Non-fatal opioid overdose victims were aged around 28 years with ages lowest in WA (26) and highest in NSW (30).
5. The rates of transportation varied according to ambulance service practice across the states with around 94% of cases transported in WA and around 19% and 30% of cases transported in Melbourne and NSW respectively.

Young people and the internet : what is the solution?

New Technology is an important aspect of society, but the impact of new technology has changed the way in which society can view and deal with many traditional issues. Young people have access to the internet and in many cases are left to their own devices and free to explore a variety of sites via the internet, even if the content is unsuitable. The paper will explore the issue of how to control the internet and how young people deal with the Internet. The paper will explore the issues of government and also school in helping young people with these new challenges.

Why do young women drop out of sport and physical activity? A social ecological approach

This study explored significant individual, social, and environmental factors and how they interact to influence participation in physical activity for adolescent young women. These factors were explored at two transitional life stages: from primary to secondary school and from middle to upper years at secondary school. Ten focus groups with young women and 10 interviews with teachers were conducted and multiple, interrelated themes emerged. Our findings indicated that there are a number of strategies that could be undertaken to increase the participation of young women in physical activity. These include: (1) enhancing intrinsic motivation for sport and physical activity; (2) appealing to young women’s need for socialising through opportunities for informal physical activity; (3) educating parents about the benefits of sport and physical activity; (4) overcoming gender stereotypes about what is acceptable behaviour for young women; (5) improving physical education teachers’ understanding of gender issues and motivating less physically active students; (6) the provision of accessible sport and physical activity facilities, programs, and services in schools; and (7) prioritorisation of sport and physical activity in the school curriculum. These strategies are not ‘quick fixes’, but rather require a whole-ofcommunity approach and, in some cases, a reorientation of societal values.

Effect of load pattern on solar-boosted heat pump water heater performance

The performance of a solar-boosted heat pump water heater (HPWH) operating under full load and part load conditions was determined in an outdoor experimental study. The system utilised flat unglazed aluminium solar evaporator panels to absorb solar and ambient energy. Absorbed energy was transferred to the water tank by means of the heat pump and a wrap around condenser coil on the outside of the tank. The system COP was found to be in the range of 5–7 under clear daytime conditions and 3–5 under clear night-time conditions. Using part load testing of the HPWH system it was found that concentrating the coils in the lower portion of the tank could increase the efficiency of the condenser coil. It was also shown that there exists a generalised linear relationship that can be used to describe the system COP in terms of the temperature difference between the water in the storage tank and the ambient air.

Comparison of static and dynamic engine models on the transient performance of a passenger vehicle powertrain

This paper presents experimental and computational results obtained on the Ford Barra 190 4.0 litres I6 gasoline engine and on the Ford Falcon car equipped with this engine. Measurements of steady engine performance, fuel consumption and exhaust emissions were first collected using an automated test facility for a wide range of cam and spark timings vs. throttle position and engine speed. Simulations were performed for a significant number of measured operating points at full and part load by using a coupled Gamma Technologies GT-POWER/GT-COOL engine model for gas exchange, combustion and heat transfer. The fluid model was made up of intake and exhaust systems, oil circuit, coolant circuit and radiator cooling air circuit. The thermal model was made up of finite element components for cylinder head, cylinder, piston, valves and ports and wall thermal masses for pipes. The model was validated versus measured steady state air and fuel flow rates, cylinder pressure parameters, indicated and brake mean effective pressures, and temperature of metal, oil and coolant in selected locations. Computational results agree well with experiments, demonstrating the ability of the approach to produce fairly accurate steady state maps of BMEP and BSFC, as well as to optimize engine operation changing geometry, throttle position, cam and spark timing. Measurements of the transient performance and fuel consumption of the full vehicle were then collected over the NEDC cycle. Simulations were performed by using a coupled Gamma Technologies GT-POWER/GT-COOL/GT-DRIVE model for instantaneous engine gas exchange, combustion and heat transfer and vehicle motion. The full vehicle model is made up of transmission, driveshaft, axles, and car components and the previous engine model. The model was validated with measured fuel flow rates through the engine, engine throttle position, and engine speed and oil and coolant temperatures in selected locations. Instantaneous engine states following a time dependent demand for torque and speed differ from those obtained by interpolating steady state maps of BSFC vs. BMEP and speed. Computational results agree well with experiments, demonstrating the utility of the approach in providing a more accurate prediction of the fuel consumption over test cycles.

Processing and mechanical properties of open-cell Mg alloys

Mechanical properties of open-cellular magnesium alloys with three types of
geometric cell-structures, that is, a random round cell-structure (type A). a controlled diamond cell-structure for which the angle between the struts and the load direction is 45 degree (type B) and a controlled square cell-structure for which the angle between the struts and the loading direction is 0 degree (90 degree) (type C), are investigated by compressive tests. Results indicate that type C showed a higher collapse stress than the other two types. The collapse mechanism and the effects of the loading direction on collapse stress for the three types of magnesium alloys arc discussed from the viewpoint of bending, buckling and yielding of the struts. It is suggested that collapse for the open-cellular magnesium aHoys is associated with yielding of struts

Performance of wrought aluminium and magnesium alloy tubes in three-point bending

This present work examines the load carrying capacity, energy absorption and fracture characteristics of wrought magnesium and aluminium alloy tubes in three-point bending. Magnesium alloy AZ31, and aluminium alloys 6063 and 7075, were extruded into cylindrical tubes of both equivalent thickness and mass. A strong thickness effect was present meaning that the AZ31 tube had significantly higher load and energy absorption performance than an equivalent mass 6063 tube, albeit not as high as the 7075 tube. Hinge formation and maximum load was delayed for the magnesium alloy, meaning that a high energy absorption rate persisted to higher deformation displacements than the aluminium alloys. It was also found that fracture during deformation was dependent on the indenter diameter, tube thickness and lower support separation.

Child-focused and child-inclusive mediation : a comparative study of outcomes

Children have largely been absent from or on the periphery of mediation processes in postseparation parenting disputes. An accompanying paper canvasses a number of reasons why this may be the case. The present paper goes on to describe a current prospective study of outcomes for families utilising these two different forms.of mediation: child focused and child inclusive. The study follows the pathways of individual adjustment and parental alliance for families across the two forms of intervention, addressing whether and in what cases a child-inclusive mediation process enhances postseparation family outcomes.