Research on network anycast

Anycast is defined as a service in IPv6, which provides stateless best effort delivery of an anycast datagram to at least one, and preferably only one host. It is a topic of increasing interest. This paper is an attempt to gather and report on the work done on anycast. There are two main categories at present: network-layer anycast and application-layer anycast. Both involve anycast architectures, routing algorithms, metrics, applications, etc. We also present an efficient algorithm for application-layer anycast, and point out possible research directions based on our research.

On the governance of public education

Private schools in Australia receive significant public funding, but their determination to concentrate social and cultural capital and consolidate positional advantage ‘denies the possibility of their serving the public interest’. A 1998 study of Victorian private schools has confirmed that they produce above-average academic results and are also concentrated in high socioeconomic geographic areas. The few private schools outside this pattern serve mainly provincial areas or ethnic minority groups. High academic credentials depend at least in part on their scarcity, and ‘the selective function of schools, directed towards establishing a hierarchy of performance, overwhelms the pedagogical function of universal learning and social justice,’ especially at transition points in the education system. The governance procedures of schools typically encourage high academic standards ‘through mechanisms of exclusion’. Private schools in particular, at the secondary level, tend to ‘export failure’ through ‘predatory recruitment and selective dumping practices’, and by arrangements with universities for early placement of high performers into preferred tertiary courses. The broader education system reinforces the competitive processes within schools though competitive examinations. A range of steps can address these equity problems. Curriculum should be made more sensitive to disadvantaged social groups. Secondary schools should be aligned more closely to the social, cultural and economic development of their communities through mechanisms such as VET in schools, linkages with TAFE colleges, and a broadened curriculum that addresses community problems.

An authentication framework for e-health systems

The high-level sensitivity of medical information mandates stronger authentication and authorization mechanisms to be used in e-Health systems. This paper describes the design and implementation of certificate-based e-Health authentication and authorization architecture. This architecture was developed to authenticate e-Health professionals accessing shared clinical data among a set of affiliated health institutions based on peer-to- peer networks. The architecture had to accommodate specific medical data sharing and handling requirements, namely the security of professionals' credentials.

`Silly, soft and otherwise suspect`: doctoral education as risky business

This article investigates how certain doctoral practices come to count as scandalous and with what effects on universities. To do so, it engages with a number of recent media allegations that relate to doctoral practice in Australia and elsewhere. The analysis of these allegations is developed in terms of three broad categories, namely allegations of silliness in relation to thesis content, allegations of softness in relation to entry, rigour and assessment, and allegations of suspect conduct and/or credentials. The impact of such allegations on university governance is then addressed.

A framework for sustainable ecotourism : application to Costa Rica

Costa Rica is a small Central American nation that has gained an international reputation as a leader in environmental conservation. This has formed the base for its highly successful and lucrative small-scale ecotourism industry. However, there are threats from high rates of deforestation and expanding large-scale tourism that is trading on strong environmental credentials, so it is appropriate to conduct this policy analysis on such a significant ecotourism area. The paper develops an ecologically sustainable economic framework, drawing on the works of Adolph Lowe (1893-1995) and Michalstrok Kalecki (1899-1970), to examine the Costa Rican experience and then analyse lessons for general policy development of any ecotourism area. The analysis is conducted from a political economy (and not a tourism management) perspective on the trade-offs between small-scale and large-scale ecotourism.

Ecotourism in Costa Rica: an economic framework of analysis

Costa Rica is a small Central American nation that has gained an international reputation as a leader in environmental conservation. This has formed the base for its highly successful and lucrative small-scale ecotourism industry. However, there are threats from high rates of deforestation and expanding large scale tourism that is trading on strong environmental credentials. This paper sets out an ecologically sustainable economic framework to firstly examine the Costa Rican experience, and then analyse lessons for general policy development of any ecotourism industry. The analysis is conducted from a political economy perspective on the trade-offs between small-scale and large-scale tourism.

Ripple effect : an improved geographic routing with local connectivity information

One of the key challenges in geographic routing is how to deal with dead-ends, where greedy routing fails to find a neighbor node which is closer to the destination. Most existing geographic routing algorithms just switch to the deterministic face routing or limits its face searching range. In this paper, we demonstrate that we can improve routing performance by considering local connectivity status at each node before making routing decision. We present a protocol, Density Ripple Exchange (DRE), that maintains local density information at each node, and a new geographic routing algorithm, Geographic Ripple Routing (GRR), that achieves better routing performance in both hop stretch and transmission stretch than existing geographic routing algorithms by exploiting available connectivity information. Our simulations demonstrate that we increased the performance for GRR over Greedy Perimeter Stateless Routing (GPSR) by about 15%. The cost of this improved performance is a small amount of additional local connectivity information required for our algorithm.

An online credential management service for InterGrid computing

Grid users and their jobs need credentials to access grid resources and services. It is important to minimize the exposure of credentials to adversaries. A practical solution is needed that works with existing software and is easy to deploy, administer, and maintain. Thus, credential management services are the wave of the future for virtual organizations such as Grid computing. This paper describes architecture of a scalable, secure and reliable on-line credential management service called SafeBox for InterGrid computing platform. SafeBox provides InterGrid users with secure mechanism for storing one or multiple credentials and access them based on need at anytime from anywhere.

The Wikipedia : experts, expertise and ethical challenges

Participatory models are replacing the traditional models of experts and expertise that are based on individuals, their credentials and domain experience. The Wikipedia is a well-known and popular online encyclopedia, built, edited and administrated by lay citizens rather than traditional experts. It
utilises a Web-based participatory model of experts and expertise to enable knowledge contributions and provide administration. While much has been written about the Wikipedia and its merits and pitfalls, there are important ethical challenges stemming from the underlying Wikipedia model. Ethical concerns are likely to be important to Wikipedia users, however as yet, such
concerns have not been systematically explored. By reviewing and synthesising existing literature, this paper identifies six key ethical challenges for existing and potential Wikipedia users, stemming
from the underlying Web-based participatory model of experts and expertise. Important implications arising from the findings are also discussed.

Assessing cost-effectiveness in obesity (ACE-Obesity) : an overview of the ACE approach, economic methods and cost results

Background : The aim of the ACE-Obesity study was to determine the economic credentials of interventions which aim to prevent unhealthy weight gain in children and adolescents. We have reported elsewhere on the modelled effectiveness of 13 obesity prevention interventions in children. In this paper, we report on the cost results and associated methods together with the innovative approach to priority setting that underpins the ACE-Obesity study.

Methods : The Assessing Cost-Effectiveness (ACE) approach combines technical rigour with 'due process' to facilitate evidence-based policy analysis. Technical rigour was achieved through use of standardised evaluation methods, a research team that assembles best available evidence and extensive uncertainty analysis. Cost estimates were based on pathway analysis, with resource usage estimated for the interventions and their 'current practice' comparator, as well as associated cost offsets. Due process was achieved through involvement of stakeholders, consensus decisions informed by briefing papers and 2nd stage filter analysis that captures broader factors that influence policy judgements in addition to cost-effectiveness results. The 2nd stage filters agreed by stakeholders were 'equity', 'strength of the evidence', 'feasibility of implementation', 'acceptability to stakeholders', 'sustainability' and 'potential for side-effects'.

Results : The intervention costs varied considerably, both in absolute terms (from cost saving [6 interventions] to in excess of AUD50m per annum) and when expressed as a 'cost per child' estimate (from <AUD1.0 [reduction of TV advertising of high fat foods/high sugar drinks] to >AUD31,000 [laparoscopic adjustable gastric banding for morbidly obese adolescents]). High costs per child reflected cost structure, target population and/or under-utilisation.

Conclusions : The use of consistent methods enables valid comparison of potential intervention costs and cost-offsets for each of the interventions. ACE-Obesity informs policy-makers about cost-effectiveness, health impact, affordability and 2nd stage filters for important options for preventing unhealthy weight gain in children. In related articles cost-effectiveness results and second stage filter considerations for each intervention assessed will be presented and analysed.

The cost-effectiveness of Australia's active after-school communities program

The objective of this study was to assess from a societal perspective the cost-effectiveness of the Active After-school Communities (AASC) program, a key plank of the former Australian Government's obesity prevention program. The intervention was modeled for a 1-year time horizon for Australian primary school children as part of the Assessing Cost-Effectiveness in Obesity (ACE-Obesity) project. Disability-adjusted life year (DALY) benefits (based on calculated effects on BMI post-intervention) and cost-offsets (consequent savings from reductions in obesity-related diseases) were tracked until the cohort reached the age of 100 years or death. The reference year was 2001, and a 3% discount rate was applied. Simulation-modeling techniques were used to present a 95% uncertainty interval around the cost-effectiveness ratio. An assessment of second-stage filter criteria ("equity," "strength of evidence," "acceptability to stakeholders," "feasibility of implementation," "sustainability," and "side-effects") was undertaken by a stakeholder Working Group to incorporate additional factors that impact on resource allocation decisions. The estimated number of children new to physical activity after-school and therefore receiving the intervention benefit was 69,300. For 1 year, the intervention cost is Australian dollars (AUD) 40.3 million (95% uncertainty interval AUD 28.6 million; AUD 56.2 million), and resulted in an incremental saving of 450 (250; 770) DALYs. The resultant cost-offsets were AUD 3.7 million, producing a net cost per DALY saved of AUD 82,000 (95% uncertainty interval AUD 40,000; AUD 165,000). Although the program has intuitive appeal, it was not cost-effective under base-case modeling assumptions. To improve its cost-effectiveness credentials as an obesity prevention measure, a reduction in costs needs to be coupled with increases in the number of participating children and the amount of physical activity undertaken.

The cost-effectiveness of removing television advertising of high-fat and/or high-sugar food and beverages to Australian children

Objective: To model the health benefits and cost-effectiveness of banning television (TV) advertisements in Australia for energy-dense, nutrient-poor food and beverages during children's peak viewing times.

Methods: Benefits were modelled as changes in body mass index (BMI) and disability-adjusted life years (DALYs) saved. Intervention costs (AUD$) were compared with future health-care cost offsets from reduced prevalence of obesity-related health conditions. Changes in BMI were assumed to be maintained through to adulthood. The comparator was current practice, the reference year was 2001, and the discount rate for costs and benefits was 3%. The impact of the withdrawal of non-core food and beverage advertisements on children's actual food consumption was drawn from the best available evidence (a randomized controlled trial of advertisement exposure and food consumption). Supporting evidence was found in ecological relationships between TV advertising and childhood obesity, and from the effects of marketing bans on other products. A Working Group of stakeholders provided input into decisions surrounding the modelling assumptions and second-stage filters of 'strength of evidence', 'equity', 'acceptability to stakeholders', 'feasibility of implementation', 'sustainability' and 'side-effects'.

Results: The intervention had a gross incremental cost-effectiveness ratio of AUD$ 3.70 (95% uncertainty interval (UI) $2.40, $7.70) per DALY. Total DALYs saved were 37 000 (95% UI 16 000, 59 000). When the present value of potential savings in future health-care costs was considered (AUD$ 300m (95% UI $130m, $480m), the intervention was 'dominant', because it resulted in both a health gain and a cost offset compared with current practice.

Conclusions: Although recognizing the limitations of the available evidence, restricting TV food advertising to children would be one of the most cost-effective population-based interventions available to governments today. Despite its economic credentials from a public health perspective, the initiative is strongly opposed by food and advertising industries and is under review by the current Australian government.

The equipping inclusion studies : assistive technology use and outcomes in Victoria ; key findings and policy implications, study 1 - the equipment study, study 2 - the economic study

Approximately one in five of the Australian population lives with disability (AIHW 2006a; ABS 2003). Of these, almost 1.9 million rely on assistive technologies to live independently (Hobbs, Close, Downing, Reynolds & Walker 2009).

Assistive Technology (AT) is defined as,

‘any device, system or design, whether acquired commercially or off the shelf, modified or customised, that allows an individual to perform a task that they would otherwise be unable to do, or increase the ease and safety with which a task can be performed’ (Independent Living Centres Australia n.d).

‘Assistive Technology solutions’ have been defined as entailing a combination of devices (aids and equipment), environmental modifications (both in the home and outside of it), and personal care (paid and unpaid) (Assistive Technology Collaboration n.d).

Despite a large number of Australians relying on AT, there is little data available about life for these Australians, the extent of AT use, or unmet need for AT. Existing research in Australia suggests that aids and equipment provision in Australia is ‘fragmented’ across a plethora of government and non government programs (AIHW 2006a:35). In Victoria, one of the prime sources of government funding for AT is the Victorian Aids and Equipment Program (VAEP) which is a subsidy program for the purchase of aids and equipment, home and vehicle modifications for people with permanent or long term disability. Recent research suggests that waiting times for accessing equipment through the VAEP are high, as is the cost burden to applicants (Wilson, Wong & Goodridge 2006). In addition, there appears to be a substantial level of unmet need (KPMG 2007).

Additionally, there is a paucity of literature around the economic evaluation of AT interventions and solution packages, resulting in little evidence of their cost-effectiveness credentials.

The equipping inclusion studies : assistive technology use and outcomes in Victoria ; key findings and policy recommendations

Approximately one in five of the Australian population lives with disability (AIHW 2006a; ABS 2003). Of these, almost 1.9 million rely on assistive technologies to live independently (Hobbs, Close, Downing, Reynolds & Walker 2009).

Assistive Technology (AT) is defined as,

‘any device, system or design, whether acquired commercially or off the shelf, modified or customised, that allows an individual to perform a task that they would otherwise be unable to do, or increase the ease and safety with which a task can be performed’ (Independent Living Centres Australia n.d).

‘Assistive Technology solutions’ have been defined as entailing a combination of devices (aids and equipment), environmental modifications (both in the home and outside of it), and personal care (paid and unpaid) (Assistive Technology Collaboration n.d).

Despite a large number of Australians relying on AT, there is little data available about life for these Australians, the extent of AT use, or unmet need for AT. Existing research in Australia suggests that aids and equipment provision in Australia is ‘fragmented’ across a plethora of government and non government programs (AIHW 2006a:35). In Victoria, one of the prime sources of government funding for AT is the Victorian Aids and Equipment Program (VAEP) which is a subsidy program for the purchase of aids and equipment, home and vehicle modifications for people with permanent or long term disability. Recent research suggests that waiting times for accessing equipment through the VAEP are high, as is the cost burden to applicants (Wilson, Wong & Goodridge 2006). In addition, there appears to be a substantial level of unmet need (KPMG 2007).

Additionally, there is a paucity of literature around the economic evaluation of AT interventions and solution packages, resulting in little evidence of their cost-effectiveness credentials.

Autobiography in Australian parliamentary first speeches

This article analyzes the autobiographical content in the First Speeches of three Australian parliaments (1950, 1976, and 1996). It argues that such autobiographical disclosure has significant political functions—in particular, representing credentials, and representing social and political affiliations. The essay argues that these functions highlight, and finesse, the paradoxical condition that parliamentarians find themselves in, of having to simultaneously represent themselves and their constituencies.