Fault Tolerant Task Mapping in Many-Core Systems

The advent of many-core systems, a network on chip containing hundreds or thousands of homogeneous processors cores, present new challenges in managing the cores effectively in response to processing demands, hardware faults and the need for heat management. Continually diminishing feature size of devices increase the probability of fabrication de- fects and the variability of performance of individual transistors. In many-core systems this can result in the failure of individual processing cores, routing nodes or communication links, which require the use of fault tolerant mechanisms. Diminishing feature size also increases the power density of devices, giving rise to the concept of dark silicon where only a portion of the functionality available on a chip can be active at any one time. Core fault tolerance and management of dark silicon can both be achieved by allocating a percentage of cores to be idle at any one time. Idle cores can be used as dark silicon to evenly distribute heat generated by processing cores and can also be used as spare cores to implement fault tolerance. Both of these can be achieved by the dynamic allocation of processes to tasks in response to changes to the status of hardware resources and the demands placed on the system, which in turn requires real time task mapping. This research proposes the use of a continuous fault/recovery cycle to implement graceful degradation and amelioration to provide real-time fault tolerance. Objective measures for core fault tolerance, link fault tolerance, network power and excess traffic have been developed for use by a multi-objective evolutionary algorithm that uses knowledge of the processing demands and hardware status to identify optimal task mappings. The fault/recovery cycle is shown to be effective in maintaining a high level of performance of a many-core array when presented with a series of hardware faults

Measuring older patients’ attitudes to general practice registrars: Exploratory factor analysis of a survey instrument

Introduction: Training general practice registrars (GPRs) to meet the challenges of an ageing population is hampered by their relatively reduced contact with older patients and a paucity of suitable research to inform training models. This paper describes an exploratory factor analysis of a survey instrument assessing the attitudes of older patients to GPRs, as part of a project to address these concerns. Methods: The instrument was developed on the basis of a qualitative study and a literature review and distributed to 500 patients aged 60 years and over from 10 training practices in regional Australia. Responses to 22 of the survey’s Likert scale items were examined, including inter-item correlations and internal consistency (Cronbach’s alpha). Exploratory factor analysis was performed to identify domains of patients’ attitudes. Results: The response rate was 39.2% (n=196). None of the items were redundant and the scale had appropriate levels of internal consistency (Cronbach’s alpha = 0.76). The exploratory factor analysis identified three factors. Factor one, labelled ‘interpersonal trust’, explained 26.2% of the variance. Factor two accounted for 11.4% of the variance and was labelled ‘system trust’. Factor three, labelled ‘interpersonal continuity’, explained 7.5% of the variance. Conclusion: The instrument demonstrated acceptable psychometric properties and three distinct factors reflecting older patients’ attitudes toward GPRs, with trust appearing to be particularly important. The instrument appears effective in obtaining valid data, which should assist in developing improved training models. These findings warrant confirmation with a larger sample and exploration of adaptations of the instrument to be used in other contexts. Keywords: general practice registrar; post-graduate training; patient attitude

An Australian discharge summary quality assessment tool: A pilot study

Background and objective Patients\u27 transition from hospital care to their general practitioner (GP) can put them at risk of unforeseen adverse events, which can be minimised by the GP receiving timely access to hospital discharge summaries. The objective of this article was to develop and pilot a discharge summary assessment tool, inclusive of components that Australian GPs identified as being most important for the safe transfer of care. Method Development of the instrument was informed by a literature review pertaining to key components of effective discharge summaries. These components were included in a survey instrument, which was piloted by Australian GP participants. Results From 118 responses, the five highest ranked components of a discharge summary included lists of medications on discharge, diagnoses on discharge, reasons for any changes in medications, and details of follow-up arrangements and treatment in hospital. Discussion This paper describes the initial development and results of piloting an Australian discharge summary quality assessment tool

Older patients\u27 attitudes to general practice registrars: a qualitative study

Background Research suggests that older patients may be reluctant to engage general practice registrars (GPRs) in their care. The authors undertook a qualitative study of the attitudes of older patients to GPRs to investigate this issue. Method Thirty-eight patients aged 60 years and over from three training practices participated in semistructured telephone interviews, which explored patients responses to GPRs. The interviews were recorded, transcribed and analysed using a template analysis approach. Results Analysis of the interviews produced five major themes concerning patient attitudes to GPRs: desire for continuity, desire for access, openness, trust and a desire for meaningful communication. Discussion Older patients attitudes to GPRs cannot be viewed in isolation from their relationship with their usual general practitioner, and this needs to be taken into account when engaging GPRs in the care of older patients. Systems need to be developed to maintain relational and informational continuity with older patients\u27 regular GPs

Contraceptive Implanon: Why do GPs get asked to remove it early?

Nineteen women aged 18 to 39 years of age from four Coast City Country GP Training practices were interviewed regarding their experiences with Implanon and the reasons for early removal. All participants were in relationships and approximately half had children

XL-STaGe : A Cross-Layer Scalable Tool for Graph Generation, Evaluation and Implementation

This paper presents XL-STaGe, a cross-layer tool for traffic-inclusive directed acyclic graph generation and implementation. In contrast to other graph-generation tools which focus on high-level DAG models, XL-STaGe consists of a set of processes that generate the task-graphs as well as a detailed process model for each node in each graph. The tool is highly customizable, with many parameters that can be tuned to meet the user’s requirements to control the topology, connection density, degree of parallelism and duration the task-graph. Moreover, two use cases are presented, a high-level one, which illustrate the benefit of the developed tool in application mapping and a circuit-level one to verify the accuracy of the XL-STaGe process models when implemented in hardware

Role of Area-Level Access to Primary Care on the Geographic Variation of Cardiometabolic Risk Factor Distribution: A Multilevel Analysis of the Adult Residents in the Illawarra—Shoalhaven Region of NSW, Australia

Background: Access to primary care is important for the identification, control and management of cardiometabolic risk factors (CMRFs). This study investigated whether differences in geographic access to primary care explained area-level variation in CMRFs. Methods: Multilevel logistic regression models were used to derive the association between area-level access to primary care and seven discrete CMRFs after adjusting for individual and area-level co-variates. Two-step floating catchment area method was used to calculate the geographic access to primary care for the small areas within the study region. Results: Geographic access to primary care was inversely associated with low high density lipoprotein (OR 0.94, CI 0.91–0.96) and obesity (OR 0.91, CI 0.88–0.93), after adjusting for age, sex and area-level disadvantage. The intra-cluster correlation coefficient (ICCs) of all the fully adjusted models ranged between 0.4–1.8%, indicating low general contextual effects of the areas on CMRF distribution. The area-level variation in CMRFs explained by primary care access was ≤10.5%. Conclusion: The findings of the study support proportionate universal interventions for the prevention and control of CMRFs, rather than any area specific interventions based on their primary care access, as the contextual influence of areas on all the analysed CMRFs were found to be minimal. The findings also call for future research that includes other aspects of primary care access, such as road-network access, financial affordability and individual-level acceptance of the services in order to gain an overall picture of the area-level contributing role of primary care on CMRFs in the study region

A feasibility study of team-based primary care for chronic disease management training in rural Australia

Increasing rates of chronic disease management (CDM) are projected to contribute to significant effective shortfalls in the primary care workforce in Australia.1 Additionally, rural Australia carries a higher burden of chronic illness2 and has existing medical workforce shortages.3 Therefore, it is imperative that rural primary care maximises the efficiency of the CDM it provides

The Telehealth Skills, Training, and Implementation Project: An evaluation protocol

External stabilization is reported to improve reliability of hand held dynamometry, yet this has not been tested in burns. We aimed to assess the reliability of dynamometry using an external system of stabilization in people with moderate burn injury and explore construct validity of strength assessment using dynamometry. Participants were assessed on muscle and grip strength three times on each side. Assessment occurred three times per week for up to four weeks. Within session reliability was assessed using intraclass correlations calculated for within session data grouped prior to surgery, immediately after surgery and in the sub-acute phase of injury. Minimum detectable differences were also calculated. In the same timeframe categories, construct validity was explored using regression analysis incorporating burn severity and demographic characteristics. Thirty-eight participants with total burn surface area 5 – 40% were recruited. Reliability was determined to be clinically applicable for the assessment method (intraclass correlation coefficient \u3e0.75) at all phases after injury. Muscle strength was associated with sex and burn location during injury and wound healing. Burn size in the immediate period after surgery and age in the sub-acute phase of injury were also associated with muscle strength assessment results. Hand held dynamometry is a reliable assessment tool for evaluating within session muscle strength in the acute and sub-acute phase of injury in burns up to 40% total burn surface area. External stabilization may assist to eliminate reliability issues related to patient and assessor strength

Using health risk assessments to target and tailor: An innovative social marketing program in aged care facilities

The number of Australians over the age of 65 years is expected to double by 2021. Many older Australians suffer from one or more chronic diseases - including cancer, coronary heart disease, respiratory diseases (AIHW, 2009) resulting in increased morbidity and mortality, lower quality of life and a higher need for health care (Hickey and Stilwell, 1991). There is increasing evidence that the adoption of healthy lifestyles can have significant benefits even into older age (Haveman-Nies et al, 2002). This project utilized a social marketing framework to support aged residents of retirement homes to adopt healthy lifestyle behaviours to improve their health