1,451 research outputs found

    The MacGuffin block cipher algorithm

    Full text link

    High Resolution Sensing Techniques for Slope Stability Studies

    Get PDF
    FHWA-7-3-0001The National Bureau of Standards (NBS), in conjunction with the U.S. Geological Survey (USGS), conducted a four-phase evaluation of high resolution remote sensing techniques for application to problems of determining slope stability. The first two phases, for which the USGS was chiefly responsible, concentrated on documenting the subsurface features and associated characteristics which determine or influence slope stability. In phase three, the NBS surveyed a variety of electromagnetic and acoustic remote sensing techniques which exhibited the greatest potential for detecting the subsurface features and characteristics and which satisfied the Federal Highway Administration (FHWA) conditions of availability, practicality and portability. Two techniques were chosen for further experimental and developmental pursuit: the existing FM-CW radar system, and the planar near-field reconstruction (PNFR) approach, respectively. In phase four, the existing FM-CW radar system was applied and analyzed in a series of field experiments to determine the subsurface structure at a designated test site in the Pike National Forest south of Denver, Colorado. Local and regional subsurface conditions for the test site were mapped and a detailed geologic section of the site was produced from core samples taken from four boreholes drilled into the subsurface granite. The FM-CW system, which has displayed considerable success in the past for the subsurface granite. The FM-CW system, which has displayed considerable success in the past for locating near-surface anomalies, accurately revealed a joint at a depth of 6.5 meters which was confirmed by the core data. The PNFR technique, which is still in the development stage at NBS and is based on an effective utilization of the exact holographic or near-field equations, was also pursued to the point of running computer simulated experiments. Preliminary results for the detection of small subsurface anomalies by the PNFR technique have been highly encouraging

    Environmental impacts of food retail: A framework method and case application

    Get PDF
    © 2015 Elsevier Ltd. The food retail sector is the gatekeeper between consumers and producers and has substantial influence on consumption and production choices via procurement and provision decisions. Food provision and consumption systems embody huge environmental impacts worldwide. Food retailers as gatekeepers have a key role to play to enable sustainable consumption and provision to become common practice. In this paper, a framework to attribute emissions and water use to individual and all food retail businesses and their products by geographical area and postcode of cities is presented. As far as the current authors are aware, such a framework has not been generated for food retail sector businesses before, primarily due to barriers to input-output modelling of the sector. The scientific value added is that a novel approach to overcome barriers is presented as well as the required framework. The framework is illustrated for Southampton, but can be applied in other regions of the world where similar data exist. The value of a business's product emissions estimates (generated by the framework) is they can be a first step in informing product prioritisation for focussing information searches or more detailed life cycle analysis to make sustainable procurement and choice editing decisions. The approach has value to government, businesses and non-government organisations (NGOs) in developing strategy and planning sustainable provision and procurement; by helping benchmark sustainable shopping provision, prioritisation of retail businesses and product categories for sustainable procurement/choice editing

    Stores healthy options project in remote indigenous communities (SHOP@RIC): a protocol of a randomised trial promoting healthy food and beverage purchases through price discounts and in-store nutrition education

    Get PDF
    BackgroundIndigenous Australians suffer a disproportionate burden of preventable chronic disease compared to their non-Indigenous counterparts – much of it diet-related. Increasing fruit and vegetable intakes and reducing sugar-sweetened soft-drink consumption can reduce the risk of preventable chronic disease. There is evidence from some general population studies that subsidising healthier foods can modify dietary behaviour. There is little such evidence relating specifically to socio-economically disadvantaged populations, even though dietary behaviour in such populations is arguably more likely to be susceptible to such interventions.This study aims to assess the impact and cost-effectiveness of a price discount intervention with or without an in-store nutrition education intervention on purchases of fruit, vegetables, water and diet soft-drinks among remote Indigenous communities.Methods/DesignWe will utilise a randomised multiple baseline (stepped wedge) design involving 20 communities in remote Indigenous Australia. The study will be conducted in partnership with two store associations and twenty Indigenous store boards. Communities will be randomised to either i) a 20% price discount on fruit, vegetables, water and diet soft-drinks; or ii) a combined price discount and in-store nutrition education strategy. These interventions will be initiated, at one of five possible time-points, spaced two-months apart. Weekly point-of-sale data will be collected from each community store before, during, and for six months after the six-month intervention period to measure impact on purchasing of discounted food and drinks. Data on physical, social and economic factors influencing weekly store sales will be collected in order to identify important covariates. Intervention fidelity and mediators of behaviour change will also be assessed.DiscussionThis study will provide original evidence on the effectiveness and cost-effectiveness of price discounts with or without an in-store nutrition education intervention on food and drink purchasing among a socio-economically disadvantaged population in a real-life setting

    Independence and effectiveness: Messages from the role of Independent Reviewing Officers in England

    Get PDF
    This paper draws on research into the role of Independent Reviewing Officers (IROs) in England, exploring the dimensions and challenges of their ‘independence’. IROs are specialist social workers whose function is to review the cases of children in public care and ensure that they have appropriate plans and that these plans are being implemented in a timely manner. IROs are ‘independent’ in the sense that they are not the social worker to whom a child’s case is allocated, and do not have line management responsibility for the case, however they are employed by the same local authority. There are detailed regulations and government guidelines on their role, and high expectations, but what does independence mean in this context? The paper draws on a mixed methods study conducted by the authors in 2012-14, which included a survey of 122 files of children in care from four local authorities; interviews with 54 social workers, 54 IROs, 15 parents, and 15 young people; six focus groups; and nationally-distributed questionnaires for IROs (65), social work managers (46) and children’s guardians (39). The study found five dimensions of independence: professional, operational, perceived, institutional and effective. The IROs and social workers generally took more nuanced and pragmatic approaches to their inter-professional working than prescribed in the policy guidance or the pronouncements of politicians and judges, seeing this as more likely to be effective. IROs are not, and cannot be, the solution to all the problems that exist in services for children in care, and the other professionals involved should not be seen as necessarily any less capable or committed to the best interests of the children. Rather, the IRO is part of an interactive system of checks and balances which, together, may increase the likelihood that professional judgement will be exercised effectively on the child’s behalf

    Disparities exist between National food group recommendations and the dietary intakes of women

    Get PDF
    <p>Abstract</p> <p>Background</p> <p>Preconception and pregnancy dietary intakes can influence the health of future generations. In this study we compared the food intakes of reproductive-aged women by pregnancy status, to current Australian recommendations.</p> <p>Methods</p> <p>Data are from the Australian Longitudinal Study on Women's Health, younger cohort aged 25-30 years in 2003, with self-reported status as pregnant (n = 606), trying to conceive (n = 454), given birth in the last 12 months (n = 829) or other (n = 5597). Diet was assessed using a validated 74-item food frequency questionnaire. Food group servings and nutrient intakes were compared to the Australian Guide to Healthy Eating (AGHE) and Australian Nutrient Reference Values (NRVs).</p> <p>Results</p> <p>No women met all AGHE food group recommendations. Highest adherence rates [mean (95% CI) servings/day] were for meat [85%, 1.9(1.8-1.9)], fruit [44%, 2.1(2.1-2.2)] and dairy [35%, 1.8(1.8-1.9)], with < 14% meeting remaining recommendations. Women who achieved NRVs (folate, iron, calcium, zinc, fibre) for pregnancy, breastfeeding and adult life stages were 1.5%, 3.3% and 13.7%, respectively. Compared to AGHE, women consumed more servings of fruit (4.9 vs 4.0;<it>P </it>= 0.034) and dairy (3.4 vs 2.0;<it>P </it>= 0.006) to achieve pregnancy NRVs; more dairy (2.9 vs 2.0;<it>P </it>= 0.001), less fruit (3.9 vs 5.0;<it>P </it>< .001) and vegetables (3.4 vs 7.0;<it>P </it>< .001) to achieve breastfeeding NRVs; more fruit (3.6 vs 3.0;<it>P </it>< .001), dairy (2.5 vs 2.0;<it>P </it>< .001), meat (1.8 vs 1.5;<it>P </it>= 0.015), less vegetables (3.6 vs 5.0;<it>P </it>< .001) to achieve adult NRVs.</p> <p>Conclusions</p> <p>The AGHE does not align with contemporary diets of Australian women or enable them to meet all NRVs. Current tools to guide food consumption by women during pregnancy require revision.</p

    Delivery of maternal health care in Indigenous primary care services: baseline data for an ongoing quality improvement initiative

    Get PDF
    Extent: 10p.BACKGROUND: Australia's Aboriginal and Torres Strait Islander (Indigenous) populations have disproportionately high rates of adverse perinatal outcomes relative to other Australians. Poorer access to good quality maternal health care is a key driver of this disparity. The aim of this study was to describe patterns of delivery of maternity care and service gaps in primary care services in Australian Indigenous communities. METHODS: We undertook a cross-sectional baseline audit for a quality improvement intervention. Medical records of 535 women from 34 Indigenous community health centres in five regions (Top End of Northern Territory 13, Central Australia 2, Far West New South Wales 6, Western Australia 9, and North Queensland 4) were audited. The main outcome measures included: adherence to recommended protocols and procedures in the antenatal and postnatal periods including: clinical, laboratory and ultrasound investigations; screening for gestational diabetes and Group B Streptococcus; brief intervention/advice on health-related behaviours and risks; and follow up of identified health problems. RESULTS: The proportion of women presenting for their first antenatal visit in the first trimester ranged from 34% to 49% between regions; consequently, documentation of care early in pregnancy was poor. Overall, documentation of routine antenatal investigations and brief interventions/advice regarding health behaviours varied, and generally indicated that these services were underutilised. For example, 46% of known smokers received smoking cessation advice/counselling; 52% of all women received antenatal education and 51% had investigation for gestational diabetes. Overall, there was relatively good documentation of follow up of identified problems related to hypertension or diabetes, with over 70% of identified women being referred to a GP/Obstetrician. CONCLUSION: Participating services had both strengths and weaknesses in the delivery of maternal health care. Increasing access to evidence-based screening and health information (most notably around smoking cessation) were consistently identified as opportunities for improvement across services.Alice R. Rumbold, Ross S. Bailie, Damin Si, Michelle C. Dowden, Catherine M. Kennedy, Rhonda J. Cox, Lynette O’Donoghue, Helen E. Liddle, Ru K. Kwedza, Sandra C. Thompson, Hugh P. Burke, Alex D. H. Brown, Tarun Weeramanthri and Christine M. Connor
    • …
    corecore