Browsing by Author "Paterson, AW"

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    Detecting trends that are nonlinear and asymmetric on diurnal and seasonal time scales
    (Springer, 2014-02-22) Fischer, MJ; Paterson, AW
    Trends in climate time series are often nonlinear and temporally-asymmetric, i.e. the trend is different for different seasons and/or hours of the day. Here a method is developed that allows the nonlinearity and temporal asymmetry of a trend to be investigated simultaneously. First, nonlinear trend components are extracted from a univariate time series, by adapting a nonparametric dimension-reduction method. Then, the nonlinear trend components are substituted into a regression model in which the periodic mean component and the periodic variation in the amplitude of the nonlinear trend are modeled using harmonic functions of the seasonal and diurnal periods. Third, trend patterns in the positive and negative anomalies are investigated, by extending the nonlinear trend model using indicator variables. Fourth, a non-local inferential test is developed to test the statistical significance of the trend patterns. The nonlinear trend model is applied to a simulated time series, as well as to long-term high-resolution temperature records from five Southern Hemisphere sites: Lucas Heights, Sydney Airport, Cape Grim, Macquarie Island and Law Dome. Our method should be generally useful for identifying the effect of both climate-related factors and observation/site-related factors on seasonal and diurnal trends in meteorological data series. © 2014, Springer-Verlag Berlin Heidelberg.
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    Isotope Development in the Australian Setting
    (American Nuclear Society, 2014-08-24) Paterson, AW; Meredith, KT; Hua, Q
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    Journey from Gen III/III+ to Gen IV reactors
    (Australian Nuclear Science and Technology Organisation, 2017-11-22) Paterson, AW
    The Generation IV International Forum (GIF) was established to carry out the R&D required to meet the feasibility and performance capabilities of the next generation of nuclear energy systems. The goal is for Gen IV reactors to excel in safety, sustainability, economics and proliferation resistance. In June 2016, Australia, with ANSTO as the implementing agent, became the 14th member of GIF. ANSTO brings to GIF world class R&D capabilities, particularly in advanced nuclear materials, radiation damage assessment, safety case development and reactor modelling.
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    Six problems with the 6-day Curie and a solution
    (Springer Nature, 2015-03-17) Paterson, AW; Druce, MJ; Killen, E
    In this review the major shortfalls of the unit of sale for the Mo-99 supply chain—the 6-day Curie—are identified and discussed. These include its status as an inconsistent, out-dated, non-SI unit, and its use causing propagation of inefficient logistics within the Mo-99 supply chain. An alternative Mo-99 unit of sale is proposed: Becquerels time-stamped at the Port of Despatch. Adoption of the new unit is proposed as a catalyst in the move away from the current economically unsustainable, Mo-99 supply chain in favour of simplicity, self-regulation, transparency, efficiency, and full-cost recovery in line with High-Level Group for the Security of Supply of Medical Radioisotopes recommendations. © 2020 Springer Nature Switzerland AG