The societal costs of alcohol misuse in Australia

It is well documented that alcohol-related problems compromise individual and social health, and wellbeing. The individual harms are numerous, including premature death, loss of enjoyment and loss of social utility through fear of crime and victimisation. The misuse of alcohol, particularly among those most at risk in our community, presents a major challenge for all levels of government. In this paper, a study is presented that provides a better national-level estimate of the costs of alcohol-related problems in Australia. Despite taking a conservative estimate, the aggregate of a range of societal costs substantially outweighs the tax revenue for the Commonwealth generated from the sale of alcohol. Results of this study provide evidence to policymakers regarding costs to the criminal justice system, costs to the health system, costs resulting from lost productivity and costs related to alcohol-related road accidents. Such evidence will provide an understanding of the economic tradeoffs that are present when making decisions that affect all Australians. Proposals are provided in the conclusion for a greater investment in prevention, based on the sound evaluation of prevention and diversion strategies by comparison with treatment options, in order to ensure better investments for the nation

Coupling of Audio Signals into AFM Images

It is well known that Atomic Force Microscopy imaging is capable of yielding high resolution results with of surfaces at the nanoscale. However, despite the device capabilities and vast applications, AFM microscopy is possibly the most prone to the creation of image artifacts. AFM imaging can easily, and is often, corrupted by various external forces. The most obvious and measurable form of external interference is of course the presence of ambient noise. Most AFM manufactures attempt to counter the effects of such noise on the imaging process through use of noise-proof or noise-resistant shields that cover the microscope aperture. Without such shields however, the effects of ambient noise are distributed throughout the resultant image. Furthermore, the detection and interpretation of AFM errors is still a quite muddled procedure. The goal of this research project is to delve underneath the hood of an atomic force microscope and investigate the nature of errors caused by ambient noise on the imaging process. Through this investigation and the use of digital signal processing I hope to accurately identify the resultant artifacts left on an AFM image over a range incident signals. Having this knowledge is the first step towards several practical applications

Indigenous wellbeing in Australia: evidence from HILDA

This study explores the subjective wellbeing of Indigenous Australians. Abstract Report focusses on mean levels of self-reported life satisfaction, inequality in life satisfaction within the Indigenous and non-Indigenous Australian populations, and the prevalence and severity of dissatisfaction with one’s life. Evidence on differences in the determinants of life satisfaction between Indigenous and non-Indigenous Australians is provided. Results indicate that Indigenous life satisfaction peaked in 2003 and has since declined. We also find that inequality in life satisfaction is greater for Indigenous than non-Indigenous Australians. Despite a downward trend in the level of dissatisfaction for non-Indigenous Australians, dissatisfaction among Indigenous Australians has remained relatively unchanged

Inversion of long-lived trace gas emissions using combined Eulerian and Lagrangian chemical transport models

Supplement related to this article is available online at: http://www.atmos-chem-phys.net/11/9887/2011/acp-11-9887-2011-supplement.zip.We present a method for estimating emissions of long-lived trace gases from a sparse global network of high-frequency observatories, using both a global Eulerian chemical transport model and Lagrangian particle dispersion model. Emissions are derived in a single step after determining sensitivities of the observations to initial conditions, the high-resolution emissions field close to observation points, and larger regions further from the measurements. This method has the several advantages over inversions using one type of model alone, in that: high-resolution simulations can be carried out in limited domains close to the measurement sites, with lower resolution being used further from them; the influence of errors due to aggregation of emissions close to the measurement sites can be minimized; assumptions about boundary conditions to the Lagrangian model do not need to be made, since the entire emissions field is estimated; any combination of appropriate models can be used, with no code modification. Because the sensitivity to the entire emissions field is derived, the estimation can be carried out using traditional statistical methods without the need for multiple steps in the inversion. We demonstrate the utility of this approach by determining global SF6 emissions using measurements from the Advanced Global Atmospheric Gases Experiment (AGAGE) between 2007 and 2009. The global total and large-scale patterns of the derived emissions agree well with previous studies, whilst allowing emissions to be determined at higher resolution than has previously been possible, and improving the agreement between the modeled and observed mole fractions at some sites

Studies of SOHO Comets

We present a study of the Kreutz, Marsden, and Kracht comets observed by SOHO including photometric reductions and analysis, numerical modeling, and physical modeling. We analyze the results of our photometric study of more than 900 lightcurves of Kreutz comets observed by SOHO. We find that they do not have a bimodal distance of peak brightness as previously reported, but instead peak from 10.5-14 solar radii (prior to perihelion), suggesting there is a continuum of compositions rather than two distinct subpopulations. The lightcurves have two rates of brightening, typically ~r^-7.3 when first observed by SOHO then rapidly transitioning to ~r^-3.8 between 20-30 solar radii. It is unclear at what distance the steeper slope begins, but it likely does not extend much beyond the SOHO field of view. We derive nuclear sizes up to ~50 meters in radius for the SOHO observed comets, with a cumulative size distribution of N(>R)~R^-2.2 for comets larger than 5 meters in radius. This size distribution cannot explain the six largest members of the family seen from the ground, suggesting that either the family is not collisionally evolved or that the distribution is not uniform around the orbit. After correcting for the changing discovery circumstances, the flux of comets reaching perihelion has increased since 1996, and the increase is seen in comets of all sizes. We consider the Marsden and Kracht comets together due to their apparent dynamical linkage. Seasonal effects of the viewing geometry make it impossible to build a characteristic lightcurve of either group. Many are seen to survive perihelion and most reach a peak brightness within ~6 hours of perihelion with no preference for peaks before or after perihelion. Most are barely above the detection threshold, and the largest is probably smaller than 30 meters in radius. Our dynamical simulations suggest that the orbital distribution of the Kracht group can be produced by low velocity fragmentation events and close approaches to Jupiter over the last 50-250 years. We construct fragmentation trees for the Marsden and Kracht groups and predict that 7-8 comets in each group may be visible on their next perihelion passage