Labour Force Participation of Women Over 45

This Productivity Commission staff working paper (by Geoff Gilfillan and Les Andrews) was released in January 2011. The contribution of mature aged women (aged 45 to 64 years) to total hours worked in the economy by people of working age has increased from 6 to 15 per cent over the past three decades. Over 40 per cent of this growth has resulted from an increase in the share of mature aged women in the working age population; the rest is due mainly to a steady increase in the labour force participation rate. Work intensity has hardly changed. The share in employment accounted for by mature aged women has increased across nearly all industries, including those where they have traditionally not been employed in large numbers. Younger women today have both higher levels of education and labour force participation than mature aged women had when they were younger. It is likely, therefore, that participation rates for mature aged women will continue to rise as these younger women enter older age groups. A woman's health status and caring responsibilities also influence her likelihood of participating in the labour force in later life. A mature aged woman is more likely to be in the labour force the longer her previous period of labour force engagement. Currently, proportionately fewer mature aged women participate in the labour force than either mature aged men in Australia or mature aged women in similar OECD countries. However, the gaps in participation have narrowed considerably over the past three decades. Over the next couple of decades, the contribution of mature aged women to total hours worked will continue to rise steadily. However, the potential for additional growth in participation and average hours worked for the current cohort of mature aged women appears limited. The views expressed in this paper are those of the staff involved and do not necessarily reflect those of the Productivity Commission.matured aged women; labour force; labour force participation; employment

Effects of aircraft noise on human activities

The effects of aircrft noise on human activities was investigated by developing a battery of tasks (1) representative of a range of human activities and (2) sensitive to the disruptive effects of noise. The noise used were recordings of jet aircraft and helicopter sounds at three lvels of loudness--60, 70, and 80 dB(A). Experiment 1 investigated 12 different cognitive tasks, along with two intelligibility tasks included to validate that the noises were being effective. Interference with intelligibility was essentially the same as found in the research literature, but only inconsistent effects were found on either accuracy or latency of performance on the cognitive tasks. When the tasks were grouped into four categories (Intelligibility, Matching, Verbal, and Arithmetic), reliable differences in rated annoyingness of the noises were related to the task category and to the type of noise (jet or helicopter)

IL-15 sustains IL-7R-independent ILC2 and ILC3 development

The signals that maintain tissue-resident innate lymphoid cells (ILC) in different microenvironments are incompletely understood. Here we show that IL-7 receptor (IL-7R) is not strictly required for the development of any ILC subset, as residual cells persist in the small intestinal lamina propria (siLP) of adult and neonatal Il7ra(−/−) mice. Il7ra(−/−) ILC2 primarily express an ST2(−) phenotype, but are not inflammatory ILC2. CCR6(+) ILC3, which express higher Bcl-2 than other ILC3, are the most abundant subset in Il7ra(−/−) siLP. All ILC subsets are functionally competent in vitro, and are sufficient to provide enhanced protection to infection with C. rodentium. IL-15 equally sustains wild-type and Il7ra(−/−) ILC survival in vitro and compensates for IL-7R deficiency, as residual ILCs are depleted in mice lacking both molecules. Collectively, these data demonstrate that siLP ILCs are not completely IL-7R dependent, but can persist partially through IL-15 signalling

Heroin detoxification during pregnancy: A systematic review and retrospective study of the management of heroin addiction in pregnancy

Background. There is general consensus that methadone maintenance is the gold standard in the management of pregnant heroin users. However, in South African state hospitals, methadone withdrawal is the routine procedure offered to these patients, as methadone maintenance programmes are unavailable in the public sector.Objectives. To conduct a systematic review of the literature on heroin detoxification in pregnancy, and to document pregnancy outcomes in heroin users detoxified with methadone at Groote Schuur Hospital (GSH), Cape Town, from 2006 to 2010.Methods. A literature search was undertaken to identify key publications on the management of heroin addiction in pregnancy. Patients for the study were identified from the GSH methadone registry, and data were collected from the clinical files.Results. A total of 20 relevant publications were identified and reviewed. Early case reports described an increased risk of stillbirths and fetal distress after methadone detoxification, but more recent case series involving larger numbers of patients showed positive outcomes. In our study, six pregnant patients received methadone withdrawal over a 5-year period at GSH, and all the neonates had good Apgar scores and were discharged home within 3 days of delivery.Conclusions. There is limited evidence on the management of heroin addiction during pregnancy, and the only two guidelines identified suggest that methadone maintenance is preferable to methadone withdrawal. The favourable pregnancy outcomes in this small sample of patients managed with methadone withdrawal suggest that it may be safe and deserves further study

A quantitative analysis of the changing relationship between ethnic diversity and social quality in England

Robert Putnam’s 2007 empirical study, E Pluribus Unum, has become the seminal study in a growing body of work which uses statistical methods to measure the effects of ethnic diversity on social capital, or other measures of social quality. Putnam’s study found that ethnic diversity negatively affects social capital in the United States, leading people to withdraw from social contact and ‘hunker down’ at home, alone, miserably watching TV. This study revisits Putnam’s findings and seeks to plug two major gaps across this field: firstly, the absence of any frame of reference for social capital or other measures of social quality, which has led to both a narrowing of the commonly used indicators of social quality and a possible over-stating of the relative importance to overall social quality of those indicators which are employed; and, secondly, the lack of any investigation into how relationships between ethnic diversity and social quality change over time. This study addresses two research questions: Do ethnic diversity and immigration have any effects on a range of indicators of social quality in local areas of England? Do any effects from ethnic diversity and immigration on social quality change over time? The study analyses data from the Citizenship Survey and other sources to investigate whether the rapid increase and spread of ethnic diversity throughout England in the twenty year period from 1991 to 2011 had any measurable effects on indicators of social quality in local authority areas over the period 2001 to 2011. The study finds that ethnic diversity and immigration do have the negative effect on local trust identified by Putnam but that they also have positive effects on some social quality measures, and no effects on others. Broadly, these effects become more positive over time for measures of social cohesion and more negative for measures of social capital. The study demonstrates that the negative, positive and null effects of ethnic diversity are linked to differences in the measure of social quality; when individual-level, attitudinal, proximate measures of social quality are used, like local trust, negative findings are far more likely. The study concludes that ethnic diversity and immigration are not useful explanations for variance in social quality; levels of deprivation and higher-education more strongly account for this. It would be worthwhile to further develop a robust framework for quantitative studies of social quality and to improve methodologies for measuring social quality relationships over time

TREM2 sustains microglial expansion during aging and response to demyelination

Microglia contribute to development, homeostasis, and immunity of the CNS. Like other tissue-resident macrophage populations, microglia express the surface receptor triggering receptor expressed on myeloid cells 2 (TREM2), which binds polyanions, such as dextran sulphate and bacterial LPS, and activates downstream signaling cascades through the adapter DAP12. Individuals homozygous for inactivating mutations in TREM2 exhibit demyelination of subcortical white matter and a lethal early onset dementia known as Nasu-Hakola disease. How TREM2 deficiency mediates demyelination and disease is unknown. Here, we addressed the basis for this genetic association using Trem2(-/-) mice. In WT mice, microglia expanded in the corpus callosum with age, whereas aged Trem2(-/-) mice had fewer microglia with an abnormal morphology. In the cuprizone model of oligodendrocyte degeneration and demyelination, Trem2(-/-) microglia failed to amplify transcripts indicative of activation, phagocytosis, and lipid catabolism in response to myelin damage. As a result, Trem2(-/-) mice exhibited impaired myelin debris clearance, axonal dystrophy, oligodendrocyte reduction, and persistent demyelination after prolonged cuprizone treatment. Moreover, myelin-associated lipids robustly triggered TREM2 signaling in vitro, suggesting that TREM2 may directly sense lipid components exposed during myelin damage. We conclude that TREM2 is required for promoting microglial expansion during aging and microglial response to insults of the white matter

Distinct and complementary functions of MDA5 and TLR3 in poly(I:C)-mediated activation of mouse NK cells

The double-stranded RNA (dsRNA) analogue poly(I:C) is a promising adjuvant for cancer vaccines because it activates both dendritic cells (DCs) and natural killer (NK) cells, concurrently promoting adaptive and innate anticancer responses. Poly(I:C) acts through two dsRNA sensors, Toll-like receptor 3 (TLR3) and melanoma differentiation-associated protein-5 (MDA5). Here, we investigated the relative contributions of MDA5 and TLR3 to poly(I:C)-mediated NK cell activation using MDA5−/−, TLR3−/−, and MDA5−/−TLR3−/− mice. MDA5 was crucial for NK cell activation, whereas TLR3 had a minor impact most evident in the absence of MDA5. MDA5 and TLR3 activated NK cells indirectly through accessory cells and induced the distinct stimulatory cytokines interferon-α and interleukin-12, respectively. To identify the relevant accessory cells in vivo, we generated bone marrow chimeras between either wild-type (WT) and MDA5−/− or WT and TLR3−/− mice. Interestingly, multiple accessory cells were implicated, with MDA5 acting primarily in stromal cells and TLR3 predominantly in hematopoietic cells. Furthermore, poly(I:C)-mediated NK cell activation was not notably impaired in mice lacking CD8α DCs, providing further evidence that poly(I:C) acts through diverse accessory cells rather than solely through DCs. These results demonstrate distinct yet complementary roles for MDA5 and TLR3 in poly(I:C)-mediated NK cell activation

Heroin detoxification during pregnancy: A systematic review and retrospective study of the management of heroin addiction in pregnancy

Background. There is general consensus that methadone maintenance is the gold standard in the management of pregnant heroin users. However, in South African state hospitals, methadone withdrawal is the routine procedure offered to these patients, as methadone maintenance programmes are unavailable in the public sector.Objectives. To conduct a systematic review of the literature on heroin detoxification in pregnancy, and to document pregnancy outcomes in heroin users detoxified with methadone at Groote Schuur Hospital (GSH), Cape Town, from 2006 to 2010.Methods. A literature search was undertaken to identify key publications on the management of heroin addiction in pregnancy. Patients for the study were identified from the GSH methadone registry, and data were collected from the clinical files.Results. A total of 20 relevant publications were identified and reviewed. Early case reports described an increased risk of stillbirths and fetal distress after methadone detoxification, but more recent case series involving larger numbers of patients showed positive outcomes. In our study, six pregnant patients received methadone withdrawal over a 5-year period at GSH, and all the neonates had good Apgar scores and were discharged home within 3 days of delivery.Conclusions. There is limited evidence on the management of heroin addiction during pregnancy, and the only two guidelines identified suggest that methadone maintenance is preferable to methadone withdrawal. The favourable pregnancy outcomes in this small sample of patients managed with methadone withdrawal suggest that it may be safe and deserves further study.

Stepping into the Same River Twice: Field Evidence for the Repeatability of a CO2 Injection Test

A single well characterisation test was conducted at the CO2CRC Otway storage site in Victoria, Australia, in 2011 and repeated in 2014. The near-well permeability was found to have declined nearly 60% since the 2011 test, while the residual saturation inferred from a variety of techniques was lower in 2014. There was a significant change in water chemistry, suggesting an alteration of near-well reservoir properties. Possible reasons for these changes are explored, and the implications for other field tests are discussed