2,271 research outputs found

    The Cluster Wind from Local Massive Star Clusters

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    Results of a study of the theoretically predicted and observed X-ray properties of local massive star clusters are presented, with a focus on understanding the mass and energy flow from these clusters into the ISM via a cluster wind. A simple theoretical model, based on the work of Chevalier & Clegg (1985), is used to predict the theoretical cluster properties, and these are compared to those obtained from recent Chandra observations. The model includes the effect of lower energy transfer efficiency and mass-loading. In spite of limited statistics, some general trends are indicated; the observed temperature of the diffuse X-ray emission is lower than that predicted from the stellar mass and energy input rates, but the predicted scaling of X-ray luminosity with cluster parameters is seen. The implications of these results are discussed.Comment: 9 pages, 6 figues, accepted for publication in MNRA

    Chandra and XMM-Newton Observations of NGC 4214: The Hot Interstellar Medium and the Luminosity Function of Dwarf Starbursts

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    We present results from Chandra and XMM-Newton X-ray observations of NGC 4214, a nearby dwarf starburst galaxy containing several young regions of very active star-formation. Starburst regions are known to be associated with diffuse X-ray emission, and in this case the X-ray emission from the galaxy shows an interesting morphological structure within the galaxy, clearly associated with the central regions of active star-formation. Of the two main regions of star-formation in this galaxy, X-ray emission associated with the older is identified whereas little is detected from the younger, providing an insight into the evolutionary process of the formation of superbubbles around young stellar clusters. The spectra of the diffuse emission from the galaxy can be fitted with a two temperature component thermal model with kT=0.14keV and 0.52keV, and analysis of this emission suggests that NGC 4214 will suffer a blow-out in the future. The point source population of the galaxy has an X-ray luminosity function with a slope of -0.76. This result, together with those for other dwarf starburst galaxies (NGC 4449 and NGC 5253), was added to a sample of luminosity functions for spiral and starburst galaxies. The slope of the luminosity function of dwarf starbursts is seen to be similar to that of their larger counterparts and clearly flatter than those seen in spirals. Further comparisons between the luminosity functions of starbursts and spiral galaxies are also made.Comment: 16 pages, 12 figures. Accepted for publication in MNRA

    Dyslexia or Literacy Difficulties: What Difference Does a Label Make? Exploring the Perceptions and Experiences of Young People

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    This study explores the views of young people (YP), with and without self-reported dyslexia or literacy difficulties, focussing on the impact of labels. Qualitative data were gathered through an online survey and individual interviews. The study highlights how the presence or absence of a label can impact people’s perceptions. Dyslexia was perceived as biological in origin; therefore, YP with the label were seen as not to blame for their difficulties. However, more negative judgements were made about YP without the label but with the same difficulties. Participants viewed the label as important for gaining support, yet highlighted the potential for discrimination in terms of access to diagnosis and resources. What was important to participants with dyslexia was not necessarily the label but the support that they received and how they were viewed by others. Implications for school professionals are discussed in terms of ensuring that YP feel empowered by the way they are described

    The Impact of COVID-19 on Utah Women and Work: Changes, Burnout, & Hope

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    The COVID-19 pandemic of 2020–2021 has impacted all Utahns in profound ways. Yet, a host of national and global reports have argued that women’s employment and careers have been disproportionately impacted during this time. For example, a McKinsey & Company and Lean In report stated that women are more likely to have been laid off or furloughed, leading to greater financial instability and stalled careers. The Institute for Women’s Policy Research reported that women, and particularly women of color, have unduly experienced job losses and have had greater struggles with managing paid work, caregiving responsibilities, and other types of unpaid work obligations. And the United Nations asserted that the COVID-19 pandemic has deepened preexisting inequalities across every sphere, including a global economy

    The Impact of COVID-19 on Utah Women and Work: Childcare and Homeschooling

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    The COVID-19 pandemic of 2020–2021 has impacted workers across the globe. Women have been disproportionately impacted during this time. At one point during the pandemic, a publication from the National Women’s Law Center reported that women dropped out of the workforce at a rate four times that of men. Utah has seen similar negative impacts on working women. The Kem C. Gardner Policy Institute at the University of Utah reported that from 2019 to 2020, jobs held by women declined at a rate more than double that of men, and unemployment rose more for females than males. One major reason for these discrepancies is likely the large burden women have carried for childcare and homeschooling children as daycare facilities and schools were closed in efforts to curb the spread of the virus. In fact, a McKinsey and Lean In study reported that, in dual-income households, mothers were three times more likely than fathers to bear the main responsibility for a majority of housework and childcare. Gallup recently confirmed that women with children left the workforce at a significantly greater rate than men with children

    The Impact of COVID-19 on Utah Women and Work: Resilient Mindset and Wellbeing

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    The COVID-19 pandemic of 2020–2021 continues to impact all Utahns’ daily lives. Nationally, the Bureau of Labor Statistics, Pew Research Center, the Federal Reserve Bank, and sources such as the Wall Street Journal continue to report that women’s employment and careers have been disproportionately impacted during this time. Utah has seen similar negative impacts on working women. For example, the Kem C. Gardner Policy Institute at the University of Utah reported that from 2019 to 2020, jobs held by women declined at a rate more than double that of men, and unemployment rose more for females than males

    Crassulacean acid metabolism guard cell anion channel activity follows transcript abundance and is suppressed by apoplastic malate

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    * Plants utilizing crassulacean acid metabolism (CAM) concentrate CO2 around RuBisCO while reducing transpirational water loss associated with photosynthesis. Unlike stomata of C3 and C4 species, CAM stomata open at night for the mesophyll to fix CO2 into malate (Mal) and store it in the vacuole. CAM plants decarboxylate Mal in the light, generating high CO2 concentrations within the leaf behind closed stomata for refixation by RuBisCO. * CO2 may contribute to stomatal closure but additional mechanisms, plausibly including Mal activation of anion channels, ensure closure in the light. * In the CAM species KalanchoĂ« fedtschenkoi, we found that guard cell anion channel activity, recorded under voltage clamp, follows KfSLAC1 and KfALMT12 transcript abundance, declining to near‐zero by the end of the light period. Unexpectedly, however, we found that extracellular Mal inhibited the anion current of KalanchoĂ« guard cells, both in wild‐type and RNAi mutants with impaired Mal metabolism. * We conclude that the diurnal cycle of anion channel gene transcription, rather than the physiological signal of Mal release, is a key factor in the inverted CAM stomatal cycle
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