466 research outputs found

    Custom, conflict and the construction of heritage: European huts on the Tasmanian central plateau

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    Since the 1990s, cultural heritage managers have become increasingly interested in the intangible as the way that local communities create value for cultural heritage places. The present paper uses historical and ethnographic information on the practices of people living below the Great Western Tiers in Tasmania to examine the way these people turned the huts on the Central Plateau into heritage. Increased environmental regulation in the late 1980s and early 1990s resulting from the inclusion of the Central Plateau in the Tasmanian Wilderness World Heritage Area disrupted a range of practices that maintained communal attachment to and 'ownership' of the land. Some of the people living below the Great Western Tiers responded by using the huts on the plateau to memorialise their past attachments to the mountain. But this created a new status for huts as heritage, and both the regulator and the regulated agreed that this category of buildings now needed managing. This fundamentally altered the nature of the communal attachment to parts of the Central Plateau because it required an acceptance of the regulatory framework that had disrupted the practices that were the basis of the original 'communal' ownership of land

    Warkworth 12-m VLBI Station: WARK12M

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    This report summarizes the geodetic VLBI activities in New Zealand in 2010. It provides geographical and technical details of WARK12M - the new IVS network station operated by the Institute for Radio Astronomy and Space Research (IRASR) of Auckland University of Technology (AUT). The details of the VLBI system installed in the station are outlined along with those of the collocated GNSS station. We report on the status of broadband connectivity and on the results of testing data transfer protocols; we investigate UDP protocols such as 'tsunami' and UDT and demonstrate that the UDT protocol is more efficient than 'tsunami' and 'ftp'. In general, the WARK12M IVS network station is fully equipped, connected and tested to start participating in regular IVS observational sessions from the beginning of 2011.Comment: 5 pages, 1 figure, Accepeted for the IVS 2010 Annual Repor

    Ask first: a guide to respecting indigenous heritage places and values: issues and gaps analysis

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    The purpose of Aboriginal and Torres Strait Islander heritage conservation in Ask First is unusual because it does not simply focus on the place and its values. Rather, it states that the primary purpose is to sustain the relationship between Aboriginal and Torres Strait Islander people and their heritage places. This definition attempts to encapsulate the obligation that traditional owners have to care for their country, and that sustaining this relationship is fundamental to the conservation of Aboriginal and Torres Strait Islander heritage

    Assessment of the indigenous national heritage values for Wurrwurrwuy stone picture site

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    The stone pictures at Wurrwurrwuy might be nationally significant as a rare example of stones arranged to depict secular subjects rather than the arranged stones being associated with ceremony and the sacred. The stone pictures depict a range of subjects including Aboriginal camps, fish traps and images relating to the Macassan trepang industry including praus, canoes, the stone fireplaces where trepang were boiled and Macassan houses. The depictions of praus at Wurrwurrwuy show the internal arrangements of the vessels, which is rare in Aboriginal depictions of praus in any medium. The creators of the stone pictures would have acquired their knowledge of the internal arrangement of praus during visits to, or voyages on, such vessels

    The effects of velocities and lensing on moments of the Hubble diagram

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    We consider the dispersion on the supernova distance-redshift relation due to peculiar velocities and gravitational lensing, and the sensitivity of these effects to the amplitude of the matter power spectrum. We use the MeMo lensing likelihood developed by Quartin, Marra & Amendola (2014), which accounts for the characteristic non-Gaussian distribution caused by lensing magnification with measurements of the first four central moments of the distribution of magnitudes. We build on the MeMo likelihood by including the effects of peculiar velocities directly into the model for the moments. In order to measure the moments from sparse numbers of supernovae, we take a new approach using Kernel Density Estimation to estimate the underlying probability density function of the magnitude residuals. We also describe a bootstrap re-sampling approach to estimate the data covariance matrix. We then apply the method to the Joint Light-curve Analysis (JLA) supernova catalogue. When we impose only that the intrinsic dispersion in magnitudes is independent of redshift, we find σ8=0.440.44+0.63\sigma_8=0.44^{+0.63}_{-0.44} at the one standard deviation level, although we note that in tests on simulations, this model tends to overestimate the magnitude of the intrinsic dispersion, and underestimate σ8\sigma_8. We note that the degeneracy between intrinsic dispersion and the effects of σ8\sigma_8 is more pronounced when lensing and velocity effects are considered simultaneously, due to a cancellation of redshift dependence when both effects are included. Keeping the model of the intrinsic dispersion fixed as a Gaussian distribution of width 0.14 mag, we find σ8=1.070.76+0.50\sigma_8 = 1.07^{+0.50}_{-0.76}.Comment: 16 pages, updated to match version accepted in MNRA

    Observing the earliest moments of supernovae using strong gravitational lenses

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    We determine the viability of exploiting lensing time delays to observe strongly gravitationally lensed supernovae (gLSNe) from first light. Assuming a plausible discovery strategy, the Legacy Survey of Space and Time (LSST) and the Zwicky Transient Facility (ZTF) will discover \sim 110 and \sim 1 systems per year before the supernova (SN) explosion in the final image respectively. Systems will be identified 11.79.3+29.811.7^{+29.8}_{-9.3} days before the final explosion. We then explore the possibility of performing early-time observations for Type IIP and Type Ia SNe in LSST-discovered systems. Using a simulated Type IIP explosion, we predict that the shock breakout in one trailing image per year will peak at \lesssim 24.1 mag (\lesssim 23.3) in the BB-band (F218WF218W), however evolving over a timescale of \sim 30 minutes. Using an analytic model of Type Ia companion interaction, we find that in the BB-band we should observe at least one shock cooling emission event per year that peaks at \lesssim 26.3 mag (\lesssim 29.6) assuming all Type Ia gLSNe have a 1 M_\odot red giant (main sequence) companion. We perform Bayesian analysis to investigate how well deep observations with 1 hour exposures on the European Extremely Large Telescope would discriminate between Type Ia progenitor populations. We find that if all Type Ia SNe evolved from the double-degenerate channel, then observations of the lack of early blue flux in 10 (50) trailing images would rule out more than 27% (19%) of the population having 1 M_\odot main sequence companions at 95% confidence.Comment: 17 pages, 15 figures (including appendices). Accepted by MNRAS 3rd May 202

    Endothelial colony-forming cells and pro-angiogenic cells: clarifying definitions and their potential role in mitigating acute kidney injury

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    Acute kidney injury (AKI) represents a significant clinical concern that is associated with high mortality rates and also represents a significant risk factor for the development of chronic kidney disease (CKD). This article will consider alterations in renal endothelial function in the setting of AKI that may underlie impairment in renal perfusion and how inefficient vascular repair may manifest post-AKI and contribute to the potential transition to CKD. We provide updated terminology for cells previously classified as ‘endothelial progenitor’ that may mediate vascular repair such as pro-angiogenic cells and endothelial colony-forming cells. We consider how endothelial repair may be mediated by these different cell types following vascular injury, particularly in models of AKI. We further summarize the potential ability of these different cells to mitigate the severity of AKI, improve perfusion and maintain vascular structure in pre-clinical studies

    Trends in Youth Victimization and Well-Being, and Implications for Youth Policy

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    Youth victimization concerns have engaged educators, public health officials, and the media for many years. Cases of child victimization regularly make headlines, and in recent years public concern has focused in particular on sexual abuse, child abductions, online predators, school shootings, bullying, and cyberbullying. But little attention has been given to evidence for substantial declines in child victimizations over the past 20 years. Even for internet victimization, an area of high current public anxiety, trend data do not suggest a growing epidemic but instead find that some types of online victimization have declined over the past decade. The failure to successfully promote information about positive youth victimization trends means that the public, professionals, and policy makers are making decisions based on unbalanced information. Attention is often directed erroneously, and we are prevented from identifying what policies and practices work best at helping improve youth safety even further. This report discusses the trends in various forms of child victimization and well-being, the potential reasons for these trends, and the implications of these findings for policy makers
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