709 research outputs found
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Assessing the probability of patients reoffending after discharge from low to medium secure forensic mental health services: An inductive prevention paradox
Citizens of developed societies are troubled by those who commit âirrational' crimes against the person. Reoffending by ex-patients following their release from secure mental health services triggers particularly intense angst when amplified by media and political scrutiny. Forensic mental health service providers are expected to minimise the occurrence of such transgressions by releasing only those patients who are judged acceptably unlikely to reoffend. However, reoffending probabilities can only be estimated by observing behaviour in secure institutional settings designed specifically to prevent patients from transgressing. The article explores this âinductive prevention paradox' which arises when the implementation of measures designed to avoid an adverse event obscures direct observation of what might have happened if prophylaxis had not been attempted. The analysis presented draws on data obtained in 1999â2003 from two qualitative studies in medium to low secure UK institutions, one providing forensic mental health services and the other forensic learning disability services. We explored the views of 56 staff members and 21 patients about risk management in forensic services and undertook additional 25 staff interviews for case studies of the 21 patients. The wider applicability of the inductive prevention paradox will be considered in the Discussion. We argue that the prognostic limitations arising from prevention have been underestimated by policy makers and in official inquiries; and that the prevailing personal risk assessment framework needs to be complemented by greater attention to the environments which patients will be discharged into
One year of monitoring the Vela pulsar using a Phased Array Feed
We have observed the Vela pulsar for one year using a Phased Array Feed (PAF)
receiver on the 12-metre antenna of the Parkes Test-Bed Facility. These
observations have allowed us to investigate the stability of the PAF
beam-weights over time, to demonstrate that pulsars can be timed over long
periods using PAF technology and to detect and study the most recent glitch
event that occurred on 12 December 2016. The beam-weights are shown to be
stable to 1% on time scales on the order of three weeks. We discuss the
implications of this for monitoring pulsars using PAFs on single dish
telescopes.Comment: 6 pages, 4 figures, 2 tables. Accepted for publication in PAS
The Swift BAT Survey Detects Two Optical Broad Line, X-ray Heavily Obscured Active Galaxies: NVSS 193013+341047 and IRAS 05218-1212
The Swift Burst Alert Telescope (BAT) is discovering interesting new objects
while monitoring the sky in the 14-195 keV band. Here we present the X-ray
properties and spectral energy distributions for two unusual AGN sources. Both
NVSS 193013+341047 and IRAS 05218-1212 are absorbed, Compton-thin, but heavily
obscured (NH \sim 10^23 cm-2), X-ray sources at redshifts < 0.1. The spectral
energy distributions reveal these galaxies to be very red, with high extinction
in the optical and UV. A similar SED is seen for the extremely red objects
(EROs) detected in the higher redshift universe. This suggests that these
unusual BAT-detected sources are a low- redshift (z << 1) analog to EROs, which
recent evidence suggests are a class of the elusive type II quasars. Studying
the multi-wavelength properties of these sources may reveal the properties of
their high redshift counterparts.Comment: 20 pages, accepted to Ap
XMM-Newton Archival Study of the ULX Population in Nearby Galaxies
We present the results of an archival XMM-Newton study of the bright X-ray
point sources (L_X > 10^38 erg/s) in 32 nearby galaxies. From our list of
approximately 100 point sources, we attempt to determine if there is a
low-state counterpart to the Ultraluminous X-ray (ULX) population, searching
for a soft-hard state dichotomy similar to that known for Galactic X-ray
binaries and testing the specific predictions of the IMBH hypothesis. To this
end, we searched for "low-state" objects, which we defined as objects within
our sample which had a spectrum well fit by a simple absorbed power law, and
"high-state" objects, which we defined as objects better fit by a combined
blackbody and a power law. Assuming that ``low-state'' objects accrete at
approximately 10% of the Eddington luminosity (Done & Gierlinski 2003) and that
"high-state" objects accrete near the Eddington luminosity we further divided
our sample of sources into low and high state ULX sources. We classify 16
sources as low-state ULXs and 26 objects as high-state ULXs. As in Galactic
black hole systems, the spectral indices, Gamma, of the low-state objects, as
well as the luminosities, tend to be lower than those of the high-state
objects. The observed range of blackbody temperatures for the high state is
0.1-1 keV, with the most luminous systems tending toward the lowest
temperatures. We therefore divide our high-state ULXs into candidate IMBHs
(with blackbody temperatures of approximately 0.1 keV) and candidate stellar
mass BHs (with blackbody temperatures of approximately 1.0 keV). A subset of
the candidate stellar mass BHs have spectra that are well-fit by a
Comptonization model, a property similar of Galactic BHs radiating in the
"very-high" state near the Eddington limit.Comment: 54 pages, submitted to ApJ (March 2005), accepted (May 2006); changes
to organization of pape
Exploring the Professional Development Needs of Teachers Regarding Trauma-and-Violence-Informed-Care
While Trauma-and-Violence-Informed-Care (TVIC) within classrooms promotes safety for all students, it is especially important for those with past or ongoing experiences of trauma and violenceâand for those with unique stressors, such as military-connected students (MCS). The current study therefore sought to determine when and how best to present teachers with TVIC training. Correlation and regression analyses were conducted to examine survey responses from 89 Ontario teachers and teacher candidates, and twelve follow-up interviews were examined using reflexive thematic analysis. Results show that organizational support and teacher wellness are important for promoting effective professional development (PD). Teachers, whose limited resources and increased responsibilities make engaging in PD difficult, desire authenticity, autonomy, trust, and collaboration. Implications for teacher PD and education systems are discussed. This study is one of few to acknowledge support for teachers of MCS and highlights the need for increased understanding of structural sources of violence and stress
Playing Active Video Games may not develop movement skills: an intervention trial
Background: To investigate the impact of playing sports Active Video Games on children\u27s actual and perceived object control skills. Methods: Intervention children played Active Video Games for 6. weeks (1. h/week) in 2012. The Test of Gross Motor Development-2 assessed object control skill. The Pictorial Scale of Perceived Movement Skill Competence assessed perceived object control skill. Repeated measurements of object control and perceived object control were analysed for the whole sample, using linear mixed models, which included fixed effects for group (intervention or control) and time (pre and post) and their interaction. The first model adjusted for sex only and the second model also adjusted for age, and prior ball sports experience (yes/no). Seven mixed-gender focus discussions were conducted with intervention children after programme completion. Results: Ninety-five Australian children (55% girls; 43% intervention group) aged 4 to 8. years (M 6.2, SD 0.95) participated. Object control skill improved over time (p=0.006) but there was no significant difference (p=0.913) between groups in improvement (predicted means: control 31.80 to 33.53, SED=0.748; intervention 30.33 to 31.83, SED=0.835). A similar result held for the second model. Similarly the intervention did not change perceived object control in Model 1 (predicted means: control: 19.08 to 18.68, SED=0.362; intervention 18.67 to 18.88, SED=0.406) or Model 2. Children found the intervention enjoyable, but most did not perceive direct equivalence between Active Video Games and \u27real life\u27 activities. Conclusions: Whilst Active Video Game play may help introduce children to sport, this amount of time playing is unlikely to build skill
X-ray properties of an Unbiased Hard X-ray Detected Sample of AGN
The SWIFT gamma ray observatory's Burst Alert Telescope (BAT) has detected a
sample of active galactic nuclei (AGN) based solely on their hard X-ray flux
(14-195 keV). In this paper, we present for the first time {\it XMM-Newton}
X-ray spectra for 22 BAT AGNs with no previously analyzed X-ray spectra. If our
sources are a representative sample of the BAT AGN, as we claim, our results
present for the first time global X-ray properties of an unbiased towards
absorption (n), AGN
sample. We find 9/22 low absorption (n cm), simple power
law model sources, where 4 of these sources have a statistically significant
soft component. Among these sources, we find the presence of a warm absorber
statistically significant for only one Seyfert 1 source, contrasting with the
ASCA results of \citet{rey97} and \citet{geo98}, who find signatures of warm
absorption in half or more of their Seyfert 1 samples at similar redshifts.
Additionally, the remaining sources (14/22) have more complex spectra, well-fit
by an absorbed power law at keV. Five of the complex sources are
classified as Compton-thick candidates. Further, we find four more sources with
properties consistent with the hidden/buried AGN reported by Ueda {\it et al.}
(2007). Finally, we include a comparison of the {\it XMM-Newton} EPIC spectra
with available SWIFT X-ray Telescope (XRT) observations. From these
comparisons, we find 6/16 sources with varying column densities, 6/16 sources
with varying power law indices, and 13/16 sources with varying fluxes, over
periods of hours to months. Flux and power law index are correlated for objects
where both parameters vary.Comment: 39 pages, 16 figures, accepted to Ap
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Quality and Publication of Emergency Medicine Trials Registered in ClinicalTrials.gov
Introduction: Promoting emergency medicine (EM) clinical trials research remains a priority. To characterize the status of clinical EM research, this study assessed trial quality, funding source, and publication of EM clinical trials and compared EM and non-EM trials on these key metrics. We also examined the volume of EM trials and their subspecialty areas.Methods: We abstracted data from ClinicalTrials.gov (February 2000 - September 2013) and used individual study National Clinical Trial numbers to identify published trials (January 2007 - September 2016). We used descriptive statistics and chi-square tests to examine study characteristics by EM and non-EM status, and Kaplan-Meier curves and log-rank tests to compare time to publication of completed EM and non-EM studies.Results: We found 638 interventional EM trials and 59,512 non-EM interventional trials conducted in the United States between February 2000 and September 2013, registered on ClinicalTrials.gov. EM studies were significantly less likely than non-EM studies to be National Institutes of Health-funded or to evaluate a drug or biologic. However, EM studies had significantly larger sample sizes, and were significantly more likely to use randomization and blinding. Overall, 34.3% of EM and 26.0% of non-EM studies were published in peer-reviewed journals. By subspecialty, more EM trials concerned medical/surgical and psychiatric/neurological conditions than trauma.Conclusion: Although EM studies were less likely to have received federal or industry funding, and the EM portfolio consisted of only 638 trials over the 14-year study period, the quality of EM trials surpassed that of non-EM trials, based on indices such as randomization and blinding. This novel finding bodes well for the future of clinical EM research, as does the higher proportion of published EM than non-EM trials. Our study also revealed that trauma studies were under-represented among EM studies. Periodic assessment of EM trials with the metrics used here could provide an informative and valuable longitudinal view of progress in clinical EM research
Elemental Abundances of Nearby Galaxies through High Signal-to-Noise XMM-Newton Observations of ULXs
(abridged) In this paper, we examined XMM Newton EPIC spectra of 14
ultra-luminous X-ray sources (ULXs)in addition to the XMM RGS spectra of two
sources (Holmberg II X-1 and Holmberg IX X-1). We determined oxygen and iron
abundances of the host galaxy's interstellar medium (ISM) using K-shell (O) and
L-shell (Fe) X-ray photo-ionization edges towards these ULXs. We found that the
oxygen abundances closely matched recent solar abundances for all of our
sources, implying that ULXs live in similar local environments despite the wide
range of galaxy host properties. Also, we compare the X-ray hydrogen column
densities (n_H) for 8 ULX sources with column densities obtained from radio H I
observations. The X-ray model n_H values are in good agreement with the H I n_H
values, implying that the hydrogen absorption towards the ULXs is not local to
the source (with the exception of the source M81 XMM1). In order to obtain the
column density and abundance values, we fit the X-ray spectra of the ULXs with
a combined power law and one of several accretion disk models. We tested the
abundances obtained from the XSPEC models bbody, diskbb, grad, and diskpn along
with a power law, finding that the abundances were independent of the thermal
model used. We comment on the physical implications of these different model
fits. We also note that very deep observations allow a breaking of the
degeneracy noted by Stobbart et al. (2006) favoring a high mass solution for
the absorbed grad + power law model.Comment: 18 pages, accepted to Ap
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