5,491 research outputs found
Dismantling Bodies: The War on Terror, and the Wound Aesthetic of \u3cem\u3eCSI: Crime Scene Investigation (2000-2015)\u3c/em\u3e
This paper interrogates the aesthetic signature of CSI: Crime Scene Investigation (2000-2015). Utilizing a selection of representative episodes airing during George W. Bush’s first term, I analyze how CSI mobilizes a particular aesthetic of wounding in which wound sites,bodily and geographic, may be understood to serve as vulnerable apertures through which underlying threads of critical engagement with the direction of the 9/11 discourse may be aspirated from within the body of the text. Specifically, I approach the wound sites of CSI as sources of war-on-terror critique that serve political double-duty. On the one hand, CSI’s injury-centric narratives and accompanying wound aesthetic provide a canvas against which the traumatizing realities of 9/11 could be mediated and moderated for a newly death-anxious audience. On the other hand, the wound aesthetic ironically provides a recuperative narrative about the state’s ability to respond to political violence and prosecute its perpetrators
CHA Residents and the Plan for Transformation
This series of policy briefs presents findings from more than a decade of research on the people who lived in Chicago Housing Authority properties when the agencylaunched its Plan for Transformation in October 1999. The ongoing, multiyear effort sought to improve resident well-being by renovating or demolishing decaying public housing properties and replacing them with new, mixed-income development
Ultracompact Binaries as Bright X-Ray Sources in Elliptical Galaxies
Chandra observations of distant elliptical galaxies have revealed large
numbers of Low Mass X-ray Binaries (LMXBs) accreting at rates in excess of
10^{-8} solar masses per year. The majority of these LMXBs reside in globular
clusters (GCs) and it has been suggested that many of the field LMXBs also
originated in GCs. We show here that ultracompact binaries with orbital periods
of 8-10 minutes and He or C/O donors of 0.06-0.08 solar masses naturally
provide the observed accretion rates from gravitational radiation losses alone.
Such systems are predicted to be formed in the dense GC environment, a
hypothesis supported by the 11.4 minute binary 4U 1820-30, the brightest
persistent LMXB in a Galactic GC. These binaries have short enough lifetimes
(less then 3 Myr) while bright that we calculate their luminosity function
under a steady-state approximation. This yields a luminosity function slope in
agreement with that observed for luminosities in the range of 6E37 ergs/sec to
5E38 ergs/sec, encouraging us to use the observed numbers of LMXBs per GC mass
to calculate the accumulated number of ultracompact binaries. For a constant
birthrate over 8 Gyrs, the number of ultracompact binaries which have evolved
through this bright phase is nearly 4000 in a 10 million solar mass GC,
consistent with dynamical interaction calculations. Perhaps most importantly,
if all ultracompacts become millisecond radio pulsars, then the observed
normalization agrees with the inferred number of millisecond radio pulsars in
47 Tuc and Galactic GCs in general.Comment: to Appear in Astrophysical Journal Letter
Genotypic Variation in a Foundation Tree (\u3ci\u3ePopulus tremula\u3c/i\u3e L.) Explains Community Structure of Associated Epiphytes
Community genetics hypothesizes that within a foundation species, the genotype of an individual significantly influences the assemblage of dependent organisms. To assess whether these intra-specific genetic effects are ecologically important, it is required to compare their impact on dependent organisms with that attributable to environmental variation experienced over relevant spatial scales. We assessed bark epiphytes on 27 aspen (Populus tremula L.) genotypes grown in a randomized experimental array at two contrasting sites spanning the environmental conditions from which the aspen genotypes were collected. We found that variation in aspen genotype significantly influenced bark epiphyte community composition, and to the same degree as environmental variation between the test sites. We conclude that maintaining genotypic diversity of foundation species may be crucial for conservation of associated biodiversity
Heat transfer in rapidly rotating convection with heterogeneous thermal boundary conditions
Convection in the metallic cores of terrestrial planets is likely to be subjected to lateral variations in heat flux through the outer boundary imposed by creeping flow in the overlying silicate mantles. Boundary anomalies can significantly influence global diagnostics of core convection when the Rayleigh number, Ra, is weakly supercritical; however, little is known about the strongly supercritical regime appropriate for planets. We perform numerical simulations of rapidly rotating convection in a spherical shell geometry and impose two patterns of boundary heat flow heterogeneity: a hemispherical Y¹₁ spherical harmonic pattern; and one derived from seismic tomography of the Earth’s lower mantle. We consider Ekman numbers 10⁻⁴ ≤E≤10⁻⁶, flux-based Rayleigh numbers up to 800 times critical, and a Prandtl number of unity. The amplitude of the lateral variation in heat flux is characterised by q^{∗}_{L} = 0, 2.3, 5.0, the peak-to-peak amplitude of the outer boundary heat flux divided by its mean. We find that the Nusselt number, Nu, can be increased by up to 25% relative to the equivalent homogeneous case due to boundary-induced correlations between the radial velocity and temperature anomalies near the top of the shell. The Nu enhancement tends to become greater as the amplitude and length scale of the boundary heterogeneity are increased and as the system becomes more supercritical. This Ra dependence can steepen the Nu α Ra^{γ} scaling in the rotationally dominated regime, with γ for our most extreme case approximately 20% greater than the equivalent homogeneous scaling. Therefore, it may be important to consider boundary heterogeneity when extrapolating numerical results to planetary conditions
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Effects of two contrasting canopy manipulations on growth and water use of London plane (Platanus x acerifolia) trees
Aims: Two contrasting canopy manipulations were compared to unpruned controls on London plane trees, to determine the effects on canopy regrowth, soil and leaf water relations.
Methods: ‘Canopy reduction’, was achieved by removing the outer 30 % length of all major branches and ‘canopy thinning’, by removing 30 % of lateral branches arising from major branches.
Results: Total canopy leaf areas recovered within two and three years of pruning for the canopy-thinned and reduced trees respectively. Canopy reduction increased mean leaf size, nitrogen concentration, canopy leaf area density and conserved soil moisture for up to 3 years, whereas canopy thinning had no effects. Another experiment compared more severe canopy reduction to unpruned trees. This produced a similar growth response to the previous experiment, but soil moisture was conserved nearer to the trunk. Analysis of 13C and 18O signals along with leaf water relations and soil moisture data suggested that lower boundary layer conductance within the canopy-reduced trees restricted tree water use, whereas for the canopy-thinned trees the opposite occurred.
Conclusions: Only canopy reduction conserved soil moisture and this was due to a combination of reduced total canopy leaf area and structural changes in canopy architecture
EPICOG-SCH: A brief battery to screen cognitive impact of schizophrenia in stable outpatients
Brief batteries in schizophrenia, are needed to screen for the cognitive impact of schizophrenia. We aimed to validate and co-norm the Epidemiological Study of Cognitive Impairment in Schizophrenia (EPICOG-SCH) derived brief cognitive battery. A cross-sectional outpatient evaluation was conducted of six-hundred-seventy-two patients recruited from 234 centers. The brief battery included well-known subtests available worldwide that cover cognitive domains related to functional outcomes: WAIS-III-Letter-Number-Sequencing-LNS, Category Fluency Test-CFT, Logical-Memory Immediate Recall-LM, and Digit-Symbol-Coding-DSC. CGI-SCH Severity and WHO-DAS-S were used to assess clinical severity and functional impairment, respectively. Unit Composite Score (UCS) and functional regression-weighted Composite Scores (FWCS) were obtained; discriminant properties of FWCS to identify patients with different levels of functional disability were analyzed using receiver-operating characteristic (ROC) technique. The battery showed good internal consistency, Cronbach's alpha = 0.78. The differences between cognitive performance across CGI-SCH severity level subscales ranged from 0.5 to 1 SD. Discriminant capacity of the battery in identifying patients with up to moderate disability levels showed fair discriminant accuracy with areas under the curve (AUC) > 0.70, p < 0.0001. An FWCS mean cut-off score ≥ 100 showed likelihood ratios (LR) up to 4.7, with an LR+ of 2.3 and a LR− of 0.5. An FWCS cut-off ≥ 96 provided the best balance between sensitivity (0.74) and specificity (0.62).
The EPICOG-SCH proved to be a useful brief tool to screen for the cognitive impact of schizophrenia, and its regression-weighted Composite Score was an efficient complement to clinical interviews for confirming patients' potential functional outcomes and can be useful for monitoring cognition during routine outpatient follow-up visits
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