46 research outputs found
Crystalline Silicate Emission in the Protostellar Binary Serpens--SVS20
We present spatially resolved mid-infrared spectroscopy of the class
I/flat-spectrum protostellar binary system SVS20 in the Serpens cloud core. The
spectra were obtained with the mid-infrared instrument T-ReCS on Gemini-South.
SVS20-South, the more luminous of the two sources, exhibits a mid-infrared
emission spectrum peaking near 11.3 \micron, while SVS20-North exhibits a
shallow amorphous silicate absorption spectrum with a peak optical depth of
. After removal of the the line-of-sight extinction by the
molecular common envelope, the ``protostar-only'' spectra are found to be
dominated by strong amorphous olivine emission peaking near 10 \micron. We also
find evidence for emission from crystalline forsterite and enstatite associated
with both SVS20-S and SVS20-N. The presence of crystalline silicate in such a
young binary system indicates that the grain processing found in more evolved
HAeBe and T Tauri pre-main sequence stars likely begins at a relatively young
evolutionary stage, while mass accretion is still ongoing.Comment: Accepted for publication by The Astrophysical Journa
SOFIA/FORCAST resolves 30–40 μm extended dust emission in nearby active galactic nuclei
We present arcsecond-scale observations of the active galactic nuclei (AGNs)
of seven nearby Seyfert galaxies observed from the Stratospheric Observatory
For Infrared Astronomy (SOFIA) using the 31.5 and 37.1 um filters of the Faint
Object infraRed CAmera for the SOFIA Telescope (FORCAST). We isolate unresolved
emission from the torus and find extended diffuse emission in six 37.1 um
residual images in our sample. Using Spitzer/IRS spectra, we determine the
dominant mid-infrared (MIR) extended emission source and attribute it to dust
in the narrow line region (NLR) or star formation. We compare the optical NLR
and radio jet axes to the extended 37.1 um emission and find coincident axes
for three sources. For those AGNs with extended emission coincident with the
optical axis, we find that spatial scales of the residual images are consistent
with 0.1 - 1 kpc scale distances to which dust can be heated by the AGN. Using
previously published subarcsecond 1 - 20 um imaging and spectroscopic data
along with our new observations, we construct broadband spectral energy
distributions (SEDs) of the AGNs at wavelengths 1 - 40 um. We find that three
AGNs in our sample tentatively show a turnover in the SED between 30 - 40 um.
Using results from Clumpy torus models and the Bayesian inference tool
BayesClumpy, we find that the posterior outputs for AGNs with MIR turnover
revealed by SOFIA/FORCAST have smaller uncertainties than AGNs that do not show
a turnover.Comment: 16 pages, 9 figure
Self-management support interventions for stroke survivors: a systematic meta-review
There is considerable policy interest in promoting self-management in patients with long-term conditions, but it remains uncertain whether these interventions are effective in stroke patients.Systematic meta-review of the evidence for self-management support interventions with stroke survivors to inform provision of healthcare services.We searched MEDLINE, EMBASE, CINAHL, PsychINFO, AMED, BNI, Database of Abstracts of Reviews for Effectiveness, and Cochrane Database of Systematic Reviews for systematic reviews of self-management support interventions for stroke survivors. Quality was assessed using the R-AMSTAR tool, and data extracted using a customised data extraction form. We undertook a narrative synthesis of the reviews' findings.From 12,400 titles we selected 13 systematic reviews (published 2003-2012) representing 101 individual trials. Although the term 'self-management' was rarely used, key elements of self-management support such as goal setting, action planning, and problem solving were core components of therapy rehabilitation interventions. We found high quality evidence that supported self-management in the context of therapy rehabilitation delivered soon after the stroke event resulted in short-term (< 1 year) improvements in basic and extended activities of daily living, and a reduction in poor outcomes (dependence/death). There is some evidence that rehabilitation and problem solving interventions facilitated reintegration into the community.Self-management terminology is rarely used in the context of stroke. However, therapy rehabilitation currently successfully delivers elements of self-management support to stroke survivors and their caregivers with improved outcomes. Future research should focus on managing the emotional, medical and social tasks of long-term survivorship
An Open Source Corpus and Recording Software for Distant Speech Recognition with the Microsoft Kinect
A basic requirement for improvements in distant speech recognition is the availability of a respective corpus of recorded utterances. With microphone arrays now available off-the-shelf as part of the Microsoft Kinect, a common recording device for such a corpus is wide-spread. In this paper, we introduce KiSRecord, an open source recording tool that can be used to alleviate this situation for data collection. Thus, we provide the first steps towards a community sourcing effort for a speech corpus recorded with de-facto standard microphone arrays