297 research outputs found
THE COTTON TEXTILE INDUSTRY OF COCHABAMBA, 1770- 1810: THE OPPORTUNITIES AND LIMITS OF GROWTH
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Preferred developmental disabilties among prospective adoptive parents
This study was done to examine prospective adoptive parents\u27 perceptions of one particular group of special needs children waiting for adoption: those children with developmental disabilities. The results will give social workers information that will help provide training and informational meetings to prosepctive parents in regard to the child\u27s age and developmental disabilities
Occupational Therapy’s Role in Post CVA Education
The average literacy rate for healthcare client education materials is currently 11th-16th grade (Dignan & Hunter, 2015). Due to cognitive impairments, difficulty understanding healthcare education materials increases after experiencing a stroke (Danzl et al., 2016). Poor health education results in lower adherence to treatment and limited participation in everyday activities at home (DeMarco, Nystrom, & Salvatore, 2011). Clients and caregivers specifically reported a lack of understanding of post-stroke impairments (O\u27Connell, Baker, & Prosser, 2003).
A literature review was conducted on topics related to health literacy, post-stroke residual deficits, client education, and occupational therapy’s role in client education. There was an area of research literature under-explored regarding the high literacy level of education materials and the low literacy level of individuals post-stroke. Based on the results from the literature, the Post-Stroke Client Education Guide was developed to provide a tool for occupational therapists to use that incorporates the recommended grade level and methods for development of healthcare education materials. The Model of Human Occupation and Adult Learning Theory were used to guide the development of the education guide.
The purpose of this scholarly project was to develop an evidence-based educational tool for occupational therapists to share information regarding post-stroke residual deficits with clients and caregivers. Evidence-based strategies including grade level, multiple methods of delivery, and design were used throughout the product to increase client understandability. The educational guide will help facilitate client recovery, as well as enhance client and caregiver ability to manage residual deficits at home while completing everyday occupations, routines, and roles
A Systematic Search for Molecular Outflows Toward Candidate Low-Luminosity Protostars and Very Low Luminosity Objects
We present a systematic single-dish search for molecular outflows toward a
sample of 9 candidate low-luminosity protostars and 30 candidate Very Low
Luminosity Objects (VeLLOs; L_int < 0.1 L_sun). The sources are identified
using data from the Spitzer Space Telescope catalogued by Dunham et al. toward
nearby (D < 400 pc) star forming regions. Each object was observed in 12CO and
13CO J = 2-1 simultaneously using the sideband separating ALMA Band-6 prototype
receiver on the Heinrich Hertz Telescope at 30 arcsecond resolution. Using
5-point grid maps we identify five new potential outflow candidates and make
on-the-fly maps of the regions surrounding sources in the dense cores B59,
L1148, L1228, and L1165. Of these new outflow candidates, only the map of B59
shows a candidate blue outflow lobe associated with a source in our survey. We
also present larger and more sensitive maps of the previously detected L673-7
and the L1251-A IRS4 outflows and analyze their properties in comparison to
other outflows from VeLLOs. The accretion luminosities derived from the outflow
properties of the VeLLOs with detected CO outflows are higher than the observed
internal luminosity of the protostars, indicating that these sources likely had
higher accretion rates in the past. The known L1251-A IRS3 outflow is detected
but not remapped. We do not detect clear, unconfused signatures of red and blue
molecular wings toward the other 31 sources in the survey indicating that
large-scale, distinct outflows are rare toward this sample of candidate
protostars. Several potential outflows are confused with kinematic structure in
the surrounding core and cloud. Interferometric imaging is needed to
disentangle large-scale molecular cloud kinematics from these potentially weak
protostellar outflows.Comment: 42 pages, 19 figures, Accepted for publication in the Astronomical
Journa
Methylation of Leukocyte DNA and Ovarian Cancer: Relationships with Disease Status and Outcome
Genome-wide interrogation of DNA methylation (DNAm) in blood-derived leukocytes has become feasible with the advent of CpG genotyping arrays. In epithelial ovarian cancer (EOC), one report found substantial DNAm differences between cases and controls; however, many of these disease-associated CpGs were attributed to differences in white blood cell type distributions. We examined blood-based DNAm in 336 EOC cases and 398 controls; we included only high-quality CpG loci that did not show evidence of association with white blood cell type distributions to evaluate association with case status and overall survival
The Mass-Size Relation from Clouds to Cores. II. Solar Neighborhood Clouds
We measure the mass and size of cloud fragments in several molecular clouds
continuously over a wide range of spatial scales (0.05 < r / pc < 3). Based on
the recently developed "dendrogram-technique", this characterizes dense cores
as well as the enveloping clouds. "Larson's 3rd Law" of constant column
density, m(r) = C*r^2, is not well suited to describe the derived mass-size
data. Solar neighborhood clouds not forming massive stars (< 10 M_sun; Pipe
Nebula, Taurus, Perseus, and Ophiuchus) obey m(r) < 870 M_sun (r / pc)^1.33 .
In contrast to this, clouds forming massive stars (Orion A, G10.150.34,
G11.110.12) do exceed the aforementioned relation. Thus, this limiting
mass-size relation may approximate a threshold for the formation of massive
stars. Across all clouds, cluster-forming cloud fragments are found to be---at
given radius---more massive than fragments devoid of clusters. The
cluster-bearing fragments are found to roughly obey a mass-size law m =
C*r^1.27 (where the exponent is highly uncertain in any given cloud, but is
certainly smaller than 1.5).Comment: accepted to the Astrophysical Journa
Rapid Variations in Fluid Chemistry Constrain Hydrothermal Phase Separation at the Main Endeavour Field
Previous work at the Main Endeavour Field (MEF) has shown that chloride concentration in high-temperature vent fluids has not exceeded 510 mmol/kg (94% of seawater), which is consistent with brine condensation and loss at depth, followed by upward flow of a vapor phase toward the seafloor. Magmatic and seismic events have been shown to affect fluid temperature and composition and these effects help narrow the possibilities for sub-surface processes. However, chloride-temperature data alone are insufficient to determine details of phase separation in the upflow zone. Here we use variation in chloride and gas content in a set of fluid samples collected over several days from one sulfide chimney structure in the MEF to constrain processes of mixing and phase separation. The combination of gas (primarily magmatic CO2 and seawater-derived Ar) and chloride data, indicate that neither variation in the amount of brine lost, nor mixing of the vapor phase produced at depth with variable quantities of (i) brine or (ii) altered gas rich seawater that has not undergone phase separation, can explain the co-variation of gas and chloride content. The gas-chloride data require additional phase separation of the ascending vapor-like fluid. Mixing and gas partitioning calculations show that near-critical temperature and pressure conditions can produce the fluid compositions observed at Sully vent as a vapor-liquid conjugate pair or as vapor-liquid pair with some remixing, and that the gas partition coefficients implied agree with theoretically predicted values
Deep Near-Infrared Survey of the Pipe Nebula II: Data, Methods, and Dust Extinction Maps
We present a new set of high resolution dust extinction maps of the nearby
and essentially starless Pipe Nebula molecular cloud. The maps were constructed
from a concerted deep near-infrared imaging survey with the ESO-VLT, ESO-NTT,
CAHA 3.5m telescopes, and 2MASS data. The new maps have a resolution three
times higher than the previous extinction map of this cloud by Lombardi et al.
(2006) and are able to resolve structure down to 2600 AU. We detect 244
significant extinction peaks across the cloud. These peaks have masses between
0.1 and 18.4 M_sun, diameters between 1.2 and 5.7e4 AU (0.06 and 0.28 pc), and
mean densities of about 1e4 cm, all in good agreement with previous
results. From the analysis of the Mean Surface Density of Companions we find a
well defined scale near 1.4e4 AU below which we detect a significant decrease
in structure of the cloud. This scale is smaller than the Jeans Length
calculated from the mean density of the peaks. The surface density of peaks is
not uniform but instead it displays clustering. Extinction peaks in the Pipe
Nebula appear to have a spatial distribution similar to the stars in Taurus,
suggesting that the spatial distribution of stars evolves directly from the
primordial spatial distribution of high density material.Comment: Accepted for Publication in The Astrophysical Journal, 10/10. 49
pages, 16 figure
Filamentary structure of star-forming complexes
The nearest young stellar groups are associated with "hubs" of column density
exceeding 10^22 cm^-2, according to recent observations. These hubs radiate
multiple "filaments" of parsec length, having lower column density and fewer
stars. Systems with many filaments tend to have parallel filaments with similar
spacing. Such "hub-filament structure" is associated with all of the nine young
stellar groups within 300 pc, forming low-mass stars. Similar properties are
seen in infrared dark clouds forming more massive stars. In a new model, an
initial clump in a uniform medium is compressed into a self-gravitating,
modulated layer. The outer layer resembles the modulated equilibrium of
Schmid-Burgk (1967) with nearly parallel filaments. The filaments converge onto
the compressed clump, which collapses to form stars with high efficiency. The
initial medium and condensations have densities similar to those in nearby
star-forming clouds and clumps. The predicted structures resemble observed
hub-filament systems in their size, shape, and column density, and in the
appearance of their filaments. These results suggest that hub-filament
structure associated with young stellar groups may arise from compression of
clumpy gas in molecular clouds.Comment: accepted by ApJ, to appear August 10, 200
Galaxy Zoo and ALFALFA: Atomic Gas and the Regulation of Star Formation in Barred Disc Galaxies
We study the observed correlation between atomic gas content and the
likelihood of hosting a large scale bar in a sample of 2090 disc galaxies. Such
a test has never been done before on this scale. We use data on morphologies
from the Galaxy Zoo project and information on the galaxies' HI content from
the ALFALFA blind HI survey. Our main result is that the bar fraction is
significantly lower among gas rich disc galaxies than gas poor ones. This is
not explained by known trends for more massive (stellar) and redder disc
galaxies to host more bars and have lower gas fractions: we still see at fixed
stellar mass a residual correlation between gas content and bar fraction. We
discuss three possible causal explanations: (1) bars in disc galaxies cause
atomic gas to be used up more quickly, (2) increasing the atomic gas content in
a disc galaxy inhibits bar formation, and (3) bar fraction and gas content are
both driven by correlation with environmental effects (e.g. tidal triggering of
bars, combined with strangulation removing gas). All three explanations are
consistent with the observed correlations. In addition our observations suggest
bars may reduce or halt star formation in the outer parts of discs by holding
back the infall of external gas beyond bar co-rotation, reddening the global
colours of barred disc galaxies. This suggests that secular evolution driven by
the exchange of angular momentum between stars in the bar, and gas in the disc,
acts as a feedback mechanism to regulate star formation in intermediate mass
disc galaxies.Comment: 16 pages, 10 figures. In press at MNRAS. v2 contains corrections
found in proof
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