856 research outputs found
Loss and the Experience of Emotional Distress in Childhood
The objective of this study was to investigate loss and the experience of emotional distress through a series of three studies. In Study 1, results indicated that when controlling for the total number of traumas experienced, children with loss traumas did not differ significantly from children with other types of traumas in terms of the level of PTSD symptoms reported and diurnal cortisol levels. In Study 2, results indicated that youth with loss traumas had significantly higher parent-reported internalizing and externalizing symptoms than control participants. In Study 3, we replicated and extended findings from Study 1 using an independent sample of non-clinic-referred youth. Findings are discussed in terms of how loss events may constitute a traumatic stressor in youth
The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III
The Sloan Digital Sky Survey (SDSS) started a new phase in August 2008, with
new instrumentation and new surveys focused on Galactic structure and chemical
evolution, measurements of the baryon oscillation feature in the clustering of
galaxies and the quasar Ly alpha forest, and a radial velocity search for
planets around ~8000 stars. This paper describes the first data release of
SDSS-III (and the eighth counting from the beginning of the SDSS). The release
includes five-band imaging of roughly 5200 deg^2 in the Southern Galactic Cap,
bringing the total footprint of the SDSS imaging to 14,555 deg^2, or over a
third of the Celestial Sphere. All the imaging data have been reprocessed with
an improved sky-subtraction algorithm and a final, self-consistent photometric
recalibration and flat-field determination. This release also includes all data
from the second phase of the Sloan Extension for Galactic Understanding and
Evolution (SEGUE-2), consisting of spectroscopy of approximately 118,000 stars
at both high and low Galactic latitudes. All the more than half a million
stellar spectra obtained with the SDSS spectrograph have been reprocessed
through an improved stellar parameters pipeline, which has better determination
of metallicity for high metallicity stars.Comment: Astrophysical Journal Supplements, in press (minor updates from
submitted version
The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic
data from the Baryon Oscillation Spectroscopic Survey (BOSS). This ninth data
release (DR9) of the SDSS project includes 535,995 new galaxy spectra (median
z=0.52), 102,100 new quasar spectra (median z=2.32), and 90,897 new stellar
spectra, along with the data presented in previous data releases. These spectra
were obtained with the new BOSS spectrograph and were taken between 2009
December and 2011 July. In addition, the stellar parameters pipeline, which
determines radial velocities, surface temperatures, surface gravities, and
metallicities of stars, has been updated and refined with improvements in
temperature estimates for stars with T_eff<5000 K and in metallicity estimates
for stars with [Fe/H]>-0.5. DR9 includes new stellar parameters for all stars
presented in DR8, including stars from SDSS-I and II, as well as those observed
as part of the SDSS-III Sloan Extension for Galactic Understanding and
Exploration-2 (SEGUE-2).
The astrometry error introduced in the DR8 imaging catalogs has been
corrected in the DR9 data products. The next data release for SDSS-III will be
in Summer 2013, which will present the first data from the Apache Point
Observatory Galactic Evolution Experiment (APOGEE) along with another year of
data from BOSS, followed by the final SDSS-III data release in December 2014.Comment: 9 figures; 2 tables. Submitted to ApJS. DR9 is available at
http://www.sdss3.org/dr
The Baryon Oscillation Spectroscopic Survey of SDSS-III
The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure the
scale of baryon acoustic oscillations (BAO) in the clustering of matter over a
larger volume than the combined efforts of all previous spectroscopic surveys
of large scale structure. BOSS uses 1.5 million luminous galaxies as faint as
i=19.9 over 10,000 square degrees to measure BAO to redshifts z<0.7.
Observations of neutral hydrogen in the Lyman alpha forest in more than 150,000
quasar spectra (g<22) will constrain BAO over the redshift range 2.15<z<3.5.
Early results from BOSS include the first detection of the large-scale
three-dimensional clustering of the Lyman alpha forest and a strong detection
from the Data Release 9 data set of the BAO in the clustering of massive
galaxies at an effective redshift z = 0.57. We project that BOSS will yield
measurements of the angular diameter distance D_A to an accuracy of 1.0% at
redshifts z=0.3 and z=0.57 and measurements of H(z) to 1.8% and 1.7% at the
same redshifts. Forecasts for Lyman alpha forest constraints predict a
measurement of an overall dilation factor that scales the highly degenerate
D_A(z) and H^{-1}(z) parameters to an accuracy of 1.9% at z~2.5 when the survey
is complete. Here, we provide an overview of the selection of spectroscopic
targets, planning of observations, and analysis of data and data quality of
BOSS.Comment: 49 pages, 16 figures, accepted by A
Relato de experiência da produção de EPIs por alunos de curso de graduação em saúde no estado de Roraima
Introduction: The COVID-19 pandemic is considered a public health problem, as it is a respiratory virus with high speed of dissemination, without proven effective drug intervention. In the global context, this characteristic led to a financial and assistance collapse in the capacity of health systems, due to the increase in prolonged hospitalizations. In order to protect professionals in contact with the Coronavirus, the Brazilian Society of Infectious Diseases recommends the use of PPE. Objective: Given this scenario, the present report aims to demonstrate the feasibility of making low-cost handmade PPE, in an attempt to minimize the impacts on the Unified Health System (SUS). Methods: For this, an open online search of the various experiences of artisanal production of PPE was carried out with subsequent selection and adaptation of the model. Results: The prototypes had a significantly lower cost than the current market prices, in addition to having proven efficiency in tests. Conclusion: The production should not replace the N95, but save masks and face shields for professionals working on the front line against the COVID-19.Introdução: A pandemia do COVID-19 é considerada um problema de saúde pública, uma vez que é um vírus respiratório com alta velocidade de disseminação, sem intervenção medicamentosa eficaz comprovada. No contexto mundial, essa característica propiciou um colapso financeiro e assistencial da capacidade dos sistemas de saúde, devido ao aumento de internações hospitalares prolongadas. A fim de proteger os profissionais em contato com o Coronavírus, a Sociedade Brasileira de Infectologia recomenda a utilização de EPIs. Objetivo: Diante desse cenário, o presente relato objetiva demonstrar a viabilidade da confecção de EPIs artesanais de baixo custo, como tentativa de minimizar os impactos no Sistema Único de Saúde (SUS). Métodos: Para isso, foi realizada uma pesquisa aberta online das diversas experiências de produções artesanais de EPIs com posterior seleção e adaptação do modelo. Resultados: Os protótipos tiveram custo significativamente menor que os preços atuais do mercado, além apresentarem eficiência comprovada em testes. Conclusão: A produção não deve substituir a N95, mas poupar máscaras e protetores faciais para os profissionais atuantes na linha de frente contra o COVID-19
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