1,461 research outputs found
The Classic: Functional Results of Hip Arthroplasty with Acrylic Prosthesis
This Classic article is a reprint of the original work by R. Merle dâAubignĂ© and M. Postel, Functional Results of Hip Arthroplasty with Acrylic Prosthesis. An accompanying biographical sketch on R. Merle dâAubignĂ©, MD, is available at DOI 10.1007/s11999-008-0571-2. The Classic Article is ©1954 by the Journal of Bone and Joint Surgery, Inc. and is reprinted with permission from Merle dâAubignĂ© R, Postel M. Functional results of hip arthroplasty with acrylic prosthesis. J Bone Joint Surg Am. 1954;35:451--475
Long Run Health Impacts of Income Shocks: Wine and Phylloxera in 19th Century France
This paper provides estimates of the long-term effects on height and health of a large income shock experienced in early childhood. Phylloxera, an insect that attacks the roots of grape vines, destroyed 40% of French vineyards between 1863 and 1890, causing major income losses among wine growing families. Because the insects spread slowly from the southern coast of France to the rest of the country, Phylloxera affected different regions in different years. We exploit the regional variation in the timing of this shock to identify its effects. We examine the effects on the adult height, health, and life expectancy of children born in the years and regions affected by the Phylloxera. The shock decreased long run height, but it did not affect other dimensions of health, including life expectancy. We find that, at age 20, those born in affected regions were about 1.8 millimeters shorter than others. This estimate implies that children of wine-growing families born when the vines were affected in their regions were 0.6 to 0.9 centimeters shorter than others by age 20. This is a significant effect since average heights grew by only 2 centimeters in the entire 19th century. However, we find no other effect on health, including infant mortality, life expectancy, and morbidity by age 20.
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Regional Invasive Species & Climate Change Management Challenge: Prioritizing range-shifting invasive plants High-impact species coming to the Northeast
Prevention of new invasions is a cost-effective way to manage invasive species and is most effective when emerging invaders are identified and prioritized before they arrive. Climate change is projected to bring nearly 100 new invasive plants to the Northeast. However, these plants are likely to have different types of impacts, making some a higher concern than others. Here, we summarize the results of original RISCC research that identifies high priority, range-shifting invasive plants based on their potential impacts
Infrared and sub-mm observations of outbursting young stars with Herschel and Spitzer
Episodic accretion plays an important role in the evolution of young stars.
Although it has been under investigation for a long time, the origin of such
episodic accretion events is not yet understood. We investigate the dust and
gas emission of a sample of young outbursting sources in the infrared to get a
better understanding of their properties and circumstellar material, and we use
the results in a further work to model the objects. We used Herschel data, from
our PI program of 12 objects and complemented with archival observations to
obtain the spectral energy distributions (SEDs) and spectra of our targets. We
report here the main characteristics of our sample, focussing on the SED
properties and on the gas emission lines detected in the PACS and SPIRE
spectra. The SEDs of our sample show the diversity of the outbursting sources,
with several targets showing strong emission in the far-infrared from the
embedded objects. Most of our targets reside in a complex environment, which we
discuss in detail. We detected several atomic and molecular lines, in
particular rotational CO emission from several transitions from J=38-37 to
J=4-3. We constructed rotational diagrams for the CO lines, and derived in
three domains of assumed local thermodynamic equilibrium (LTE) temperatures and
column densities, ranging mainly between 0-100 K and 400-500K. We confirm
correlation in our sample between intense CO emission and the column
density of the warm domain of CO, N(warm). We notice a strong increase in
luminosity of HH 381 IRS and a weaker increase for PP 13 S, which shows the
beginning of an outburst.Comment: 23 pages, 17 figures, A&A accepte
Private drinking locations as an environmental risk factor for hazardous adolescent alcohol use
An Augmented OxRAM Synapse for Spiking Neural Network (SNN) Circuits
International audienceIn this paper, the conductance modulation of OxRAM memristive devices is evaluated based on experimental data to reveal the memristor inherent analog synaptic behavior. Simulation results are presented to validate the use of OxRAMs as synapses at a circuit level in a spiking neural network context. In the proposed approach, the OxRAM synapse is augmented with a shift register associated with current compliance control transistors to provide an efficient monitoring of the OxRAM conductance
River Restoration in the Twenty-First Century: Data and Experiential Knowledge to Inform Future Efforts
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/71999/1/j.1526-100X.2007.00243.x.pd
Science with an ngVLA: Resolving the Radio Complexity of EXor and FUor-type Systems with the ngVLA
Episodic accretion may be a common occurrence in the evolution of young
pre-main sequence stars and has important implications for our understanding of
star and planet formation. Many fundamental aspects of what drives the
accretion physics, however, are still unknown. The ngVLA will be a key tool in
understanding the nature of these events. The high spatial resolution, broad
spectral coverage, and unprecedented sensitivity will allow for the detailed
analysis of outburst systems. The proposed frequency range of the ngVLA allows
for observations of the gas, dust, and non-thermal emission from the star and
disk.Comment: 8 pages, 1 figure, To be published in the ASP Monograph Series,
"Science with a Next-Generation VLA", ed. E. J. Murphy (ASP, San Francisco,
CA
Stellar models and isochrones from low-mass to massive stars including pre-main sequence phase with accretion
Grids of stellar models are useful tools to derive the properties of stellar
clusters, in particular young clusters hosting massive stars, and to provide
information on the star formation process in various mass ranges. Because of
their short evolutionary timescale, massive stars end their life while their
low-mass siblings are still on the pre-main sequence (pre-MS) phase. Thus the
study of young clusters requires consistent consideration of all the phases of
stellar evolution. But despite the large number of grids that are available in
the literature, a grid accounting for the evolution from the pre-MS accretion
phase to the post-MS phase in the whole stellar mass range is still lacking. We
build a grid of stellar models at solar metallicity with masses from 0.8
to 120 , including pre-MS phase with accretion. We use the
{\sc genec} code to run stellar models on this mass range. The accretion law is
chosen to match the observations of pre-MS objects on the Hertzsprung-Russell
diagram. We describe the evolutionary tracks and isochrones of our models. The
grid is connected to previous MS and post-MS grids computed with the same
numerical method and physical assumptions, which provides the widest grid in
mass and age to date. Numerical tables of our models and corresponding
isochrones are available online
Web-based intensive therapeutic contact for eating disorders
Contains fulltext :
121984.pdf (publisher's version ) (Open Access)Although many people suffer from eating disorders, which have high mortality and severe morbidity, only a small number of affected people in the Netherlands are treated by mental health professionals. Eating disorders are often not recognized. Many patients do not ask for help because of shame, a lack of awareness, or denial of the disorder. Even when the disorder is recognized, it is difficult to motivate patients to seek help. As a result, many patients are in urgent need of help.1 p
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