2,711 research outputs found
Fear for manufacturing? China and the future of industry in Brazil and Latin America
There has been considerable concern in Latin America over the implications of increased competition from China for local industry. These concerns include the possibility of "deindustrialization," the increased "primarization" of the region's exports and the difficulties of upgrading manufactured exports into higher technology products. This article examines the impact of Chinese competition both in the domestic market and in export markets on Brazilian industry. It documents the increased penetration of Chinese manufactures in the Brazilian market and the way in which Brazilian exports have lost market share to China in the US, European Union and four Latin American countries. Brazil, because of its more developed and locally integrated industrial sector, is not typical of other Latin American countries and the article also discusses the relevance of the Brazilian experience for the region as a whole
Resonance Contributions to the Electromagnetic Low Energy Constants of Chiral Perturbation Theory
The effective chiral Lagrangian of the strong and electromagnetic
interactions of the pseudoscalar mesons at low energies depends on a set of low
energy constants. We determine the contributions to the electromagnetic
coupling constants at order , which arise from resonances within a
photon loop. We give some implications of our results, in particular we discuss
in detail the effects on the corrections to Dashen's theorem.Comment: LaTex (uses epsfig.sty), 35 pages including 3 Postscript figures. The
complete paper is also available via anonymous ftp at
ftp://www-ttp.physik.uni-karlsruhe.de/ , or via www at
http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/preprints/ ; slightly enlarged
version. Accepted for publication in Nucl. Phys.
Unified description of long-time tails and long-range correlation functions for sheared granular liquids
Unified description on the long-time tail of velocity autocorrelation
function and the long-range correlation for the equal-time spatial correlation
functions is developed based on the generalized fluctuating hydrodynamics. The
cross-over of the long-time tail from to is predicted
independent of the density, and the equal-time spatial density correlation
function and the equal-time spatial velocity correlation function respectively
satisfy and for large limit.Comment: 10 pages. to be published in Euro. Phys. J.
10 simple rules to create a serious game, illustrated with examples from structural biology
Serious scientific games are games whose purpose is not only fun. In the
field of science, the serious goals include crucial activities for scientists:
outreach, teaching and research. The number of serious games is increasing
rapidly, in particular citizen science games, games that allow people to
produce and/or analyze scientific data. Interestingly, it is possible to build
a set of rules providing a guideline to create or improve serious games. We
present arguments gathered from our own experience ( Phylo , DocMolecules ,
HiRE-RNA contest and Pangu) as well as examples from the growing literature on
scientific serious games
Recommended from our members
The Psychiatrization of Poverty: Rethinking the Mental Health-Poverty Nexus
The positive association between ‘mental illness’ and poverty is one of the most well established in psychiatric epidemiology. Yet, there is little conclusive evidence about the nature of this relationship. Generally, explanations revolve around the idea of a vicious cycle, where poverty may cause mental ill health, and mental ill health may lead to poverty. Problematically, much of the literature overlooks the historical, social, political, and cultural trajectories of constructions of both poverty and ‘mental illness’. Laudable attempts to explore the social determinants of mental health sometimes take recourse to using and reifying psychiatric diagnostic categories that individualize distress and work to psychiatrically reconfigure ‘symptoms’ of oppression, poverty, and inequality as ‘symptoms’ of ‘mental illness’. This raises the paradoxical issue that the very tools that are used to research the relationship between poverty and mental health may prevent recognition of the complexity of that relationship. Looking at the mental health–poverty nexus through a lens of psychiatrization (intersecting with medicalization, pathologization, and psychologization), this paper recognizes the need for radically different tools to trace the messiness of the multiple relationships between poverty and distress. It also implies radically different interventions into mental health and poverty that recognize the landscapes in which lived realities of poverty are embedded, the political economy of psychiatric diagnostic and prescribing practices, and ultimately to address the systemic causes of poverty and inequality
Electronic stress tensor analysis of molecules in gas phase of CVD process for GeSbTe alloy
We analyze the electronic structure of molecules which may exist in gas phase
of chemical vapor deposition process for GeSbTe alloy using the electronic
stress tensor, with special focus on the chemical bonds between Ge, Sb and Te
atoms. We find that, from the viewpoint of the electronic stress tensor, they
have intermediate properties between alkali metals and hydrocarbon molecules.
We also study the correlation between the bond order which is defined based on
the electronic stress tensor, and energy-related quantities. We find that the
correlation with the bond dissociation energy is not so strong while one with
the force constant is very strong. We interpret these results in terms of the
energy density on the "Lagrange surface", which is considered to define the
boundary surface of atoms in a molecule in the framework of the electronic
stress tensor analysis.Comment: 32 pages, 9 figure
Control of hyperglycaemia in paediatric intensive care (CHiP): study protocol.
BACKGROUND: There is increasing evidence that tight blood glucose (BG) control improves outcomes in critically ill adults. Children show similar hyperglycaemic responses to surgery or critical illness. However it is not known whether tight control will benefit children given maturational differences and different disease spectrum. METHODS/DESIGN: The study is an randomised open trial with two parallel groups to assess whether, for children undergoing intensive care in the UK aged <or= 16 years who are ventilated, have an arterial line in-situ and are receiving vasoactive support following injury, major surgery or in association with critical illness in whom it is anticipated such treatment will be required to continue for at least 12 hours, tight control will increase the numbers of days alive and free of mechanical ventilation at 30 days, and lead to improvement in a range of complications associated with intensive care treatment and be cost effective. Children in the tight control group will receive insulin by intravenous infusion titrated to maintain BG between 4 and 7.0 mmol/l. Children in the control group will be treated according to a standard current approach to BG management. Children will be followed up to determine vital status and healthcare resources usage between discharge and 12 months post-randomisation. Information regarding overall health status, global neurological outcome, attention and behavioural status will be sought from a subgroup with traumatic brain injury (TBI). A difference of 2 days in the number of ventilator-free days within the first 30 days post-randomisation is considered clinically important. Conservatively assuming a standard deviation of a week across both trial arms, a type I error of 1% (2-sided test), and allowing for non-compliance, a total sample size of 1000 patients would have 90% power to detect this difference. To detect effect differences between cardiac and non-cardiac patients, a target sample size of 1500 is required. An economic evaluation will assess whether the costs of achieving tight BG control are justified by subsequent reductions in hospitalisation costs. DISCUSSION: The relevance of tight glycaemic control in this population needs to be assessed formally before being accepted into standard practice
Probing the neutrino mass hierarchy with CMB weak lensing
We forecast constraints on cosmological parameters with primary CMB
anisotropy information and weak lensing reconstruction with a future
post-Planck CMB experiment, the Cosmic Origins Explorer (COrE), using
oscillation data on the neutrino mass splittings as prior information. Our MCMC
simulations in flat models with a non-evolving equation-of-state of dark energy
w give typical 68% upper bounds on the total neutrino mass of 0.136 eV and
0.098 eV for the inverted and normal hierarchies respectively, assuming the
total summed mass is close to the minimum allowed by the oscillation data for
the respective hierarchies (0.10 eV and 0.06 eV). Including information from
future baryon acoustic oscillation measurements with the complete BOSS, Type 1a
supernovae distance moduli from WFIRST, and a realistic prior on the Hubble
constant, these upper limits shrink to 0.118 eV and 0.080 eV for the inverted
and normal hierarchies, respectively. Addition of these distance priors also
yields percent-level constraints on w. We find tension between our MCMC results
and the results of a Fisher matrix analysis, most likely due to a strong
geometric degeneracy between the total neutrino mass, the Hubble constant, and
w in the unlensed CMB power spectra. If the minimal-mass, normal hierarchy were
realised in nature, the inverted hierarchy should be disfavoured by the full
data combination at typically greater than the 2-sigma level. For the
minimal-mass inverted hierarchy, we compute the Bayes' factor between the two
hierarchies for various combinations of our forecast datasets, and find that
the future probes considered here should be able to provide `strong' evidence
(odds ratio 12:1) for the inverted hierarchy. Finally, we consider potential
biases of the other cosmological parameters from assuming the wrong hierarchy
and find that all biases on the parameters are below their 1-sigma marginalised
errors.Comment: 16 pages, 13 figures; minor changes to match the published version,
references adde
Gas Physics, Disk Fragmentation, and Bulge Formation in Young Galaxies
We investigate the evolution of star-forming gas-rich disks, using a 3D
chemodynamical model including a dark halo, stars, and a two-phase interstellar
medium with feedback processes from the stars. We show that galaxy evolution
proceeds along very different routes depending on whether it is the gas disk or
the stellar disk which first becomes unstable, as measured by the respective
Q-parameters. This in turn depends on the uncertain efficiency of energy
dissipation of the cold cloud component from which stars form. When the cold
gas cools efficiently and drives the instability, the galactic disk fragments
and forms a number of massive clumps of stars and gas. The clumps spiral to the
center of the galaxy in a few dynamical times and merge there to form a central
bulge component in a strong starburst. When the kinetic energy of the cold
clouds is dissipated at a lower rate, stars form from the gas in a more
quiescent mode, and an instability only sets in at later times, when the
surface density of the stellar disk has grown sufficiently high. The system
then forms a stellar bar, which channels gas into the center, evolves, and
forms a bulge whose stars are the result of a more extended star formation
history. We investigate the stability of the gas-stellar disks in both regimes,
as well as the star formation rates and element enrichment. We study the
morphology of the evolving disks, calculating spatially resolved colours from
the distribution of stars in age and metallicity, including dust absorption. We
then discuss morphological observations such as clumpy structures and chain
galaxies at high redshift as possible signatures of fragmenting, gas-rich
disks. Finally, we investigate abundance ratio distributions as a means to
distinguish the different scenarios for bulge formation.Comment: 16 pages, Latex, 14 figures, to appear in Astronomy and Astrophysics,
Version with high quality images available at
http://www.astro.unibas.ch/leute/ai.shtm
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