776 research outputs found
Constraining Variations in the Fine Structure Constant in the presence of Early Dark Energy
We discuss present and future cosmological constraints on variations of the
fine structure constant induced by an early dark energy component
having the simplest allowed (linear) coupling to electromagnetism. We find that
current cosmological data show no variation of the fine structure constant at
recombination respect to the present-day value, with / =
0.975 \pm 0.020 at 95 % c.l., constraining the energy density in early dark
energy to < 0.060 at 95 % c.l.. Moreover, we consider constraints on
the parameter quantifying the strength of the coupling by the scalar field. We
find that current cosmological constraints on the coupling are about 20 times
weaker than those obtainable locally (which come from Equivalence Principle
tests). However forthcoming or future missions, such as Planck Surveyor and
CMBPol, can match and possibly even surpass the sensitivity of current local
tests.Comment: 5 pages, 3 figure
Estudo da cadeia produtiva do processamento mecanico da madeira para prospeccao de demandas tecnologicas - analise das subcadeias das madeiras serrada e compensada no Estado do Paraná.
High risk of cardiovascular episodes and low adherence to risk factors guidelines in a population with diabetes
Although recent guidelines cover therapeutic goals, effective lipid management of patients with type 1 and type 2 diabetes to reduce cardiovascular disease (CVD) risk is still largely
unattained. In the present study, we explored the electronic health records (EHR) at a specialized diabetes outpatient clinic to assess, in a real world database, the prevalence of poor lipid management in people with diabetes, the associated characteristics of this population, and the patterns of medication.Amge
A characterisation of Alfvenic instabilities and use in the reconstruction of current density profiles at ASDEX Upgrade
Non-isothermal model for the direct isotropic/smectic-A liquid crystalline transition
An extension to a high-order model for the direct isotropic/smectic-A liquid
crystalline phase transition was derived to take into account thermal effects
including anisotropic thermal diffusion and latent heat of phase-ordering.
Multi-scale multi-transport simulations of the non-isothermal model were
compared to isothermal simulation, showing that the presented model extension
corrects the standard Landau-de Gennes prediction from constant growth to
diffusion-limited growth, under shallow quench/undercooling conditions.
Non-isothermal simulations, where meta-stable nematic pre-ordering precedes
smectic-A growth, were also conducted and novel non-monotonic
phase-transformation kinetics observed.Comment: First revision: 20 pages, 7 figure
Industry/University collaboration in product focussed Ĺ“nological research in Portugal - the SOGRAPE / UCP ESB partnership 1995 - 1998
A innovative model of collaboration between a wine company and a university research
group is presented. A protocol was established as a response to the perceived need to, on the part of the university, (i) focus research on specific scientific bottlenecks which would have a real impact in the producing industry and, on the part of the company, (ii) to have access to
the scientific capacity to conduct in-depth studies to approach specific technical challenges. A closely managed programme was jointly established and the major characteristics are presented here together with the main results obtained during the first 2 and a half years of operation
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