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Experiments with a liquid metal alloy, galinstan, are reported and show clear evidence of Alfvén wave propagation as well as resonance of Alfvén modes. Galinstan is liquid at room temperature, and although its electrical conductivity is not as large as that of liquid sodium or NaK, it has still been possible to study Alfvén waves, thanks to the use of(More)
OBJECTIVE To present the conceptual foundations that explain how events occurring during intrauterine life may influence body development, emphasizing the interrelation between low birth weight and risk of obesity throughout life. DATA SOURCES Google Scholar, Library Scientific Electronic Online (SciELO), EBSCO, Scopus, and PubMed were the databases.(More)
A novel approximation technique using Lagrange finite elements is proposed to solve magneto-dynamics problems involving discontinuous magnetic permeability and non-smooth interfaces. The algorithm is validated on benchmark problems and is used for kinematic studies of the Cadarache von Kármán Sodium 2 (VKS2) experimental fluid dynamo. 2011 Elsevier Inc. All(More)
This study evaluated the capabilities of a LiDAR-based system to characterize poplar trees for biomass production. The precision of the system was assessed by analyzing the relationship between the distance records and biophysical parameters. The terrestrial laser scanner (TLS) system consisted of a 2D time-of-flight LiDAR sensor, a gimbal to dynamically(More)
Planets and stars are often capable of generating their own magnetic fields. This occurs through dynamo processes occurring via turbulent convective stirring of their respective molten metal-rich cores and plasma-based convection zones. Present-day numerical models of planetary and stellar dynamo action are not carried out using fluids properties that mimic(More)
OBJECTIVE To analyze the risk factors associated with neonatal deaths among children with low birth weight. METHODS A cohort study was carried out on live births weighing between 500 g and 2,499 g from single pregnancies without anencephaly in Recife (Northeastern Brazil) between 2001 and 2003. Data on 5,687 live births and 499 neonatal deaths obtained(More)
The ability to manage weed infestations in a spatially precise manner will rely on the availability of efficient methods of mapping weed distributions. We have conducted a study designed to compare four different ground based methods for collecting georeferenced information on sterile wild oat infestation in a winter barley crop. Sampling was done at(More)
s identified in the databases (SciELO=75; Google scholar=9; EBSCO =312; pubMed=112; Scopus=30 (n=538) Full articles assessed for eligibility (n=208) Excluded abstracts n=10 for duplicity n=189 for subject n=30 for language n=69 lack of access to full-text n=22 book reviews n=10 editorials Full articles excluded n=118 restricted to intrauterine development(More)
New technologies, such as Differential Global Positioning Systems (DGPS) and Geographic Information Systems (GIS), may be useful in order to create models to predict the spatio-temporal behaviour of weeds. The aim of this study was to generate a geometric model able to predict the patch expansion of S. halepense, a problematic perennial weed in maize crops(More)