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Ground-state energy of a classical artificial molecule
(SPRINGER, 2008)
We study the ground-state energy of a classical artificial molecule formed by two-dimensional clusters (artificial atoms) of N/2 charged particles separated by a distance d. For the small molecules of N = 2 and 4, we obtain ...
Ground nesting birds in roadside borders of the Argentine Pampas: habitat use and predation risk of artificial nests
(Sociedade Brasileira de Ornitologia, 2019-12)
Habitat loss and fragmentation have led to grassland bird declines, with ground nesters particularly vulnerable. Roadsides could provide habitat, although their suitability depends on several roadside and field characteristics. ...
Decrease in snow cover over the Aysen river catchment in Patagonia, Chile
(MDPI, 2018-05)
The evidence for global warming can be seen in various forms, such as glacier shrinkage, sea ice retreat, sea level rise and air temperature increases. The magnitude of these changes tends to be critical over pristine and ...
Simultaneous ground-based and in situ Swarm observations of equatorial F-region irregularities over Jicamarca
(European Geosciences Union, 2020-10-16)
Ionospheric irregularities are a common phenomenon in the low-latitude ionosphere. They can be seen in situ as depletions of plasma density, radar plasma plumes, or ionogram spread F by ionosondes. In this paper, we compared ...
Cerrado ground-dwelling ants (Hymenoptera: Formicidae) as indicators of edge effects
(Sociedade Brasileira de Zoologia, 2011)
Large-scale agricultural production in Brazil preferentially occupies plateaus reclaimed from areas originally covered by Cerrado (savanna). Depending on the region, a percentage of the pristine vegetation coverage must ...
Supressão de plantas daninhas utilizando plantas de cobertura do solo
(Univ Federal Vicosa, 2014-10-01)
This study aimed to evaluate soil cover and the suppressive effect on weeds by different cover crops at different seed densities. The experiments were set up in Votuporanga, state of Sao Paulo, Brazil and in Selviria, state ...
Comparison of regolith physical and chemical characteristics with geophysical data along a climate and ecological gradient, Chilean Coastal Cordillera (26 to 38 degrees S)
(Copernicus Gesellschaft MBH, 2020)
We combine geophysical observations from ground-penetrating radar (GPR) with regolith physical and chemical properties from pedons excavated in four study areas spanning 1300 km of the climate and ecological gradient in ...