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Estudo espectroscópico da atividade cromosférica em estrelas do tipo solar: a busca por caracterizar estrelas análogas em mínimo de Maunder
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA, 2021-06-11)
Since the first observations of sunspots made by Thomas Harriot and subsequently by
Galileo and several other scientists, astronomers looked for methods to better understand
the magnetic phenomena in the Sun and in solar-type ...
Magnetismo ambiental en suelos vírgenes y antropizados
(Universidad Nacional Autónoma de México, 2018)
El objetivo de la presente contribución es brindar, en forma resumida, el estado de avance de los estudios de magnetismo ambiental en suelos vírgenes y antropizados en el pasado reciente y en la actualidad. El análisis del ...
The magnetosphere as a complex system
(2013)
The magnetosphere is a multi-scale spatio-temporal complex dynamical system. In this context, we have analyzed the multifractal behavior of the AL index, as a proxy for an energy dissipation rate, using discrete wavelet ...
Limnological response from high‑altitude wetlands to the water supply in the Andean Altiplano
(Nature, 2021)
The Andean Altiplano-Puna is located at an elevation of approximately 4000 m.a.s.l. and is delineated by the Western and the Eastern Andes Cordillera. The high-altitude wetlands (HAWs) in the Central Andes are unique ...
Two-Electron-Spin Ratchets as a Platform for Microwave-Free Dynamic Nuclear Polarization of Arbitrary Material Targets
(American Chemical Society, 2019-04-18)
Optically pumped color centers in semiconductor powders can potentially induce high levels of nuclear spin polarization in surrounding solids or fluids at or near ambient conditions, but complications stemming from the ...
Conflicting structural and geochronological data from the Ibituruna quartz-syenite (SE Brazil): Effect of protracted ""hot"" orogeny and slow cooling rate?
(ELSEVIER SCIENCE BV, 2009)
The Ibituruna quartz-syenite was emplaced as a sill in the Ribeira-Aracuai Neoproterozoic belt (Southeastern Brazil) during the last stages of the Gondwana supercontinent amalgamation. We have measured the Anisotropy of ...
Top quark anomalous tensor couplings in the two-Higgs-doublet models
(Springer, 2013)
We compute the one loop right and left anomalous tensor couplings (g R and g L , respectively) for the top quark, in the aligned two-Higgs-doublet model. They are the magnetic-like couplings in the most general parameterization ...
Geomorfologia e geologia do quaternário da planície flúvio-eólica do Médio rio São francisco, NE do brasil
(Universidade Estadual Paulista (Unesp), 2020-05-06)
Compreender a evolução paleoclimática do Quaternário na região Nordeste do Brasil (NEB) é parte fundamental para entender como tem funcionado a circulação atmosférica na faixa tropical da América do Sul. Nesse contexto, o ...
Paleolimnological reconstruction of the centennial eutrophication processes in a sub-tropical South American reservoir
(Pergamon-Elsevier Science Ltd, 2020-11)
Reservoirs hold a detailed record of the changes in the input of sediments and nutrients over decades to centuries. Paleolimnological multi-proxy analysis makes it possible to reconstruct baseline conditions to infer early ...
Palaeoenvironmental changes during the last 1600 years inferred from the sediment record of a cirque lake in southern Patagonia (Laguna Las Vizcachas, Argentina)
(Elsevier Science, 2009-10)
Laguna Las Vizcachas is a cirque lake located at the margin of an extra-Andean volcanic plateau in southern Patagonia, Argentina, within the area of steppe and semi-desert east of the Andes. The number of paleoenvironmental ...