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Mostrando ítems 11-20 de 35
Solar motion and discharge of Paraná River, South America: Evidence for a link
(American Geophysical Union, 2011-10)
A link between climate and the motion of the Sun around the barycenter of the solar system has been suggested, mostly on the basis of interannual cycles observed in climatological data from the Northern Hemisphere. This ...
Régua, compasso e pontos notáveis de um triângulo
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM MATEMÁTICA - REDE NACIONAL, 2020-03-26)
The Technology advances has generated several resources that are helping the teaching
of various topics in elementary Mathematics, especially those involving geometry in the
plane, such as GeoGebra, WinPlot, Graph, among ...
MODELING AND ANALYSIS OF A BALL AND BEAM SYSTEM INCLUDING IMPACTS AND DRY FRICTION
(Amer Soc Mechanical Engineers, 2014-01-01)
The Ball and Beam system is a common didactical plant that presents a complex nonlinear dynamics. This comes from the fact that the ball rolls over the beam, which rotates around its barycenter. In order to deduce the ...
An eclipsing binary distance determination to the large magellanic cloud.
(Universidad de Concepción.Facultad de Ciencias Físicas y MatemáticasDepartamento de Astronomía., 2016)
We present analysis of a new, detached eclipsing binary OGLE-LMC-ECL-25658 in the Large Magellanic Cloud. The system consists of two late G-type giant stars on eccentric orbit and orbital period of ∼ 200 days. The system ...
Peering into the Dark Side: Magnesium Lines Establish a Massive Neutron Star in PSR J2215+5135
New millisecond pulsars (MSPs) in compact binaries provide a good opportunity to search for the most massive neutron stars. Their main-sequence companion stars are often strongly irradiated by the pulsar, displacing the ...
3D Imaging of the OH mesospheric emissive layer
(Elsevier, 2010-01-15)
A new and original stereo imaging method is introduced to measure the altitude of the OH nightglow layer and provide a 3D perspective map of the altitude of the layer centroid. Near-IR photographs of the OH layer are taken ...
Stereoscopic imaging of the hydroxyl emissive layer at low latitudes
(Elsevier, 2008-05-04)
The hydroxyl nightglow layer is an excellent tracer of the dynamical processes occurring within the mesosphere. A new stereo-imaging method is applied that not only measures the altitude of the airglow layer but also ...