منابع مشابه
Polar wind outflow model: Saturn results
[1] The Saturnian system’s configuration and dynamics are to a large extent controlled by the planet’s rapid rotation and the plasma in the magnetosphere. Therefore characterizing the relative importance of the various plasma sources is crucial to understanding Saturn’s magnetosphere. Most research in this area focuses on the addition of mass from the icy satellites, the rings, and Titan, while...
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A new target design concept is proposed for direct-drive implosions while the National Ignition Facility is in its initial, indirect-drive configuration. It differs from earlier "polar-direct-drive" designs by adding a low-Z ring around the capsule equator. Refraction in the plasma formed around this ring permits time-dependent tuning of the capsule drive uniformity. An optimized simulation sho...
متن کاملHorsing around on Saturn.
On the basis of simple statistical mechanical models, the prevailing view of the rings of Saturn is that they are unstable and must therefore have been formed rather recently. In this paper, we argue that the Saturn rings and inner moons are in much more stable orbits than previously thought and, therefore, that they likely formed together as part of the initial formation of the solar system. T...
متن کاملMethods for ‘ An unexpected cooling effect in Saturn ’ s polar upper atmosphere ’
The thermosphere model is a global three-dimensional time-dependent general circulation model. The details of the model have been described by Ref 4. We will limit our discussion here to features unique to this study, and general points that will be useful in the discussion that follows. First we describe the symmetry assumptions, boundary conditions and physical parameters of the model, before...
متن کاملEFFECT OF PARTICLES CONCENTRATION AND CURRENT DENSITY ON THE COBALT/HEXAGONAL BORON NITRIDE NANO-COMPOSITE COATINGS PROPERTIES
Metal matrix composite coatings reinforced with nano-particles have attracted scientific and technological interest due to the enhanced properties exhibited by these coatings. Cobalt/hexagonal boron nitride nano-composite coatings were prepared by means of the pulse current electroplating from a chloride electrolyte on copper substrates and a comparison was made with the pure cobalt in terms of...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/337309a0