منابع مشابه
Particles and fields in the interplanetary medium.
M\Ian's knowledge of the properties of interplanetary space has advanced radically since 1962, the major part of this advance occurring since the commencement of the International Years of the Quiet Sun. The IQSY has, in fact, been quite unique in that it has seen the augmentation of the extensive synoptic studies of both geophysical and solar phenomena such as were mounted during the IGY and i...
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Nonlinear evolution equation for Alfv6n waves, propagating in streaming plasmas with nonuniform densities and inhomogeneous rnag[letic fielcls, is obtained by using reductive perturbation technique. Numerical solution of this equation, which is a modified derivative nonlinear Schroclinger (MDNLS) equation, shows that the inhomogeneities exhibit their presence as the dissipation. ~’he evolution,...
متن کاملSimulation of Shock Waves in the Interplanetary Medium
The shocks in the solar corona and interplanetary (IP) space caused by fast Coronal Mass Ejections (CMEs) are simulated numerically and their structure and evolution is studied in the framework of magnetohydrodynamics (MHD). Due to the presence of three characteristic velocities and the anisotropy induced by the magnetic field, CME shocks generated in the lower corona can have a complex structu...
متن کاملMeasuring the Interplanetary Medium with a Solar Sail
NASA has been considering a solar sail that would accelerate a craft to a high velocity (∼14 AU/yr) by the time it reached 5 AU. Then the sail would be dropped and the craft would coast alone to deep space. We propose that the sail be retained longer. Then the density of the interplanetary medium could be determined by measuring the drag force on the huge sail using radiometric navigational dat...
متن کاملThe Learning Styles Myth is Thriving in Higher Education
The existence of 'Learning Styles' is a common 'neuromyth', and their use in all forms of education has been thoroughly and repeatedly discredited in the research literature. However, anecdotal evidence suggests that their use remains widespread. This perspective article is an attempt to understand if and why the myth of Learning Styles persists. I have done this by analyzing the current resear...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1991
ISSN: 0252-9211
DOI: 10.1017/s0252921100067270