Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 196

A. Surjalal Sharma University of Maryland, College Park UMD, UMCP, University of Maryland College Park - Goddard Planetary Heliophysics Institute. His main interests are Space Plasma Physics and Nonlinear Dynamics. Current efforts include magnetospheric physics, comets and stellar variability. Previously he has contributed to the theories of laboratory plasma devices at Cornell University, Physical Research Laboratory, Ahmedabad, and Institute for Plasma Research, Gandhinagar, India.