Among specific topics are minima of the Centennial Gleissberg Cycle
and the heliospheric boundary, characteristics of magnetic flux ropes from the sun to the heliosphere, electron acceleration and spectral hardening of continuum emission in solar flares, Voyager 1 measurements and theoretical modeling of magnetized plasma near the heliopause, and analyses of the evolution and interaction of multiple coronal mass ejections and their shocks in July 2012.
Perhaps the solar cycle tapers every 100 years or so in what's known as the Gleissberg Cycle
. But it's not easy to establish the existence of a cycle that turns over on such a long timescale, much less what causes it.