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Published online by Cambridge University Press: 25 April 2016
Following past practice, a number of authors have contributed reviews of their own field. These contributions have been edited by the President to reduce major overlaps and in some cases, due to space constraints, to reduce the length of the reviews. When possible reference numbers in the Astronomy and Astrophysics Abstracts are used. As editor, the President accepts responsibility for any shortcomings in the report.