Free Access
Fig. 2
Relative variation of a around the mean value
in a 9000 days’ time span.The
central curve represents the residual after substracting the sinusoidal terms of the
Table 1.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.