Fig. B.1

The ratio between
as given by Eq. (B.1), and
approximated with the parabola given in Eq. (B.2), as a function of the number of standard deviations. The
difference between the two curves is always less than 3%. Fitting a cubic instead
of a parabola does not improve the approximation significantly and makes the
relation
harder to invert.
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.