  Most of the scientometric indicators use only the total number of citations
of an article and produce a single number for scientific assessment of
scholars. Although this concept is very simple to compute, it fails to show the
scientific productivity and impact of scholars during a time-span or in a year.
To overcome this, several time series indicators have been proposed that
consider the citations from the entire research career of a scholar. However,
these indicators fail to give a comparative assessment of two scholars having
same or very similar index value. To overcome this shortcoming, h-index
sequence was proposed to assess the impact of scholars during a particular
time-span and to compare multiple scholars at a similar stage in their careers.
The h-index sequence is based on the h-index formulation. One of the main
issues related to the h-index is that it completely ignores the excess citation
in scientific assessment; h-index sequence also exhibits a similar behaviour.
To overcome these limitations, in this article, we have discussed the EM and
$EM^{'}$-index sequence, and performed an empirical study based on yearly
citation count earned from all publications of 89 scholars' publication data.
The element of the EM and $EM^{'}$-index sequence for a given year shows the
impact of a scholar for that year. We conclude that the EM and $EM^{'}$-index
sequence could be used as an alternative metrics to asses the impact of
scholars.
