What do A pos and C pos mean?
The # column is the rank of each listed entry for Jana Van Vliet-Ostaptchouk — rank 1 means this entry is where Jana Van Vliet-Ostaptchouk has the most articles or citations. A pos and C pos show the reciprocal: the position of Jana Van Vliet-Ostaptchouk within that entry's own ranked list, by articles and citations respectively. A low value means Jana Van Vliet-Ostaptchouk is among the most prominent contributors for that entry.