illustrates the evolution of a research area over time
to understand the trend of research from the past to present
PhD candidates, researchers, supervisors and policy makers
After visualizing the state of the art of a research are similar to State of the art overview you can the VOSviewer “overlay visualization” feature to color the circles with the average publication year corresponding to the terms.
case2.zip file contains data.csv that consists of 2000 records extracted from Scopus, map.txt and net.txt that can be used to open the visualization in VOSviewer, and the visualization.png that is the visualization shown in this page.