Accessing the journal environments
Scroll on page at http://www.leydesdorff.net/cpc_cos/index.htm until you see the CPC you wish to visualize, and click on it.
1. One clicks on the description; a file vosviewer.jnlp is downloaded.
2. Use “Show in finder” and right-click on this file; choose “Open”;
3. In the new screen, choose “Open” (second time);
4. In the next screen, choose “Run”.
Alternatively, you can click on the label and obtain the map as jpg.