Persagen.com

Please note: Persagen.com requires popups (for logins) and JavaScript.
Upon first visiting this page, you need to login to the Apache Solr server, via a popup (guest | @Guest123), a consequence of Persagen.com's security settings (SSL/TLS, https).
For the moment access is free, but registered users donors can additionally login to the site using their registered u/n and p/w.

If you encounter issues, please check your browser extensions; e.g. Firefox:

If that does not solve the issue please check your browser settings; e.g.:

enable JavaScript in your web browser

Activate JavaScript on an Android Phone or Tablet

Allow Pop–ups

Allow/block popups

Addendae. Persagen.com is best used / viewed on a desktop or computer with a standard monitor. Access on mobile devices may be suboptimal.
Some Android versions appear to be problematic (likely a permissions issue re: JavaScript or display styles?) - while others work (outstanding issue for future resolution).

Ontology D3.js visualization with search, pan, zoom

Note: "Leonard Leo"-related demo / development code - for illustration only [What is an ontology?]. Pan, zoom with mouse/wheel.

Click to drag; mouse wheel (or double click / Shift-double click) to zoom at cursor position. Page Up/Down to scroll webpage. Reload page to reset all selections, views.

Knowledge graph demo: Leonard Leo

Note: "Leonard Leo"-related demo / development code - for illustration only [Demonstration article]. Pan, zoom with mouse/wheel.