With several search options provided, users can search by discipline, by topic, or simply using a common keyword search. All material can be promptly displayed (and saved) on-screen, but information overload is an actual risk in many pages.



However, it seems that the site does not provide any kind of downloading options

Navigational Aids

Several visual tips are provided along the pages, but dealing with a large amount of data at least a sitemap would certainly be helpful

User Friendliness

While aiming at providing a feeling of popularity and participation, often the site pages are too dense and chocked-full with data, thus sacrificing an easy reading and accessibility