Another screenshot that gives an up-to-date glimpse of the universities-only oaFindr service, in action. In this case it’s from ETH Zurich, which has a trial running with its students…
In JURN, for same search, slightly more results. Plus Google’s leading relevancy-ranking…
Of course, it’s going to help if you at least try to do a search using basic quote marks: solar “cosmic rays” gets 290,000 results. solar “cosmic rays” troposphere whittles it down to a mere 24,500.
Update, Nov 2017: OAFindr is now called 1Findr.