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2016
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
We propose an optical frequency standard based on a femtosecond laser in which the shift of the frequency comb is controlled by means of an external high-finesse interferometer. The standard does not require having a large spectral bandwidth of the laser radiation, which allows extending the proposed method to nanosecond and picosecond mode-locked lasers.