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2021
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.
A theory is proposed for of the generation of the first two harmonics of a nonlinear photoacoustic signal of a solids sample with an arbitrary value of thermal conductivity. For limiting cases (thermally thin and thick samples) has been obtained simple expressions for the dependence of the amplitude of the excited photoacoustic signal from the emissivity of the sample and the thermophysical parameters of the sample, gas and substrates, including their thermal coefficients.