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The time dependence (a) of the temperature measured at each of the three positions indicated in (b) (filled triangles, hollow squares, hollow circles) and on the screw surface near the screw tip (filled circles). Photograph (b) of a honeydew melon showing three locations (red numbers 1–3) where the time dependence of the temperature was measured during a test scan. The arrow indicates the approximately circular current path of the induced current.
