Fig. 7.
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Comparison of (a) period as a function of curvature radius at the bottom of the dip, R0, for the three geometries considered: Model 1 (solid line), Model 2 (circles), and Model 3 (diamonds). In (b) the comparison of the percentage of discrepancy between the exact period and that estimated by the corrected pendulum model (Eq. (17)) as a function of the exact period.
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