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Time-lapse images of (a) zigzag motion. Time series of (b) reciprocating motion, and (c) irregular polygonal turning. (d) Trajectory of centroid for zigzag motion and irregular polygonal turning. For irregular polygonal turning, two trajectories (turning angles of 60° and 90°) are shown. (a) ν = 400 mm2/s, f = 93 Hz, Vd = 0.3 ml, Γ = 111 m/s2. (b) ν = 37 mm2/s, f = 90 Hz, Vd = 0.3 ml, Γ = 74 m/s2. (c) ν = 37 mm2/s, f = 120 Hz, Vd = 0.3 ml, Γ = 95 m/s2.
