anomalous "memory" effects?

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A symmetric harnessed gyroscope accelerated to a given spinning
frequency takes different time periods to stop, depending on the
direction of previous spins. For repeated alternating, anticlockwise
and clockwise spinning, the rotation period in both directions
significantly increases, which is not the case when the gyroscope is
repeatedly rotated in the same direction. Using the measurements it was
observed, that the time of gyroscope's rotation was significantly
lengthened or shortened, what indicates that it either increased or
decreased the movement resistance of the gyroscope. The presented
experimental results suggest the existence of anomalous movement
resistance and demonstrate that a fixed spinning gyroscope displays
unusual history-dependent movement resistance effects. The effect is
real, large, reproducible and does not follow from experimental error
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Those effects strongly depend on material (substance) of the rotor's disk, for example they are great for the rotor's disk made in teflon and small one for the rotor's disk made in plexiglas.
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We made measurements for different settings of rotor, for example the spindle of the rotor was laid horizontally. The effect always exists and is large. For the same bearings and the same dimensions of rotor we have observed different size of the effects. The effect is small if the disk of the rotor is made of plexiglas, and very large if the disk of the rotor is made of teflon.
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