Using Type II Fuzzy Entropy in Thresholding Phase of Motion Detection Based on Temporal Variance and Background Modeling.

A damped magnetic head driver for a stepping motor driver. A damper is attached to a shaft of the stepping motor. A lightweight sealed housing of the damper is rigidly attached to the shaft and contains a hollow portion. A heavy flywheel is fitted in the hollow and is supported on the shaft by ball bearings. A viscous fluid fills the remainder of the hollow. In a further improvement, a circumferential surface of the damper housing has a series of teeth that are engaged by a plunger when power to the disc drive is interrupted.