Download Biomechanics: Proceeding of the First Rock Island Arsenal by Jay Tol Thomas (auth.), David Bootzin, Harry C. Muffley PDF

By Jay Tol Thomas (auth.), David Bootzin, Harry C. Muffley (eds.)

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Extra resources for Biomechanics: Proceeding of the First Rock Island Arsenal Biomechanics Symposium April 5–6, 1967

Sample text

To release the object the amputee then operates the command switch again, driving the motor in the reverse direction. This may approximate the normal grasp sequence, namely the decision to grasp is made on the conscious level, while the force is determined and applied subconsciously. , lifting a paper cup full of mercury. Visual feedback would have to provide the warning in our system, but this occurs in such a small number of situations that the incorporation of a subsystem to prevent this was not deemed necessary.

Airplanes are birdlike. High-performance underwater seacraft are fishlike. I don't think it necessary to belabor the difference in achievement between air or sea transportation and land transportation in order to highlight the benefit of nature's guide. In the first two cases nature has been far outstripped, while in the latter we are far behind nature when operating in natural terrain, If we agree that animals can move off the road with considerably greater ease than can a man-made vehicle, we can conclude that a vehicle which is based on the wheel may not represent the optimum vehicle form.

2. Block diagram of electtonics (English hand). that initially the force necessary to Iift a particular object be learned by trial and error since the feedback loop does not include the object to be lifted. Any changes in the system can result in over or under grasp, and the only clue to this change is a crushing or dropping of the object • . A prehension system developed at our laboratory is based on the philosophy that only positioning and grasp decisions are to be made by the amputee. This can be done by simple on-off switching.

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