From: "Robert J. Bradbury" <email@example.com>
>I haven't read this in a while, but I think an active shield is
>one that response actively to a threat. Like a fabric that is
>very soft under normal conditions, but upon sensing a sharply
>penetrating force, becomes as strong as steel. It is kind of
>like the airbag in a car. This could also be done with a flying
>swarm of nanobots in close proximity to your body. These are
>discussed a little bit in Nanomedicine.
Sounds like a layers of Kevlar and chain mail, to protect from both guns and knives....
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