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COPYRIGHT 2006 Ziff Davis Media Inc.
It's very much in vogue to tout active systems as inherently better than passive systems. BMW's new TV ads, building on a campaign that actually began last May, tell you that it's better to have the agility to avoid an accident than merely the sturdiness to survive it. Personal audio systems use active noise cancellation to isolate you from your environment. Lenovo laptop ads dramatize the ability to push a button and regenerate a corrupted PC's previous configuration.
There are many good reasons to pursue an active systems approach. In auto design,...
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