Using the passive-power principle found in crystal radios, the method has proved successful over short distances in places where it is difficult to replace batteries or carry out maintenance.

ECONOMIST: Wireless charging

There is an increasing number of investors day traders, short-sellers, arbitrageurs, hedge funds, single-issue shareowners, passive index trackers, etc who have no incentive to concern themselves constructively with issues of governance and long-term value creation.

ECONOMIST: Simeon says...

In a very short period of time, Facebook and now Twitter grew by allowing us to be passive, while still enjoying the benefits of the platform.

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