According to this MIT Technology Review article, researchers at the University of Washington have developed prototype devices that communicate using just ambient radio waves — no batteries needed. The devices achieve this trick by varying how much they reflect and absorb radio waves, and scavenge power from those same radio waves. Bandwidth is low — only about 1 kilobit per second — and range is currently less than 1 meter, though that can reportedly be extended to about 6 meters easily. By eliminating batteries, such devices can become significantly smaller and cheaper, and could appear in a wide variety of scenarios, from contactless payments to warehouse item tracking, plus the killer app of locating your glasses and keys. follow link
Mighty Mouse as Application Switcher
Looking for an easier way to switch between multiple applications? Within Keyboard and Mouse Preferences under System Preferences, you can configure the scroll wheel to act as an Application Switcher. Press the scroll button to bring up Application Switcher, scroll to toggle to the application you want, and hit the scroll button again to switch. You can also double-click the scroll button to quickly switch to the previously active application.
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- ExtraBITS for 19 August 2013 (19 Aug 13)
Researchers Demo Devices Powered by TV Signals