Researchers at the Georgia Institute of Technology have created a passive motion/contact sensor that detects motion using only sound. Without electricity, electronics, or batteries. The sensors are ...
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Heat and motion sensors are showing up under Justice Department desks. Employees say it's 'creepy'
OTTAWA — The federal justice department has widened its use of heat and motion sensors installed under staff’s desks, raising further concerns from staff and a union that they could eventually be used ...
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