How to choose a surge protector

Question: The consensus is that it's proper to insert surge protectors between the power source and the computer. The question is, how big? How many joules? Is it true that they "wear out" in a year or so?

Tacit hand device steers blind to safety (w/ video)

(PhysOrg.com) -- A hand device called the Tacit can help the blind and visually impaired move around safely in complex environments. Wrist-mounted, the device uses ultrasonic sensors mounted above the knuckles that can pick ...

Nanocomposite material provides photonic switching

(PhysOrg.com) -- Integrated photonic devices represent the wave of future technology. These devices will be extremely small, making use of photons on the nanoscale, and (hopefully) be very efficient in terms of power use. ...

Lessons from cockroaches could inform robotics (w/ video)

Running cockroaches start to recover from being shoved sideways before their dawdling nervous system kicks in to tell their legs what to do, researchers have found. These new insights on how biological systems stabilize could ...

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