How long does it take an electron to tunnel?

The combination of ab-initio numerical experiments and theory shows that optical tunnelling of an electron from an atom can occur instantaneously.

Wearable sensors gather lots of data—now to make it useful

It's not just about how many steps you've taken or how many calories you've burned in a day. Wearable fitness trackers and health monitors are becoming more commonplace and diverse, but just what do you do with all of that ...

One material, two types of magnetism

When placed next to a bar magnet, an aluminum ball draws gently towards the magnet. In contrast, a ball made of silver moves out of the magnetic field. The mechanisms underlying these different behaviors are known as paramagnetism ...

Android extends dominance in smartphones worldwide

Got an iPhone? You're in the minority. There were four Android phones for every iPhone shipped in the second quarter, research firm IDC said Wednesday. That's up from a ratio of 2.5 to 1 in the same period last year.

Light pulses take a quantum walk

Tourists who drift aimlessly during a sightseeing tour are moving randomly - just like electrons that move from one atom to the next. To obtain a better understanding of these random motions it is often useful to reduce their ...

Amazon expected to unveil tablet at mystery event

With nearly 30 million iPads sold, Apple is the undisputed tablet computer champion. BlackBerry maker Research In Motion, US computer giant Hewlett-Packard, South Korea's Samsung and scores of other companies with devices ...

Amazon press invites could herald iPad rival

Amazon.com on Friday sent out enigmatic invitations to a press event, fueling expectations that the online retail titan will release a tablet computer to challenge Apple's iPad.

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