Users of tablet computers should place their device on the table and tilt its screen, rather than have it flat on their lap, to avoid potentially painful hunching of the neck, a study suggested Wednesday.

"Tablet users may be at high risk to develop neck discomfort based on current behaviours and tablet designs," it warned.

A team led by environmental health researcher Jack Dennerlein of the Harvard School of Public Health asked seven men and eight women who were experienced tablet users to carry out tasks on an iPad2 and a Motorola Xoom.

Using a motion-analysis system, the team filmed the 15 volunteers as they worked on the tablet in four common configurations.

In the first position the tablet was not placed in its proprietary case but held on the lap in one hand while the other was used to touch the screen.

In the second the tablet was placed on the lap, but stayed in its case. The user worked with both hands on the screen.

In the third, the tablet was set up in its case on a table, with its screen set at a lower angle, and the user worked with both hands.

The last configuration, dubbed "table-movie," entailed placing the tablet on the table in its case, tilted at a higher angle. The user did not work on the screen and instead watched movies or other programming on it.

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If you’ve ever used the Internet, you have an online identity. Maybe it’s slight: a Hotmail account here, a comment on a news story there. Or maybe you’ve been more prolific, leaving a trail of usernames, accounts, messages, and profiles across the digital landscape.

In any case, an active internet user owes it to himself to do a bit of self-Googling. What you’ll find will be both enlightening and humbling—even worrying.

Unease about your online identity shouldn’t be limited to how much information is publicly available. Online advertising is the engine that drives the Internet’s largest sites, including Google and Facebook, and it depends on your personal—and allegedly private—data for fuel. "The government, companies, and marketers all want us to share as much information as possible because that’s what’s good for them," says Rebecca Jeschke of the Electronic Frontier Foundation, "and it’s time to think of what’s good for us."

While most Internet users seem fine with privacy tradeoffs, the lack of control will lead some to consider the nuclear option: total Internet evacuation. But taking yourself offline isn’t as simple as logging out—it requires a little bit of work. Here’s how.


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As advances in computer technology make gadgets ever smaller and more portable the idea of carrying a screen of any kind could soon be outdated. Consumer products with screens have dropped in size from computer to laptop to tablet via phone

But one company specialising in cutting edge visual technology waIsraeli company Lumus has shown off the PD-18-2, which may look like a cumbersome pair of shades but allow the user to see high-quality images while they walk.nts to beam information directly into your field of vision.

Lumus, an Israeli company, specialises in what it calls Light-guide Optical Element (LOE) technology.

It's latest product is the PD-18-2, which may look to the untrained eye like a cumbersome pair of sunglasses.

But inside the lenses of the glasses, the user can see high-quality full colour images. Products like this are already on the market for professional and military use, but where the next-generation PD-18-2 differs is that users can see though the spectacles too, instead of having the images block their vision.

The translucent lenses allow for what the manufacturer calls 'augmented vision', overlaying images or graphics over your usual field of vision.

They are designed for professionals such as pilots, surgeons and soldiers but there are hopes that it can be adapted for the consumer market so people could watch film or TV on the move, or play video games as they walk around.

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