Thursday, March 22, 2012

The camera that sees round corners: Incredible video shows MIT laser technology that 'bounces' light off hidden objects



The camera 'bounces' ultrafast laser pulses off a wall behind a hidden subject - and computers inside 'rebuild' the information into a 3D image of what's hidden

* Could be used for car navigation systems that 'see' round blind corners
* Ultrafast laser pulses used to build 3D image of hidden areas
* MIT team hopes system will be used by police and firefighters

By Rob Waugh

The first camera that can see round corners has been shown off by MIT researchers.

People lurking behind a wall - or buried after an earthquake - can clearly be seen in 3D using the camera, which fires ultrafast laser pulses at walls 'behind' the area that can't be seen, to capture a ghostly 3D reflection.

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The technique is similar to using a mirror to see round a corner - but instead of a mirror, the 'reflection' is reconstructed from laser light that scatters back off a wall.

The camera 'times' the beams of light as they bounce back to its sensors, and builds an image, which is slightly wobbly, but precise to ranges of just one centimetre.

Ramesh Raskar and colleagues used ultrafast pulsed lasers in the research published in Nature Communications - the incredibly rapid laser bursts allow them to time the light as it 'returns' to the camera, building a 3D model.

The system performs the procedure several times, bouncing light off several different spots on the wall, so that it enters the room at several different angles.

The detector, too, measures the returning light at different angles. By comparing the times at which returning light strikes different parts of the detector, the system can piece together a picture of the room.

'Four years ago, when I talked to people in ultrafast optics about using femtosecond lasers for room-sized scenes, they said it was totally ridiculous,' says Ramesh Raskar, an associate professor at the MIT Media Lab, who led the new research.

The team use repeated laser bursts to build a 3D image of the 'hidden areas' of rooms

Raska hopes that a future version of the system could be used by emergency responders - firefighters looking for people in burning buildings or police determining whether rooms are safe to enter - or by vehicle navigation systems, which could bounce light off the ground to look around blind corners.

Sweden cash-free? It's getting there.



A Swedish 500 kronor note is seen in this photo illustration taken in Stockholm in

Sweden cash-free moves include public buses, a few stores, and even some bank offices that don't handle cash anymore. But it could take 20 years before consumers see a Sweden cash-free.

By Malin Rising / Associated Press

Sweden was the first European country to introduce bank notes in 1661. Now it's come farther than most on the path toward getting rid of them.

"I can't see why we should be printing bank notes at all anymore," says Bjoern Ulvaeus, former member of 1970's pop group ABBA, and a vocal proponent for a world without cash.

The contours of such a society are starting to take shape in this high-tech nation, frustrating those who prefer coins and bills over digital money.

In most Swedish cities, public buses don't accept cash; tickets are prepaid or purchased with a cell phone text message. A small but growing number of businesses only take cards, and some bank offices — which make money on electronic transactions — have stopped handling cash altogether.

"There are towns where it isn't at all possible anymore to enter a bank and use cash," complains Curt Persson, chairman of Sweden's National Pensioners' Organization.

He says that's a problem for elderly people in rural areas who don't have credit cards or don't know how to use them to withdraw cash.

The decline of cash is noticeable even in houses of worship, like the Carl Gustaf Church in Karlshamn, southern Sweden, where Vicar Johan Tyrberg recently installed a card reader to make it easier for worshippers to make offerings.

"People came up to me several times and said they didn't have cash but would still like to donate money," Tyrberg says.

Bills and coins represent only 3 percent of Sweden's economy, compared to an average of 9 percent in the eurozone and 7 percent in the U.S., according to the Bank for International Settlements, an umbrella organization for the world's central banks.

Three percent is still too much if you ask Ulvaeus. A cashless society may seem like an odd cause for someone who made a fortune on "Money, Money, Money" and other ABBA hits, but for Ulvaeus it's a matter of security.

After his son was robbed for the third time he started advocating a faster transition to a fully digital economy, if only to make life harder for thieves.

"If there were no cash, what would they do?" says Ulvaeus, 66.

The Swedish Bankers' Association says the shrinkage of the cash economy is already making an impact in crime statistics.

The number of bank robberies in Sweden plunged from 110 in 2008 to 16 in 2011 — the lowest level since it started keeping records 30 years ago. It says robberies of security transports are also down.

"Less cash in circulation makes things safer, both for the staff that handle cash, but also of course for the public," says Par Karlsson, a security expert at the organization.

The prevalence of electronic transactions — and the digital trail they generate — also helps explain whySweden has less of a problem with graft than countries with a stronger cash culture, such as Italy or Greece, says economics professor Friedrich Schneider of the Johannes Kepler University in Austria.

"If people use more cards, they are less involved in shadow economy activities," says Schneider, an expert on underground economies.

In Italy — where cash has been a common means of avoiding value-added tax and hiding profits from the taxman — Prime Minister Mario Monti in December put forward measures to limit cash transactions to payments under €1,000 ($1,300), down from €2,500 before.

The flip side is the risk of cybercrimes. According to the Swedish National Council for Crime Prevention the number of computerized fraud cases, including skimming, surged to nearly 20,000 in 2011 from 3,304 in 2000.

Oscar Swartz, the founder of Sweden's first Internet provider, Banhof, says a digital economy also raises privacy issues because of the electronic trail of transactions. He supports the idea of phasing out cash, but says other anonymous payment methods need to be introduced instead.

"One should be able to send money and donate money to different organizations without being traced every time," he says.

It's no surprise that Sweden and other Nordic countries are at the forefront of this development, given their emphasis on technology and innovation.

For the second year in a row, Sweden ranked first in the Global Information Technology Report released at the World Economic Forum in January. The Economist Intelligence Unit also put Sweden top of its latest digital economy rankings, in 2010. Both rankings measure how far countries have come in integrating information and communication technologies in their economies.

Internet startups in Sweden and elsewhere are now hard at work developing payment and banking services for smartphones.

Swedish company iZettel has developed a device for small traders, similar to Square in the U.S., that plugs into the back of an iPhone to make it work like a credit card terminal. Sweden's biggest banks are expected to launch a joint service later this year that allows customers to transfer money between each other's accounts in real-time with their cell phones.

Most experts don't expect cash to disappear anytime soon, but that its proportion of the economy will continue to decline as such payment options become available. Before retiring as deputy governor of Sweden's central bank, Lars Nyberg said last year that cash will survive "like the crocodile, even though it may be forced to see its habitat gradually cut back."

Andrea Wramfelt, whose bowling alley in the southern city of Landskrona stopped accepting cash in 2010, makes a bolder prediction: She believes coins and notes will cease to exist in Sweden within 20 years.

"Personally I think this is what people should expect in the future," she says.

But there are pockets of resistance. Hanna Celik, whose family owns a newspaper kiosk in a Stockholm shopping mall, says the digital economy is all about banks seeking bigger earnings.

Celik says he gets charged about 5 Swedish kronor ($0.80) for every credit card transaction, and a law passed by the Swedish Parliament prevents him from passing on that charge to consumers.

"That stinks," he says. "For them (the banks), this is a very good way to earn a lot of money, that's what it's all about. They make huge profits."

Vibrating tattoo alerts patent filed by Nokia in US



Vibrating magnetic tattoos may one day be used to alert mobile phone users to phone calls and text messages if Nokia follows up a patent application.

The Finnish company has described the idea in a filing to the US Patent and Trademark Office.

It describes tattooing, stamping or spraying "ferromagnetic" material onto a user's skin and then pairing it with a mobile device.

It suggests different vibrations could be used to create a range of alerts.

The application lists Cambridge-based Zoran Radivojevic as the innovation's lead inventor. It was filed last week and was brought to light by the Unwired View news site.

It suggests a magnetic marking could be attached to either a user's arm, abdominal area, finger or fingernail.

"Examples of... applications may be low battery indication, received message, received call, calendar alert, change of profile, eg based on timing, change of time zone, or any other," the filing reads.

"The magnetic field may cause vibration of one short pulse, multiple short pulses, few long pulses... strong pulses, weak pulses and so on."

The filing also suggests that the magnetised marking could be used as an identity check. It says that by picking a certain shape the user could create a "specific magnetic impedance" - effectively their own magnetic fingerprint.

It says this could act as a "password" and gives the example of a laptop refusing to display content on its screen unless it verifies its user is close by.

'Invasive procedure'

Nokia is far from the only technology firm investigating new uses for haptic - or touch - feedback.

HTC and Samsung have released mobile phones that slightly vibrate when the user types or presses graphical-representations of buttons on their screens.

Engineers at the University of Utah are developing a video games controller that uses haptic feedback via the user's thumbs to create the sensations of waves, pulses and a bounce effect.

Researchers at the University of Leeds have also created a handheld prototype designed to let cancer specialists locate and categorise patients' tumours by how dense they feel while examining them from a remote location.

However, Nokia's idea stands out for seeking to enhance touch feedback by permanently, or at least semi-permanently, marking the users' body.

"Our research suggests that once a user become accustomed to haptic feedback on a phone or tablet screen, other devices that don't offer it can feel 'dead'," Marek Pawlowski, editorial director at the mobile industry research firm PMN told the BBC.

"Nokia's patent suggests that their magnetic mark could be invisible - which might make this appealing to some. But in the immediate term I think users would draw the line at anything that is invasive like a tattoo or would be seen to have potential medical effects."

A spokeswoman for Nokia was unable to confirm whether Nokia intended to follow up its patent application with further research.

Friday, March 16, 2012

Santorum won, Romney lost - but all eyes are on Gingrich



The conservatives are looking at Tuesday’s results and drooling when they do the math: without Gingrich in the race, Santorum would have wiped the floor with Romney, whose status would immediately change from inevitable to anything but.

 By Chemi Shalev

Rick Santorum was the big winner in Tuesday’s primaries in Alabama and Mississippi and Mitt “the inevitable” Romney was the loser. But the man of the hour is Newt Gingrich, who was not only defeated and humiliated but suddenly seemed completely redundant in the Republican race for the presidency.

Gingrich’s losses in these two ultra-conservative Deep South states demolished the “Southern Strategy” on which he had based his continued candidacy and his pledge to “go all the way to Tampa”, where the Republican Convention will be held. Gingrich, a Georgian with established conservative credentials, was overtaken by a younger Northerner, despite his home field advantage and in contests which he himself had described until recently as “do or die”.

For many leaders of the conservative wing of the Republican Party, this will be the straw that breaks the camel’s back, and as of this morning they will be pressing Gingrich to behave like a proper southern gentleman and to clear the way for a true one-on-one duel between their darling Santorum and Romney, to whom, obviously, they refuse to warm. The conservatives are looking at Tuesday’s results and drooling when they do the math: without Gingrich in the race, Santorum would have wiped the floor with Romney, whose status would immediately change from inevitable to anything but.

U.S. commentators were already speculating last night about the reaction of Gingrich’s main funder, Sheldon Adelson, to what they described as his failed bet on the former Speaker. On the one hand, according to a recent report in the Wall Street Journal, Adelson wants to keep Gingrich in the race so that he can syphon off votes from Santorum and ensure Romney’s selection as the Republican candidate. But Adelson’s prestige might suffer, these analysts believe, if he is seen to be backing an absolute “straw candidate” whose sole purpose is to stack the deck against Santorum.

In his speech after the results came in last night, Gingrich lamely tried to stick to his claim that only he can beat President Obama in the debates before November’s elections and his insistence that he knows how to miraculously bring down the price of gas to $2.50 a gallon. But his voice was weak, his eyes were weary and his heart obviously wasn’t in it. The danger facing Gingrich now is that he won’t pull out of the race in time but conservative votes will make the decision in his stead and abandon him in the upcoming contests in Missouri, Illinois and Louisiana.

In such a scenario Gingrich, whose considerable talent is dwarfed only by his enormous self-regard, may find himself facing a punishment that would be cruel and unusual even for a politician with a standard-issue ego: his detractors will gleefully ridicule him while his supporters will turn away, with pity in their eyes.

Israel ultimatum: Stop the missiles by Saturday night. Hamas leader in Tehran

Mahmoud A-Zahar of Hamas welcomed in Tehran

DEBKAfile Exclusive Report

After five days of non-stop missile fire on a dozen towns and villages, Israel Thursday night, March 15, gave Egypt and Hamas two days to halt the shooting or else the Israeli Defense Forces would go into action against Gaza. debkafile’s military sources report that neither Egypt nor Hamas can be expected to go up against the missile shooters now.  The attacks have now been taken over from Jihad Islami by a small group of Salafi Palestinians calling itself Haraka Muhaheddin, which belongs to Jalalat, the al Qaeda roof organization in the Gaza Strip.

Most of the missiles are now coming from the Salafi concentrations in the southern part of the enclave –targeting Beersheba and Netivot Thursday morning and as night fell aimed at Ashdod, Ashkelon, Shear Hanegev and the Eshkol region. The firing escalated after Israel laid down its ultimatum

Egypt and Hamas don’t know exactly who is giving Haraka the missiles, except that they are smuggled from Sinai through tunnels managed by Iranian intelligence agents in conjunction with local al Qaeda networks.

It is highly unlikely that Hamas will venture to lay hands on these Salafi terrorists at a time when one of its top officials in Gaza, Mahmoud A-Zahar, is visiting Tehran for talks with Iranian leaders who are keen to keep the missile assaults going.

His visit marks the Hamas fundamentalists’ return to the Iranian fold - that is if they ever really left it. This, Israeli strategists have chosen to ignore and are treating Hamas as a non-participant in the missile offensive and available to help Cairo bring the terrorists to accept a ceasefire.

The sequence of events leading up to this week’s violence points to the opposite conclusion and, therefore, the probable escalation of the violence rather than a truce.

Five days before the missile fire began, on March 5, a Hamas Deputy Politburo Chief Mousa Abu Marzouk and Hizballah’s Hassan Nasrallah met in Beirut and finalized tactics for building up tensions on Israel’s borders.

Monday, March 12, Mahmoud A-Zahar was in Cairo to wind up Gaza ceasefire terms with Egyptian officials when, to their astonishment, instead of returning to Gaza, he boarded a plane to Tehran. He is still there.

And so, while the Egyptians try and reach some sort of accommodation with Hamas for a truce, Hamas itself is in close communion with the Iranians, who want to see the Israeli military stuck in a messy a showdown with the Palestinian Salafis.