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New nano-material promises 2GB data speed per second

ujjwal on 08/15/2016 at 5:55pm (UTC)

Scientists have developed a new material that may not only provide efficient lighting, but also power wireless internet with data speed of up to two gigabytes per second.
Researchers from King Abdullah University of Science and Technology (KAUST) in Saudi Arabia developed the new nanocrystalline material that rapidly makes white light out of blue light.
While Wi-Fi and Bluetooth are now well established technologies, there are several advantages gained by shortening the wavelength of the electromagnetic waves used for transmitting information.
Visible-light communication (VLC) makes use of parts of the electromagnetic spectrum that are unregulated and is potentially more energy-efficient, researchers said.
VCL also offers a way to combine information transmission with illumination and display technologies - for example, using ceiling lights to provide internet connections to laptops, they said.
Many such VLC applications require light-emitting diodes (LEDs) that produce white light. These are usually fabricated by combining a diode that emits blue light with phosphorous that turns some of this radiation into red and green light.
However, this conversion process is not fast enough to match the speed at which the LED can be switched on and off.
"VLC using white light generated in this way is limited to about one hundred million bits per second," said Boon Ooi, a professor at KAUST.
Researchers instead used a nanocrystal-based converter that enables much higher data rates.
They created nanocrystals of cesium lead bromide that were roughly eight nanometres in size using a simple and cost-effective solution-based method that incorporated a conventional nitride phosphor.
When illuminated by a blue laser light, the nanocrystals emitted green light while the nitride emitted red light. Together, these combined to create a warm white light.
Researchers characterised the optical properties of their material using femtosecond transient spectroscopy.
They were able to show that the optical processes in cesium lead bromide nanocrystals occur on a time-scale of roughly seven nanoseconds.

This meant they could modulate the optical emission at a frequency of 491 Megahertz, 40 times faster than is possible using phosphorus, and transmit data at a rate of two billion bits per second, researchers said.
The white light generated using their perovskite nanostructures was of a quality comparable to present LED technology, researchers said.

Big Bazaar teams up with Snapdeal for its Maha Bachat sale

ujjwal on 08/15/2016 at 6:18am (UTC)

Big Bazaar, the popular hyperlocal marketplace, has teamed up with Snapdeal for the period between 13 to 17 August as a part of Kishore Biyani-led Future Group’s Maha Bachat sale. This partnership will take Big Bazaar products to consumers’ doorsteps.

Commenting on the partnership, Rajan Malhotra, President, Retail Strategy & Convergence, Future Group, said “Big Bazaar’s Maha Bachat Days is India’s most widely anticipated sale and we are pleased that this sale will be even bigger this time through our exclusive online partnership with Snapdeal. This partnership will help us take the deals of Maha Bachat to the customer base of Snapdeal and widen our reach to geographies where Big Bazaar is not physically present. Snapdeal customers will also be able to benefit from great deals that Big Bazaar provides with its sourcing strength.”

Future Group already operates in 240 cities and towns across India and the association with Snapdeal will only add to its buyers across more than 6000 cities and towns in India, bringing them access to the Maha Bachat offers of Big Bazaar. Maha Bachat days is offering deals and offers across multiple categories such as kitchenware, home décor, home electronics, personal care appliances, to name a few.

Commenting on the partnership, Tony Navin, Senior Vice-President, Partnerships and Strategic Initiatives, Snapdeal, said “We have built a comprehensive and frictionless interface between Snapdeal and Big Bazaar. This partnership is a winning arrangement for the consumers as it gives them easy access to Big Bazaar’s deep assortment of popular products, all from within the comfort of their homes. The value and popularity of Big Bazaar products and the tremendous reach of Snapdeal form a strong foundation for a long term partnership between us.”

Recently, there was a lot of speculation over Future Group acquiring Jabong, before Flipkart’s Myntra snapped it away the online fashion retailer. Snapdeal and Future Group were earlier said to be the forerunners at acquiring Jabong for obvious reasons. In fact, the latter seems to be making a gradual shift towards the online space. It recent bought online furniture store FabFurnish.

The No Man’s Sky PC launch was far from stellar; here are quick fixes to the biggest problems

ujjwal on 08/15/2016 at 6:12am (UTC)

There are few games that have garnered as much attention from gamers as No Man’s Sky. Developed by an indie game studio, the game was never meant to be as big or as steeped with expectations as it currently is.

While the developers have always been very clear about what No Man’s Sky actually is, “a game about exploration and survival in an infinite, procedurally generated universe,” gamers’ imaginations have run wild. Their expectations from the game have far outstripped the developer’s promise, leading to massive disappointment for some.

This much anticipation and expectation isn’t healthy for a AAA title and even more so for an indie title like No Man’s Sky. The game’s PS4 launch went off without a hitch, but when it came to PC, the experience was far from stellar.

Numerous complaints flooded forums, Steam and the game’s subreddit. People complained of stuttering frame-rates, inability to get beyond the lock screen, constant crashes, game freezes and clunky controls.

Ad blocker by Opera launched on all mobile platforms

ujjwal on 08/15/2016 at 6:10am (UTC)

Opera has started the global rollout of built-in feature to block the advertisements on websites. The advertisements are universally filtered from the websites on server level while applying Opera’s data compression tech to save the data used on the consumers’ end. The app is now available on iOS, Android phones and Windows phones. It offers native advertisement blocking in the Opera Mini app for Android and Opera browsers for computers.

“Users are demanding ad blockers because of the better browsing experience it offers,” says Nuno Sitima, SVP Mobile Browsers, Opera. “Opera users can speed up their mobile surfing, skip extra data charges and stretch their internet packages even further by blocking in the browser intrusive and data-wasting ads and heavy tracking.”

According to benchmarks, Opera browser turned out to be faster than Google Chrome and other browsers while the Adblock browser lags by 79n terms of browsing. While the average size of a webpage after removing advertisements is 229 KB. Chrome lagged behind by keeping the size of the page about 84ore with 422 KB and Adblock Browser burned 3.4 times the size by making the size of the page as 784 KB.

According to a research conducted by PageFair, approximately 90f all the people on the mobile web were blocking ads, which translated into 419 million people in terms of numbers which was double the number of people blocking the advertisements on desktops.

Opera emphasised the need for progressive web apps, websites that run like mobile apps but inside the mobile web browser, pushing notifications and updates like a normal web app for a significant reduction in data and storage usage.

Mozilla addresses major Firefox for Android vulnerability

ujjwal on 08/15/2016 at 6:07am (UTC)

A completely new vulnerability in the Firefox browser for Android devices that could have given hackers access to both the contents of a handset’s SD card and the browser’s private data, was recently uncovered. The loophole was first discovered by an ethical hacker from viaForensics, Sebastián Guerrero Selma, who also detailed how the exploit could be conducted, according to Android Police.

Selma disclosed the issue to Mozilla, along with information about how it can be recreated as well as a proof-of-concept app as a demonstration. The company has now said that the vulnerability has been fixed with the v24 update, rolled out via the Play Store on September 17.

App data is stored in the internal storage and even the user is prevented from accessing it directly, except when they have root access. The vulnerability discovered by Selma allowed hackers to get inside the secured folder that Firefox has created. The hack, according to Selma can be launched remotely or by the user by executing a local malicious HTML file or installing a malicious app. If successful, the hacker can access cookies, login credentials, bookmarks or anything else that Mozilla is safely putting inside its private folder.

Researchers make forensic tool to recover data from smartphone RAM to help in criminal cases

ujjwal on 08/15/2016 at 6:06am (UTC)

A new tool to recover information stored in smartphone’s volatile memory could give investigators important clues to solve a criminal case, say researchers. With the new device, the researchers from Purdue University move the focus from a smart phone’s hard drive, which holds information after the phone is shut down, to the device’s RAM, which is volatile memory.

“We argue this is the frontier in cyber crime investigation in the sense that the volatile memory has the freshest information from the execution of all the apps,” said lead researcher Dongyan Xu. “Investigators are able to obtain more timely forensic information toward solving a crime or an attack,” Xu noted.

Although the contents of volatile memory are gone as soon as the phone is shut down, it can reveal surprising amounts of forensic data if the device is up and running. The team’s early research resulted in work that could recover the last screen displayed by an Android application.

Building on that, Xu said, it was discovered that apps left a lot of data in the volatile memory long after that data was displayed. RetroScope makes use of the common rendering framework used by Android to issue a redraw command and obtain as many previous screens as available in the volatile memory for any Android app.

The device requires no previous information about an app’s internal data. The screens recovered, beginning with the last screen the app displayed, are presented in the order they were seen previously. “Anything that was shown on the screen at the time of use is indicated by the recovered screens, offering investigators a litany of information,” Xu said.

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