Showing posts with label Technology. Show all posts
Showing posts with label Technology. Show all posts
Filed under by Aditya kumar at 3:22 AM

(PhysOrg.com) -- Technology using catalysts which make hydrogen from formic acid could eventually replace lithium batteries and power a host of mobile devices.

Filed under by Aditya kumar at 3:20 AM

You've heard of Apple TV, the $99 set-top box that allows you to rent movies and TV shows, watch Netflix titles, and stream photos and music from your home network to your living room television set. But what would you think about an Internet-connected HDTV built and branded by Apple?

Filed under by Aditya kumar at 3:18 AM

Well, this could be a little disappointing. However, we don’t think there’s reason for us to keep it a secret. HTC has officially decided that their unique HTC Sense 3.0 UI will not be rolling out to older devices. A tweet from HTC’s official Twitter account has confirmed this.

Filed under by Aditya kumar at 5:48 AM





Good news for teachers looking to collaborate with their colleagues in other parts of the world. Skype has a new free service just for educators called Skype in the classroom, "a free global community created in response to, and in consultation with, the growing number of teachers" using the tool to help students learn.

Filed under by Aditya kumar at 5:42 AM



The Samsung Focus runs on Windows Phone, a Microsoft platform that app developers are embracing.

IPHONES and Android phones seem to be everywhere I look in Silicon Valley. The future is obvious, isn’t it? IPhone, Android and no one else. They will form an exclusive duo in smartphones, just as Windows and Mac have in personal computers. 

Filed under by Aditya kumar at 5:36 AM

How to Make Your PC as Fast as the Day You Bought It
One of the most frustrating things in life is a slow computer. 
Every few years, we buy an expensive new PC and love how fast it starts up, runs programs, and loads websites.  Inevitably though, it starts to slow down until eventually we are pulling our hair out waiting for it to do routine tasks.

Filed under by Aditya kumar at 5:42 AM

This bicycle is the first in the world to be created simply by printing it out on a computer, using groundbreaking new technology.
The fully-working cycle, which is made of nylon, is the result of an extraordinary project and is as strong as steel and aluminium but weighs 65 per cent less.
Scientists in Bristol designed the bike on a computer and sent it to a printer, which placed layers of melted nylon powder on top of each other to build-up the machine.
Individual components such as gears, pedals and wheels are usually made in different factories and assembled into a finished bike but the Airbike is a single, complete part.

The wheels, bearings and axle are incorporated into the 'growing' process, known as Additive Layer Manufacturing.
The Airbike can be built to the rider's own specification so requires no adjustment. It also requires no conventional maintenance or assembly.
It is made by the European Aeronautic Defence and Space group in Filton, near Bristol,  The 3D printing method allows products to be made from a fine powder of nylon, carbon-reinforced plastics or metals such as titanium, stainless steel or aluminium.
They are drawn using computer-aided design and then sent to a printer, which is filled with the powdered material.
A computer splits the 3D design into many 2D layers and a laser beam is used to melt the powder material into the first of the layers.
This is then covered by a new layer of powder and the process is repeated with the next 'slice'.
The manufacturing process uses about one-tenth of the material required in traditional methods, reducing waste.
The technology is likely to be used in industrial applications such as aerospace, the motor industry and engineering.
Lead engineer Andy Hawkins said: 'The possibilities with ALM are huge - it's a game-changing technology.
'The beauty is that complex designs do not cost any extra to produce. The laser can draw any shape you like.
'Many unique design features have been incorporated into the Airbike, such as saddle cushioning or the integrated bearings encased within the hubs.'
Robin Southwell, chief executive of EADS UK, said: 'The Airbike is a fantastic example of British innovation at its very best.
'The team at EADS in Bristol includes world-class engineers who continue to push boundaries by working at the forefront of technology.'

Filed under by Aditya kumar at 9:48 AM

Online malcontents who try to take down web servers now face a new kind of defence system that can fight back. A common attack known as distributed denial of service (DDoS) knocks websites offline by flooding them with traffic from a horde of infected computers, or botnet. Yuri Gushin and Alex Behar of the internet security firm Radware, based in Tel Aviv, Israel, say they have turned this attack back on its perpetrators.
Most current DDoS defences work by blocking connections from attacking computers or throttling data rates to let only a certain amount of traffic through. But these methods can't handle the larger attacks that are increasingly common. "Today's technologies are not cutting it," explain Gushin.

The pair's more sophisticated technique manipulates an attacker's connection in order to make botnet computers work harder. By intentionally ignoring part of the intended connection request they are able to trick the attacker's computer into making a very slow connection to the server as it continues to try to make contact. This lasts for around 5 minutes. When the attacking botnet computer is slowed down in this way it will automatically try to send new connection requests, badly affecting its performance. Eventually the botnet computers making the attack will be forced to give up, depending on the instructions given to them by the botmaster who launched the attack.
This approach proved successful last year, when Gushin and Behar helped defend against attacks perpetrated by Anonymous, the loose collective of internet activists that took up digital arms to fight for WikiLeaks. "We were able to really turn the tide on the attack," says Behar

Who goes there?

Of course there's no point in stopping attacks if legitimate users can't get through, so the pair also challenge incoming connections to prove they are genuine requests before they launch their defence When a connection attempt is made, the server responds with a piece of Javascript or Flash that an ordinary user's computer will load in their browser. This provides a key that verifies the user as legitimate and allows them to access the site normally.
Attackers won't pass the test because computers in a botnet access servers without using a browser. "Unless it's a real browser on the other side with a real human behind it, the bots usually wouldn't render that content," explains Behar. The pair released a free version of this verification technique, dubbed Roboo, at the Black Hat Europe conference in Barcelona this week.
The defensive advantage afforded by Roboo could be short-lived, though, if attackers modify their tools to execute the test code. "If such techniques become widely deployed, attackers are driven to overcome them, yet nothing technically stops attackers using more sophisticated malware to do so," explains Steven Simpson, a researcher in network resilience at Lancaster University, UK.

Filed under by Aditya kumar at 8:53 AM

War is serious business. Life-and-death stuff. Brutal, bloody and unrelenting. But who says it can't also be fun?! Whether it's fryin' up some bacon, going sledding, or just taking the gang out for ice cream, here are six ingenious uses of combat equipment that prove a little war is no excuse to go without a party.


#6
Nothing has been more responsible for machine gun noises made with the mouth than toy World War II-era fighter planes. It's easy to see why kids love them: The real ones were some of the most badass machines ever built. They dealt death to ground, sea and air alike. And when you were done using them to tear apart your enemies in a hail of bullets, you could also make yourself some refreshing ice cream!
Wait, what?
Yep: You can make ice cream with a plane. To quote: "To stave off boredom the ground crews rigged 19-liter (five U.S. gallons) cans with a wind-driven spinner connected to a mixing rotor, and hooked up one under each wing of an F4U. A pilot would take the aircraft up to high altitude for a given period of time and then come back to base with the ice cream." And it wasn't just an isolated incident pulled off by the World War II equivalent of Bill Murray in Stripes, either -- the practice was pretty common. In some cases, the soldiers even asked the pilot to do loops and barrel rolls to stir the ice cream, not even going to the trouble of fitting a mixer like they did with the F4U. Thankfully, modern planes are no longer used for such trivial matters

#5
If you need an introduction to the concept of machine guns, our good friend Rambo would like to undertake that courtesy on our behalf. We'll just tell you that older machine guns often ran so hot they had to be handled with oven gloves while the barrels were changed. So obviously, when they weren't dealing hot metallic death to whatever ethnic group it was cool to kill that day, they did double duty ... as teakettles.

Not pictured: Chamomile.
Wait, what?
Those older machine guns often had large bags attached to the side, filled with glycerin, water or, if all else failed, even the soldier's own urine. Regardless of the liquid, whatever was in the bag became boiling hot after the gun was fired. Never ones to waste resources, those wily Brits often used the preheated bags to make cups of tea with the excess water. Hopefully, they didn't get the pee-bags mixed up. On a few occasions, soldiers were even observed firing off bursts for no reason other than to simply heat the water, because the guns could bring water to boil in less than a minute -- way faster than any other heating method they had access to. That's right: The very first commercial microwave ... was a Vickers machine gun.

#4

Combining all the fun of Silly Putty with all the danger of a live bomb, plastic explosives have changed the face of modern warfare. The stuff is just slightly more powerful than TNT, and a single pound of it is enough to turn you and everyone within eight feet of you into an airborne meat Slurpee. Or to fry up a nice frittata!
Wait, what?
You can totally cook with C4. In fact, there are a lot of stories talking about soldiers doing it. The thing is, despite being a gigantic, murderous explosion distilled into putty form, C4 is almost completely safe: You can cut, burn and even shoot it without detonating it. And when burned, it will give off enough heat to light even the wettest wood, so stories about soldiers sitting around campfires made out of plastic explosives are actually not that uncommon. But before you run out to Unstable Ted's Black Market Explosives and Hotwings, remember that we said "almost completely safe" up there. And here comes that bastard Almost: C4 gives off deadly fumes when it's burned. We'll leave it up to you to weigh the pros and cons of the situation. On the one hand: inhaling airborne toxins. On the other: a barbecue that will please your friends almost as much as it terrifies your enemies.




Filed under by Aditya kumar at 8:45 AM

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