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Showing posts with label nano. Show all posts
Showing posts with label nano. Show all posts

Thursday, September 9, 2010

rubber balls bounced: MATERIALS ENGINEERING, LONG AGO

Just about everybody’s bounced a rubber ball. But making that ball bounce the first time was quite an accomplishment. Who did it? We’ll see. Today, on Engineering Works! Listen to the podcast.We’re used to high-tech materials. Lightweight composites. Super strong adhesives. Polymers that shift shape on command. And it’s easy to think that coming up with new materials or changing old ones is something new. It’s not. 


Take latex, or rubber, for instance. Charles Goodyear invented the process we call, vulcanization, in 1839. Before that, rubber was sticky stuff that got soft in heat and stiff in cold. Goodyear’s process gave us the tough rubber that we use in everything from tires to rubber boots rubber bands. Goodyear’s process was important, but the Mayans in Central America were probably the first to understand how to change latex into more useful forms. And they did it hundreds of years before Goodyear. Mayans mixed latex with juice from the morning glory plant and got rubber that they used for all sorts of stuff. Rubber balls. Rubber bands. Rubber sandals. 




"Rubber statues. Adhesives, glue.The interesting part of this is that each of these things uses a different kind of rubber. Bouncy for balls. Tough for sandals. Sticky for adhesives. What they got depended on how much of morning glory juice they added to the raw liquid latex. But they did it and it worked.We’ve done it for today and it’s time to bounce out of here. See you next time."

Wednesday, September 8, 2010

SWALLOWING DIAMONDS COULD FIND WHAT'S AILING YOU


THE GIST

  • Swallowing nanodiamonds could someday to help diagnose disease.
  • Plain nanodiamonds coat the digestive tract, coated nanodiamonds could target other organs and tissues.
  • Nanodiamonds have been proven to be nontoxic and safe in animal tests.   



Scientists from Taiwan have developed nanodiamonds that, when swallowed, harmlessly coat the digestive track. When coated with special sugars or proteins, the nanodiamonds are absorbed into the body and attach themselves to specific cells.
The research, which is currently limited to animals, could eventually diagnose and eventually treat diseases in humans.
"This research work demonstrates that nanodiamonds are non-toxic in both cellular and organismic levels," said Yi-Chun Wu, a scientist who, along with Huan-Cheng Chang and their colleagues in Taiwan, co-authored a new study in the journalACS Nano Letters.
Nanodiamonds are tiny pieces of pure carbon only a few of nanometers across. (One nanometer is about 100,000 times smaller than a human hair.) Most nanodiamonds are formed by blowing up TNT or other explosives to create high temperate and high pressures that bond carbon atoms together in a classic 3D diamond nanostructure.
These nanodiamonds are not solid, however. Inside those tiny structures are tiny holes, called vacancies, where a nitrogen atom from the air has replaced two carbon atoms. Nitrogen vacancies in diamonds are common. Natural diamonds with lots of nitrogen have a yellow tint to them. The nanodiamonds the scientists from Taiwan used absorb yellow light and emit violet light.
Next, the scientists fed two types of nanodiamonds to the round worm C. elegans. The first batch of nanodiamonds were uncoated, just pure carbon with a few nitrogen atoms. Those nanodiamonds coated the digestive tract of the transparent roundworm.
The second batch of nanodiaonds the roundworms ate were coated with a special sugar. Once inside the roundworm, the nanodiamonds passed through the digestive tract and into the body of the worm, congregating at various points inside the body.
Both the coated and uncoated nanodiamonds glowed purple when yellow light was shined onto the roundworms, revealing their location inside the worm. All the bejeweled worms had normal lifespans, and none of them showed any sign of distress, said the scientists.
The scientists fed the nanodiamonds to the worms just to measure their toxicity and to see where the diamonds ended up. More specific functions will come soon though, said Vadym Mochalin, a scientist at Drexel University who uses nanodiamonds in his own research.
Virtually any kind of protein or chemical can coat nanodiamonds. When placed into the body, those coated nanodiamonds could seek out and attach themselves to cancer cells, immune cells, pathogens and other cells.

At first, coated and glowing nanodiamonds will likely help doctors and scientists find and map cancers and other things that harm humans. After that nanodiamonds will likely be used to deliver low doses of powerful drugs to help treat those diseases.
Some researchers are most excited about using nanodiamonds to track stem cells.
"One of the most exciting applications of [fluorescent nanodiamonds] in humans is the long-term imaging, tracking, and sorting of human stem cells," said Chang.
Those stem cells could jump-start immune responses, help repair nerve damage, and potentially even regenerate entire organs if the research pans out. Those kinds of advanced therapies are still years, if not decades away however, caution scientists. But this research, along with dozens of other papers and groups working with nanodiamonds, opens the door for powerful therapies in the future.
"The nanodiamond looks very promising compared with other carbon-based nanoparticles," said Mochalin. "It's the least toxic carbon-based nanomaterial to date."
 

Can blind person drive a car? : Car for the blind!



As crazy as this may sound, it is now close to becoming a reality. Because we are blessed with so many other senses other than vision, it is possible to give cues to blind drivers in how to react to specific situations when they are behind the wheel. The car for the blind will do this by using an array of vibrating and voice warnings that are triggered by the reaction of sensors (made up of lasers). The driver will wear a vest and gloves that will vibrate depending on various factors. The steering wheel will also vibrate. The driver will be able to interact with the car via voice commands and touch.



Whilst it may be easy to dismiss the idea as nothing short of insanity, the vehicle itself is the result of a lot of research. Because humans do not specifically rely on a single sense to drive, it is fair to assume that someone who is blind is not at a massive disadvantage in regards to operating a vehicle. Nissan has been developing systems that will force the user to slow down and even apply the brake if a driver is too close to a vehicle in front of them. It is the conglomeration of technology such as this as well as others that has made the feat possible.

Whilst an advanced prototype is still in development a very basic prototype has been developed in the form of a beach buggy. The beach buggy used a wide variety of aids to help a blind person test the vehicle with a great deal of success.  

"The next prototype (much more advanced than the buggy) is to be tested in January, 2011. "
 Instead of a beach buggy, it will be a Ford Escape. A large vehicle that is quite common to give the broadest results possible.














The next prototype (much more advanced than the buggy)

is to be tested in January, 2011.

Saturday, September 4, 2010

New ipod from apple ! with Apple TV !

Apple's new iPod Nano, one of several new products announced Wednesday.
Apple's new iPod Nano, one of several new products announced Wednesday.
(Credit: Apple)



Apple rolls out new iPods, social iTunes


There were few surprises at Apple's annual music event Wednesday, but as usual there are new iPods for the holiday season and a new version of Apple TV.
Here's a quick recap of what Apple CEO Steve Jobs announced Wednesday in San Francisco. Check here for a replay of our live coverage of the event from earlier in the day.
• Apple released a new version of iOS--iOS 4.1--that fixes bugs and brings the previously announced Game Center API for developers to use in building social-networking games. Also, iOS 4.2 will be released later this year, which will unify the software on iPhones and iPads as well as stream music to other devices over Wi-Fi.
• Three new iPods were announced: an iPod Shuffle that ditches the previous no-button style in returning to a more classic look; a smaller iPod Nano that now has a touch screen but can no longer play video; and a thinner iPod Touch that has most of the features first introduced on theiPhone 4. The new iPods will be available next week.
• Apple announced iTunes 10, available immediately, which comes with a new logo and a social music service called Ping that lets you see what your friends are listening to and make comments and recommendations.
• A much cheaper and smaller Apple TV will ship later this month as Apple tries to revive interest in what Jobs has long called "a hobby." It will cost $99, and users can rent HD TV shows from iTunes as well as other partners, such as ABC and Fox. They can also access Netflix's streaming service from the box.


Thursday, August 26, 2010

10 new technologies that will revolutionise your life !

Staying up to date with everything that's going on in PCs and tech is almost impossible, so these are the ten technologies that you should be most aware of, as they're the ones that'll make the biggest difference to your life.
1. 3D gaming
The fact that to get any kind of 3D image from a 2D screen means wearing a pair of sunglasses or worse means that three dimensional gaming isn't quite as convincing as multitouch and natural user interfaces, even though the two have been commoditised at almost the same time.
An Acer Aspire 5738 laptop with a 3D display costs about £550 at the moment, not bad for something with cutting edge technology that adds depth to any DirectX 9 game. The screen is of the polarised filter type, which is the new norm for extra dimensions.


Instead of using coloured filters splitting an image into two – one for each eye – the vertical pixel columns are alternated between left image and right image and shone through a piece of polarised glass. A pair of dark glasses with oppositely polarised lenses ensures that only one image is seen by each eye. The difference to a game is tangible too, something like WoW runs and looks incredible on the low-end graphics hardware.
It's over in TV land that the real push for 3D is happening, though, as LCD suppliers ask us to upgrade again to watch hyper-real cinema in the lounge. Compared to the other technologies we've talked about here, though, 3D requires a lot of effort on behalf of the watcher (those pesky glasses) and most of us are very lazy; hence the ubiquity of MP3 and standard definition movies, while Blu-ray and higher resolution sound standards continue to flounder. We value ease of use over quality every time.

In its favour, 3D doesn't actually require any work on behalf of games developers or publishers, as the stereoscopic image is created at the driver level. On the other hand, that means there's no massive push by the people who make and sell games to encourage us to adopt it.
2. Streaming games
The advancements in superfast broadband hasn't just helped the cause of downloadable games. It will also have no some small impact on the future of streaming games over broadband, or at least that's the theory.
There are several companies pursuing and a significant amount of money invested in the idea that one day, your precious PC will be almost entirely redundant as a games machine.
The concept is simple: all the game's data is hosted on a central server and all you will have to do is receive the display and send back input commands. It's a little like the technology used for MMORPGs, except that the rendering engine isn't on your PC, it's actually in the same server farm as the core intelligence.
This idea was actually mooted some years ago with the Phantom console, which never made it to the stores. It's looking unlikely that OnLive (www. onlive.com), Gaikai and Microsoft's own streaming project will end up as vapourware though, despite the obvious concerns about input lag: the delay that occurs every time you press a key. The signal has to travel hundreds of miles before a character even moves.
Proponents say that even twitch gaming FPS games are possible but we're a little more sceptical. There's another reason that at least one of these services will be properly launched soon, and that's vested interest by games publishers.
Because no content is stored on your machine, of course, it's impossible to pirate a streamed game, which is obviously an attractive proposition for them. In the immediate future, though, it is more likely to be a technology that runs like games such as Quake Live, which use a combination of some local processing power and some server-based cycles. That's certainly the route Microsoft is taking, and seems more achievable than relying on 'the cloud' at this stage.
3. Six-core processors
You won't have to wait long for this one. Intel's Westmere CPUs may be hanging around with the dregs of processor society at the moment, chucking their chips in with the integrated graphics crowd, but they're about to grow up – and fast.
Sometime over the next few months Intel will go two better than the current line up of quad-core CPUs by launching a six-core version of its high-end Core i7 line. Based on the existing Nehalem architecture, the headline feature is a process shrink down to 32nm, while the rest of the spec sheet remains largely the same. It could be a genuine upgrade.

Games programmers are getting much better at working with multithreaded code so that most major titles, like Empire: Total War and its forthcoming sequel Napoleon, will see a much bigger performance increase when given extra cores to play around in than the often sporadic leaps in frame rate we saw going from two to four cores.
Because the benefits will be in the amount of cores, rather than the speed of things you can do at once, Intel are encouraging some developers to add extra content specifically for people with a six-core CPU. Given the plethora of disappointments we've had lately with almost every technology that's promised to increase our frame rates, we'll reserve judgement until we have one in the office.
The good news is that these hexa-powered processors will fit into most existing X58 motherboards after a simple BIOS flash. The bad news is X58 motherboards are still very expensive too.
4. Wireless power
A few years ago we saw a demonstration by a team at Fulton Innovation of a product called eCoupled. Using the principle of electromagnetic induction, by which an electrical charge can be stimulated in a wire coil by placing another one nearby, the crazy boffins were able to display wireless power transfer.
Despite being high voltage, they said, it was safe, efficient and could be applied to any surface. The demo room consisted of a kitchen without plugs, but full of lights that could be stuck anywhere and a frying pan that heated up just by sitting it on the counter. Put a phone on the same counter and it began charging. Clearly, this was the future.


Fulton are still working on wireless power, but it's a different company that's beat it to the shops, Powermat – and its products are expensive for something that replaces a 50p mains plug.
The good news is that the Wireless Power Consortium are going to be finalising a standard for wireless power called Qi later this year, which should mean prices drop and manufacturers have the confidence to build the technology straight into devices, rather than requiring an adaptor.
If you think that's crazy, though, take a look at Airnergy by RCA. It's a tiny dongle that can turn Wi-Fi signals back into electricity for charging phone batteries and the like.
5. Wireless displays
The last two standards for monitors, HDMI and DisplayPort, didn't exactly have us all rushing out to upgrade our PC screens and graphics cards, so it's a safe bet that DVI will remain the cabled interface of choice for some time to come. What about connecting a monitor to your PC without wires though?
That's something that could be worth shelling out for. Two different technologies were on the show floor at CES, which should be available en masse this year.
The first, WirelessHD is being pushed by the usual line-up of TV and DVD player manufacturers as a replacement for HDMI. It uses a short range, high bandwidth in the Ultra-Wide Band (UWB) spectrum to transmit HD video and audio from a set-top box or media centre to a TV screen.
The idea is nothing new, Philips have had a kit out for a while that does the same thing, but WirelessHD is a proper standard and should ensure maker A's TV works nicely with maker B's Blu-ray machine and so on.
Perhaps more relevant for us, though, is Intel's new Wireless Display, or WiDi. It's designed specifically for laptops in order to remove the hassle of cables when you want to dock them with a proper screen, and like WirelessHD sends the video signal to a receiver box.
Unlike WirelessHD, WiDi can't handle protected content and the like, but it is much simpler since it requires no new hardware inside the laptop. Instead of using a separate transmitter, WiDi is a software layer on top of the existing Wi-Fi chip, so it's much cheaper to produce. Providing there's no latency introduced to the picture refresh rate, this could be a killer.


6. OLED displays
Yeah, we hear you. Another year, another promise that OLED screens are going to take over. Haven't we heard it all before? Except this time it could be true.
Google's Nexus phone has just launched with an OLED screen, and by all accounts it makes the handset almost – say it in hushed tones – more desirable than the iPhone. Brighter colours, sharper resolutions, darker blacks, whiter whites; why is this OLED technology so superior?
Put simply, it's because instead of filtering the light from a white or blue lamp behind the screen, each pixel in an OLED panel produces its own light. You don't have to be an optometrist to see why this is better, but it is much more expensive to produce.
Still, it also means OLED screens are much thinner than backlit ones, for obvious reasons, and while you may not be using an OLED PC monitor by the end of the year there are a lot more laptops with the technology arriving.
7. Superfast broadband
There are two things about broadband you should be concerned about. The first is whether or not the Digital Britain report, with its three strikes policy, outrageous invasion of privacy and extra charging for bandwidth, makes it into law before the general election final hits.
The second is what's going on at your exchange. By early next year, 75 per cent of us should be living in proximity to a telephone exchange that has a fibre optic connection to the internet. It's all part of BT's 21CN project to replace the entire copper telephone and broadband internet infrastructure with a single ethernet-based network fit for the 21st century.

So far, it's been dogged by delays and problems, but it's finally picking up the pace and is being tested by ISPs all over the country. The idea is that it will increase competition for high-speed broadband and bring down access prices, as well as bring services like IPTV – of the sort Virgin customers enjoy – to everyone.

It doesn't just mean better access to large downloadable game files and lower ping times, however. Our biggest hope is that it will eventually encourage telephone companies to do away with the irritating £12 a month line rental charge for a phone we don't actually use.
8. Augmented reality
Actually, we're kidding ourselves with this one. Augmented reality: the ability to overlay information on a live video feed of the world, is very cool, and it's impossible not to love iPhone apps like Yelp that pull in details and distances to the nearest pub or restaurants as you point the camera in their general direction.
Holding your phone three inches in front of your face as you're walking around feels a little too ridiculous to catch on, though. Perhaps it's like handsfree and Bluetooth headsets. Not so long ago people still sniggered if they saw someone using a phone without holding it to their ear, and not so long before that mobile phones themselves were devices for sales dorks.
Augmented reality
In a couple of years time, it may seem the most natural thing in the world to see someone walking around with a phone held at arms length, directing them to food or drink with their own personal dynamic GPS system, or pulling up interesting information about the buildings and people in front of them. Yes, that's right, people.
Twitter 360 is an iPhone app that directs you to geotagged tweeters on your friends list, while TAT (www.tat.se) is working on an Augmented ID program, so if people point a camera at you various bits of information from your social feeds floating around your head. Makes stalking a lot easier then. Scary.
9. Natural user interface
In his CES keynote presentation, Steve Ballmer made several references to the 'Natural User Interface' (NUI), which is a handy catch all to describe all the Wii wand-waving, multitouch point and Project Natal-style aerobics that are catching headlines out there.
The keyboard and mouse is by no means dead, but the sudden flood of cheap laptops and all-in-ones with a built-in, multitouch screen suggests that it won't be long before we'll all have something a little bit different on our desktops.
Over in the US, for example, custom laptop maker IBuyPower has already started selling high-end gaming notebooks with a multitouch screen, and French developer, Eugen Systems has incorporated Win7's multitouch controls into the heart of its forthcoming strategy title R.U.S.E. It's all very exciting, except for one thing.
Multitouch may be native to Win7 and no other operating system, but the implementation is nowhere near as smooth as it is on, say, the iPhone. PCFormat has yet to use a multitouch application on a PC that doesn't suffer from a bit of inaccuracy or sluggishness, and the key to the NUI is in the first word. It has to feel natural, unforced and invisible to the end user. That's what using multitouch on an iPhone is like, and that's what Windows must achieve. If the mouse remains faster and more trusted, that's what people will use.
There are some brilliant ideas out there, though. Project Natal, Microsoft's full body 3D gesture recognition system for Xbox 360, is by far the most ambitious prototype, and we can't wait for a PC hack.
At CES the prototype Light Touch projector, from Light Blue Optics (lightblueoptics.com), was a show stealer. Using a technique called holographic laser projection, this tiny projector turns any 10inch surface – flat or curved - into a sharp multitouch screen.
10. Long-term evolution
The idea of getting high speed, super-reliable mobile broadband from a cell tower to your laptop or phone via WiMAX is not quite dead in the water, but it's certainly in need of a bit of mouth to mouth.
Far from being the 'Next Big Thing' as it was touted a few years back, it's had a painful and traumatic incubation period, which has seen some US carriers begin to adopt it and, in fact, quite a few businesses use it for point to point communications, but public access has dwindled from trial areas to almost nothing.
Partly, this may be because the company which owns the licence to operate WiMAX licences in several cities, Freedom4, was recently bought out and the new owners aren't in any rush to monetise the technology. More likely, it's because the mobile phone companies are happy with the current HSPDA speeds and are betting on an alternative technology, which is known as 4G, or Long Term Evolution (LTE) to supply almost the same amount of bandwidth without completely reworking their networks for WiMAX.
Lucky Scandinavians living in Stockholm or Oslo with a TeliaSonera contract can already sign up for LTE, while O2 is planning on launching a 150Mbps LTE package in the UK some time this year. We don't expect WiMAX to give up without a serious fight, though.
In the US, mobile networks are beginning to fall over because of the volume of 3G traffic running over them, and WiMAX's new architecture could well be a way to increase capacity to cope with demand. In which case, expect to see it begin sprouting up everywhere.
Faster bits and bytes
Rather more prosaic than the technologies listed elsewhere in this article the internals of your PC are also being overhauled by the powers that be. There's a revision to the SATA standard out for disk drives, and USB 3.0 is appearing on motherboards to speed up the default peripheral connection.
They are big steps forward. SATA III doubles the bandwidth available to storage from a theoretical 3Gbps to 6Gbps, while on paper USB 3.0 is a ten-fold increase from 480Mbps to 4.8Gbps for cabled peripherals.
motherboardsMotherboards sporting ports of both flavours are already available from most manufacturers. Although both technologies are much faster than their predecessors, neither is likely to have a huge impact on consumer PCs.
In the world of business where milliseconds are money, the upgrades may mean something, but for the likes of us, compatible drives and peripherals will be a while coming yet.


Sunday, August 22, 2010

latest in nanotechnology !!


The asbestos of tomorrow? As we wrote in our article last year at The Scientist, that's not the type of frame device that augurs well for public perceptions of nanotechnology. But it's exactly the perceptual lens by which the New York Times covers a new study appearing this week at Nature Nanotechnology. As Kenneth Chang opens the article, setting the train of thought for readers:
Nanotubes, one of the wonder materials of the new age of nanotechnology, may carry a health risk similar to that of asbestos, a wonder material of an earlier age that turned into a scourge after decades of use when its fibers were found to cause lung disease, researchers said Tuesday.
NanotechFly.jpg
The asbestos comparison immediately places nanotechnology in the mental box of uncertainty and risky health impacts. For several years, consumer advocates have used asbestos as a familiar historical example to anchor interpretations of nanotech, but now this advocacy package has been given resonance by a study appearing this week in the journal Nature Nanotechnology. From the NY Times article:

A team of researchers reported that injecting nanotubes into the abdomens of mice induced lesions similar to those that appear on the outer lining of the lungs after the inhalation of asbestos...When foreign particles like smoke or dust land in the lungs, cells known as macrophages engulf the particles and clear them away. Some asbestos fibers are too long for the macrophages to handle, resulting in lesions. The researchers hypothesized that nanotubes would cause similar problems if they were long, but not if they were short or tangled into a ball...The mice injected with the short nanotubes or small carbon clumps did not develop disease. Those injected with long nanotubes or asbestos developed lesions on the tissue lining.
In its coverage, the LA Times ran this headline: "NANOTECHNOLOGY CANCER RISK FOUND." Alan Zarembo reinforces the frame of reference in his lede paragraps to the article:

Certain types of carbon nanotubes -- microscopic graphite cylinders used in a small but growing number of Space Age applications -- could pose a cancer risk similar to that of asbestos if inhaled, scientists reported Tuesday. Researchers found that mice injected with nanotubes quickly developed the same biological damage associated with early exposure to asbestos fibers, a known carcinogen. The study showed "the potential to cause harm if these things get into the air and into the lungs," said coauthor Andrew Maynard, a physicist at the Woodrow Wilson International Center for Scholars in Washington.

Shifting frames in coverage of nanotechnology also appeared yesterday at Canada's paper of record. As the Globe and Mail reports, the Canadian Institute for Environmental Law and Policy is pushing a focus on the public accountability dimensions of the technology. Emphasizing a regulatory vacuum, the advocacy group released a report this week calling for nanomaterials to be banned in foods and packaging, and for mandatory labeling in cosmetics, personal-care products and cleaning agents.(from scienceblogs.com)
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