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Showing posts with label cpu. Show all posts
Showing posts with label cpu. Show all posts

Sunday, September 12, 2010

Want to print in 3 dimensions?

  • The process is similar to an inkjet printer, however, the "ink" is powder and a bonding agent.
 
  •  Printing in layers, the machine builds up the object in three dimensions.

 Some of the gadgets engineers come up with are just cool. We’re going to check out one of them. Printing in three-dimensions. Today, on Engineering Works!

 
Most of us have home computers these days, and they’re all connected to desktop printers. Hit the print key and out comes that report you needed for work or a barbecue sauce recipe from the web. Easy.

 
That was then. "Now, a new kind of printer is taking printing into three-dimensions, not just flat on a piece of paper. These printers print out solid objects, usually in plastic. There aren’t many of the printers around yet. Technology geeks and hobbyists own most of them. They use them to make stuff like jewelry, toys, tools or kitchen appliances."

Tonight Show host and classic car collector Jay Leno even has one. His mechanics use it to print out car parts that they can’t buy any longer. They send the plastic models to machine shops to get real metal parts made, cheaper and faster than custom-designed parts.

 
The 3-D printers are starting to catch on. You can buy them in some electronics stores or directly from the manufacturers. Prices run from $750 for a desktop kit model to $27,000 for Leno’s refrigerator-sized unit. So far, it’s definitely a niche device, but enthusiasts are sure that someday we’ll be printing out things we need, not just fun stuff.

 
We can’t print out a ride home, but we’re still done. See you next time.

Engineering Works! is made possible by Texas A&M Engineering and produced by KAMU-FM in College Station. Learn more about engineering. Visit us on the World Wide Web. http://engineeringworks.tamu.edu    

Friday, September 10, 2010

Next after 3G: 4G Technology

Fourth Generation (4G) mobiles

4G also called as Fourth-Generation Communications System, is a term used to describe the next step in wireless communications. A 4G system can provide a comprehensive IP solution where voice, data and streamed multimedia can be provided to users on an "Anytime, Anywhere" basis. The data transfer rates are also much higher than previous generations.

The main objectives of 4G are:


1)4G will be a fully IP-based integrated system.

2)This will be capable of providing 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors.

3)It can provide premium quality and high security.

4)4G offer all types of services at an affordable cost.

4G is developed to provide high quality of service (QoS) and rate requirements set by forthcoming applications such as wireless broadband access, Multimedia Messaging, Video Chat, Mobile TV, High definition TV content, DVB, minimal service like voice and data, and other streaming services.

4G technology allow high-quality smooth video transmission. It will enable fast downloading of full-length songs or music pieces in real time.

The business and popularity of 4Gmobiles is predicted to be very vast. On an average, by 2009, this 4Gmobile market will be over $400B and it will dominate the wireless communications, and its converged system will replace most conventional wireless infrastructure.

Data Rates For 4G:


The downloading speed for mobile Internet connections is from 9.6 kbit/s for 2G cellular at present. However, in actual use the data rates are usually slower, especially in crowded areas, or when there is congestion in network.

4G mobile data transmission rates are planned to be up to 20 megabits per second which means that it will be about 10-20 times faster than standard ASDL services.

In terms of connection seeds, 4G will be about 200 times faster than present 2G mobile data rates, and about 10 times faster than 3G broadband mobile. 3G data rates are currently 2Mbit/sec, which is very fast compared to 2G's 9.6Kbit/sec.

Sunday, August 29, 2010

Intel, AMD vie to rewire PC's brain


Intel and AMD are off to the races again. This time it's about making PCs not just faster, but more versatile.
The two longstanding PC chip rivals seem to agree, roughly, on one thing: the need to meld the two key PC chips, the central and graphics processing units, into one processor. But they both bring different strengths to achieve that end.
Why combine chips? Put simply, it takes less energy to move electrons across a chip than to move those same electrons between two chips, so this saves energy, resulting in better battery life for laptops. A point made by Insight 64 principal analyst Nathan Brookwood in a white paper written for AMD, but which, in some fundamental respects, applies equally to Intel.
Heterogeneous computing combines functions typically found on a graphics processor with the main CPU chip.
Heterogeneous computing combines functions typically found on a graphics processor with the main CPU chip.
(Credit: AMD)
And CPUs and GPUs are suited to different kinds of computing. CPUs can handle a broad array of tasks, while GPUs are more specialized but much faster at certain types of operations. Future heterogeneous chips could find photos and videos in your library that contain particular faces or places. Or recognize your face when you log in. In short, putting both capabilities on one piece of silicon creates a brainier chip with more processing brawn.
The question, of course, is which company will deliver the goods and drive cutting-edge PC--particularly laptop--designs in 2011? AMD claims that because it is also a supplier of GPUs, via its ATI graphics chip unit, its products are more forward-looking because of the increased emphasis on graphics that tap into key multimedia technologies like Microsoft's DirectX and Apple's OpenCL.
"Intel is understandably more CPU centric. That's Intel's view," said John Taylor, director of marketing for Fusion at AMD. "We're a provider (via ATI) of graphics chips. We're incorporating world-class GPU intellectual property into a new type of design. We look at the GPU in a consumer notebook as a very efficient compute engine as well as all of the wonderful 2D and 3D graphics capabilities," Taylor said, adding that Intel is just "sprinkling" low-level graphics on its CPUs.
Not surprisingly, Intel, the world's largest chipmaker, believes it has the upper hand because its cutting-edge manufacturing technology allows it to integrate more on a piece of silicon, sooner. Intel's Atom chip, for example, already melds two processing cores and the graphics function on a single piece of silicon.
And Intel was the first--early this year--to move to 32-nanometer technology, which allows the chipmaker to cram more functions onto the chip. (Globalfoundries, AMD's manufacturing partner, won't make that move until 2011.) The upcoming 32-nanometer Sandy Bridge architecture from Intel will represent the fruition of this effort. "Sandy Bridge combines multiple cores together with the graphics circuitry on the same chip," said Mark Bohr, Intel senior fellow. "The fact that we're an aggregate device manufacturer allows us to do internal optimization of all of these pieces and bring out a leading-edge product sooner than other companies."
So, here's a brief overview of laptop-centric technologies that AMD and Intel are planning to roll out over the next 6 to 12 months or so. Consumers, of course, will ultimately decide who prevails.
AMD's Ontario (2010): 
  • From-the-ground-up redesign; very-low-power x86 core 
  • Single piece of silicon 
  • Up to two CPU cores with a DirectX 11 ATI 5000 series GPU technology and new video decoder 
  • Targeted at Netbook, ultrathin laptops, and all-in-one PCs 
  • 40-nanometer "bulk" process; manufactured by TSMC*
  • Due to ship in Q4 2010 with laptops due early 2011 
*Taiwan Semiconductor Manufacturing Company
AMD's Llano (2011): 
  • Up to four CPU cores with DirectX 11 GPU, upgraded ATI 5000 series GPU technology and video decoder 
  • Single piece of silicon 
  • Targeted at mainstream and ultrathin laptops and certain desktop market segments 
  • 32-nanometer High K metal gate process; manufactured by Globalfoundries 
  • Due to ship in first half of 2011 
Intel's Sandy Bridge
  • Single piece of silicon, combining CPU and GPU
  • Faster on-chip communication: different parts talk via "improved inter-buses."
  • Improvements to the way instructions are executed 
  • New instructions to accelerate multimedia: Intel Advanced Vector Extension (AVX) instructions. 
  • Improved Turbo Boost: slowing down, speeding up individual cores as needed. 
  • Special circuits for handling transcoding (conversion of video/audio from one format to another) 
  • 32-nanometer High K metal gate process 
  • Due to ship in Q4 (more details to be revealed at the Intel Developer Forum in September). 
  • Up to 2 cores, 4 threads 
  • CPU integrates GPU on the same die (single piece of silicon) 
  • Low-power: dual-core version has maximum thermal envelope of 8.5 watts 
  • Shipment date: now 
A few additional items worth noting:
High K metal: Intel has been building chips--since 2007-- with this transistor technology, which, generally yields chips that are faster and run cooler. AMD won't move to this technology until 2011.
32-nanometer: Intel has also been supplying 32-nanometer chips since early this year; AMD won't get there until 2011 but it is moving to an intermediate 40-nanometer process later this year.
AMD's "Bulldozer" core: This is a new 32-nanometer chip architecture due in the first half of 2011. Targeted initially at high-end desktop and servers, it will offer multi-threading, which increases the number of tasks a processing core can handle (Intel has been offering this for a long time). Bulldozer will yield high core counts (such as 8-core desktop chips) and support new x86 instructions, including SSE4.2 and AVX.

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.


Tuesday, August 24, 2010

How WiFi Works ?

If you've been in an airport, coffee shop, library or hotel recently, chances are you've been right in the middle of a wireless network. Many people also use wireless networking, also called WiFi or 802.11 networking, to connect their computers at home, and some cities are trying to use the technology to provide free or low-cost Internet access to residents. In the near future, wireless networking may become so widespread that you can access the Internet just about anywhere at any time, without using wires.
 

                               WiFi has a lot of advantages. Wireless networks are easy to set up and inexpensive. They're also unobtrusive -- unless you're on the lookout for a place to use your laptop, you may not even notice when you're in a hotspot. In this article, we'll look at the technology that allows information to travel over the air. We'll also review what it takes to create a wireless network in your home.

A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication. Here's what happens:
  1. A computer's wireless adapter translates data into a radio signal and transmits it using an antenna.
  2. A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernetconnection.
The process also works in reverse, with the router receiving information from the Internet, translating it into a radio signal and sending it to the computer's wireless adapter.
The radios used for WiFi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s. But WiFi radios have a few notable differences from other radios:






  • They transmit at frequencies of 2.4 GHz or 5 GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.
  • They use 802.11 networking standards, which come in several flavors:
    • 802.11a transmits at 5 GHz and can move up to 54 megabits of data per second. It also uses orthogonal frequency-division multiplexing(OFDM), a more efficient coding technique that splits that radio signal into several sub-signals before they reach a receiver. This greatly reduces interference.
    • 802.11b is the slowest and least expensive standard. For a while, its cost made it popular, but now it's becoming less common as faster standards become less expensive. 802.11b transmits in the 2.4 GHz frequency band of the radio spectrum. It can handle up to 11 megabits of data per second, and it uses complementary code keying (CCK) modulation to improve speeds.
    • 802.11g transmits at 2.4 GHz like 802.11b, but it's a lot faster -- it can handle up to 54 megabits of data per second. 802.11g is faster because it uses the same OFDM coding as 802.11a.
    • 802.11n is the newest standard that is widely available. This standard significantly improves speed and range. For instance, although 802.11g theoretically moves 54 megabits of data per second, it only achieves real-world speeds of about 24 megabits of data per second because of network congestion. 802.11n, however, reportedly can achieve speeds as high as 140 megabits per second. The standard is currently in draft form -- the Institute of Electrical and Electronics Engineers (IEEE) plans to formally ratify 802.11n by the end of 2009.(by howstuffworks)

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