Archive for June, 2010

Cheap laser toners

June 30th, 2010

Just like everything else, if you keep your computer nice and taken care of, it’s going to last longer. There are many things that you need to do with your computer hardware that will extend it’s life and help it perform better. Learn what steps you need to take that will make your machine have a longer life.

The first thing to do for proper maintenance is to dust your machine from time to time. Dust is a problem because in many computer’s it will get inside on the components and block the vents.

This is not good for your machine. Get a can of compressed air and use it to dust out your computer. This is best done when the computer is not plugged in and is detached from the battery.

Heat is the biggest killer of most hardware. Dusting your computer will help it cool off more efficiently and stay cooler. Take extra precautions to make sure you keep the computer cool.

For a laptop be sure to get a cooler pad if the computer runs a bit hot. With your desktop don’t make the huge mistake of pushing your computer against the wall completely. This blocks the vents and adds extra heat.

Be sure that you shut down your computer properly. While you might think this is just a software issue, it’s actually related to hardware. When the computer is suddenly shut off, the internal components can have problems. Always do your best to go through a normal shut down.

Transport your machine carefully. If you are taking your computer from place to place, especially a laptop, get a bag that protects and fits the computer so there is limited shaking which can impact hardware performance especially a hard drive.

Always make sure you are plugged into a power strip. This is the best thing you can do to maintain your hardware long term. One power surge can ruin your computer completely.

Source:http://www.booshnews.com/2010/06/30/cheap-laser-toners/

Quantum computer simulation new world record on jugene

June 30th, 2010

The civil engineer Konrad Zuse was born in Berlin exactly 100 years ago. In 1941, he built the world’s first computer. And thanks to his pioneering work, the scientists at the Jülich Supercomputing Center have now succeeded in setting a world record by simulating the largest quantum computer system with 42 qubits. As yet, only small prototypes of quantum computers exist in laboratories, with a capacity of a few bits. This is now going to change.

Compared to the so-called quantum computers, today’s supercomputers would simply look old. A new project is aiming to catapult these impressive machines out of the realm of the hypothetical and into reality, or at least to raise the hope that such computers will not just be sketches on paper.

Low value, large effect

To understand the extent of the accomplishment, you have to grasp the underlying principle of a quantum system. “The computing power of a quantum computer grows exponentially with its size,” says Prof. Dr. Kristel Michielsen from the Jülich Supercomputing Center, and who heads the Institute for Advanced Simulation. “If a quantum computer is expanded by just one single computer bit, its computing power is immediately doubled due to the laws of quantum mechanics on which it is based.”

By contrast, the computing power of a classical computer only grows linearly with its components. Ten percent more transistors only means ten percent more performance, at best.

The qubit is still the smallest unit for quantum computers; however, they offer quite different possibilities. While the traditional 8-bit byte can represent 256 different values, quantum bytes have over 65,535 independent states. For computational operations, quantum computers use atoms and subatomic particles as transmission units.

They are both the memory and the executing computational unit. This property would allow such a computer to perform computational operations simultaneously, to take on highly scientific tasks, and to control the cand decryption of data streams.

This last function is already no longer a secret in the world of cryptography. Since Phil Zimmermann placed his PGP encryption on the Internet with free access for everyone in 1991, anyone can easily encrypt their data stream. This cryptographic undertaking is naturally a thorn in the side of intelligence agencies because terrorists are also able to use it.

JUGENE: Europe’s fastest supercomputer

Of course, if you want to simulate a quantum computer using a traditional computer, you soon run up against limitations. For a 42-qubit simulation, you need machines like the Jülich supercomputer. JUGENE is the fastest computer in Europe with almost 300,000 processors and a computing power of one quadrillion floating point operations per second.

One billion people would each have to perform one million calculations per second on a calculator to get anywhere near as fast as that. On this machine, scientists succeeded in running Shor’s algorithm, one of the most common test applications for quantum computers, with 42 computer bits factorizing 15,707 into 113×139.

“The simulation can now factorize numbers that are about a thousand times larger than those previously possible with experimental quantum computers,” says Michielsen proudly.

The simulation was built by enhancing existing software. When so many processors work together, it may easily be the case that threads are waiting for each other, leading to performance loss.

The Jülich software is optimized to allow thousands of processors to work together seamlessly. Codes like this are able to scale almost perfectly. Scaling is the term computer scientists use to describe the property of software such that it is able to convert processors into computational performance in a linear manner.

Jülich is also at the heart of the QPACE project (QCD Parallel Computing on the Cell). In the future, the supercomputer center will come into even “greater consideration” for larger projects involving several research institutes.

An international consortium consisting of six German and Italian universities and research centers plans to calculate simulations in quantum chromodynamics (QCD), a field of elementary physics. QCD describes how protons are built up of quarks and gluons.

The work in this field can also help increase the understanding of the the fundamental forces of the universe. Here too, IBM, or more precisely IBM’s research and development center in Böblingen, Germany, is also supporting the prototype of a research computer that can handle such simulations.

Jülich’s red carpet

The QPACE concept consists of a network of programmable components, the so-called “field programmable gate arrays” (FPGAs) that connect processors to a powerful, scalable research computer.

The prototype is intended to reach a maximum performance of up to 200 teraflops. Due to the scalability of the network employed, it is theoretically possible to increase the performance up into the petaflop range.

But quantum physics is not only an issue at Jülich. Quantum research has long since been an international business. It was the Danes who, as it were, rolled out Jülich’s red carpet in 2008. Dr. Henrik Ingerslev Jørgensen from the Niels Bohr Institute in Copenhagen succeeded in getting qubits to interact with each other.

His results gave the first glimpse into understanding the interaction of two electrons lying next to each other in carbon nanotubes, which are tiny tubes made up of graphite layers.

A glance into the future

“Quantum computers are still a fascinating vision — nothing more,” says Michael Malms, head of High Performance Computing at the German IBM research and development center in Böblingen. “But if we look at the technical evolution that has been successful in a relatively short time in the area of high performance computing and project that into the future, then we cannot exclude the possibility that quantum computers too will one day become a reality.”

No doubt Konrad Zuse would be amazed if he were able to look at the cutting edge of computing research today. And it’s not just quantum computing. Scientists at the Weizmann Institute of Science in Rehovot in Israel are conducting research into the possibility of using synthetic genetic “snippets” as software. Enzymes that read, split and join DNA form the hardware.

Then based on the aggregate number of such “computers,” they are able to parallelize computations.

About three trillion such molecular computers are packed into a drop of water, and since they work simultaneously, they can theoretically perform 66 billion operations per drop. Zuse would have loved to hear this “pitter-pattering” of computing.

Source:http://www.hpcwire.com/features/Quantum-Computer-Simulation-New-World-Record-on-JUGENE-97350939.html

Windows 8 check the web leak

June 30th, 2010

While in Redmond have prolonged the festivities for the new mark of 150 million licenses sold for Windows 7, Internet demonstrated once again that it can be ruthless when dealing with leaked information. This time it deals with some forms considered ‘confidential’ by Microsoft, which also mentioned several details about what the future will be Windows 8.

Until now, information is available on Windows 8 has been very limited, and rightfully so. Windows 7 has just completed eight months on the market, and already has sold 150 million licenses, becoming the fastest operating system has been sold in history. The comparison of “seven copies per second” that makes Microsoft seem exaggerated, but in reality is not so well.

Have recently appeared online about Microsoft internal spreadsheets in which I highlight several details of what will be Windows in August. In its multimedia support, found via webcam facial recognition, support for AVC HD, 3D video, and several of the formats based on MPEG-4. As expected, H.264 is on the list, like MPEG-2, and the eternal Windows Media Video. I

t will also seek to move away from conventional TV tuners, providing better support Web solutions available. Another significant point is the ability to completely reinstall Windows without losing personal information.

This will require a major factor modularity in the operating system, besides being associated with something that is mentioned in various schedules: Windows Store. It appears that Microsoft will seek to introduce a sales channel and download similar applications that Apple has for their mobile devices.

The schedules are over fifty, but not all are directly related to Windows 8. Some of them are talking about Internet Explorer 9, confirming the first beta for next August.

Then we found an important reference to Apple, which is studying its “just works” in their products, highlighting how the user experience helps people recognize the “value” of a specific product (just tested with success the iPhone, which caused a viral reaction from those who bought early adopters to the rest of consumers).

And finally, we should mention something very striking: The “Computer Windows 8. It appears that this is a concept rejected during the development of Windows 7, but there is in these forms, indicating the possibility that Microsoft would develop its own computer with Windows as the operating system in August.

The entrance to the hardware market would be a radical change in the policies of Redmond, but as it leaked information, we must take with a pinch of salt. The big question in these cases, what happened to the guy who leaked these templates

Source:http://www.livestreetjournal.net/technology/windows-8-check-the-web-leak.html

Cisco entering tablet market with android-based device

June 30th, 2010

Cisco announced today the Cius, an Android-based seven-inch tablet computer aimed at the enterprise. The device will feature both front and rear-facing cameras, Cisco TelePresence-compatible video conferencing and access to applications such as Cisco Quad, WebEx and AnyConnect Security VPN Client, as well as access to the Android app store. The launch further diversifies Cisco’s offerings.

The device will weigh 1.15 pounds and feature Wi-Fi, 3G/4G data, Bluetooth, and HD audio and video. In addition to its phone-like docking station, the Cius will support Bluetooth keyboards and mice. Cisco says the tablet will be available for customer trials Q3 2010, followed by general availability Q1 2011.

Cisco has been diversifying its product line beyond networking equipment in recent years, and this tablet complements the company’s cloud computing, collaboration and conferencing initiatives.

Cisco has been selling VoIP and video-conferencing hardware for some years now, and entered the consumer video market with its Flip Video acquisition last year, but this is the first time the company has offered its own computing device.

Cisco also announced a partnership today with MobileAccess to provide in-building cellular coverage over an organization’s existing network infrastructure, a sensible additional service for enabling mobile video conferencing.

Enterprises are very interested in the iPad, and Cisco is already offering WebEx for the iPad. Although Cisco is new to the space, it has a trusted name and brings a different, video-focused spin to tablet computing that could help break tablets into the mainstream.

By using Android, Cisco is able to tap an existing developer base and take advantage of Android’s slowly evolving enterprise features. Cisco’s support for Android could also help the adoption rate of the OS in the enterprise.

Source:http://www.readwriteweb.com/enterprise/2010/06/cisco-entering-tablet-market.php

The achilles’ heel of your computer

June 30th, 2010

Computers often need to be connected to printers, cameras, and USB flash drives and other hardware, but the small pieces of software that enable communications with these peripherals, known as “device drivers,” have a bad reputation.

Experts believe that device driver failures are responsible for about 85 percent of crashes on Windows machines, and poorly written device drivers can also introduce security holes on an otherwise protected computer.

Part of the problem is that a device driver can’t easily be examined by anyone outside the company that created it.

“Device drivers are terrible,” says Vitaly Chipounov, a researcher in the Dependable Systems Lab at the Ecole Polytechnique Federale de Lausanne (EPFL) in Switzerland. At the Usenix Annual Technical Conference in Boston last week, Chipounov demonstrated a software tool that could help protect computers from dodgy drivers by identifying problems before they reach a user’s system.

Chipounov’s tool can test device drivers without requiring access to the underlying code. It works by loading a driver into a virtual computer and simulating its behavior, checking for problems like sudden freezes or crashes. The tool works without communicating with a corresponding real piece of hardware.

Even so, by simulating the way that hardware interacts with the driver, it can show how a driver will respond when connected to buggy piece of equipment. Once the tool finds a problem, it can provide information about the cause, which can help identify a fix.

The researchers worked with six popular device drivers written for Windows, and they found 14 serious bugs. Some of the drivers they tested had been certified as compatible with Windows by Microsoft.

The researchers say this shows that their tool could make the certification of device drivers better. Their experiments revealed a pattern in the way some related drivers failed, which suggests that the hardware vendors responsible may have copied code from one buggy device driver to another.

“At least they should copy and paste code that works,” Chipounov jokes.

The stability and security of device drivers is an important problem, says Vinod Ganapathy, an assistant professor of computer science at Rutgers University.

On Linux, Mac, and Windows computers, device drivers are typically given the same privileges as the operating system itself, he says. Many of these drivers are written by third-party vendors, and do not undergo the same level of testing as the operating system.

Some device drivers posted to the Web are modified to contain malicious code.

“Malicious device drivers can perform a variety of nefarious activities, such as hiding the presence of malicious programs and snooping on networking traffic,” says Ganapathy.

“Benign-but-vulnerable device drivers also pose similar risks, because an attacker can hijack vulnerabilities to perform the same kinds of malicious activities.”

Other researchers are working on different ways of making device drivers more secure. Ganapathy and Michael Swift at the University of Wisconsin-Madison, for example, have developed ways to implement drivers so that they are isolated from the core of the operating system.

The EPFL researchers want to empower users to test drivers themselves. The current version of their tool requires a lot of technical expertise, so it’s only suitable for use by hardware or software vendors who might use it to debug or certify drivers.

But the researchers’ vision is for end users to be able to determine whether to install a driver or not.

They say the tool could be added to an operating system. It could automatically present the user with a “Test Now” button for new drivers, letting them check for problems before they occur.

Source:http://www.technologyreview.in/computing/25676/

How to properly maintain computer hardware

June 30th, 2010

When it comes to buying printer ink, it’s natural to balk a little thinking about the cost. Such a reaction is not entirely unjustified because, let’s face it, printer ink is expensive. Especially if you insist on buying original or OEM ink cartridges, the costs can easily match some of the printers they are intended for.

A new rising trend, however, is that of buying compatible or generic refill cartridges, even refilled ones. Buying these cartridges makes a lot of sense as these are usually a lot cheaper than OEM cartridges yet deliver the same brilliant performance as them, sometimes even going beyond that! Gone are the days of leaking cartridges or smudgy prints. These days refilled cartridges use high quality ink that produce the same vibrant colors and crisp black texts as brand new cartridges.

And to top it all, you can add printer ink coupons for extra savings on your printer ink costs! Yes Virginia, there is a Santa Claus! If ink coupons that let you save even more (sometimes up to 20% or more) on the already very affordable generic ink supplies sound like too good to be true, think again.

The trick is to find them at the right time. So where do you for these fabulous yet elusive printer ink coupons? Simple, just go online. The Internet, just like so many other things in life, is a great place to find big discount coupons on ink supplies, cartridges, toners and more. Forget the Yellow Pages or running about from store to store in search of the best deals.

No matter what kind of a printer you may be using, be it Lexmark, Brother, Canon, Xerox, Hewlett Packard or Epson – there’s always a compatible cartridge available. Most online sellers would throw in extra offers on them in the form of attractive ink coupons and once you combine them with their low wholesale rates, you’d be cutting down your printer costs like never before.

If your business requires you to print often, this is a great way to bring down printing costs without sacrificing on the quality. Most reputed refill cartridge dealers will offer you guarantee on their recycled products for your complete peace of mind.

So are you ready to save big and shop smart with printer ink coupons? Point your browser to the website and enjoy hefty savings on printer ink supplies.

Source:http://www.booshnews.com/2010/06/30/how-to-properly-maintain-computer-hardware/

Suit over faulty computers highlights Dell’s decline

June 30th, 2010

After the math department at the University of Texas noticed some of its Dell computers failing, Dell examined the machines. The company came up with an unusual reason for the computers’ demise: the school had overtaxed the machines by making them perform difficult math calculations.

Dell, however, had actually sent the university, in Austin, desktop PCs riddled with faulty electrical components that were leaking chemicals and causing the malfunctions. Dell sold millions of these computers from 2003 to 2005 to major companies like Wal-Mart and Wells Fargo, institutions like the Mayo Clinic and small businesses.

“The funny thing was that every one of them went bad at the same time,” said Greg Barry, the president of PointSolve, a technology services company near Philadelphia that had bought dozens. “It’s unheard-of, but Dell didn’t seem to recognize this as a problem at the time.”

Documents recently unsealed in a three-year-old lawsuit against Dell show that the company’s employees were actually aware that the computers were likely to break. Still, the employees tried to play down the problem to customers and allowed customers to rely on trouble-prone machines, putting their businesses at risk. Even the firm defending Dell in the lawsuit was affected when Dell balked at fixing 1,000 suspect computers, according to e-mail messages revealed in the dispute.

The documents chronicling the failure of the PCs also help explain the decline of one of America’s most celebrated and admired companies. Perhaps more than any other company, Dell fought to lower the price of computers.

Its “Dell model” became synonymous with efficiency, outsourcing, and tight inventories, and was taught at the Harvard Business School and other top-notch management schools as a paragon of business smarts and outthinking the competition.

“Dell, as a company, was the model everyone focused on 10 years ago,” said David Yoffie, a professor of international business administration at Harvard. “But when you combine missing a variety of shifts in the industry with management turmoil, it’s hard not to have the shine come off your reputation.”

For the last seven years, the company has been plagued by serious problems, including misreading the desires of its customers, poor customer service, suspect product quality and improper accounting.

Dell has tried to put those problems behind it. In 2005, it announced it was taking a $300 million charge related, in part, to fixing and replacing the troubled computers. Dell set aside $100 million this month to handle a potential settlement with the Securities and Exchange Commission over a five-year-old investigation into its books, which will most likely result in federal accusations of fraud and misconduct against the company’s founder, Michael Dell.

The problems affecting the Dell computers stemmed from an industrywide encounter with bad capacitors produced by Asian PC component suppliers. Capacitors are found on computer motherboards, playing a crucial role in the flow of current across the hardware. They are not meant to pop and leak fluid, but that is exactly what was happening earlier this decade, causing computers made by Dell, Hewlett-Packard, Apple, and others to break.

According to company memorandums and other documents recently unsealed in a civil case against Dell in Federal District Court in North Carolina, Dell appears to have suffered from the bad capacitors, made by a company called Nichicon, far more than its rivals. Internal documents show that Dell shipped at least 11.8 million computers from May 2003 to July 2005 that were at risk of failing because of the faulty components. These were Dell’s OptiPlex desktop computers–the company’s mainstream products sold to business and government customers.

A study by Dell found that OptiPlex computers affected by the bad capacitors were expected to cause problems up to 97 percent of the time over a three-year period, according to the lawsuit.

As complaints mounted, Dell hired a contractor to investigate the situation. According to a Dell filing in the lawsuit, which has not yet gone to trial, the contractor found that 10 times more computers were at risk of failing than Dell had estimated. Making problems worse, Dell replaced faulty motherboards with other faulty motherboards, according to the contractor’s findings.

But Dell employees went out of their way to conceal these problems. In one e-mail exchange between Dell customer support employees concerning computers at the Simpson Thacher & Bartlett law firm, a Dell worker states, “We need to avoid all language indicating the boards were bad or had ‘issues’ per our discussion this morning.”

In other documents about how to handle questions around the faulty OptiPlex systems, Dell salespeople were told, “Don’t bring this to customer’s attention proactively” and “Emphasize uncertainty.”

“They were fixing bad computers with bad computers and were misleading customers at the same time,” said Ira Winkler, a former computer analyst for the National Security Agency and a technology consultant. “They knew millions of computers would be out there causing inevitable damage and were not giving people an opportunity to fix that damage.”

Winkler served as the expert witness for Advanced Internet Technologies, which filed the lawsuit in 2007, saying that Dell had refused to take responsibility for 2,000 computers it sold AIT, an Internet services company. AIT said that it had lost millions of dollars in business as a result. Clarence Briggs, the chief executive of AIT, declined to comment on the lawsuit.

Some of the documents in the case that were sealed under a protective order became public this month. Those documents show that after AIT complained, Dell representatives looked at the failed computers and contended that AIT had driven many of the computers too hard in a hot, confined space. Dell’s sales representatives discussed trying to sell AIT more expensive computers as a resolution.

Jess Blackburn, a Dell spokesman, said the company would not comment on pending litigation. Lawyers for Dell deny AIT’s claims, and contend that AIT has cherrypicked and misinterpreted documents in the case. Dell’s lawyers wrote in a response to AIT: “There was a Nichicon problem, and it affected different customers in different ways.”

In addition to the charge, Dell extended its warranty on the systems and often replaced computers when customers complained. (In 2007, Dell restated its earnings for 2003 to 2006, as well as the first quarter of 2007, and lowered its sales and net income totals for that period. An audit revealed that Dell employees had manipulated financial results to meet growth targets.)

But, as Dell did not recall the computers, many of Dell’s OptiPlex customers may be unaware that they had problematic computers or realize why their computers broke. AIT says in court documents that the faulty capacitors touched off a variety of other problems that were often misdiagnosed. Dell could potentially face a raft of new complaints from some of its biggest customers.

Crucially, in their complaints to Dell in the lawsuit, customers describe losing valuable information when their computers malfunctioned. Dell, by contrast, denied that that the capacitor issue had caused data loss.

Dell’s supply chain had always stood out as one of its important assets. The company kept costs low by limiting its inventory and squeezing suppliers. If prices for components changed, Dell could react more quickly than its competitors, offering customers the latest parts at the lowest cost.

But the hundreds of Dell internal documents produced in the lawsuit show a company whose supply chain had collapsed as it failed to find working motherboards for its customers, including the firm representing Dell in the lawsuit, Alston & Bird.

According to a person who saw Dell’s 2005 internal communications, company executives carefully devised a public relations policy around the OptiPlex situation. Dell and Kevin Rollins, then Dell’s chief executive, were told that the news media would be informed of Dell’s commitment to fix any systems that failed, that Dell was working with customers to resolve problems in the most effective manner possible and that the problems posed no safety or data loss risk.

Carey Holzman, a computer expert who investigated the capacitor problems and collected photos from people with broken motherboards, had a different take on the safety situation. “Of course it’s dangerous,” Holzman said. “Having leaking capacitors is a huge problem.” He found that the capacitor problems could cause computers to catch fire.
As late as 2008, after Dell had replaced Rollins and returned as chief executive, Dell continued to circulate internal memorandums trying to deal with the fallout from the capacitor situation. Dell salespeople, according to the lawsuit, fretted that technology directors at companies who used to buy from Dell could “justify their job” by advising their companies of Dell’s PC failures and recommending the purchase of HP and Lenovo computers.

To counter such lingering bad impressions, Dell salespeople were told to emphasize that the company’s direct model allowed it to identify and fix problems faster than competitors.

Source:http://news.cnet.com/Suit-over-faulty-computers-highlights-Dells-decline/2100-1014_3-6250634.html

Get Adobe Flash playerPlugin by wpburn.com wordpress themes