föstudagur, 28. september 2007

Microsoft Exel fell a stærðfræðiprofi


Microsoft Corp.'s Excel 2007 spreadsheet program is going to have to relearn part of its multiplication table.

In a blog post, Microsoft employee David Gainer said that when computer users tried to get Excel 2007 to multiply some pairs of numbers and the result was 65,535, Excel would incorrectly display 100,000 as the answer.

Gainer said Excel makes mistakes multiplying 77.1 by 850, 10.2 by 6,425 and 20.4 by 3,212.5, but the program appears to be able to handle 16,383.75 times 4.

"Further testing showed a similar phenomenon with 65,536 as well," Gainer wrote Tuesday.

He said Excel was actually performing the calculations correctly, but when it comes time to show the answer on the screen, it messes up.

Gainer said the bug is limited to six numbers from 65,534.99999999995 to 65,535, and six numbers from 65,535.99999999995 to 65,536, and that Microsoft is working hard to fix the problem.

föstudagur, 21. september 2007

Intel með nyjungar


Intel has unveiled an initiative that aims to cut the power consumption of Linux servers.

The Less Watts programme will provide tips on decreasing the power usage for Linux systems, and will coordinate with developers working on future kernel enhancements to lower Linux power consumption.

Intel unveiled the project at the Intel Developer Forum in San Francisco on 20 September.

The project brings several existing projects under a single umbrella, such as the 'tickless idle' technology that allows Linux to utilise power technologies built into hardware.

Another component, Intel's PowerTOP, allows laptop users to monitor the power consumption of their Linux system. It lets them pinpoint processes that prevent the processor from going into a more energy efficient mode.

The Linux Foundation, which counts Intel as a backer, launched its Green Linux initiative earlier this year which has similar goals to LessWatts.

Intel and the Linux Foundation were unable to provide background information on how the two programmes will function in time for this story's publication.

laugardagur, 15. september 2007

Nytt UFS flash minni fyrir gsm sima


Several mobile phone technology companies began a collaborative effort this week to create a flash memory standard for mobile phones and other consumer electronic devices.
Micron Technology (MU), Nokia (NOK), Samsung Electronics, Sony Ericsson, Spansion, STMicroelectronics, and Texas Instruments (TXN) said they will support the development of an industry specification called Universal Flash Storage (UFS) for removable memory cards and embedded memory technologies.

The standard, which will eliminate the need for adaptors to accommodate various removable memory card sizes, is being developed by the JEDEC Solid State Technology Association, an organization that creates open standards in the semiconductor industry.

Once UFS is finalized in 2009, users will be able to get a unified removable memory card that can be shared among mobile phones, digital cameras, and other electronic devices without adaptors.

"The proposed UFS specification is good news to card manufacturers and set designers alike. The proliferating use of flash memory as a storage medium underscores the importance of introducing a universal connectivity to memory cards where high performance and reliability are critical," said Jon Kang, Samsung's president, in a statement.

The growing popularity of multimedia content and the demand for higher performance devices that can handle such content have created the need for flash memory storage, such as removable cards, and embedded formats.

UFS promises to offer high-speed access to large multimedia files, while consuming less power in consumer electronic devices. UFS's performance is expected to be much higher than is offered today by flash cards. For example, with the new standard, instead of experiencing a three-minute access time for a 90-minute, 4 Gigabyte high-definition movie, users would only wait a few seconds.

heimild:http://www.informationweek.com/

fimmtudagur, 6. september 2007

Ný myndavél frá Sony

is adding a mid-range model to its Alpha digital still camera range later this year in anticipation of a competitive year-end shopping season.

The Alpha 700 is a mid-range model with a higher feature set that Sony's Alpha 100, which launched in July last year as Sony's first single lens reflex camera. It was unveiled on Thursday at a Tokyo news conference.

Single-lens reflex cameras use a mirror placed between the lens and the film or image sensor to project the image to the camera's viewfinder. The mirror moves out of the way when the picture is taken. They typically support interchangeable lenses and are faster and more capable than smaller point-and-shoot cameras.

The camera is based around a 12-megapixel CMOS image sensor that Sony has dubbed "Exmor." The sensor is newly developed and will work in combination with Sony's "Bionz" image processing engine inside the camera, said Sony.

In addition to the high-resolution images, the camera is also capable of shooting at up to 5 frames per second in full resolution. The only limit on the number of shots that can be taken at this speed is the space left on the camera's CompactFlash or MemoryStick card.

An unusual feature on the A700 is an HDMI (high definition multimedia interface) connector. More typically found on high-definition video devices, the HDMI connector allows the camera to be directly connected to a high-definition television for viewing of images. New model Bravia televisions can automatically detect the A700 when it's connected and switch the TV to a mode tuned for the display of still images. That means a better picture than normal, according to Sony.

At the rear of the camera the 230,000 pixel monitor screen of the A100 has been replaced with a display that has four times the resolution. The 920,000 pixel screen also has higher contrast. Images displayed on demonstration A700 cameras at the news conference were bright and clear.

The camera will form part of Sony's line-up going into the year-end sales period. DSLR cameras have become more and more popular of the last couple of years as prices have come down and more manufacturers entered the market. A few years ago the market was virtually divided between Nikon Corp. and Canon Inc. but the entry of companies like Sony and Matsushita Electric Industrial Co. Ltd. (Panasonic) has pushed up competition.

The market for more feature-rich DSLR cameras is also growing. Whereas entry-level models, like Sony's A100, accounted for about three quarters of the Japanese DSLR market in the first half of this year that is expected to shrink to about two thirds of the market this year-end period, according to estimates from Sony. The A700 is targeted at this growing mid- and high-range sector.

The DSLR-A700 will cost around %180,000 (US$1,555) in Japan and be available from Nov. 16. It will be available in October in the U.S. market and cost about US$1,400. A version bundled with a 18-70mm lens will also ship in October for US$1,500 and a version with a 16-105mm lens will be available a month later for US$1,900. European launch details have not been announced.

mánudagur, 3. september 2007

A Program that Unlocks the iPhone?

According to reports, an anonymous group of software developers claims to have developed a program that unlocks Apple's iPhone, thus making it operational on any GSM network across the globe.

As of now, the iPhone is available only in the US, and is operational only on the AT&T network, under an exclusive two-year agreement between Apple and AT&T.
The iPhone unlocking program was demonstrated by Los Angeles-based software consultant named Brett Schulte, who replaced AT&T with a T-Mobile SIM card, and within a few seconds, the iPhone became operational.

Schulte said the procedure doesn't require opening or disassembling of the device, and unlocking can be done in just about two minutes.

Apparently, the anonymous group includes six people from three different continents, who claim to have unlocked the device just as a hobby.

The developers plan to put the software on sale, though no price has been finalized yet. They have also created a Web site called iPhoneSIMfree.com, which has some information on the program but does not give a way to purchase it yet.

Meanwhile, an AT&T spokesman said that though they could not hypothesize on the authenticity of hacking the iPhone, they hurried to remind users that by buying the iPhone, they become contractually indebted to AT&T.

A similar incident took place about a week back, where a teenager claimed to have found the way to unlock the iPhone, though by disassembling the device.

tekið af síðunni 3.sept http://news.google.com/nwshp?tab=wn&ned=us&topic=t

Prufa i tæknigat

Góðan daginn, Þetta er smá prufa í námskeiðinu nám og störf í rafmagnsverkfræði. Hér verða skrifaðir pislar, um ýmis tæknileg málefni,rannsóknir, og fl