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HD-DVD format approved

16.03.2004

Advocates of the new HD-DVD (High Definition and High Density-DVD) optical media format may be celebrating an intermediate victory. Although it is still very far from a complete and universal transition to disks of this standard, a serious step in this direction has been made.

At the recent meeting of the DVD Forum participants in Tokyo, the HD-DVD standard (the capacity of such a disc is 20 GB) was officially approved. Recall that Toshiba and NEC, which are in a clear minority compared to another alliance promoting Blu-ray optical media, are at the origins of this format.

This format allows you to write 25 GB of data to disk, but requires a serious retooling of production. By the way, the matter is not limited to these two standards. Sony, despite participating in the Blu-ray alliance, is developing its own standard for professional optical discs, which are still called Professional Disc. They are supposed to be used on television.

In addition, the English company Plasmon PLC is also making moves in a similar direction. Its engineers are busy creating an optical disc UDO (Ultra Density Optical), whose task will be to store data in various kinds of library archives (as an alternative to magneto-optics).

All four listed formats are in no way compatible with each other, so let the strongest win.

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Random news from the Archive

Inflatable steel structures 20.06.2021

A design team from Poland and Switzerland has perfected a method for creating inflatable steel furniture that has revolutionized wind energy and construction. Designers - architect Oskar Zieta and materials scientist at the Swiss Federal Institute of Technology Philippe Domain - created the engineering method as a way to make steel products lighter and less expensive without sacrificing strength.

This technology, called free internal pressure deformation (FiDU), requires laser cutting of steel sheets that are precisely shaped with an accuracy of plus or minus 0,1 mm. These 1mm thick high strength steel sheets are then robot welded for maximum manufacturing precision.

The three-legged Plopp stools designed by Zieta are produced as rolled tubes from a thin sheet of steel. They can then be inflated with a simple valve to create a strong, lightweight and stylish seat. Thanks to the inherent strength of steel and innovative FiDU technology, the award-winning Plopp chair can withstand a load of more than two tons.

Since the compressed air pressure only needs to be 0,1-50 bar, furniture made using this method can even be inflated with a bicycle pump. Unlike existing hydroforming methods used in the automotive sector, FiDU does not rely on a mold to form the steel during inflation, so it can be done even at home.

This means that the metal will deform as it inflates according to its natural characteristics, making the individual contours of each piece unique, even if they are all of the same design.

While the concept of flat furniture has changed the face of interior shopping forever, the FiDU method offers even more convenience with less weight. Transporting even flat packing furniture takes up a lot of space, but uninflated Plopp stools take up almost no space compared to fully formed items. This leads to a significant reduction in transport-related costs and emissions.

Designers see the possibilities of inflatable steel going far beyond furniture. Thanks to the team's experience in architecture, they were successful in building a small bridge using an inflatable steel structure.

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