Face on Mars Gets a Make-Over
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Going nowhere at the speed of light
The latest attempt to develop a stopped-rotor aircraft has been scrapped, with the US Defense Advanced Research Projects Agency (DARPA) withdrawing support for Boeing's canard rotor/wing (CRW) concept following the April loss of the second X-50A Dragonfly unmanned demonstrator.
The crash investigation has concluded that the aircraft was lost due to insufficient low-speed control authority. The crash of the first X-50, in March 2004, was caused by a cross-coupling control phenomenon. Neither vehicle had progressed beyond hover and low-speed manoeuvres in the brief flights completed before they crashed.
The CRW was intended to take off like a helicopter, transition to forward flight and stop the rotor, which would then act as a fixed wing. Investigators concluded the X-50's fuselage aerodynamic pitch moment was extremely sensitive to airspeed and wake strength. "At very low speeds, the rotor wake impact on the fuselage resulted in a strong pitch-up moment that used up the available control margin," says DARPA. As a result, the vehicle was unable to recover from an aerodynamic disturbance during its last flight.
Boeing is using remaining DARPA funds to complete a study later this year to "draw together final ideas on the potential of the stopped-rotor concept", says the agency. Stopped rotor has long been eyed as a potential high-speed rotorcraft configuration, but previous efforts have also failed to produce a viable design.
Italian aerospace research agency CIRA, meanwhile, is to invest in feasibility studies on a vertical take-off and landing flying car that would stop its rotor in forward flight and stow the rotor while on the road. An initial prototype may be completed by January and production vehicles could be flying in around six years, says CIRA.
The two-seat Aviocar would be built with the help of Italian propulsion company Avio, with development and preparation for production estimated to cost around €60 million ($76 million), according to CIRA president Sergio Vetrella.
After a vertical take-off the rotor would stop in flight to become a fixed wing, and the rotor would stow itself lengthwise when the vehicle was being driven on roads. CIRA says advanced navigation, control and communications technology would allow for the consistent and safe management of private traffic, both on the ground and in the air.
A tweaked version of Firefox that makes Web browsing anonymous has been released by a group of privacy-minded coders.
Every few minutes, the Torpark browser causes a computer's IP address to appear to change. IP addresses are numeric identifier given to computers on the Internet. The number can be used along with other data to potentially track down a user, as many Web sites keep track of IP addresses.
Hackers Promote Privacy
Torparks's creators, a group of computer security gurus and privacy experts named Hactivismo, said they want to expand privacy rights on the Internet as new technologies increasingly collect online data.
The browser is free to download at torpark.nfshost.com. It's a modified version of Portable Firefox, an optimized version of the browser that can be run off a USB memory stick on a computer.
The Torpark browser uses encryption to send data over The Onion Router, a worldwide network of servers nicknamed "Tor" set up to transfer data to one another in a random, obscure fashion.
Internet traffic, such as Web site requests, carries information on where it came from and where it's going. But that's muddled using Tor, which has been endorsed by the Electronic Frontier Foundation, and is hard to trace back to a source.
Encryption Still Important
One minor downside is that surfing with Torpark is slower than with a typical browser over the same connection.
Torpark cautions that data sent from the last Tor server to the Web site is encrypted. Since only the user's connection is anonymous, Torpark advises that sensitive data such as username and passwords should only be used when the browser displays a golden padlock, a sign that a Web site is using encryption.
Torpark's user interface appears similar to Firefox with a few changes. It shows the current IP address that would be seen by Web sites in the lower right hand corner, and features a special "Flush Tor" button to reset a new, random server connection.
A test of Torpark using a computer in London employed IP addresses of servers registered in Berlin and Madison, Wisconsin.
Download:
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Still Samsung's latest SSD drive offering creates large potential for a "platform shift", representing marked benefits for the mobile enthusiasts and space conservatives among us. Keep your eye out for the integration of these Flash drives and consider their advantages when making your next upgrade decision.
As a stand-alone purchase it would wise to utilize the fast file access as a location for your operating system and swap files, and distribute file/system access between existing drives. Integrated features of the drive also let users easily take advantage of Vista's new ReadyBoost/Superfetch features. The power consumption and physical sturdiness of the unit indicate strong inclinations toward mobile use and should allow for the manufacture of products with longer battery life, increased durability and reduced weight as well as decreasing boot times. Non-volatile, large capacity Flash based SSD is a fantastic idea whose time has almost come.
Zune's digital rights management (DRM) scheme will not add its own DRM to unprotected files, Ars Technica has learned. Trusted sources tell us that Zune's wireless sharing feature, which requires Zune's DRM to function, will only monitor the presence of shared songs for the purposes of controlling playback. Files themselves will not be modified, either on the player or on a local PC.
We also learned that users cannot share files that they have received by sharing. That is, if Eric shares his favorite song, Cotton Eye Joe, to Nate, Nate's stuck with it. He cannot share it to anyone else, and once his 3 plays/3 days are over, his options are to expunge the song or purchase a new copy (with DRM) from the Zune Marketplace. The Zune player itself will simply monitor the age of the song (on the device) and how many times it has been played, and prevent playback when the limits have been reached.
Many questions remain about Zune's sharing features. How did Microsoft arrive at this 3x3 sharing limitation, and were the music labels involved? Are there additional limits on the service? Is this sharing business built-in to the Zune Marketplace's pricing? For now, however, we'll have to be content knowing that Zune's DRM is not viral, which alleviates many questions but does not eliminate the unfortunate fact that this otherwise interesting feature is crippled.
The poll also found that many Americans have no idea what net neutrality is, or why they should care; only 7 percent said that they had even heard or seen anything about net neutrality. When pollsters introduced the concept to poll takers, they described it solely as "enhancing Internet neutrality by barring high speed internet providers from offering specialized services like faster speed and increased security for a fee." When presented this way, 19 percent of respondents said that net neutrality was more important to them than "delivering the benefits of new TV and video choice," which received a 66 percent backing.
Most studios have already picked a side in the HD DVD / Blu-ray war, but for the few still contemplating a near suicidal attempt at a simultaneous DVD, HD DVD and Blu-ray release, there's help on the way. A pair of Warner engineers have been working on a way to get all three formats to hold hands on a single disc, and have recently filed a patent to that effect. This is made possible by the fact that Blu-ray uses a 405nm laser to read its 0.1mm deep info layer, while HD DVD uses the same blue laser wavelength at the depth of 0.6mm. The hybrid disc works by making the Blu-ray layer act like a two way mirror, reflecting enough light for Blu-ray playback, but letting enough light through for HD DVD operation. As for DVD, that layer can be found on the flip side of the disc. Of course, the new format will cost more to produce than your standard next-gen disc, and we're not quite sure this isn't all madness to begin with, but we suppose we'll have to play the game if we don't want to end up buying every title in triplicate.
TDK has followed Samsung and launched a hard drive replacement based on NAND Flash memory. The product, which is currently available in sample quantities, was announced by the company last week.
The 32GB unit hooks up to the host across a standard IDE connector, but it's about 80 per cent of the size of a standard 2.5in notebook drive - the part's an obvious choice for battery powered systems since it consumes less power than a standard HDD. The unit's controller supports data transfer rates of up to 33.3MBps, the manufacturer said.
Samung launched its 32GB Flash-based "solid-state disk" in March this year. It's pitching the technology as a both a faster and a lower power system than traditional HDD technology.
TDK said it was sampling the drive to storage companies. There's no indication when the part will ship commercially - or how much it's likely to cost. ®
To the uninitiated, HD DVD’s future looked brighter than ever earlier this week with the news that it gained backwards compatibility with a layer that will be playable in existing DVD players.
Unveiled by Toshiba and Memory-Tech, a triple-layer HD DVD/DVD medium could have, in theory, been enough to topple its competing, next-generation optical format, Blu-ray. As a result, many people are already claiming Blu-ray is dead.
This is about where I laugh intensely and pull the forgotten rabbit out of the hat. Some of you may wish to sit down for this.
Blu-ray can already do this.
Needless to say, a hybrid is exactly what is needed to encourage migration to a new format. Such a system would no doubt prove popular to most consumers.