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Comment: Re:nice hack (Score 2) 647

by mkramer (#38390544) Attached to: US Sentinel Drone Fooled Into Landing With GPS Spoofing

P(Y) is still significantly more accurate than C/A, and having access to both L1* and L2P allows the receiver to do ionospheric correction, improving the accuracy even further.

Still, I'm not aware of anyone who has successfully spoofed P-code (though it's been a few years since I worked directly on GPS), so I suspect you're right that this drone was operating only on L1C, which is rather simple to spoof. Especially given that a less-than-perfect spoof of P-code, if even possible, should have been easily detected by an inertial guidance system.

News

Armed Man Takes Hostages At Discovery Channel HQ 1090

Posted by samzenpus
from the man-vs-channel dept.
An anonymous reader writes "The manifesto of the man holding the Discovery Channel hostage with a bomb has been released. He has fired shots and taken hostages. His main complaints are about overpopulation, religion and civilization. He wants them to avoid encouraging people to produce more 'disgusting human babies,' to get people to accept 'Malthus-Darwin science,' reject civilization and its 'disgusting religious-cultural roots,' and to stop 'ALL immigration pollution.'" The man has now been shot by police, and the hostages have been freed.
PC Games (Games)

An Early Look At Civilization V 286

Posted by Soulskill
from the new-and-shiny dept.
c0mpliant writes "IGN and Gamespot have each released a preview of the recently announced and eagerly awaited Civilization V. Apart from the obvious new hexagon shape of tiles and improved graphics, the articles go on to outline some of the major changes in the game, such as updated AI, new 'flavors' to world leaders, and a potentially game-changing, one-unit-per-tile system. No more will the stack of doom come to your city's doorsteps. Some features which will not be returning are religion and espionage. The removal of these two have sparked a frenzy of discussion on fan-related forums."

Comment: Re:I'm not sure COCOMO is a good measure (Score 1) 289

by mkramer (#31262010) Attached to: The Billion Dollar Kernel

If you notice in the article, that's why there is a whole order-of-magnitude difference between the basic and the parameterized COCOMO estimations.

Using the parameterized models, you're able to describe a lot of the complexities that set kernel-programming apart.

Now, whether or not they're enough is a whole other topic, but the model DOES try to account for such differences. I have a feeling that the real-life-projects they used to generate their parameter coefficients included very few OSes.

It would be interesting to make a ceiling calculation of ACTUAL development time for the Linux kernel (something like, for each month of the kernel's life, the number of developers who submitted patches * 1MM). Would that at all approach the COCOMO number?

Comment: Re:What is the difference (Score 1) 292

by mkramer (#30757854) Attached to: Porn Industry Tiptoes Into 3D Video

The problem is that the left-eye and right-eye imagines need to be separated. Unlike the the clumsy old red & blue method, both eye's images cannot exist in the same source image. Current systems use a *physical* difference between the two perspectives, whether it's polarity (common in theater systems) or timing (common in TV systems).

So the difference between 2D and 3D TVs is that the 3D TV must be able to make a physical difference between the two perspectivesThe most common system for this in 3D TVs now is to double the TV's refresh rate (to 120Hz), and alternate showing left eye then right-eye images. The viewer then has special shutter glasses, which are synchronized with the TV. They work by blocking the right eye when the left-eye image is displayed, and block the left-eye when the right-eye image is displayed.

Other technology, which is more costly on the TV side, but doesn't require such fancy glasses, is for the TV to interleave scan lines with different polarities. Then left-eye images are displayed only on the lines which are polarized one direction, while the right-eye images are displays only on the lines polarized the other direction. Then the viewer just needs the same, simple, polarized glasses as used in the movie theaters. But the image will effectively be half the resolution of the TV.

Games

Palm Pre and WebOS Get Native Gaming 49

Posted by Soulskill
from the break-out-your-rocket-launcher dept.
rboatright writes "WebOS developers have been waiting, and with the 1.3.5 release, Palm's open source page suddenly listed SDL. Members of the WebOS internals team took that as a challenge and within 24 hours had a working port of Doom running in SDL on the Pre, in a webOS card. 48 hours later, they not only had Quake running, but had found in the latest LunaSysMgr the requirements to launch a native app from the webOS app launcher from an icon just like any other app. At the same time, the team demonstrated openGL apps running. With full native code support, with I/O available via SDL, developers now have a preview into Palm's future intent with regard to native code SDK's, and a hint of what's coming."

Comment: Re:$11M v $42M, before anyone asks... (Score 1) 102

by mkramer (#29277415) Attached to: Military to Spend $42M To Build Advanced Network Control

This is DARPA... It's been a LONG time since they've ever actually paid for development through final production.

Their strategy is to pay for initial technology development and proofs of concept, and then encourage (and probably help) to find a government customer who actually wants a product based on those technologies.

So the timeframe for a real product winds up being much longer. And the final bill to the taxpayers, much higher.

Comment: Re:What's the point? (Score 1) 289

by mkramer (#29094923) Attached to: TomTom Releases iPhone Navigation App

The A-GPS used by the 2G is subpar to true GPS.

The 3G and 3GS HAVE true GPS that maybe be operated standalone or assisted. Its accuracy is equal to most any other handheld GPS unit, and the assisted portion allows faster time-to-fix than standard products.

Which the 3G is missing that makes turn-by-turn difficult is a compass. Most turn-by-turn devices have a digital compass, which allows detecting that you've completed a turn an instaneous result. Without a compass, one has to depend on consecutive positioning calculations to detect that you are indeed moving in a different direction now (accumulating enough readings in the new direction to rule out precision error).

The 3GS DOES have the digital compass.

However, even in the 2G and 3G, one could use the accelerometer to confirm a turn. It requires using more than just CoreLocation in the apple SDK, but it's entirely doable and just as reliable an indicator as a digital compass.

I don't know if TomTom uses this approach in non-3GS devices or not, though. Some other apps do.

Comment: Re:Come on GM, at least make the lie BELIEVABLE (Score 1) 1006

by mkramer (#29029769) Attached to: Chevy Volt Rated At 230 mpg In the City

The conversion has absolutely nothing to do with cost of energy. They're calculating the amount of energy (measured in energy density units of gallons of gasoline) required to move the vehicle.

Basically, they're claiming the car requires 146Wh/mi for the somewhat arbitrary commute distance selected by the EPA. ((33705Wh/g)/(146Wh/mi)) = 230mpg (equivalent).

Granted, that works out to around 6kWh for a 40 mile commute.

Vax Vobiscum

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