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Comment Re:The sign of the failure of particle physics (Score 2, Insightful) 338

Yeah, it's worse than that -- many of the structural elements are made of steel, smelted, cast, and machined using processes that go back even further than Diesel.

OMG y dont we kill these jiants insted of stand on there sholdiers!

If you think that's bad, the guys using the LHC are Homo Sapiens. That's like 200000 years old, it should be run by iPhones, or something...

Comment Re:Creative X-Fi (Score 1) 267

Yes

The latest version of Linux offers a whole host of new features – for example a USB 3.0 infrastructure, drivers for the Sound Blaster X-Fi, KMS support for Radeon chips and improved versions of Btrfs and Ext4. As is traditional with new Linux versions in the main development branch, however, this is only the tip of the iceberg.

Comment Re:It's very sad (Score 1) 183

RTFA, they test them but they're not hardened:

Whenever we go to select a laptop for flying, we have a certification process to determine the best ones. We'll test it for how well it withstands radiation. [The ISS is exposed to as much radiation in a day as computers down on Earth are in a year.] We also test for off-gassing, in case the computer emits chemicals that could create fumes on the Station.
You'd be surprised at how many computers would survive on the ISS. I can't think of an occurrence when we've have a computer fail from the radiation itself. It may reduce the lifetime of how long we can keep the equipment in orbit, but most of the time the failures are just like the ones here on the ground -- we'll have a hard-drive failure or we'll have an application problem and end up reloading the machine

Comment Re:Issues with such networks generalize to Mars (Score 1) 183

"The delay in sending or receiving data from Mars takes between three-and-a-half to 20 minutes at the speed of light. "

How are they coming up with that? I thought it was closer to 90 minutes...

I may be wrong, but I think they divided the minimum and the maximum distance between the Earth and Mars by the speed of light...

Comment Re:No quite yet. (Score 1) 356

Mach 1 at the throat is calculated as sqrt(gamma*R*T) where T is in kelvin if R=287. Gamma will most likely be 1.4 and is pretty constant for ideal gases. T can vary greatly, but 3000K is around the right order of magnitude.

Uh? R=287 is true for air, with 29 g/mol, with pure water, it's 462, and more for the mixture of water and hydrogen that comes out of the nozzle.

Comment Re:No quite yet. (Score 1) 356

It's Mach 1 in the exhaust. But even if the flow won't go at more than Mach 1, the speed of sound is proportionnal to the square root of the temperature, so even if the Mach number is fixed at the throat, you can have a faster flow if you can get a hotter gas.

Of course the problem is that with any rocket engine, the gas are already hot enough to melt the nozzle: I've worked on Vulcain 2 and the nozzle is cooled with liquid hydrogen at 20K... I guess other rocket engines use similar solutions.

Comment Re:Huh? (Score 1) 307

It can run a root shell, but the manufacturer and carrier, together, can't add items to the interface? What, is the firmware burned into ROM or something? Obviously I'm missing something here, since I thought Maemo was quite customizable.

For carriers, customizing means "shoving our shit down the customer's throat", and Nokia plans to give full control of the N900 to the customer, not the carrier.

Comment Re:What is the advantage... (Score 4, Informative) 550

...24 hours of sun...

Maybe my geography or astronomy are off - Feel free to correct/bitch-slap me if I'm confused.

How does a satellite in geosynchronous orbit get 24-hours/day of sunlight?

/bitch-slap

The equator and the ecliptic are not on the same plane, which means the only times when a geosynchronous satellite is in eclipse is around the equinoxes. In the worst case it can last up to 80 minutes of shadow.

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