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Comment Re:good (Score 1) 238

I suspect the problem is that you also associate e-mail addresses with your iMessages. If someone sends to your e-mail address instead of your phone number, it can't fall back to SMS. I don't know why it would say "Delivered"--and I suspect it doesn't. But the problem in this case would be the sender not using the phone number to try to send the message.

Comment Re:640k isn't enough for everybody (Score 1) 522

That's how it used to be.

And it's how it still is, except the memory manager handles it all transparently for you in the background, so you can simply mmap() in a file, which can even exceed your total physical RAM many times over, and the system takes care of reading / writing & mapping the pages to / from disk as necessary. All that's changed is transparent support for it in hardware and the amount of memory involved.

Comment Re:Help! Help! (Score 1) 865

If you want to know why it's not really called the 'emergency brake', try using it at speed. Attempting to use the handbrake (parking brake, etc. etc.) to stop from speed will almost certainly make your situation a lot worse.

Comment Re:Help! Help! (Score 1) 865

As for traction control, if you can't drive a vehicle safely WITHOUT it, you shouldn't be driving.

As soon as the engine is off and not producing torque, you won't be needing it anyway. Turning the engine off is kinda the ultimate traction control.

Comment Re:Help! Help! (Score 1) 865

I'm picking you actually both know what each other is talking about are just being disingenuous (yay nerds!). For the benefit of others:
Cars with manual transmissions have one clutch, which is actuated by the driver.
Traditional automatic transmissions use multiple clutches, but these are instead actuated automatically by the transmissions control system.
Anything that allows the engine to be disconnected/reconnected to the drive train in some way is by definition a clutch.

Comment Re:Efficiency? (Score 4, Informative) 234

The conventional piston-and-crankshaft engine forces the variation of cylinder volume over time to follow a specific sinusoidal curve. This is not the most efficient way to convert the energy of a hot expanding gas to motion. Look at the third picture in the slideshow to see the power-over-time graph of the free piston engine to get an idea of how differently this engine runs.

This fundamental difference in thermodynamic cycle performance makes the biggest improvement to the efficiency of this engine. It more than makes up for the inherent inefficiencies in converting the mechanical motion to electricity and back. Using electricity lets you use capacitors and batteries to smooth that spiky but efficient power production to a a smooth supply for the electric motors.

Comment Nucular power (Score 2) 97

Take a look at this graph: Nuclear Electricity Production. It's quite easy to spot 1986 on this graph (Chernobyl). That's where the trend of acceleration in nuclear power growth has reversed into deceleration. No such reversal has occured in demand for electric power, of course. The shortfall has been largely picked up by coal.

The number of people that have been killed by air pollution from coal as an indirect result of the nuclear stagnation after the Chernobyl accident is well into the millions.

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