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Comment ...except it also works remotely for FileVault (Score 1) 237

so it's not exactly "far from a remote hole or a disk decryption technique" as the post suggests. If Screen Sharing is turned on, it allows remote login; if you have access physically or via Screen Sharing, you can use it to turn off FileVault. So it's potentially both a remote hole AND a disk decryption technique. "sudo passwd -u root" now if you hadn't already reset the root passsword!

Comment 1.21 gigawatts? (Score 1) 213

So, um, basic math envelope-scirbbling:

~100kWh battery (to be slightly more range than 85kWh Tesla), charging to 80% (or 80kWh) in 15 minutes, is 320kW during charging.

320kW / 240V = ~1300kA

Good luck getting your local electric company to give you a 1300+ amp connection for a residence. Most people have at most 100-200A on their main breaker. And the theoretical "concept" of this car's inductive charging system: 800V at presumably around 400A is just scary. Don't accidentally drop a penny under the car on top of the inductive loop! I don't want to even picture trying to dissipate ~320kW through a penny.

Not clear to me how there are more people reading about this "concept" car that might or might not be in production in around 5 years maybe, and saying "wait a minute, this doesn't make any sense".

Comment Misleading title (Score 1) 78

These aerodynamic characteristics help to explain how the snake can glide at steep angles and over a wide range of angles of attack, but more complex models that account for 3D effects and the dynamic movements of aerial undulation are required to fully understand the gliding performance of flying snakes

Without that information, I doubt we've revealed the real mysteries.

Comment Re:Pffft (Score 1) 723

The problem wasn't so much the amount of snow. It was that the roads started freezing up quickly and the government authorities that are supposed to take action on closing schools and forcing trucks to use chains or divert around the city failed massively.

Once cars and trucks lost traction (we don't really buy winter tires here), stuck vehicles created enormous gridlock.

I have several friends who either spent 9+ hours getting home or just had to sleep at their offices rather than drive 20 miles.

Comment Re:Pffft (Score 1) 723

Not sure which forecast they're using as an excuse. I think that line is just typical CYA.

Tuesday morning, I looked at the forecast, I saw a big line of snow heading right for all of Atlanta. I was really surprised that based upon that forecast, the main county still hadn't canceled school.

When the snow started accumulating, I stopped waiting for the county to get its collective head out of its butt and I picked up my kids. Managed to get them home before the real circus started.

It's just a reminder of how you really have to be careful about putting your trust in certain systems. Each person has to take some level of personal responsibility because when big systems fail, they tend to fail in a big way.

Comment Re:They did not pass "aversion" to their grandkids (Score 1) 118

Yes, for the initial test group. But two things (quotes from blog not TFP):

1. "startle" is not necessarily aversion

For example, the researchers didn’t do a control experiment where the F0 animals are exposed to the fruity odor without the shock. So it’s unclear whether the “memory” they’re transmitting to their offspring is a fear memory, per se, or rather an increased sensitivity to an odor.

and 2. not for the group where they used IVF to create the offspring to eliminate some possible biases:

To control for these possibilities, the researchers performed an in vitro fertilization (IVF) experiment in which they trained male animals to fear acetophenone and then 10 days later harvested the animals’ sperm. They sent the sperm to another lab across campus where it was used to artificially inseminate female mice. Then the researchers looked at the brains of the offspring. They had larger M71 glomeruli, just as before. (The researchers couldn’t perform behavioral tests on these animals because of laboratory regulations about animal quarantine.)

Comment They did not pass "aversion" to their grandkids (Score 5, Informative) 118

The grandkids had enhanced receptors for that particular smell. They specifically did not test for, and point out in the paper that they do not claim that the AVERSION was passed on, only that F1 and F2 had structures in the brain that are enlarged compared to control, and that are associated with the sense of smell for the chemical that was used to prime the F0 generation.

Much better science-savvy writeup by my cousin on the Nat Geo blog:

http://phenomena.nationalgeographic.com/2013/12/01/mice-inherit-specific-memories-because-epigenetics/

Comment Re:Too bad (Score 2) 216

It's not totally missing. Max legal wifi xmit power is 100mW at the source. Conversion at the receiver is ~37% efficient. So if you're directly on top of the xmitter, capturing ALL the (generally omni-radiated) energy, you'd get 37mW of power. USB on newer devices is like ~10W.

And of course if you're not capturing 100% of the signal in all directions, and if you're away from the source (remember friends: inverse square power dropoff), then you'll be lucky to get even a mW.

Comment Meanwhile, THEIR code is sketchy (Score 3, Funny) 470

Checked out their git repo and did a build. They have a couple sketchy-looking warnings in their own code. A reference to an undefined variable; storing a 35-bit value in a 32-bit variable...

lglib.c:6896:7: warning: variable 'res' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
lglib.c:6967:10: note: uninitialized use occurs here
plingeling.c:456:17: warning: signed shift result (0x300000000) requires 35 bits to represent, but 'int' only has 32 bits [-Wshift-overflow]

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