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joined 1 year ago
[–] [email protected] 1 points 4 months ago

Wouldn't 25 year olds still be in school for their doctorates though?

Yes, I think that's the point


they skew the numbers upwards.

[–] [email protected] 4 points 4 months ago

I particularly like the truck/engine correction.

[–] [email protected] 14 points 4 months ago (1 children)

One thing to keep in mind


the US is huge, both geographically and culturally. Flying from Los Angeles to Boston is further than London to Baghdad.

And likewise, the cultural "distance" between, say, New England or the Pacific Northwest and the deep south is extreme.

Of course there are things that affect (nearly) all Americans, but some context is important.

[–] [email protected] 4 points 4 months ago

But this applies to the UK, Ireland, France, Belgium, Italy, Spain, Portugal, and...well...much of the world, if these data are to be trusted.

[–] [email protected] 2 points 4 months ago (4 children)

But "included" doesn't mean free. You still paid for it.

[–] [email protected] 0 points 4 months ago (2 children)

Baking is chemistry, cooking is jazz.

[–] [email protected] 7 points 4 months ago

I'm curious how the battery percentage went up

Physicists hate this one weird trick...

[–] [email protected] 2 points 4 months ago (1 children)

Exactly. And it includeded a 500GB m2 (SATA, not NVME, but still), with a spare m2 slot available. As opposed to an SD slot + USB port...

Dual gigabit NICs and importantly can be configured to boot after power loss (which the pi of course also does).

And Intel QuickSync may not be perfect but it is well supported with mainline kernels.

Only drawback is that it draws a few extra watts compared to the Pi.

[–] [email protected] 4 points 4 months ago

Is that true though? As in, is it really that dangerous? It seems that you'll dissipate power equal to the inefficiency times the nominal charging power, so something like 5V x 2A x inefficiency (inefficiency being 1-efficiency), which will probably be of order a watt.

I can use my car battery to charge itself without any issues


I just plug the red terminal to itself, and same with the black, which is to say, a battery is always connected in a way that "charges itself."

I think the key is that the battery probably isn't really playing a big role in OOP's setup


electricity doesn't "go through the battery," it just goes from the charging input to the power output circuits, with the additional power (due to inefficiency) being provided by the battery.

[–] [email protected] 46 points 4 months ago (7 children)

I'm not sure though


the power output and the charging input are both regulated and (almost certainly) current limited. So I think (not positive...) that you're basically dissipating your power in the inefficiency the charging and output circuits, with this power coming from the battery.

The inefficiency should (I think...) just be the round-trip inefficiency of the charging/discharging of your power bank


this should be way, way less than the short-circuit power dissipation.

The simplest toy model is to take a battery and try to charge itself. So you put jumpers on the + terminal and you connect those to the + terminal, and same for - (charging is + to +, NOT + to -). But this is silly because you've just attached a loop of wire to your terminals, which is equivalent to doing nothing. With charging circuits in between things get much more complicated, but I'm not sure if it goes full catastrophic short...

[–] [email protected] 4 points 4 months ago (6 children)

I switched my home server from ARM SBCs to a $140 N100 (16GB) and honestly it's a real improvement.

I love the original concept of the SBCs


affordable and efficient, with hardware acceleration for compute-heavy tasks. But the reality for me lately has just been more trouble than it's worth, and running a mainline kernel on x64 is such a better experience. (I'm mostly griping at the Orange Pi I had


RPi tend to have better SW support.)

[–] [email protected] 18 points 5 months ago

For 75kg (roughly average South Korean male weight) and 7" step height (standard in the US I think, not sure about Korea), this is about 0.13kJ/step.

By coincidence, the human metabolic efficiency is (roughly) the same as the conversion between kJ and food (kilo)calories, meaning this would be (very roughly) 0.1 calories/step.

Not much, given a single French fry is maybe 5-10 calories. But it's better than nothing!

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