qjkxbmwvz

joined 1 year ago
[–] qjkxbmwvz@startrek.website 13 points 1 week 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.

[–] qjkxbmwvz@startrek.website 4 points 1 week 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.

[–] qjkxbmwvz@startrek.website 2 points 1 week ago (4 children)

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

[–] qjkxbmwvz@startrek.website 69 points 2 weeks ago (7 children)

Baking is chemistry, cooking is jazz.

[–] qjkxbmwvz@startrek.website 7 points 2 weeks ago

I'm curious how the battery percentage went up

Physicists hate this one weird trick...

[–] qjkxbmwvz@startrek.website 4 points 2 weeks 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.

[–] qjkxbmwvz@startrek.website 45 points 2 weeks 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...

[–] qjkxbmwvz@startrek.website 13 points 2 weeks ago (2 children)

For those wondering about the energy, not just the power:

When fully charged, the upper reservoir can store enough energy to power the plant at full capacity for 10.8 hours, equivalent to nearly 40 GWh.

[–] qjkxbmwvz@startrek.website 18 points 2 weeks 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!

[–] qjkxbmwvz@startrek.website 26 points 3 weeks ago (2 children)

good enough simulations that you can't tell the difference.

This requires us having actual conversations with those dead people to compare against, which we obviously can't do.

There is simply not enough information to train a model on of a dead person to create a comprehensive model of how they would respond in arbitrary conversations. You may be able to train with some depth in their field of expertise, but the whole point is to talk about things which they have no experience with, or at least, things which weren't known then.

So sure, maybe we get a model that makes you think you're talking to them, but that's no different than just having a dream or an acid trip where you're chatting with Einstein.

[–] qjkxbmwvz@startrek.website 8 points 3 weeks ago

Isn't universally funny.

view more: next ›