CanadaPlus

@CanadaPlus@lemmy.sdf.org

Formerly u/CanadaPlus101 on Reddit.

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CanadaPlus,

No, really??? /s

Edit: Honestly it’s not as bad as I expected.

CanadaPlus,

I’m not sure how you could possibly build an implant that can just redeposit itself like that.

CanadaPlus,

Can’t tell if serious.

CanadaPlus,

Revenge of the Romans. They want their lake back. /s

CanadaPlus,

It’s a shame. It’s beautiful down there, the Arabs left some really cool stuff.

CanadaPlus,

Oh, if only.

The shitty thing is they’d start wearing lighter clothes, and use it as a campaign point that it’s not that bad, actually. Power appears to be a hell of a drug.

CanadaPlus, (edited )

Well, renewables seem to be saving our undeserving asses, just by virtue of finally getting cheap.

CanadaPlus,

Source? (The past tense make me think you’re quoting a paper)

CanadaPlus,

Worse. Normal people don’t give a shit. Even the ones that are on the team that buys into it don’t want to give up much to fix it.

CanadaPlus,

Yup. Sadly the truth. And then probably cry about all these migrants bothering them “for no reason”, and that it’s hard to find a good reef to dive in on vacation.

CanadaPlus,

Too bad, I’ll have to hunt around myself. Simulation is always a bit vulnerable to assumptions when human behavior is involved, but it’s definitely worth trying to model things.

If that’s true, the political landscape is going to become starkly different. We expect growth right now; it’s used as the yardstick of economic success. Obviously past civilisations didn’t, and we could go back, even peacefully for all I know, but it would be uncharted territory post-industrialisation.

I kind of suspect climate adaptation produces more CO2 than other forms of activity, because it would be construction heavy. I wonder if that’s factored it. Actually, I wonder what the adaptation assumptions are in general.

CanadaPlus,

I don’t think that’s quite true. Where I live it has expanded from nothing to a major power source in just a few years. We’ll need grid storage of some kind to kick fossil fuels completely, but that seems surmountable. Worst case scenario we build pumped air and just eat some round trip losses.

Nuclear plants take many years to get off the ground, so I’m not sure that’s actually an easier solution. Once they’re up and running at scale they’re actually really cheap per unit production, so I would have agreed with you a decade ago, but as it is solar and wind have just pulled ahead.

CanadaPlus,

Well, no. Burning fossil fuels was indeed cheaper than any other energy source, until recently, and for some things still is by far the cheapest. So yeah, we have to sacrifice something today to not cook the Earth. Apparently that’s too abstract for us, though, and we will knowingly steer towards a cliff a few decades away.

As an example, in Canada we have a modest carbon tax, and one that comes right back to people as refunds. It’s still become a political lightning rod and the entire campaign target of the opposition, who is decisively leading in the polls right now. Another one, gen Z says they care, but it’s not grandma buying Shein.

CanadaPlus,

Probably. They’ve mastered the art of corporate-speak; another natural language task which doesn’t require precise abstract reasoning.

I’m kind of convinced that the set of possible moral philosophies most people would agree with in practice is the empty set, at this point, so I’m not surprised those kinds of answers do better.

CanadaPlus, (edited )

Pretty much. If you do, using some kind of cute trick like Alcubierre metrics, you break causality, guaranteed. Clickbait is actually flattery, I think. These headlines might as well be “bat boy”.

Showing a subluminal one is possible without negative energy density is really neat from a theoretical perspective, but gravity is weak. If 99% of c is all you need it’s almost certainly easier to use the hypothetical reaction engine of your choice than burrito spacetime.

CanadaPlus, (edited )

Ignore the article, because it’s not really interesting from a practical perspective, and inevitably will attract crackpottery.

I was going to write about the ins and outs of the twin paradox, but maybe it’s better just to point out that if you leave for Alpha Centauri in 2050 and succeed, you’ll never see Earth 2055; there’s no way around that that preserves causality, and realistically you’re not going home for a much longer time than that if ever. Less travel time onboard is good in that sense, and the sleeper ship concept is attractive to make the trip even shorter.

CanadaPlus,

It still causes time dilation. It just doesn’t require accelerating in the process.

CanadaPlus,

Nope, it will still cause time dilation in the bubble, relative to outside the bubble. The appeal is not having to accelerate things in the bubble, and the existence of (causally questionable) metrics where the bubble exceeds lightspeed.

CanadaPlus,

There’s lot’s of reasons to suspect FTL can’t work in any way, for any vessel. The suspicion is that these solutions only show up in GR because it neglects unknown quantum effects that ultimately keep things nice and paradox-free.

CanadaPlus,

Well, the Alcubierre metrics specifically sidestep that, by “moving” a chunk of a spacetime through itself.

It still breaks causality and is generally suspect for not corresponding to a physical thing quantum gravity allows, though. Plus, since they’re potentially finite, they come with a guarantee any such shenanigans would require negative energy density to happen.

CanadaPlus, (edited )

The paper. It doesn’t actually help for any practical space exploration future or present, but it’s interesting and seems accessibly written so far.

Figure 13 is nice if you just want to visualise it.

CanadaPlus,

Yeah, getting projects off the ground is hard work. These aren’t really Mastodon specific problems, it’s just another version of the whole “I have an app idea” meme that coders joke about.

CanadaPlus,

AIs controlling money is the application that scares me the most, honestly, not weapons. It’s flexible and attached to every section of life by design; there is no such thing as sandboxing.

Seven out of 10 Europeans believe their country takes in too many immigrants (english.elpais.com)

Europeans view immigration with increasing suspicion. Seven out of 10 Europeans believe that their country takes in too many migrants, according to a survey carried out by BVA Xsight for ARTE Europe Weekly, a project led by the French-German TV channel ARTE GEIE and which EL PAÍS has participated in, as part of the countdown to...

CanadaPlus,

It’s a really different situation from America, where xenophobic stuff is concentrated in a very angry, specific slice of the population. It makes me wonder if the EU far-right is less emerging fascism, and more a return to East Asian-style policies, which might have been more natural all along in ancient (former and current) kingdoms.

Just a thought. I’m not even sure I believe it, let alone can prove it, so I guess as they say in Musk-land, “don’t at me”.

CanadaPlus, (edited )

So don’t use it in non-KRY-definite AA situations, or you could get erroneous results. QQX is fine though, as long as you have non-vanishing ABCD. /s

I wonder if Lean proofs become the new peer review like I’ve heard suggested, if mathematics might break from this, and look more compsci-ish in the future. That way non-specialists could get up to speed quickly.

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