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ephimetheus

273 karma · joined March 4, 2015

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ephimetheus··on Apple to allow outside app stores in overhaul spurred by EU laws
In terms of raw capabilities, sure. But they will still feel worse since native apps are almost always much nicer to use in my experience.
ephimetheus··on Apple to allow outside app stores in overhaul spurred by EU laws
PCs are much more expensive than consoles, with that gap only increasing with recent soaring prices for GPUs. I’m guessing this will just force more people into using their smartphones for this.
ephimetheus··on Apple to allow outside app stores in overhaul spurred by EU laws
What if it just makes consoles unprofitable and Sony and Microsoft stop making them?
ephimetheus··on Apple to allow outside app stores in overhaul spurred by EU laws
I have never encountered a PWA where you couldn’t immediately tell it was one. If that ever goes away, then maybe.
ephimetheus··on Is dark matter’s “nightmare scenario” true?
Directly here refers to explicit detection (“here is a signal that is DM and gives us immediate knowledge about its properties”) as opposed to implicit detection through inferring DMs existence from a lack of something.

A lot of people complain about DM being fuzzy, and that’s exactly why: we only have indirect evidence. So what everyone wants is a direct measurement of DM, for example a particle signal if DM is a WIMP.

And to your last point: that’s exactly it, the thought of an unknowable thing in the universe is terrifying, frankly. And this has nothing to do with wanting to be right, whatever DM is, I just want to know, even if it’s fancy MOND without defects somehow, or MACHOs.

ephimetheus··on Is dark matter’s “nightmare scenario” true?
It’s not good because it means there is something in nature that we cannot understand and study, because we cannot in fact observe it directly.

The gravitational discrepancies we have already, but without an explanation or observation, they’re not very satisfactory.

ephimetheus··on Is dark matter’s “nightmare scenario” true?
I guess the nightmare is more that it might be undetectable. There’s a real possibility that DM is real, but we hit the neutrino floor at some point without finding anything (maybe couplings are too weak).

Until there’s an actual convincing alternative, that indeed is not as apparent as you make it out to be, that would be pretty terrible for a lot of physics.

ephimetheus··on Writing down what I do in Obsidian
On iOS/macOS you can use iCloud Drive to synchronize without the subscription. It doesn’t work flawlessly but it’s „ok“.
ephimetheus··on C++ is the next C++
Kind of, if you happen to have the right include paths and compiler flags, which even a compile command database from e.g. CMake doesn't give you (by default)
ephimetheus··on C++ is the next C++
Running this on header-heavy or header-only code is still an unsolved problem however.
ephimetheus··on LaTeX Makes Me Angry
My PhD thesis compiled for about 45mins (300+ pages)
ephimetheus··on Quiet Quitting
She was apparently very hurt by the negative response to this article.
ephimetheus··on EU Passes Law to Switch iPhone to USB-C by End of 2024
I’ve never had a single lightning cable fail ever since they switched to them.
ephimetheus··on I've said it all before but here we go again
Plans continue because if they didn’t, starting from scratch and ramping up again would take decades. This is simply because expertise would be lost in the meantime. Just because the plans are being made does not mean it’s inevitably going to happen.

Also: what makes you say a linear collider would be a better investment?

ephimetheus··on It's time to halt starting any new projects in C/C++
I concede that the Rust tooling is miles ahead no question.
ephimetheus··on It's time to halt starting any new projects in C/C++
In what world is C++ harder to learn than Rust?
ephimetheus··on CernVM File System
Exactly. This is the software delivery mechanism for the LHC experiments. It’s a read only globally distributed (sort of) POSIX filesystem.

We use it in ATLAS to deploy both tagged releases and nightly builds. These can be about 100GB in size each.

The releases are used for production jobs across the worldwide grid, while the nightlies are used as development targets for individual developers.

ephimetheus··on Can the Visa-Mastercard duopoly be broken?
I've never got it either. I do have to say though that the German society is super focussed on cash as a thing so I wouldn't be surprised if the associated cost of it were lower there.

It doesn't make sense to me however that the economics are ostensibly so different between e.g. Germany and France, where in the latter basically even small shops don't care. Either it's something to do with taxes like you said, or German shop's margins are razor thin.

ephimetheus··on Can the Visa-Mastercard duopoly be broken?
That’s due to societal reasons though not really technical ones. In many cases it’s the businesses not being willing to pay the extra fees at all, regardless of how low they are.

This seems to indeed have started to rapidly change with covid.

ephimetheus··on Nuclear energy is clean
> Alpha radiation is completely harmless and doesn’t even get through a sheet of paper.

That is not correct. Yes, alpha radiation doesn’t penetrate skin, but is dangerous if you ingest it. That’s one of the reasons people have abandoned underground long-term storage sites: they all eventually have water break ins and the worry is that the waste will contaminate fresh water supplies.

ephimetheus··on We could have universal Covid vaccines soon
I know literally not a single person who has had a severe reaction to any of the vaccines.

I find it fascinating that on HN anecdata that conforms with the vaccine being dangerous is totally accepted, but anecdata about people getting very sick from COVID are either considered lies or statistical outliers.

ephimetheus··on The euro has tumbled near parity to the US dollar
Which is part of the reason why France during winter typically imports electricity from Germany, because their nuclear plants can’t keep up.
ephimetheus··on Tell HN: Google does not list application permissions in the Play Store any more
The native Revolut app (at least on iOS) had been doing this excessively for a while. I think they toned it down now.
ephimetheus··on Tell HN: Google does not list application permissions in the Play Store any more
This is super frustrating. I’ve described it like feeling like you have Alzheimer’s as everything changes all the time.
ephimetheus··on Please, don't build another Large Hadron Collider
Like the sibling comment says: we’re currently doing this. Higher energies are not really feasible without a bigger ring though so we’re increasing the beam intensity (sort of) to produce more physics per time unit. This very likely won’t reveal any new physics processes, but it will allow us to increase the precision in many measurements we do and could allow us to find discrepancies or otherwise increase our understanding of the existing model.

This is effectively a measure to maximize the output we can get from the machine, so to maximize the return in investment.

There’s a lot of debate in the field what should happen next. FCC is one possibility, but I’m personally sceptical (even though I work at CERN myself).

It seems to me there’s a clear need for a Higgs-factory as a follow up to LHC, but that doesn’t have to be a ring collider, a electron positron linear collider could fulfill this purpose as well.

ephimetheus··on Shimano Forces Hammerhead to Remove All Di2 Related Functionality From Karoo
Right. A guy I know had this fail while riding up a mountain (I believe he said the battery died) and he could not change gears at all even though he tried.

He effectively had to limp his bike home because he was stuck in the gear he had riding uphill. Took him half a day or so rather than an hour.

I’m certainly not a Luddite but this doesn’t seem to be a worthwhile trade off for me.

ephimetheus··on A 9-line summary of textbook physics
I know that is not really what your comment is about, but symmetries, conserved quantities and Noether’s theorem are some of the neatest bits of fundamental physics.

Basically you observe that stuff stays the same if you move around (not true on earth, but like, in space, generally speaking). The physics is invariant under translation. That’s what we call a symmetry.

Now Emmy Noether came up with a relationship and formulae that connects each such fundamental symmetry with a conserved quantity. For translation the quantity turns out to be momentum. Conservation of momentum is one of the most fundamental building blocks of classical mechanics. And we can derive that it is in fact conserved from something as simple as a symmetry.

And it doesn’t stop there: next in line: invariance under rotation: angular momentum conservation, which is equally important as momentum conservation. If angular momentum wasn’t conserved, our universe would look entirely different.

Ages later people figured out that this symmetry business goes way deeper than initially thought. These U(1), SU(2) and SU(3) from the posted link are notation for other, less intuitive, symmetries. Here they don’t apply to space itself anymore but to quantum fields. With that and Noethers theorem (and some admittedly kind of involved maths) you can derive theories describing all electromagnetic and nuclear interactions.

So basically, these symmetries are effectively at the heart of the world (and physics) and I think that’s amazing.

ephimetheus··on How light is a neutrino? The answer is closer than ever
The oscillation mechanism that we’ve come up with (and that fits data from reactor experiments to astronomical ones pretty well) only works if the mass eigen states of the neutrinos are different from their flavor eigen states, otherwise there is no mixing.

We can measure the mass differences between the neutrinos pretty well through these oscillation experiments, but this also doesn’t tell us which the mass hierarchy. It could be bottom up or the other way round.

In principle, one neutrino could be massless and the mass differences we’ve measured so far would still be correct.

Aside from this, pretty much anything is on the table. Neutrinos being their own anti particles? Maybe. Fourth generation of neutrinos? Could be.

ephimetheus··on Google is wrong. Apple’s iMessage is a failure
Just as a data point from outside the US: a 4MB MMS is about 5$ in Germany, even on a 30+$/mo base price package. Sending that to a group call multiplies the cost with the number of recipients.

MMS (and in all likelihood RCS) is a complete non-starter for this market.

ephimetheus··on Why Apple’s iMessage is winning: teens dread the green text bubble
Anecdotal data point from Germany. SMS is still 9ct per message if you don't pay for a package with included text messages, MMS is around 39ct/300kb, and as far as I know there are no (and have never been at any price point) packages with included MMS messages.

It's not surprising >90% of people in Germany use WhatsApp (+ other messengers)

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