Cool yeah, dug through the maths and took the time to understand the situation you were describing and I understand now.

I thought you were describing a something else, and then slightly confused myself by only considering the metric and not the global picture. I was trying to abuse some old heuristic techniques and they don’t quite work for this case, though it was fine for what I was picturing, where Jane and Alice are symmetric about Bob.

Thanks for taking the time to convince me.

Actually reading back over this is hilariously dumb, forgive my bad reading comprehension, that is how redshift works.

Would you agree that, at the moment they pass each other, Alice and Jane would see different points in Bob’s history as being simultaneous in their respective reference frames?

I wouldn’t say that’s necessarily true, no. It’s only true if their speeds are different, the direction they’re travelling doesn’t factor into it. In either case, their lines of constant time are the same because space is rotationally symmetric. I’m not thinking of them adjusting their calculations to some “true” sense of simultaneous, if that’s what you meant in your edit, because there isn’t one by definition.

And it’s related to distance because the further they are from Bob, the greater the discrepancy in their calculations of Bob’s relative time will be.

That really depends on what you mean by time shift in your original comment. If you mean the shift in what they perceive as simultaneous, then it’s not, but it seemed to me that’s what you meant. If you mean the difference in their age then I honestly can’t remember how it factors in for the accelerating case, I haven’t had to think about SR problems in a while.

I don’t think this is true, you’re right that what’s considered simultaneous changes*, but it’s not related to distance and that’s not how redshift works.

At best Alice could use the redshift to work out how fast she’s moving relative to Bob, if she’s moving towards and away from him at the same speed, she’ll always get the same result. She’d actually think the same moments are simultaneous regardless of direction.

The time difference is only accumulated during her acceleration so it can only be measured during it.

*but only when her speed is different

If you want to get really technical, it’s because the symmetries of the Minkowski metric are the Poincaré group. Which includes only rotations, translations and boosts, none of which correspond to acceleration. Meaning it’s inherently impossible to make acceleration look like being stationary because of the geometry of spacetime.

If Alice flies by Bob at some relativistic speed, then there’s a very simple coordinate transform (a Lorentz boost) that flips our perspective to Alice’s pov; she’s stationary and Bob is moving.

If Alice were to accelerate and we did the same thing, we’d end up with a “momentarily comoving reference frame,” in which Alice is only “stationary” for an instant and Bob is moving at a constant speed as before. Or we could create a non-inertial reference frame which would look nothing like Bob’s perspective, but Alice would be stationary.

Physics in non-inertial frames behaves differently, as a simple example: if stationary (or constant speed) Bob dropped an object while floating in space, it would remain there. If accelerating Alice tried the same thing, it would accelerate away from her. You can test this out in an accelerating car or train or whatever and see that it’s fundamentally asymmetrical even before considering SR.

In terms of things like length contraction and time dilation, these are a little more complicated mathematically, but it’s just an extension of the above asymmetry when spacetime is Minkowski rather than Euclidean. The difference in observed time is clear when looking at each person’s worldline, Alice’s isn’t straight like Bob’s and so she unambiguously experiences a different proper time and proper length.

Ultimately this means that even if Alice accelerates then passes Bob at a constantly speed, they’ll both see one another’s clocks running slow by the same amount, when Alice decelerates and returns to compare her stopwatch with Bob’s they’ll have very different totals which corresponds to how much time Alice lost during her acceleration.

It’s satire, but it’s not fake, it does exactly what it says it does.

did you not look at the image?

oh hey there, me too!

you should actually be able to just get hrt directly from your gp if that’s what you’re going for, they’re able to prescribe it and informed consent is the norm now.

your normal gp may not feel comfortable doing it if they haven’t before, so you might need to shop around (if possible), but it seems like most people I know do it this way now.

I’ve had mixed luck, some just don’t work on Linux regardless, legit or cracked, but fitgirl repacks generally work well in my experience.

I’ve been unpacking/installing them by adding the setup exe to steam as an external game, enabling proton GE and running the installer. The annoying part is then grabbing the installed files from the steam directory and then adding the gamr exe to steam as a separate thing I can actually launch. I tried normal wine. Normal wine did not work (on my distro at least, it’s complicated :/).

A friend of mine has had to relearn to sing a number of times because his voice keeps dropping, but he’s still an amazing singer so I don’t think it’s particularly hard to do.

it doesn’t work very well when set to votes only either, it barely seems to function at all now…

sure thing 😊

oh hey that’s my group ❤️

even better, I think that slide was made by a good friend of mine as part of a collab that our trans activist group did with FnB, we’re both members of catalyst.

Sure do, it’s a bit of a full house right now

I actually started the whole thing at urgent care, who took one look at me and immediately sent me to the ER haha. I don’t expect to be back anytime soon, things are going well healing wise, it’s just freaky as hell that the standard is to not stitch up the big hole in me.

Merry Christmas to you too 😊

I had emergency surgery a couple of days ago, and I’ve been home trying my best to recover but this is a new level of body horror I was not prepared for. I’m so glad the whole thing was free though, and the hospital stay was genuinely quite pleasant (I got lucky and ended up with a private room).

Here’s hoping I get through the next couple of weeks without any complications, I just want this thing to be over and done with.

It’s just a regulated amount set by the government of each region, the manufacturers want to make them as profitable as possible, but the regulations say they can only be so profitable. The thing is, if you’re losing 2% per game, it doesn’t seem like much, but the point of slots is you play a lot of games, people sit there for hours and hours and the machines can run multiple games at once in some cases. You can lose all your money quite quickly.

I never worked on physical machines so I can’t really answer any questions about coins, I just got data sheets with the reels on them and info about stuff like custom rules and bonus rounds.

I can’t really see that in the meme, but your explanation makes sense

It depends on the region, we were certifying globally. I don’t remember the numbers that well, it was years ago and I only did a few months there, but I think it’s something like a 98% return for the player, so if you put $1 in, you get 0.98¢ back on average.

Very sarcastic comment, but if the traffic is bad enough then it becomes safe to cycle again because of how little anyone in a car can move.

I mean yeah, that makes sense. The Labor government has been up for sale for years