You’d think so! right? But instead it is the idea of smearing shit on your ass with your fingers and a piece of paper that now sounds uncomfortable to me. This is the “completely changed your life” element of it. I’ve been using paper for decades no problem, but now I hate pooping outside of home because there is no bidet there. Beware!
Bidet - don’t need any fancy standalone appliance, just a $50 nozzle that goes under the toilet seat and plugs into the water hose. Haven’t paid a penny for toilet paper in 6 years.
In practice, PGP signatures/keys usually work using the “trust on first use” model. The web-of-trust/physical verification of ID documents is a fun idea, but I’ve never met anyone who has used that method in the wild.
The difference between publishing hashes and signatures/keys vs. publishing hashes-only, is that you only need to trust the published keys the first time. They don’t change from year to year. If one year someone hacks ubuntu.com and changes the image files and hashes AND uploads fake keys with signatures, you will notice that the signatures fail to match your saved keys and suspect something fishy.
This will not save you if this is your first time visiting ubuntu.com that happens to be the same day that it has been hacked, but it will protect everyone who has ever visited before and saved the keys. But if the releases were published with hashes-only, every year would be a new hash and a hack would easier slip through.
You can also try to verify the Ubuntu key out-of-band in places other than ubuntu.com, such as in blog posts, old forum/twitter/reddit posts, etc. In principle, hashes could be published on 3rd-party blog posts too, but again they change every year so not as interesting and you won’t find them in as many random places as the pubkeys.
physicists are quite confident only blackholes can Hawking radiate
Good to know! I was starting to get worried :D
you absolutely need a horizon to get radiation
Does the particle need to travel all the way from the horizon to reach you? How long does that take? The horizon still exists on the centrifuge, if only for a moment, shifting slightly from one instant to the next. In principle, at any moment you could detach from the centrifuge and fire 10g rocket thrusters in a straight line instead. In that first instant there is no way to tell the difference between the two.
I say this because in the linked paper, the “acceleration” experienced by the positrons was the bouncing off the atomic nuclei in the silicon crystal, which takes place over the space of a few angstroms, or at most within the 3.5mm size of the crystal, in the time given by the speed of 178GeV positrons (+Lorenz contraction). This instant was sufficient to claim Unruh effects were occurring.
Another complication is that even if the centrifuge slows down as it gets heavier, you can recover most of that mechanical energy when you hop off the centrifuge with your now full jar. Then you can boost it back up almost up to full speed. So I’m not sure exactly at what point you input energy into the system to instantiate the particles. When they hit the belljar bottom transversely maybe? Is this some kind of Maxwell’s Demon situation where you need to close the jar before the particles fall back out?
Also good to mention Earth! Logically, if Hawking radiation works for black holes it seems as if it would also work for any star or planet! But I’ve never seen this mentioned anywhere.
Oh for sure, science is never boring :D but compare the intense situation in the troll science pic to the displayable results from the actual experiment (fig. 1c):
Tip: evidence for the Unruh effect you are looking for is this 2mm difference right here:
The teal dashed line is the power spectrum predicted from theory including the Unruh effect, and violet dashed line is without it. The data points match the teal line better. But you can’t even see that by eye from the noisy dots! You need to do chi-square statistics to even prove it. (The dots below 30GeV - outside the “accelerated thermality” region - are not included in the analysis because they are guaranteed to be incorrect, as the experiment wasn’t sensitive in that range.) Boooring!
What the authors of the paper glance over in a single sentence before moving on to better things is that they had to shoot a FRICKING POSITRON DEATH BEAM FROM THE MFKING LHC through a crystal target and watch the resulting Bremsstrahlung gamma rays that would melt your bones off to obtain these datapoints. Talk about intense!
Like many other popular weird physics effects, it has been accepted non-controversially by scientists and then popularized for decades in fun thought experiments and pop-sci videos, all of which neglecting to mention that no actual experiments have yet been performed. This lack of grounding leads to spread of confusing statements like “the Unruh particles exist in the accelerated frame but not in the lab frame”, which make no sense, for how can there be two separate realities that coexist? Luckily we now do have a first Unruh experiment from 2019 https://arxiv.org/abs/1903.00043v7 and the temperature did rise and reality did not split apart. So no longer hypothetical, just routine and boring.
It looks cool, I’d use it! When you start making fun of me I’d just shrug and carry on, because I don’t care what judgements some weirdo makes about my accessories.
The crazy thing to me is that as you look at galaxies further away, they become bigger in the sky. Obligatory xkcd: https://www.explainxkcd.com/wiki/index.php/2622:_Angular_Diameter_Turnaround There could be huge dragons out there occluding half the sky, but they’d be beyond the last scattering surface of the cosmic microwave background.
First thought was ISP intermittent packet loss, but
Ping is unaffected
no packet loss or jitter
Speedtests of any kind always return when problem is occurring / when problem is not occurring
Suggests otherwise. My second thought was DNS crashing, but
DNS seems irrelevant
You already got it covered.
Some websites like Facebook and Google work
VOIP does not seem to be affected
Really weird situation! Try using wireshark to listen on the interface and observe what’s happening. Are packets going out but none returning? Are they returning with errors? Retransmissions? Are some destinations fine but others get no reply?
Could you geographically locate the IPs that work vs. the IPs that don’t? My next suspicion is that there is some upstream backbone link that cuts out, so stuff with local CDNs like facebook continue to work, but a lemmy server on another continent is unreachable. Try traceroute.
Ahh! Malicious compliance. Beautiful.
While I agree that P2P is the next best thing and torrents are pretty awesome, they are unicast and ultimately they waste far more resources, especially intercontinental bandwidth than multicast would.
Tell me if I understand the use case correctly here. I want to livestream to my 1000 viewers but don’t want to go through CDNs and gatekeepers like Twitch. I want to do it from my phone, as I am entitled to by the spirit of free internet and democratization of information, but I obviously do not have enough bandwidth for 1000 unicast video streams. If only I had ability to use multicast, I could send a single video stream with multicast up my cellular connection, and at each internet backbone router it would get duplicated and split as many times as necessary to reach all my 1000 subscribers. My 100 viewers in Japan are served by a single stream in the trans-Pacific backbone that gets split once it touches land, is that all correct?
In that case, torrent/peertube-like technology gets you almost all of the way there! As long as my upload ratio is greater than 1 (say I push the bandwidth equivalent of TWO video streams up my cellular), and each of my two initial viewers (using their own phones or tablets or whatever devices that can communicate with each other equally well across the global internet without any SERVERS, CDNS, or MIDDLEMEN in between, using IPv6 as God intended) pushes it to two more, and so on, then within 10 hops and 1 second of latency, all 1000 of my viewers can see my stream. Within 2 seconds, a million could see me in theory, with zero additional bandwidth required on my part, right? In terms of global bandwidth resource usage, we are already within a factor of two of the ideal case of working multicast!
It is true that my 100 peertube subscribers in Japan could be triggering my video stream to be sent through the intercontinental pipe multiple times (and even back again!), but this is only so because the peertube protocol is not yet geographic-aware! (Or maybe it already is?) Have you considered adding geographic awareness to peertube instead? Then only one viewer in Japan will receive my stream, and then pyramid-share it with all the other Japanese.
P2P, IPv6, and geographic awareness is something that you can pursue right now, and it gets you within better than a factor of 2 of the ideal multicast dream! Is factor of 2 an acceptable rate of waste of resource usage? And you can implement it all on your own, without requiring every single internet backbone provider and ISP to cooperate with you and upgrade their router hardware to support multicast. AND you get all the other features of peertube, like say being able to watch a video that is NOT a livestream. Or being able to read a comment that was posted when your device was powered off.
Also, I am intrigued by the great concern you give for intercontinental bandwidth usage, considering those pipes are owned by the same types of big for-profit companies as the walled-garden social networks and CDNs that are so distasteful. From the other end, the reason why geographic awareness has not already been implemented in bittorrent and most other P2P protocols is precisely because bandwidth has been so plentiful. I can easily go to any website in Japan, play video games with the Chinese, or upload Linux images to the Europeans, without worrying about all the peering arrangements in between. If you are Netflix you have to deal with it and pay for peerage and build out local CDN boxes, but as a P2P user I’ve never had to think about it. Maybe if 1-to-millions torrent-based server-less livestreaming from your phone were to become popular, the intercontinental pipe owners might start complaining, but for now the internet just works.
Agreed! That’s why I much prefer the “Is there any possible way you could be pregnant right now?” phrasing. Which is straight to the point of “we are about to operate on your abdominal section that could cause fetal loss if we are not aware of it, assuming you care about that sort of thing.” But if you are getting the period question, then it’s just a nurse checking off a box on an insurance checklist when you are there for an ear infection, and 100% of the time it is not relevant then.
Woops, sorry! I got immediately multiply downvoted 100%, I haven’t posted in this community before so not familiar with the culture, and even though I thought my response was relevant, it didn’t look like the community was interested in such an opinion, so I withdrew my post. I said something like that unless I am literally there do get tested for a suspected pregnancy, I would tell them it’s none of their business, or more politely, “given the current political climate, I do not answer questions like these”. Thanks for checking up on me!
Not trans, but unless I am literally there do get tested for a suspected pregnancy, I would tell them it’s none of their business. Or more politely, “given the current political climate, I do not answer questions like these”. Do you do drugs? No response. How many drinks did you have last week? No response. Do you smoke? No response. But it could have medical implications! No it doesn’t. Treat me for what I’m there for and skip the fishing questions! All that shit goes in your medical insurance file that any FBI grandma with a National Security Letter can access. They are only doctors, there is nothing forcing you to answer every single little question they ask.
Brooklyn Bridge is fine. They moved the bicycle path down into the roadway, so there is twice as much pedestrian space now.
was once part of a living being
When you drink a glass of water, about a hundred molecules of that water come from the pee of Isaac Newton from the specific day the apple fell on his head. Generally, every single atom surrounding us has been part of some living being or other thousands of times. Only drink pristine water harvested from interstellar comets!
Literally one block away:
Yes, the water perfectly removes everything and does not splash. I refused to believe it myself. TMI warning: for the first year in my disbelief I would test it personally, for science, by sticking a finger in for “first-hand” comparison. When using paper, no matter how much you wipe, afterwards, even if the finger looks clean, it still has a whiff of ass. Only a full shower after use would remove the whiff entirely. But after using the bidet, the finger looks clean and smells clean, so much so as if there isn’t even a need to wash the finger afterwards (though of course I did anyway). In summary: paper = never fully clean, bidet = fully clean.
I think the difference in our bidet experiences is the water pressure. Mine is plugged directly into the water supply, and I have good water pressure, so the pressurized stream coming out is tight and powerful like a water pik. It took some getting used to. But it’s easy now and it scours everything. I fear a gabo-style bidet that pours instead of powerwashes (or a spraybottle like the one linked in this thread) would not be as thorough and might indeed require a follow-up wipe. But mine doesn’t.