For large blackholes of course. And this actually makes other interesting property. Our universe is in fact giant blackhole with our own event horizon outside it. This also support cyclic big bang theory.
Once entire universe will collapse to singularity, the smallest possible particles shatters, leaving pure energy. Pure energy doesnt have "static" mass so no gravity => kaboom, we have new iteration. Theory of multiverse (multiple black holes aka universes) is out of scope here because we will never be able to escape ours.
The observables in our sky do not match any interior metric for a black hole. In particular generically black hole metrics concentrate a central mass, and (from a Raychaudhuri equation perspective) the known sources of shears and pressures that work against this concentration are insufficiently strong to block ever greater collapse. Additionally, shears and pressures enter into the stress-energy tensor. That's why the centre of a BH can be a singularity.
Observations of distant galaxies and the cosmic microwave background do match the (expanding vacuum) Lemaître-Robertson-Walker metric with the distribution of matter-density described by the Friedmann equations. Distant galaxies fill the sky and are receding from us, from our perspective; they are not concentrating in any sort of middle.
There is insufficient evidence to conclude that a big crunch is in our future.
"Pure energy" is represented in the stress-energy tensor just fine. General relativity's Einstein Field Equations exactly relates the stress-energy tensor to the curvature of spacetime. It gravitates, your argument just falls down.
Science mapped out our solar system and developed base12 to account for rotation and orbit.
What I haven't found is an accounting of our solar system's patterns in our galaxy.
We know about axial precession but we don't know the official cause and some suspect it's related to a pull from another galaxy or a swayish wobble from our solar system's rotation in the galaxy.
Same for a supposed magnetic flip in the earths core. They might be related but we seemingly only know of the precession measured as 1 degree per 72 years but the magnetic north pole doesn't align with any noted patterns nor cause.
That's correct, in fact almost nothing Borg3 has said is remotely accurate.
One cool thought expressed by Penrose is the possibility that all matter will eventually decay or annihilate and all that's left will be massless radiation such as photons. If this happens then the concept of space and time itself will cease since from within the reference frame of a photon space and time are undefined.
In this scenario the distinction between an infinitely expanded, cold, and dilute universe and an extremely small, hot, and dense universe becomes undifferentiable. Without any physical scale by which to distinguish the two, the far distant future of our universe where all matter has disappeared can be equivalently viewed as the big bang of a new universe.
This is what Penrose calls conformal cyclic cosmology [1]. There was a time when physicists debated whether the universe would continue expanding forever or whether gravity would eventually halt its expansion and cause it to collapse back in on itself in a Big Crunch, potentially giving rise to another Big Bang. Conformal cyclic cosmology allows for an endless repeating cycle of universes even in the case where the universe expands forever, by identifying the infinitely distant future of one universe with the Big Bang of the next.
This is highly speculative and almost certainly false, but it's at least grounded in actual physics and is kind of poetic.
There's a version he described in a video where all the matter and energy in the universe is eventually eaten by black holes, so (not sure why) there is no more spacetime. Just black holes. Then unimaginably slowly (if that means anything in the absence of spacetime), the BH's decay through Hawking radiation and this creates a new universe. I like the imagery which is, as you say, poetic.
Penrose also wrote a book proposing that the human brain is a quantum computer and its thought processes couldn't be simulated on a classical computer. I don't think that one has worked out.
Even if the brain were a quantum computer (I think the jury is still out on that one) we could simulate it just fine on a classical computer, it just has exponential slowdown in the worst case.
>> all matter will eventually decay or annihilate and all that's left will be massless radiation such as photons. If this happens then the concept of space and time itself will cease since from within the reference frame of a photon space and time are undefined.
So all matter is pushed out (dark energy) eventually reaching its own event horizon in the dimension we call time, then continues as photons (Hawking radiation). And eventually after all the matter has done so, everything collapses and this universe ends? Sounds like we are in an aging BH to me.
It is the subtitle of a #3 synth-pop hit by Information Society, which debuted only 16 months before the release of the unrelated Belgian techno anthem, "Pump Up the Jam".
Photons? They cannot be stopped, because they have no "static" mass?
As far as they move, they react to gravity, not sure if they can provide its own gravity field. Might be a case as far as they move. Not expert here :)
Photons have momentum. They can drive solar sails. They can kick electrons out of atomic orbitals. Lots of them streaming outwards hold up the outer layers of stars, keeping them from collapsing. Radiation pressure.
Momentum-density is represented in the stress-energy tensor, and so is directly related to spacetime curvature. Light feels and generates gravity.
A sibling comment points out the hypothetical kugelblitz as an extreme example. In cosmology textbooks you can read about the "radiation-dominated era" of the first roughly 50000 years of the universe where the energy density working strongest against the expansion was dense photons (and neutrinos).
I had a radiometer when i was a kid ... is that momentum what makes it spin, because i thought the light was heating the black surfaces more than the white surfaces, so the air molecules bounced more vigorously away from the black.
i didn't think about photons having momentum when i was 8, though.
Photon momentum is a negligible factor in the case of a Crookes radiometer. On a typical vane, it amounts to nano-Newtons of force which wouldn’t move the vane, and certainly wouldn’t overcome friction. Your other explanation is roughly correct for a first approximation.
To make a radiometer that runs on photon momentum, you’d need much lighter vanes, probably larger, a harder vacuum, mirrored surfaces, a stronger source of photons, like a laser, and probably most importantly, some way to reduce friction - like a torsion balance.
Yeah, that was amazing. And so, I learned how to provide LILO + agetty on COM1 on every server I was admining :) So, unless there was HW fault, I could just connect to server via serial to check things out.
Yeah right, like I want to take over the shit broccoli haired nephews created... Even for 3x paycheck.. The one who takes it is a looser, being exploited for pennies to fix all the shit. And I bet at the end, you will be fired anyway, because you are not of their kind..
Winners are managers (who hired nephews) and nephews themselfs, they did barely any usefull job and got paid a lot. They should do usefull job instead, like drivers, warehouse jobs, services, farming and other less paid but very importand and usefull jobs.
> Winners are managers (who hired nephews) and nephews themselfs, they did barely any usefull job and got paid a lot.
That is what the hype is about. They created their kingdom/empire with software and data. And they’ve been looking for any solution that promises to replace programmers. LLM is the best mirage ao far and have grown to cult level.
Heh, HTTP itself is pretty nice and flexible protocol. Its not their fault its get bloated by all shit added to it. Gopher is such inferior protocol compared to HTTP.
But versionning everything is not really great idea. Probably 90% of your files are static. Archives, Media, LIBs. Not worth versioning. But for that 10%, having any (D)VFS is handy. Thats why I wrote DOT for myself, to handle that niche need to version every document I work with.
why not version control those things? if they're static, there's no changes so version controlling them has little cost. maybe existing tools aren't adequate for this conception of the world, but I don't think that's a good reason not to work towards "version control everything"
Cost of keeping all data (up to +100%). If they dont change, no point of really versioning them. Backup of those is simple either, whatever syncing software (incremental).
Docs that often change, its completly different story. I love VCS like features where I can slam 'dot status' to see whats going on, commit when I feel I need snapshot, sync to whatever device I want. And because I run DVFS I dont even bother with backups because I have multiple copies of repo with entire history.
You can genuinely implement the protocol with good performance in 150/200 lines, from memory;
1. Read the opcode
2. If PING, send PONG. If binary or text, continue
3. Read the header size
4. Read the payload size (which is a variable-width integer, hence getting the header size first)
5. Unmask the payload
6. If fin in the header is false, add the payload to a buffer. Else, either immediately dispatch (continuation buffer is empty) or buffer and dispatch (continuation buffer isn’t empty)
There are extensions like setting RSV1 to indicate you need to decompress the payload, but that’s the only one I’ve encountered building clients for >20 WebSocket based APIs.
I’ve had more difficulty building http1.1 implementations that broadly work, still a lot of weird stuff like incorrect chucked message parsing you have to handle on the server side. Yeah plain TCP is obviously simpler but you can’t consume a raw socket in a browser, that’s why web sockets win for me - easy to consume over api and browser.
The alternative is simple.. Go dark. VPN tech is known from like 30 years. Pretty much everyone can use it (VPN providers). But instead using it to browse net, build VPN overlay networks of interest for people. Gaming networks, R&D networks, Retro Networks. People will peer to PoP and use resources. Bad actor? BAN it from network. You have control. This could be done in Internet, but big corpos and big money won the battle. Just wake F*ing up...
I just used a VPN yesterday and the NY times blocked me because they think I look like a bot. It gave a couple possible reasons, one being "a bot was also using this IP address".
VPNs are great for torrenting but any serious website like an online bank or web email provider will turn you away. They claim it's for bots but really it because they only want customers they can track.
You're conflating a VPN as in a virtual private network, with a VPN as in Nord/Atlas/ExpressVPN, which use the same underlying technology in a different way.
How I can strugle to keep them off? To peer to network, you need to talk to human.
Arrange L2 connection, assign IPs (only static). If its leaf node, we are done.
If its another network, we need to form BGP connections to exchange routing.
Yeah, Network by Humans for Humans. Thats why Im not interested in all those IoT/Auto networks when you just connect and stuff automagically configure. It looks nice at first glance, but you loose control. F2F works way better in that matter, like RetroShare, but I never investigated it much.
Nah, it needs to be IP. IP is well estabilished protocol, everything speak it.
Once you set it up, you can use it whatever you like. Web pages, gaming service, IRC, Mail, P2P confereces, everything. Everyone will bring it own slice to the pie. You love networking, became PoP and peer and provide access. You just want content? Connect to closest PoP, get IP + DNSproxy and vioala.
I know DN42, but this network is more oriented toward R&D and experimenting. Yeah, its not for your avarage Joe. But your avarage Joe can buy connection from VPN provider and use it, and so we can provide user friendly PoPs with minimal skills needed to setup, supporting different VPN software.
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