Here's that first sentence with them...

They've known for a while now, and been talking about it for well over a year.

They've known for a while now, and been talking about it for well over a year.

On Jan 1 2020 a new IMO (International Maratime Organization) regulation went into effect. The shipping industry drastically lowered the sulfur content of its fuels and the SOx content of ship exhaust plumes dropped by about 77%. (Other aspects of the fuel change also reduced some particulate pollution, too.)

The COVID sequestration also reduced shipping (and cloud-seeding exhaust from it), along with aircraft contrails and upper-atmosphere dust, and dust-generating industrial processes and transportation activity, which (like volcanic dust) also reflect sunlight over the ocean and lower temperatures.

I've seen claims that the reduction in ship exhaust plumes, alone, are enough to account for ALL the sea temperature rise since 2020, and that with the low-sulfur fuel in continued use the bulk of that excess heating will continue even as activity ramps up post-COVID.

You might have missed my previous post, I agree and want to add that to me it is even a bit more than that.

There is a complex interaction when you see a milk jug full of water hit by a bullet, or see the flow of plasma on the sun twisted by gravity and magnetic fields, or the plasma of the big bang as the expansion of the universe pulls it apart.

But they can be summed up as a expanding force vs a force of cohesion in all of them. Gravity is a force of cohesion on a cosmic scale, but so is magnetism. And at the great inflation, the lingering cosmic filaments of stars and galaxies look very similar to the water spreading from a hit from bullet where the cohesion is from more molecular forces.

If there was a "then a miracle occurs" part of cosmology that still existed, it would be the dark energy that continues to accelerate the expansion of the universe.

But it has one other side effect that isn't spoken of much -- creating clean entropy. How did we go from a homogeneous plasma at the big bang to such different hot/cold regions in the universe? Expansion, which has a similar effect on condensing gasses into liquids and even freezing them into solids. Only in this case some of that condensation ignites and creates the starts, pinpoints of very clean entropy to power whole solar systems. Expansion is what winds the clock of entropy, creating the differentials that then re-mix and make work happen.

So I completely agree, and if you ask me the story of creating entropy differentials for the universe to do work is the "then a miracle occurs" part of the story that still remains.

Once Plex started trying to charge me for casting to my SONOS devices I moved to emby.

https://emby.media/index.html

They do have some smart TV support:

https://emby.media/community/i...

Personally I found this really eye-opening, so...

Regarding the "hockey stick" graph. (Taking absolutely no position on whether Mann was honest or not, competent or not, etc.)

I was under the impression that the Hockey Stick graph had been shown to be defective as an indicator of warming, primarily because it took tree ring data as one of its proxies for temperature, but carbon dioxide concentration increases alone have been shown to substantially promote tree growth even in the absence of temperature increases. So how much of the sudden rise in the graph is from temperature increase (if any) and how much just from increased CO2 levels is unknown.

But I don't have any links to reliable scholarly articles examining this issue. Do any of you?

(Comment I also added to the register article - but I like /. too :-).

I offered to go with Linus to Sao Paulo zoo once to help him avoid having to meet Lula, the president of Brasil which he really didn't want to do :-). I did so only on the condition he do an interview with me. I was fed up of people asking Linus about Linux, so I only asked him questions about the Sinclair QL, which both he and I enjoyed. Interview is still available on youtube here:

https://www.youtube.com/watch?...

"changing perceptions" through marketing? that sounds like an arms race with the other side. Long time ago we thought the right way to change perceptions was through good education and development of critical thinking skills.

Where did it all go wrong :)

It all went wrong when each sides of the discussion concluded that scientific papers supporting the other side were marketing fake-news, trying to gaslight them into supporting a scam to let the opposing side acquire money and/or power, rather than actual science.

Warmists think evidence against any aspect of their side's story is akin to smoking research sponsored by tobacco companies. Skeptics think any evidence for a global warming story has been corrupted, ala early drug war research on psychedelic drugs, to feed government power grabs and attempts to put rent-seeking taxes on commerce (e.g. Gore's carbon-credit exchange).

Now neither side believes academic papers on the subject. We'll just have to wait and see what the climate does.

Following this paper's prescription, of course, would just put the nail in the coffin on any remaining hope of convincing the population to pay attention to the sort of propaganda it prescribes. (Assuming the very existence of the paper hasn't already done that.)

Flight time is about 20 years. (Proxima is about 4 light years away and the swarm is averaging about 1/5th lightspeed.) I suspect even some of us boomers can hang in here that long - even if life-extension treatments don't become available.

Oops. Maybe not. They're talking about 75 years before getting around to a launch.

I'll be surprised if the project stays funded, since even without delays everyone funding it will die before there's any payoff.

Flight time is about 20 years. (Proxima is about 4 light years away and the swarm is averaging about 1/5th lightspeed.) I suspect even some of us boomers can hang in here that long - even if life-extension treatments don't become available.

Also, I wonder what it will cost to fund the laser for half a century.

The launch and acceleration of the whole swarm is over in about a year. Individual elements are up to speed in much less than that.

(You HAVE to do it fast: Once they're moving they're out of range darned quick, so you have to get them to cruising speed before you can't hit them any more. Fortunately the little motes are really sturdy so you can give them a BIG big push.)

Read The Paper.

You cannot aim sufficient energy over distances like that
[description of betavoltaic battery run off "interstellar wind" of high-speed travel]

Oh, yes...

You CAN aim the propulsion energy well enough for long enough to get them up to 20%ish of lightspeed. After that the energy is stored in their momentum relative to that of the interstellar gas. You don't have to keep powering them from home and there's far more than you need to power them for the rest of the mission.

(I happen to know one of the people involved.)

You cannot aim sufficient energy over distances like that

They were originally intended to be powered by betavoltaic batteries (solar cell sandwich with a charged particle emitter for the peanut butter - like the "radioactive diamond" batteries but with Strontium 90 for the radiation source). But another dude computed what local interstellar hydrogen looked like when treated as a proton/electron beam at 20% of light speed and concluded no other radiation source would be necessary - by a long shot. Just launch with the supercaps charged and you're up to power-generation speed long before they're discharged. You only harvest a fraction of that energy - the "solar cells" are far to thin to stop many of the protons but they make lots of electron-hole pairs on the way through - and you use heavy atoms (much charge per atom) in their semiconductor structure to maximize that. That gives you plenty of power to run the computer, sensors, and attitude control. Also the transmitters to phone home, with several watts total over the surviving portion of the swarm.

and you can't slow these gram-weight "robots" down with this propulsion system.

Sure you can. That not-quite-relativistic hydrogen wind through the radiation battery gives you enough friction, when combined with attitude adjustments, to bring the swarm into proper formation and all traveling at the same speed by the time it reaches the target. (You launch it over a considerable period, with the later ones faster than the earlier ones so they all arrive at the same time.) It's slowed a bit by encounter time, but not by very much. So it has to look fast as it flies by.