supercomputer progress

But at the time it was still often called core (bulk) memory as opposed to faster cache memory. ISTR the memory chips were only 4k bits of SRAM.

Keeping the thing compact and cool was a major part of the engineering.

There is a rather nice article about its design online here.

We still examine core dumps. Compact and cool is still a problem not only for server farms but for things like the Intel NUC. Just can't escape history.

Most of the buildings at RPI dated back to the early 20th century and AC was not an option. The new building to house the System 360/30 was an oasis on hot days. That thing was not compact and used magnetic core. I don't think it had enough computing power to run a modern refrigerator.

iirc during the startup of the new NSA computing center in Bluffdale UT they found they had enough power to either run the servers or keep them cool. Back to the drawing board. It also boggles my mind that bitcoin mining is a major draw on the power grid.

I'm not aware of any cray systems that used core memory. It just makes no sense for the speeds they ran at.

I believe the CDC 7600 was the last Cray design to use magnetic core. He then left CDC and the Cray-1 was SRAM.

The CDC 7600 was no slouch for its time.

If you search for "circuit sim and CUDA" it's out there. There's a Github of "CUDA SPICE Circuit Simulator" .

No clue if it's worthwhile.

My instinct is that it will generate a lot more heat to solve the problem a little bit quicker than a conventional system (unless you are able to split the problem into a large number of distinct separate simulations with different starting parameters.

That is what happens on the system I am working on (not Spice). My bit of it is strictly single threaded but it runs a on every CPU. The next tier up manages the whole thing to keep them busy doing useful work.

Or so a a likes to think. He's an idiot, so nobody else cares.

Only by people as pig-ignorant as a a.

It's one of them. There are others, all equally necessary.

If only it were that simple. A a is much too stupid to cope with all the rest of the stuff that is going on, so he misses the point that not all plants are animal food, and superfluity of weeds isn't going to do much towards ending world hunger.

Given a a's nature since its first appearance here, and its absolute stupidity, I suspect a a is actually one of John Doe's nym-shift names. The two have about the same low IQ level and both are off-topic disruptive trolls.

No, not going to read an index... you didn't cite a single work, or result, and that makes this an evasion rather than an answer.

Solar dynamics isn't significant heat modulation related to global warming. Here's a picture from NASA

a a does like posting claims like that. Since he is an obvious idiot, it is a waste of bandwidth.

Only those who are as brain-dead as a a.

Your sorrow should be directed at you own abysmal ignorance. <snipped more fatuous nonsense >

Water vapour - like gaseous CO2 - is a greenhouse gas because it absorbs and re-radiates specific near-infrared frequencies. Other molecules - like methane - that are active in the infra-red are also green-house gases.

The heat of vapourisation doesn't come into it

The science I've got came from Melbourne, where I got a Ph.D. in Physical Chemistry. If you'd got the talent - you clearly don't - you could learn just as much in Sydney.

According to a a who clearly doesn't know what he is talking about.

It's all about hydrogen bonding. In liquid water the individual hydrogen atoms are strongly bonded to their particular oxygen atom, but they also bond to adjacent oxygen atoms in adjacent water molecules. This happens to a lesser extent in hydrogen sulphide, but the sulphur atom is bigger and the hydrogen bonding to it corresponding weaker.

This has absolutely nothing to do with water's effectiveness as a greenhouse gas. I can't imagine what lunatic delusion has caused you to imagine that it has.

In fact the fact that water vapour condenses out of the atmosphere at high altitudes where the air is cold means that the effective radiating altitude for the water infra-red bands is lower than it is for the CO2 bands because there's more CO2 vapour in the upper atmosphere than there is water vapour.

The effective radiating altitude for any given infra-red wavelength is the one where a photon of that wavelength has an even chance of getting away into outer space rather than being captured and re-radiated by some molecule or other.

Fourier worked out - back in 1824 - that the average temperature of the re-radiating surface of the Earth had to be about -18C. What took a while to become clear was that for a lot of frequencies that re-radiating surface is quite a long way above the surface we stand on, where it's quite a lot colder. Look up "lapse rate" sometime.