the folding of a sword is irrelevant; it's just easier to keep the two halves aligned when starting to weld them with their own heat that way
as long as you can stretch and deform and fuse the material infinitely many times there's no limit other than time and energy to how many times you could fold it
paper is relatively non-stretchy and non-fusible, which is why the limit with a sheet of notebook paper is 7 or 8 times
The losers complain that the folded unit can't stand on its own.
But I don't see a requirement that it stand at all, merely that it is folded. Which it is.
2^13 is 8192 layers.
The really interesting thing is that it doesn't tear. There's stretching and compressing involved in folding things, and toilet paper isn't all that structurally sound. Their folding method seems to make it flow properly to keep the stresses from damaging it.
The score display/hiding seems to be totally random.
Worse is the article expand/collapse misfeature. When I go to do a reply, every time I click in the text box it thinks I want to expand the thread further. Basically I have to expand every article in the thread (and many run to 20 levels) just to start entering my reply.
Total #fail on someone's scripty little part.
And in the article-submission dialog, the edit box is about 20% wider than the box, so the right half of every line is hidden. Only way to deal with that is to compose in an editor and paste it into the box. Plus the tag entry is bollocks. It enters the tag if you hit the spacebar, orders the tags randomly, and trying to delete one only succeeds in giving you the negation of the tag, not the deletion of it. The only way to deal with that is to close the submission form, clear your history and cookies (stuff in that form is ultra-sticky) and start over.
But at least I can use the word "replace" in a posting now, without some eval code bunging that up.
They weren't hit. They were clients of the mass-mailing service that got hit. If you were on Epsilon's list under Visa, Epsilon notified Visa that you were exposed. Visa then should have notified you.
I got 4 separate notifications, but I suspect that's not all.
I've tried to get Epsilon to give me a full list of what companies using their service have my email address, but, in phenomenal wanker fashion, they refused, citing "privacy" and "security".
Hydrogen goes almost straight up, in air. But if you don't get rid of it, the explosion will break your plumbing and possibly damage the reactor. Getting it out of there should have been their priority from the invention of nuclear power.
I agree that the primary problem here is that they were working to avoid scaring people over small releases, instead of working to stop big releases. And by they I mean everyone ever involved in the design, planning, construction, and operation of that plant. Which may include Enrico Fermi.
I didn't realise a HEPA filter could filter out atoms. Actually, I know it can't. HEPA filters work on sub-micron scales, not on sub-nanometer scales. If they actually do such filtering it would have to be to stop radioactive dust or smoke, because it won't stop radioactive gas.
The design should either have an expanding bag to contain the gas (it'd have to be gigantic) or a fail-open set of vents.
Because if you let the gas just build up and (inevitably) ignite, it's going to be vented the hard way, and mess up your other efforts to get the situation under control.
Problem #2 is giving a damn about the reactor once it breaks. You need pure water only if you want to restart it. But when you're trying to prevent people dying by busloads, nobody much is going to care if you can restart it. Whatever coolant you have is fine.
Everything depended on the assumption that the coolant had a backup system.
Once that assumption was mooted by the tsunami, the flaws in the rest of the system became known.
One of which is that once you lose cooling and can't get it restarted, you will inexorably have to vent hydrogen into a closed space full of air. Another is that there is no way to vent it to the outside to reduce the effects of an explosion. Another is that an explosion will further damage the plumbing, making it even harder to get the cooling system working again. Another is that if the cooling system is completely bunged, there's no way to throw external coolant on the thing that has any effect. And another is that they stored the "spent" fuel rods in bunches in what is basically an open swimming pool, so that any chance it gets to evaporate the water around it will result in a fire.
What's criminal here is that these things were known to be bad assumptions long ago, but these reactors were operating as originally installed. Newer reactors don't have a dependency on electric pumps for cooling. Nothing was done to make these safer.
They should have active venting to the outside so that gas buildups can be mitigated. And they should avoid explosive-gas generating chemical reactions in all states of operation or disrepair.
So we can expect one somewhere every 16-18 years. And we have hundreds of nuclear reactors worldwide. And we still run reactors that are built out of Jenga blocks?
There is no such thing. There is only enough, or not enough. Obsolete is not enough. Once it was determined that the reactor design was flawed and the failure-mitigation systems were worthless, the only correct thing to do would have been to refit the design with failure-mitigation systems that were bulletproof.
There are dozens of this sort of reactor still in use. All of them should be fitted with gravity-fed cooling systems, immediately.
Slashdot Mirror
The ??? is implied in the protein folding. We're still just guessing at it.
If you film at 240 fps, you can factor it down to 120, 60, 48, 30, and 24 fps, and everyone gets a "native" copy for their preferred viewing platform.
Yes, it's a metric assload of data, but what's a few hard drives compared to the cost of a day's shooting or a minute's CGI compositing?
the hammering and heat have a lot to do with it, too, in aligning metal grain.
the folding of a sword is irrelevant; it's just easier to keep the two halves aligned when starting to weld them with their own heat that way
as long as you can stretch and deform and fuse the material infinitely many times there's no limit other than time and energy to how many times you could fold it
paper is relatively non-stretchy and non-fusible, which is why the limit with a sheet of notebook paper is 7 or 8 times
MRI measures the magnetic dipoles in water molecules
depends how you tune it
Had I mod points, I would dub thee -1, Offtopic.
First, paper folding. Then, protein folding. Then, a cure for cancer.
Then profit, of course.
The losers complain that the folded unit can't stand on its own.
But I don't see a requirement that it stand at all, merely that it is folded. Which it is.
2^13 is 8192 layers.
The really interesting thing is that it doesn't tear. There's stretching and compressing involved in folding things, and toilet paper isn't all that structurally sound. Their folding method seems to make it flow properly to keep the stresses from damaging it.
It's been going on a lot longer than that.
It wouldn't be Chewie. It'd be one of the 6-year-old kids suddenly populating the bar.
We should probably kill him again, just to be sure.
Is jumping the shark really a bad thing when the shark has a fricken' laser beam on its head?
The score display/hiding seems to be totally random.
Worse is the article expand/collapse misfeature. When I go to do a reply, every time I click in the text box it thinks I want to expand the thread further. Basically I have to expand every article in the thread (and many run to 20 levels) just to start entering my reply.
Total #fail on someone's scripty little part.
And in the article-submission dialog, the edit box is about 20% wider than the box, so the right half of every line is hidden. Only way to deal with that is to compose in an editor and paste it into the box. Plus the tag entry is bollocks. It enters the tag if you hit the spacebar, orders the tags randomly, and trying to delete one only succeeds in giving you the negation of the tag, not the deletion of it. The only way to deal with that is to close the submission form, clear your history and cookies (stuff in that form is ultra-sticky) and start over.
But at least I can use the word "replace" in a posting now, without some eval code bunging that up.
They weren't hit. They were clients of the mass-mailing service that got hit. If you were on Epsilon's list under Visa, Epsilon notified Visa that you were exposed. Visa then should have notified you.
I got 4 separate notifications, but I suspect that's not all.
I've tried to get Epsilon to give me a full list of what companies using their service have my email address, but, in phenomenal wanker fashion, they refused, citing "privacy" and "security".
Hydrogen goes almost straight up, in air. But if you don't get rid of it, the explosion will break your plumbing and possibly damage the reactor. Getting it out of there should have been their priority from the invention of nuclear power.
I agree that the primary problem here is that they were working to avoid scaring people over small releases, instead of working to stop big releases. And by they I mean everyone ever involved in the design, planning, construction, and operation of that plant. Which may include Enrico Fermi.
I didn't realise a HEPA filter could filter out atoms. Actually, I know it can't. HEPA filters work on sub-micron scales, not on sub-nanometer scales. If they actually do such filtering it would have to be to stop radioactive dust or smoke, because it won't stop radioactive gas.
The design should either have an expanding bag to contain the gas (it'd have to be gigantic) or a fail-open set of vents.
Because if you let the gas just build up and (inevitably) ignite, it's going to be vented the hard way, and mess up your other efforts to get the situation under control.
Big tank. There is a hill right behind Fukushima Daiichi. Why the tanks on top of it weren't gravity-feed coolant storage is a mystery.
What standard are you talking about? And what software?
TFA is about sharing data that companies are keeping secret or are too lazy to publish.
You can pay me now, or you can pay me later.
Statistics are like that.
Problem #2 is giving a damn about the reactor once it breaks. You need pure water only if you want to restart it. But when you're trying to prevent people dying by busloads, nobody much is going to care if you can restart it. Whatever coolant you have is fine.
Everything depended on the assumption that the coolant had a backup system.
Once that assumption was mooted by the tsunami, the flaws in the rest of the system became known.
One of which is that once you lose cooling and can't get it restarted, you will inexorably have to vent hydrogen into a closed space full of air. Another is that there is no way to vent it to the outside to reduce the effects of an explosion. Another is that an explosion will further damage the plumbing, making it even harder to get the cooling system working again. Another is that if the cooling system is completely bunged, there's no way to throw external coolant on the thing that has any effect. And another is that they stored the "spent" fuel rods in bunches in what is basically an open swimming pool, so that any chance it gets to evaporate the water around it will result in a fire.
What's criminal here is that these things were known to be bad assumptions long ago, but these reactors were operating as originally installed. Newer reactors don't have a dependency on electric pumps for cooling. Nothing was done to make these safer.
They should have active venting to the outside so that gas buildups can be mitigated. And they should avoid explosive-gas generating chemical reactions in all states of operation or disrepair.
So we can expect one somewhere every 16-18 years. And we have hundreds of nuclear reactors worldwide. And we still run reactors that are built out of Jenga blocks?
"Obsolete nuclear reactor containment"
There is no such thing. There is only enough, or not enough. Obsolete is not enough. Once it was determined that the reactor design was flawed and the failure-mitigation systems were worthless, the only correct thing to do would have been to refit the design with failure-mitigation systems that were bulletproof.
There are dozens of this sort of reactor still in use. All of them should be fitted with gravity-fed cooling systems, immediately.
So, if I think something 10,000 miles away is not critically affected, I must also think that something at ground zero is uncontaminated?
Please don't post again. You're stupid.
As long as there's none lower nor fruitier.