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Chemistry / Re: A machine that smells as well as a dog
« on: 25/11/2023 14:23:11 »
They were in the CRT supply of a home made oscilloscope with a VCR97. About 2kV according to this.
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PostscriptWhen I was a kid I had some EHT rectifiers that consisted of a foot long Paxolin tube filled with a stack of selenium discs. After amusing myself melting them with a soldering iron for a few minutes I felt distinctly green round the gills.
If you've ever had a selenium diode catch fire (you'd have to be over 50 to remember these) you will have had a machine that smells worse than a dog.
I was stunned by how loud the gradient magnets were.Not just noisy, some of the ones I've been in felt like the kid on the bus kicking the back of your seat. On one occasion they offered me the music of my choice so I decided to time how long I was in there by counting at the rate of 3 minutes per record, but I couldn't even hear when one track ended and another started.
It takes actual belief, something some of us cannot just conjure at will.Placebos work even when the patient knows they're a placebo.
So is this, for that matter.I assume he's talking about the ambiguity ofCute. What a waste of time...
a square 10 Km on each side
Four times more: multiply by fourThe problem is it's unorthodox use of language.
Four times less: divide by four, i.e. less, by a factor of four.
We use "less" for subtraction and "times" for multiplication.
Do you accept that the price is an important aspect of people's choice?Of course I do, that's why I drew a distinction between 'best' and 'best value'. Which magazine are good at this lark, their 'Best Buys' are usually the best at any price.
Don't they have pacemakers where you come from?Are you talking to me?
Not my area, but as far as know heart rhythm is controlled internally by the sinoatrial node with inhibitory input from the vagus nerve.
The primary control inputs are the vagus nerve (slow down) and the sympathetic cardiac nerves (speed up or pump harder). My preference would be to leave the real heart in place and either run parallel leads from the nerves or detect the electrical activity of the heart itself in response to those inputs, and use that to get the machine to copy the heart beat - an extension of the demand pacemaker..That's how I understand it, but the parasympathetic (vagal) and sympathetic nerves are collectively the autonomic nervous system, which enters the heart at the pulmonary veins, and is isolated by ablation to treat atrial fibrillation.
Much more dangerous would be an attempt to melt Teflon as it does not melt and decomposes releasing a deadly gas.Is it harmful? The advice I recall from my Health & Safety course when I started work was that if you catch a fragment of PTFE swarf on the red end of your fag it'll make you feel like you have malaria for a while, but there's no lasting damage. That might just be because a bit of swarf on a fag is a small dose, of course.
Not my area, but as far as know heart rhythm is controlled internally by the sinoatrial node with inhibitory input fro the vagus nerve.I don't really see how the heart can know what rate is required without some information from outside though.
What is the best metal to make a barbecue grill grate from?Best isn't necessarily the same as best value or most economically viable.grills are made from chrome plated carbon steel
Are you saying the manufacturers are fools?
how can an artificial deal with the changing circulation requirementsThat begs the question of how they reconnect the autonomic nervous system to a transplanted heart, which in turn begs the question how is your own heart controlled after the ANS has been disconnected by a pulmonary vein isolation.