Ooops, as someone else has pointed out, albeit in an offensive way, my chemistry is way off: PTFE doesn't contain any chlorine. Its Carbonyl fluoride probably. When I have worked with Calcium fluoride at elevated temperatures, that evolves fluorine. That can then react with moisture to form hydrofluoric acid.
THis link contains lots of interesting information on the decomposition of PTFE.
Burning Teflon (PTFE) releases Phosgene gas. Phosgene will really ruin your day. Workers with PTFE are carefully prohibited from smoking where there is a chance of picking up particles of PTFE on the glowing tip of a cigarette. Several people have died from the effects of the gas.
People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices. It is im-possible indeed to prevent such meetings, by any law which either could be executed, or would be consistent with liberty and jus-tice. But though the law cannot hinder people of the same trade from sometimes assembling together, it ought to do nothing to facilitate such assemblies; much less to render them necessary.
Adam Smith, the "Wealth of Nations"
What goes around comes around.
Steve
Am I correct that Linux is "similar enough" to Windows?
Not really, there are some major architectural differences. What you highlight are the superficial similarities. For example, the graphical interface in Windows is a fundamental part of the kernel. In Linux, like Unix, its optional.
In fact Edison fought tooth and nail to stop any competition with anything he claimed to have invented, from the lightbulb to "moving pictures". I bet Edison is BEHIND some of the weirder pratcies of modern patent law.
The ONLY folks brave enough to get this shouted down were the Poles. They fought the Germans, they fought the Russians, they fought the communists and now they have beaten off the bureaucrats. A victory for the little guys.
..of course we have been carefully sequestering and concentrating high quality metal stocks and plastics - in garbage dumps. There will be serious money to be had mining these resources in another century or so.
Just emailed him my own commiserations, and he replied. He is inundated with similar emails to mine, and appreciates the international concern with his plight !
While I see what you mean, unless we continue to put[ting] the past into prettier showcases, there will be nothing to remember it by, and nothing to enthuse people in the future apart from photographs and fallible memories.
but the epicentre is very small isn't it , so a comparison is reasonable ?
I found a formula which attempts to give a rough Joule equivalent http://www.ucl.ac.uk/Mathematics/geoma th/logcontex t/qn2.html...which I then translate at roughly 450 MT yield.
Can anyone put some kind of comparision between the energy release here and the energy release of the prospective planet impactor 2004MN4 ? It would help to put things into scale, if not perspective.
If MN4 were to hit, estimated release is 450-2000 MT of TNT, so how does a Richter 8.9 compare.
Food was grown by humankind for an awfully long time and rather successfully without pesticides or herbicides
....but not for anything like as many people. Who is to die if the crops fail from something that a herbicide or pesticide could prevent ? Betch it ain't Americans. It'll be the poor bloody Indians or Africans. And "Green" America will do what then ?
Steve
Old fashioned spring scales work pretty well. Digital ones are cheap to buy here, and a digital scale costs LESS than a set of authentic, if quaint, cups.
Re-calibration is rarely necessary, since within the recipe, the weights are ratiometric. So you might end up with a couple of percent more or less than when you last made something.
Slashdot Mirror
Shawn run SAS http://www.sas.org/
Steve
WTF ?
Bristol is pretty well due WEST of London. Did you mean Brighton ?
Steve
Ooops, as someone else has pointed out, albeit in an offensive way, my chemistry is way off: PTFE doesn't contain any chlorine. Its Carbonyl fluoride probably. When I have worked with Calcium fluoride at elevated temperatures, that evolves fluorine. That can then react with moisture to form hydrofluoric acid.
h ttp://www.mindfully.org/Plastic/Teflon/PTFE-Pyroly sis-Combustion-Hazards.htm exposure of a smoker to 0.4mg of ptfe powder is enough to induce fume-fever.
THis link contains lots of interesting information on the decomposition of PTFE.
http://www.mindfully.org/Plastic/teflon/PTFE-Pyre
Anyway, I am an engineer, not a chemist.
Steve
Burning Teflon (PTFE) releases Phosgene gas. Phosgene will really ruin your day. Workers with PTFE are carefully prohibited from smoking where there is a chance of picking up particles of PTFE on the glowing tip of a cigarette. Several people have died from the effects of the gas.
Steve
People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices. It is im-possible indeed to prevent such meetings, by any law which either could be executed, or would be consistent with liberty and jus-tice. But though the law cannot hinder people of the same trade from sometimes assembling together, it ought to do nothing to facilitate such assemblies; much less to render them necessary. Adam Smith, the "Wealth of Nations" What goes around comes around. Steve
BT is capped. Zen is not, at any download speed. Top flight service all the time with Zen.
Steve
Am I correct that Linux is "similar enough" to Windows?
Not really, there are some major architectural differences. What you highlight are the superficial similarities. For example, the graphical interface in Windows is a fundamental part of the kernel. In Linux, like Unix, its optional.
Steve
a parade of Ph.D.'s testified Thursday
...or scientists even......
I wonder how many of them were atheists... or biologists for that matter.
Steve
In fact Edison fought tooth and nail to stop any competition with anything he claimed to have invented, from the lightbulb to "moving pictures". I bet Edison is BEHIND some of the weirder pratcies of modern patent law.
Steve
...but Russian life expectancy has FALLEN over recent years as they have lowered their uwave emissions.
Go figure.
Steve
The ONLY folks brave enough to get this shouted down were the Poles. They fought the Germans, they fought the Russians, they fought the communists and now they have beaten off the bureaucrats. A victory for the little guys.
Well done.
Steve
What next, bulldozing the library because Barnes & Noble wants to open up a store? ...and then suing people who lend books to other people....
Hmm.
Steve
..of course we have been carefully sequestering and concentrating high quality metal stocks and plastics - in garbage dumps. There will be serious money to be had mining these resources in another century or so.
Steve
Just emailed him my own commiserations, and he replied. He is inundated with similar emails to mine, and appreciates the international concern with his plight !
Steve
While I see what you mean, unless we
continue to put[ting] the past into prettier showcases, there will be nothing to remember it by, and nothing to enthuse people in the future apart from photographs and fallible memories.
Steve
but the epicentre is very small isn't it , so a comparison is reasonable ?
a th/logcontex t/qn2.html ...which I then translate at roughly 450 MT yield.
I found a formula which attempts to give a rough Joule equivalent
http://www.ucl.ac.uk/Mathematics/geom
Steve
Can anyone put some kind of comparision between the energy release here and the energy release of the prospective planet impactor 2004MN4 ? It would help to put things into scale, if not perspective.
If MN4 were to hit, estimated release is 450-2000 MT of TNT, so how does a Richter 8.9 compare.
Steve
Try inhaling gasoline, or leaving THAT on yourskin for any extended period.
Steve
Marty Feldman died of Shell fish poisoning in Mexico city in 1982
Wut ? The use of AO is still largely confined to the longer wavelengths and over tiny, tiny fields of view compared to that of the whole instrument.
The absence of decent, bright, guide stars often limits performance, and the synthetic, laser induced, stars have their own problems.
And space based scopes can see when its cloudy on Earth.....
Steve
Is this a choice ? Because I'd take "slow poisoning", if it exists, over death by starvation anyday.
Steve
Food was grown by humankind for an awfully long time and rather successfully without pesticides or herbicides
....but not for anything like as many people. Who is to die if the crops fail from something that a herbicide or pesticide could prevent ? Betch it ain't Americans. It'll be the poor bloody Indians or Africans. And "Green" America will do what then ?
Steve
...because folks expect 1Ghz processors and full colour screens, and smaller and smaller packages. Something gives: battery life.
Give me a Palm Pilot anyday.
Steve
RTFL to the article - there is immense potential for these things to be solar powered.
Steve
Old fashioned spring scales work pretty well. Digital ones are cheap to buy here, and a digital scale costs LESS than a set of authentic, if quaint, cups.
Re-calibration is rarely necessary, since within the recipe, the weights are ratiometric. So you might end up with a couple of percent more or less than when you last made something.
Steve