John Cuthber
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Everything posted by John Cuthber
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Base 256 character set, and "Base Byte" numbering system.
John Cuthber replied to tar's topic in Mathematics
Just a thought; I usually use base 10 so I only need to memorise the multiplication tables up to 10 by 10. beyond that I use long multiplication or (in reality quite often) a calculator. There are about 50 products you need to remember todo that, and it took me a year or two to learn them. If, on the other hand I used base 256 I would need to memorise a set of 32768 products.(as well as needing to remember 255 different names for numbers.) That's roughly a thousand times more numbers to remember so I guess it would take me roughly a thousand times as long to remember my multiplication tables. Maybe I'm just getting old, but you would need to offer a jolly good reason to get me to do that. Is this "new" set of numbers actually going to achieve some purpose? -
Colors in the spectrum and entropy
John Cuthber replied to petrushka.googol's topic in Modern and Theoretical Physics
What perspective is that? Does " a profound lack of understanding of thermodynamics" count as a perspective? -
This is.
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Found It! Countdown From August 2008, "100 Months"
John Cuthber replied to Harold Squared's topic in Earth Science
So, you experienced the opposite of "the lights are on, but nobody is home", as well as Harold's post. -
Found It! Countdown From August 2008, "100 Months"
John Cuthber replied to Harold Squared's topic in Earth Science
We had 100 months to act. We acted. 2009 United Nations Climate Change Conference United Nations Climate Change Conference 2012 United Nations Climate Change Conference and hopefully, we set in motion enough action to stop the changes being irreversible. The way you posted it's as if you thought doomsday was due 100 months after that report. Is that what you thought it meant? Did you read it? -
What do BS of Physics graduates actually do?
John Cuthber replied to Elite Engineer's topic in Physics
I think a lot go into finance. -
Polystyrene absorbs a lot of UV- in particular it absorbs the UV that polystyrene absorbs (yes, I know that's tautology). How well do you expect it to reflect the UV that's absorbed by ABS? (The S in ABS stands for styrene). The cotton sheet is a better idea, but wash it without laundry detergent a couple of times to remove the fluorescent brighteners. Incidentally, most white paint is largely based on titanium dioxide which also absorbs UV heavily. Aluminium foil is probably as good a suggestion as anything,, but if you focus the sun too well you will melt the plastic.
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Why have you put the capacitors in there? (It still won't work without them, but they will stop any current flowing once they are charged, and that will only take something like 2.7 µ Coulombs.)
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Doggy, You might start by reading this https://en.wikipedia.org/?title=Nernst_equation
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can a strictly steady repeatable diet delay (or even prevent) aging?
John Cuthber replied to minaras's topic in Speculations
Not that anyone will care about my opinion greatly, but I have to second that. I'm happy to eat golden syrup and brown sugar sandwiches if there's nothing else to put on the bread and I always have at least 3 sugars in a cup of coffee, but even i found many US breakfast cereals to be over sweetened when I visited. On the other hand, the thing that really struck me in terms of the local diet was the size of the portions. BTW, I realise this is a bit OT, but as far as I can tell, the OP's question has been answered. -
can a strictly steady repeatable diet delay (or even prevent) aging?
John Cuthber replied to minaras's topic in Speculations
There are, it seems, (at least) two schools of thought about Calorie counting in food. One takes account of the fact that, for example, digesting nuts takes some energy while digesting sugar takes much less. The other relies on calculating essentially the heat produced by burning them. If you take the former approach then it's almost tautologically true that 200 Calories is 200 Calories. I think that most of us would accept that (for most people, most of the time ) 200 Calories worth of nuts would be a better option since it would also add some fibre, minerals and vitamins to the diet. If, on the other hand, you are allergic to nuts... -
can a strictly steady repeatable diet delay (or even prevent) aging?
John Cuthber replied to minaras's topic in Speculations
You seem to have cited a wiki article about a film. Do you have a more robust evidence base? -
can a strictly steady repeatable diet delay (or even prevent) aging?
John Cuthber replied to minaras's topic in Speculations
That is plainly silly. If the weather is hot you need to drink more water to replace that lost through sweating. So a constant diet would either be short of water in hot weather or it would have too much water in cold weather. Not in terms of weight loss; they are as good or bas as eachother. -
It's almost as if Hagar never had any intention of coming back and responding to the points raised...
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Base 256 character set, and "Base Byte" numbering system.
John Cuthber replied to tar's topic in Mathematics
Indeed. What about them? -
Base 256 character set, and "Base Byte" numbering system.
John Cuthber replied to tar's topic in Mathematics
I didn't include this by accident. http://www.frenchtutorial.com/en/learn-french/pronunciation/alphabet -
Base 256 character set, and "Base Byte" numbering system.
John Cuthber replied to tar's topic in Mathematics
"Perhaps where I left this thought, before, was in coming up with a particular way to pronounce 0,1,2,3,4,5,7,8,9,A,B,C,D,E,F " un deux trois quatre cinq six sept huit neuf dix http://www.frenchtutorial.com/en/learn-french/pronunciation/alphabet You are stuffed with F which is pretty similar in English and French. You might have to try German or something. -
A misunderstanding about multiplication
John Cuthber replied to Deepak Kapur's topic in Classical Physics
Yes it does. It's the area of the "thread" of fuel that you would have to leave on the ground if, rather than having a tank, the vehicle picked up its fuel from the floor as it went along. It's a physical meaning, but not very useful. -
Base 256 character set, and "Base Byte" numbering system.
John Cuthber replied to tar's topic in Mathematics
This lot would have got you most of the way there more than a third of a century ago. https://en.wikipedia.org/wiki/PETSCII -
Thanks, my guess would have been Krakatoa but the principle is the same. Every now and then a big volcano chucks a lot of dust into the earth's atmosphere and it gets chilly for a year or two until the rain washes the dust out. Then the weather settles back down. None of that makes any difference to the fact that anthropogenic CO2 is warming the air. Can anyone see why Harold thought it was relevant?