alephnil
Joined 15 years ago
Joined 15 years ago
For encoding, you can always write a simple encoder that use only the features that were present in mpeg2, and it will be about as efficient as mpeg2 as well. Newer codecs has more features that allows more efficient encoding, at the cost of more processing.
If this is correct, it was not a von Neuman machine originally, but it eventually became one, and at approximately the same time as the Manchester Baby.
The nautical mile is not an SI unit, so it is not defined by a single organization, Your definition used to be the common definition, but it seems like the relevant organizations has updated the definition to be exactly 1852 m. If the original definition of the meter applies, then it would have been 1851.85 or 15 cm shorter, but with newer measurement of the earth, it would have been more like 1855 m.
Zinc on the other hand is present in all samples in about the same amount, including the unused one. That means that the zinc is likely from the fire retardant rather than the environment. Other metals are present in slightly higher amounts in the environmental samples, and often only in some of the samples. In that case both the fire retardant and the fires/environment are likely to contribute.
To me it seems like copper, lead and manganese are mostly from the fires, while zinc and chromium seems to be from the fire retardant. Then there is the sample from the Franklin fire, that seems to be higher in everything.
What happens is that the squares doesn't stay square like in your screenshot, but varies in size depending on which pieces are in that row. The height of a row varies, but the width of the columns always stays the same.
Edit: It is often not the lowest row that get hidden, often e.g row 4 and 5 get so low that you can't put any pieces there.
Carbon in form of coal is currently used for three purposes in steel production:
1) Heat up the ore to high temperatures
2) Reduce iron oxide to iron.
3) Steel is an alloy of iron and carbon.
Only for the third of these carbon is essential, and that requires some tens of kilos carbon per ton of steel as opposed to more than 2 tons carbon per ton of steel. The two first ones can be replaced by electrical heating and hydrogen respectively. There are currently being built some factories in northern Sweden for doing this, using hydrogen produced by hydropower. Without sufficient tax on carbon or customers willing to pay the extra for "green steel", it is not cost competitive for now.