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50 Science Misconceptions

heathen says...

"Correlation doesn't imply causation, but it does waggle its eyebrows suggestively and gesture furtively while mouthing 'look over there'."
- Mouseover text of http://xkcd.com/552/

oritteropo said:

Now if he had said correlation does not necessarily imply causation, or that it doesn't prove causation, I'd agree 100%... finding a correlation isn't the end of a study but it could be the starting point for one, and often has been.

Sixty Symbols -- What is the maximum Bandwidth?

heathen says...

Very interesting video, but a pity he went in to all that detail to end with a figure as vague as "1 terabyte in a few hundredths of a second".

If "a few" is 5 we'd get 20 Tbytes/s, if a few is 50 we'd get 2 Tbytes/s.

From wikipedia it seems optical fibre bandwidth is also limited by distance, due to dispersion, but current experimental research results are approaching 100 Terabit/s over a single channel.
(26Tbit/s in 2011, 73.7 Tbit/s in 2013)
http://en.wikipedia.org/wiki/Fiber-optic_communication#Parameters

100 Terabit/s is 12.5 Terabyte/s, which is 1 Terabyte in 0.08 seconds.

So while it still doesn't tell us what the theoretical limit is, for our currently achievable maximum speeds "a few" is 8.

After Hours - 6 Christmas Movies w/ Horrible Secret Meanings

heathen says...

They forgot Die Hard: Office Christmas party is crashed by terrorists, but they don't have a cause, they just want money.
- It's a morality tale about rampant holiday consumerism. If you want a Happy Xmas give up all your worldly possessions, even your shoes!



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