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Comment What are they talking about? (Score 3, Informative) 25

The summary mentions security a bunch of times, but it says nothing about any specific security measures or requirements. So I clicked through to the article. The article is similar to the summary: no specifics. It links to a long "requirements" document.

What does the document "require" regarding security? Answer: a written plan. 5G networks should write down their plan and send it to the FCC. It should have some specific list of headings and sub-parts.

So the result of this is ... paperwork. Yay...?

Comment Re:For the percentage impaired... (Score 1) 82

Can you link to something authoritative so I can cure my ignorance?

Sorry, I didn't find anything definitive either. However, it follows from the normal use for ratios less than unity. The only difference is the magnitude. Taking "two times" to be equivalent to "200%", and "1/2 times" (or simply "1/2") to be equivalent to "50%":

50% as fast (as the original) = 1/2 (times) as fast = 0.5 * original speed
100% as fast = one times as fast = 1 * original speed
200% as fast = two times as fast = 2 * original speed

50% faster (than the original) = 1/2 (times) faster = (0.5 * original speed) + original speed
100% faster = one times faster = (1 * original speed) + original speed = 2 * original speed
200% faster = two times faster = (2 * original speed) + original speed = 3 * original speed

The expression has two parts. The first can be either "X%" or "X times", both relative to the original amount. If the second part is "as fast" or "as much" (etc.) then this is the final result. If the second part is a relative term like "faster" or "more" then this implies addition, and the first amount, after multiplication, is the difference between the result and the original amount.

Few would disagree with the statement that "50% faster" is equivalent to "150% as fast", and not "50% as fast", but for some reason many become confused by "200% faster" when the formula is exactly the same.

Comment Re:Light years (Score 1) 214

This raises a question: Why do astronomers use irregular units like "light years" and "parsecs" instead of the SI units and prefixes used in every other scientific discipline? Is it just a matter of custom, like the use of English(-ish) units in the U.S.? The SI units would not be any more awkward to work with, and would avoid the need for complex conversions:

distance from Earth to the Sun (1.00 AU) = 150 Gm (gigameters, G=10^9)
distance to Proxima Centauri (1.3 parsecs) = 40. Pm (petameters, P=10^15)
estimated size of the universe (46 billon light years) = 44 Ym (yottameters, Y=10^24)

Comment Re:For the percentage impaired... (Score 1) 82

Sorry, but "330% faster" is indeed 3.3 times faster, or 4.3 times as fast. "4.3 [times] faster" is actually 5.3 times as fast. You're off by one, and GP is correct.

Let's try it this way: "100% faster" and "1 times faster." Do you see how your statement is provably false, now?

Sorry, but the AC is right. "100% faster" = "1 times faster" = "2 times as fast".

"X times as fast" = X * original speed
"X times faster" = original speed + (X * original speed)

Comment Re:Depends (Score 1) 82

... "as slow" would seem to need to be a comparison to a value measured from a reference point ...

"slowness" = 1 / "fastness" (a.k.a. speed)

Say that an object is moving at 5 meters per second. Its "slowness" is, equivalently, one second per five meters, or 0.2 seconds per meter. "50% faster" would be 50% * 5 m/s = 2.5 m/s faster than 5 m/s, or 7.5 m/s in total. "50% slower" would be 50% * 0.2 s/m = 0.1 s/m slower than 0.2 s/m, or 0.3 s/m in total, or 3.333... m/s.

(Intuitively, "50% slower" means that it takes 50% more time to cover the same distance.)

"Twice as fast" = 2 * 5 m/s = 10 m/s.
"Half as slow" = 1/2 * 0.2 s/m = 0.1 s/m, or 10 m/s.

"Half as fast" = 1/2 * 5 m/s = 2.5 m/s.
"Twice as slow" = 2 * 0.2 s/m = 0.4 s/m, or 2.5 m/s.

Comment Or the other reason.... (Score 3, Informative) 415

The fact the whole state is a river flood plain and only stupid people build homes in a river flood plain?

Global warming may have cause the weather pattern changes, but it does not change the fact that if you build in the low lands, you have to expect flooding because it will absolutely happen with a 100% guarantee.

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