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phaemon

2,688 karma · joined June 6, 2012

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phaemon··on 2020 has been a year without a flu season in the southern hemisphere
1. Not really

2. No, viruses do not behave like bacteria.

3. To balance my upvotes against my downvotes to maintain my karma at 2600.

phaemon··on Relativty – An open-source VR headset
For 1. Cheaper if you buy in bulk. You could have mentioned that.
phaemon··on 2020 has been a year without a flu season in the southern hemisphere
"They're called". You can't even get your insult right in text?
phaemon··on U.S. Financial Regulator and Banks Urge Action on Climate
YKINMKBYKIOK
phaemon··on U.S. Financial Regulator and Banks Urge Action on Climate
New Zealand is not a small island. It's bigger than the UK.
phaemon··on Traits of good remote leaders
Look at weirdceo.com

Wisdom, Emotional Intelligence, Initiative, Robot, Dastardly or something like that.

phaemon··on Relativty – An open-source VR headset
The parts are all listed right there on GitHub via the How to Build link, either with prices or direct links to AliExpress where you can see the price.

The build comes in under $200. I don't understand the whinging in the comments.

phaemon··on Why is there a normal galaxy sitting at the edge of the Universe?
> But the scale of quarks increases just as much as every other scale

No, there is no scaling of matter or light. It just has a bigger space to play in.

phaemon··on Post-Open Source
> Ok so what is the alternative comrade?

Only privately owned companies - no PLCs. Only people can own companies, not other companies.

How does that sound, comrade?

phaemon··on LibreOffice Online API
These are instructions for interacting with a running Libreoffice Online service.
phaemon··on Show HN: Linux sysadmin course, eight years on
Cancer
phaemon··on Massacring C Pointers (2018)
Nope. And they're not really. Imagine a simple computer with, say, 32 bytes of ram.

All our bytes of ram are numbered. We read a value from byte number 8 and that value is 17.

"Byte number 8" is a pain to remember or calculate so we give it a label and let the computer keep track. That's a "variable".

What does that 17 mean though? Is it a value we want to use later on? It might be. Or it could be referring to Byte 17 in our ram. Byte 17 happens to have the value 42 so if we use Byte 8 as a pointer that's the value we end up with.

But it's entirely our choice. It's just a number and we can treat it as a value or a pointer to another memory address as we like.

phaemon··on Guide to the Many Meanings of Quantum Mechanics
> I need to point out that he was burned at the stake for advocating cosmic pluralism

I need to point out that he wasn't. His heresy trial had nothing to do with his cosmic beliefs. He was convicted for teaching religious beliefs, as a Catholic, that were contrary to Catholic dogma. The church punishment for this was excommunication but the secular punishment was execution, so he got burned.

phaemon··on Thirty years ago today I made the final gold masters for Monkey Island
The original Doom code basically broadcast packets to every machine on the network, which on any large network would bring everything to a crawl. It's why network Doom was explicitly banned on many university networks.

The first patch I ever used (first time I heard the term) was the Doom network patch.

phaemon··on NASA Funded Scientists Claim Breakthrough in Propellantless Propulsion
> Do you honestly think that somebody trained in astronomy could mistake a bird for satellite?

Yes.

> Have you seen how satellites move?

Yes.

> They traverse the sky in a perfectly straight and constant-motion fashion that is utterly unlike any bird.

That's exactly like any migrating bird. Like a goose. Well, until they suddenly switch direction and continue at a constant speed and height till they go over the horizon. Have you ever seen birds migrating?

Also, if lights in the sky that look like meteors but suddenly switch direction are aliens, then I've seen them hundreds of times walking home from the pub (no streetlights here). Never yet been offered a lift!

phaemon··on Why are there 5280 feet in a mile? (2009)
The penny comparison was yours. Why are you making comparisons that you yourself think are daft?

Try to think things out before hitting "reply". It would improve your posts immeasurably.

phaemon··on Researchers are developing a battery powered by diamonds made from nuclear waste
The conspiracy that was continually undermined by its own members and collapsed after just 6 years? I think that reinforces their point rather than yours.
phaemon··on Why are there 5280 feet in a mile? (2009)
No, 240 new pence has exactly the same number of factors as 240 old pence. You're aware that you're not required to always use a whole number of pounds, right? Because you seem a tad confused.

You liked the egg example until I pointed out how daft it was. Ah, the fickleness of youth!

phaemon··on Banks create money, but it's less impressive than it sounds
Of course, in 2004 Northern Bank was acquired by Denmark-based Danske Group. So now, you have Northern Irish banknotes, which are UK pounds (GBP), with Dankse Bank written on them!

https://danskebank.co.uk/about-us/bank-notes/ten-pound-note

phaemon··on Why are there 5280 feet in a mile? (2009)
> I don't want 12 eggs, can you sell me one? Easy when I've 240d to divide into, not so easy with 100 pence)

So old money would have been briefly useful in the early 1990s, over 20 years after it was phased out? Because that's when a dozen eggs cost 1 pound.

In 1970, a dozen eggs cost 3s.4d. Quick, how much is one egg? (for comparison, I see Tesco have 10 eggs for £2.20. How much is one egg?

phaemon··on GCD and the magic of subtraction
Well, it can't hit zero because you'd need equal numbers for that, and they're not coprime ;)

It can't be negative because you cheat and always put "larger - smaller". See your own example: you go:

    13 - 7 = 6 -> 7 - 6 = 1
     a - b = c -> b - c = d
But then then you do:

    6 - 1 = 5 -> 5 - 1 = 4
    a - b = c -> c - b = d
Which switches the order. What if you don't?
phaemon··on GCD and the magic of subtraction
> If someone has a better explanation of why subtracting relatively prime numbers repeatedly will always result in one

I'm not sure about better, but I think I can explain it more simply.

Our subtraction is "a - b = c", where "a" and "b" have no factors in common. And the result is that "c" also has no factors in common with "b". Well, what if they did? What would it look like if "b" and "c" had a common factor?

Let's use the example of "b = 6", that was used in the article. 6 has two factors: 2 and 3, so let's see what happens if 2 is a factor of the resulting "c":

    a  - b = c
    ----------
    8  - 6 = 2
    10 - 6 = 4
    12 - 6 = 6
    14 - 6 = 8

You can see what values of "a" are required to get a factor of "2" as the result, and at this point, I reckon most folk can see the flaw in this cunning plan. But let's rub the point in with 3:

    a  - b = c
    ----------
    9  - 6 = 3
    12 - 6 = 6
    15 - 6 = 9
    18 - 6 = 12

Again, you can see the result. In order for "b" to have a common factor with "c", "a" has to be some multiple more of that common factor.

(slightly more mathy: we're looking at "a = b + c", where b = px and c = qx (x is the common factor), so we have "a = px + qx" yet we're claiming that "x" is not a factor of "a")

Anyway, since we're subtracting and always get a smaller number, and it's always a relative prime, we clearly must end up with 1.

phaemon··on Scientists Extend Quantum States by 22 Milliseconds
This is actually a big deal as it's 10,000 times longer than previous qubit coherence. I reckon quantum computing will be mainstream in the next couple of years.
phaemon··on Ask HN: Can I live with slow / capped rural internet?
I moved rural remote many years ago and it was a pain at the time. The only internet I could get was satellite and the latency was a killer. It still worked out and I've been fully remote since. Wouldn't trade it for anything. They brought in FTTC since so I'm in a good place. Just visit and try it out. See how you get on.
phaemon··on Ask HN: Can I live with slow / capped rural internet?
Docker works in layers. Your problem is that you've put the thing you're changing at the bottom layer so it affects everything above it. Rearrange things so that two character change is the top layer and it will make life a lot less painful.
phaemon··on Ask HN: Do you have private libraries at work?
I used to work in a small company and yes, they used libraries. They were handled exactly the same as open source libs: available on GitHub, just in private repos instead of public.
phaemon··on AI slays top F-16 pilot in DARPA dogfight simulation
Reacting to damage is something you learned in previous generations. You've encountered that situation billions of times (you just don't remember them).
phaemon··on Three quarters of people in the UK now do at least some online grocery shopping
It's also a part of the John Lewis group, and therefore a Workers Cooperative (ie it's employee owned)
phaemon··on Death Valley soars to 130 degrees, Earth’s highest temperature since 1931
> 328K and convert that back to Celsius you end up with 54.85°C

No, that's wrong. If you convert 328K to Celsius, you get 55C. You can't add arbitrary precision to a number. The correct calculation for a whole degree is:

54C => (54 + 273)K => 327K

If you want a single decimal place of precision:

54.4C => (54.4 + 273.2)K => 327.6K

You can then subtract 273.2 to convert back, and you get the 54.4C you started with.

phaemon··on Dementia on the Retreat in the U.S. and Europe
The latter of course. Everyone who has given more than 10 seconds of thought to the issue has considered the opposite relationship because it's so obvious.
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