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Ask HN: Teach me something new

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Re: Ask HN: Teach me something new

#701

Post by silisili »

Engineering-MD wrote: post #255
silisili wrote: post #75

Earlier quoted context omitted.

I'm not an expert, but my family shares. They are best when wet a bit, so typically we douse the cut or wound with peroxide, then apply. That said, they are cheap enough for everyone to have their own if that's a concern for you.

No need for peroxide, just slightly salty water is better unless visibly contaminated. By using peroxide, scars are often worse, which is thought to be due to killing cells which contribute to wound healing. Furthermore, peroxide doesn’t significantly help prevent infections.

Noted, thank you.

Re: Ask HN: Teach me something new

#702

Post by cman1444 »

Beldin wrote: post #605
someweirdperson wrote: post #303

Earlier quoted context omitted.

It is easy, we can spit it into two parts: Proving that all even numbers end up in that loop and proving that all odd numbers do. I'll take the even ones. Who works on the odd ones?

I'll take a stab. An odd number is a number that ends in 1, 3, 5, 7, or 9. - ends in a 1: times 3 + 1: it now ends in a 4, which is even, and thus reduces to the even case. - ends in a 3: tomes 3 is 9, + 1: ends in a 0; even again. - ends in a 5: ×3 ends in a 5 again, +1: ends in a 6; again even! - ends in 7: x3: now ends in a 1, +1: ends in a 2; even yet again! - ends in a 9: ×3 then eens in a 7, +1 thus eens in an…

I think this is getting at a pretty good point. Half of all numbers (all evens) will scale by .5 to the subsequent number. The other half (odds) will effectively scale by approximately 3/2, as you have shown here. Obviously over a large amount of iterations this should cause the calculations to trend lower and lower.

Re: Ask HN: Teach me something new

#703

Post by tmnvix »

marc_abonce wrote: post #683
thematrixturtle wrote: post #483

Earlier quoted context omitted.

It's over 11,000 km from Malaysia to the Cook Islands, yet the number 5 is lima in Malay and rima in Cook Islands Maori.

Apparently it's also rima in Rapanui, the language of Easter Island near Chile. And the number two is even crazier, being roa in Malagasy and rua in Rapanui, so this word is shared from Madagascar all the way to Easter Island. https://en.wiktionary.org/wiki/rima#Rapa_Nui https://en.wiktionary.org/wiki/rua#Rapa_Nui https://en.wiktionary.org/wiki/roa#Malagasy

Likely because Polynesians are descended from East Asians that migrated south to Melanesia and then out into Polynesia.

Re: Ask HN: Teach me something new

#704

Post by silisili »

is_true wrote: post #650
someweirdperson wrote: post #352

Earlier quoted context omitted.

This is not medical advice, but... Cyanoacrylate (also known as "Super glue"). I've been using it to cover some small clean cuts. I think today there's even variants approved for such use.

I'm from Argentina and I've been "glued" a couple of times by paramedics using a glue based on cyanocrylate

It's very common in the US too. When I had knee surgery that involved cutting my kneecap in half(long scar), they superglued the skin back together. Sutures are actually rather rare for most procedures.

Re: Ask HN: Teach me something new

#705

Post by taf2 »

rj11 cables I.e. telephone wires are straight wires so the pins at the end of each cable are reversed… compared to Ethernet rj45 cables they cross over so whether you are connecting the left or the right side of the wire the pin order is always the same…

Re: Ask HN: Teach me something new

#706

Post by sanketpatrikar »

pxeger1 wrote: post #145

Double-clicking on text selects the whole word. Double-clicking and dragging selects text word-by-word. Triple-clicking selects the whole paragraph. Middle-clicking a link opens it in a new tab. Middle-clicking a tab closes it. Middle-clicking in general often has useful functionality!

Triple-clicking and dragging selects text paragraph-by-paragraph.

Re: Ask HN: Teach me something new

#707

Post by joshschreuder »

mikelevins wrote: post #28

I've described this on HN before; forgive me if you've already seen it. I have chronic migraine. It sounds worse than it is; I rarely suffer attacks anymore, and when I do, they're usually mostly harmless, as in the case I'll describe below. Contrary to popular belief, migraine is not a headache. It's something a little more like an epileptic seizure. Intense headaches are one common symptom, but there are a lot of o…

Thank you for teaching me something new! I used to get these more frequently but just had one last week for the first time in ages. Mine look quite a bit like [0] and I never knew what they were or that they had a name.

Mine used to happen a bit when playing sport so I always associated them with dehydration, but it seems like that’s probably not it.

[0] https://commons.wikimedia.org/wiki/File:Scintillating_zigzag...

Re: Ask HN: Teach me something new

#708

Post by raincom »

mikelevins wrote: post #28

I've described this on HN before; forgive me if you've already seen it. I have chronic migraine. It sounds worse than it is; I rarely suffer attacks anymore, and when I do, they're usually mostly harmless, as in the case I'll describe below. Contrary to popular belief, migraine is not a headache. It's something a little more like an epileptic seizure. Intense headaches are one common symptom, but there are a lot of o…

You can find some kind of experimental evidence for your hypothesis that " the neurological process of seeing and the neurological process of being consciously aware of what I'm seeing are not the same thing" in this book: Phantoms in the Brain: Probing the Mysteries of the Human Mind by Ramachandran, Blakeslee

Re: Ask HN: Teach me something new

#709

Post by LargoLasskhyfv »

euroderf wrote: post #517
ZeroGravitas wrote: post #351

Earlier quoted context omitted.

Have any modern constructed languages made use of this knowledge? A very quick Google suggest Esperanto doesn't: https://indo-european.eu/2008/05/esperanto-other-invented-la...

Loglan and Lojban give entirely too much weight to Chinese and other large languages (in terms of numbers of speakers) that have zero relationship to IE (unless you're heavily into Nostratic). I'd like to see someone combine an exemplary form of Romance languages (like, Latin or early French) with an exemplary form of Germanic languages (like modern Icelandic or reconstructed proto-Germanic) to form a new lingua fran…

[Allsprech / Grundsprache / Ursprache / Simplespeak / Allspeak ?]

Re: Ask HN: Teach me something new

#710

Post by mdp2021 »

edgartaor wrote: post #568
mdp2021 wrote: post #236

Earlier quoted context omitted.

> not all colors are electromagnetic frequencies What do you mean? (Outside the detail that "hues" are electromagnetic frequencies, while colours are compositions - there I just simplified.) Which colour is not such?

Magenta have not a electromagnetic frecuency. https://www.youtube.com/watch?v=8FSpCAs5KZg

It is the sum of two ranges (magenta is the sum of red and blue lights): it also exists "outside", like the rest.

For that matter, not even "pinkish grey" is defined by simply a frequency (the hue is, the colour is not): the definition for this purpose was meant to be concise, not literal.

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