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Had master morse code expert who could listen to three streams of morse at the same time. Just like you can follow three speakers. At a party.

Apparently radio operators could identify different people by their “accents”.

There are also big differences in what relative processing power you expect of a computer. As other people have said, the changes in tech that led to the microchip increased by an incredible factor the amount of computing power that can be packed into a given volume - but it's still also true that, to a degree, that the more you have, the more you find uses for - and also that the more you want, the bigger it gets. Some computers are still the size of a room.

IBM, for example, still produces mainframe computers for commercial use that have WAY more concurrent processing power than anything you're likely to have on your desk; the current latest one, the z16, is the size of one or more large filing cupboards. As for supercomputers - the current record holder, the [Hewlett Packard Enterprise Frontier](https://en.wikipedia.org/wiki/Frontier_(supercomputer)), apparently occupies 680m^2 (7,300ft^2 ).

I think "many people" do it because alcohol is habit-forming (and addictive), not because it is easy. 6 to 10 beers in an evening is pretty damaging to the body.

See: https://www.cdc.gov/chronicdisease/resources/publications/factsheets/alcohol.htm

I'd say that it's a matter of satiation.

People can consume large quantities of food-- quite a bit more than liquids.. not because there is more space in your stomach for food, but that your brain says stop a lot sooner with liquids. I personally don't know why, but I suspect that there's a bigger hunger for foods because they satisfy a different need than water.

I feel like beer satisfies that same need, More so than lighter / less nutritious tasting liquids.

The electronic logic elements that they are made of got smaller and smaller. First they were electric relays (about the size of a ping pong ball, then vacuum tubes, then transistors. The transistors consist of materials that conduct electricity under certain conditions. The transistors became smaller and smaller. A single silicon chip can now contain many millions of transistors, each of which has the function of one electric relay. The limit is the (three dimensional) geometry of the transistors on the chip and the (photographic/deposition) process used to make them.

> There are plenty of blindtests that show the eye only can process up to 60 fps.

this is not how the eye works, we dont really process information the same way a camera would.

what we do understand is that 24 fps is the absolute mininum where you can " trick" the brain into believing its seeing motion.

if anythnig the true limitation of these higher rate displays is reaction time to motion

My mother worked in a radio station listening to Morse transmissions during the cold war. She is fluent in hearing and transcribing Morse code, but only going from Morse to letters/numbers, she can't go the other way.

Practice. I can drink that much soda easily. My wife can drink that much Arnold Palmer, but neither of us ever have alcohol.

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There's simple reporting metrics, impressions, click through, dwell time, etc. Depends on the channel its on.

They also do market research. Talk to a sample of people, ask if they recall the ad, their impression of it, their opinion of the product or brand.

They may even run multiple ads to different audiences and compare the results to measure success.

Technically we're all seeing in XYZ , which can then be mapped onto RGB. Mostly.

If an optical illusion tells you "you're going to see a colour that doesn't exist!", It's because by staring at a colour for long exhausts some of the detectors, and then the remaining detectors will send a colour in XYZ space that doesn't properly map to RGB.

The light in a rainbow is made up of many more wavelengths than red, green, and blue. Indeed, every color and shade in the rainbow is a distinct wavelength. Our eyeballs have three different kinds of color receptors. Each receptor responds to visible light, but more strongly to certain wavelengths. You can trigger any color that we can perceive using 3 wavelengths such as red, green, and blue (some other combinations can also be used). We can perceive many more wavelengths than that; we just can't distinguish them.

Both film and digital cameras, by no mere coincidence, respond to the same basic three colors the cells in our eyes do - red, green and blue - so they essentially see the same thing our eye does.

When those images are displayed back to us, our vision system responds to certain proportions of red green and blue as all of the colors of the rainbow, so to speak.

When you look at something emitting a pure yellow frequency, your eyes don’t actually record yellow, it records a certain amount of green and a certain amount of red (and technically probably a certain amount of blue because there is a lot of overlap between the three kinds of receptors and red even actually wraps around and has a little hump in the blue spectrum giving you purple) and your vision processing center interprets that as yellow. If you display red and green light together at the same proportions, your vision system will see that as the same yellow and not know any better.

That’s what the screen you’re looking at right now does - it’s just a bunch of tiny red, green and blue lights shining at different places at different proportions to recreate all the colors you’re seeing.

This would be a good r/writingprompt idea. A person who hears and learns world secret through electronic beeps everywhere. Highly sought after by the MI6 and the CIA for his rare ability. LoL

24 Hz is around the frequency where our brain no longer discerns discrete images as discrete but rather sees them as smooth motion.

However, our ability to detect motion itself is about 5 ms. If there's a tiger lurking in the brush and it leaps out to eat us, it only takes us about 5 ms to detect that tiger. This is equivalent to 200 Hz (although it's not strictly a periodic phenomenon).

Moving on from Newtons work, James Clerk Maxwell developed the understanding that all light we detect is a combination of red, green, and blue (excluding tetrachromats). Even thought we see the rainbow, that's all made up by our brain using RGB data.

Swedish army telegraph training also used mnemonics like that, but with the added bonus that the first letter of the mnemonic was the letter it represented.

Our eyes can't really "process" any FPS. Our eyes aren't cameras and don't really work the same way.

We do know, though, that 24 frames per second is the minimum amount after which we perceive a series of pictures as motion rather than individual shots. But just because that's the minimum doesn't mean we can't benefit from higher rates -- and apparently we do. 24 frames per second looks like motion, but 60 fps looks like smoother motion, and 144 fps looks even smoother, etc. There's probably an upper limit, too, and at some point it does become meaningless marketing stuff, but hey.

This is fascinating. To think you could hear some beeps and automatically come to the conclusion, “that sounds like so-and-so”. Technology is completely fascinating. Even old technology.

Everyone else has answered your specific questions, but if you want to go deeper into the social conventions and culture that early Morse coders developed among themselves, there is a fascinating book, The Victorian Internet, which delves into those. It's about 20 years old, so it predates "Web 2.0", and social media, but it points out many fascinating parallels between Morse operators and early-internet chat rooms.

The gist is that between messages operators would talk amongst themselves, gossiping and becoming long-distance friends. People gained status by transmitting and receiving faster, or by doing so with especial elegance. They invented lots of private acronyms, and conventions to express personal messages, and sub-textual feelings. Romances developed across the wires. It was a whole, shared, nerdy, long-distance world, the first to exist.

Anyway, read the book. I'm sure you'll enjoy it.

This is a good ELI5 because of how you wrote it. You clearly love this topic and it makes me love it.

Run different variations and see which ones get higher clicks, higher conversions (lead sign up, purchase, etc)

Shoot, you're right! Thanks for catching that, it wasnt a nitpick at all. I'll make the edit