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Apollo 11 vs. USB-C Chargers (2020)

forrestheller.com

141–150 of 209 posts

Re: Apollo 11 vs. USB-C Chargers (2020)

#141

Earlier quoted context omitted.

You forgot the most important one, the human computers at ground control. Who said women can't do math? https://www.smithsonianmag.com/science-nature/history-human-...

> Who said women can't do math? Nobody

No one says it, but our implicit biases do - https://ilaba.wordpress.com/2013/02/09/gender-bias-101-for-m...

Re: Apollo 11 vs. USB-C Chargers (2020)

#142

I'm a bit tired of all the sensationalist "look what landed on the moon vs. today's hardware" comparisons. The first airplanes didn't have any sort of computer on board, so computation power is not the single deciding factor on the performance and success of such an endeavor. The software (and hardware) of the Apollo missions was very well-engineered. We all know computation became ridiculously more powerful in the m…

>first airplanes didn't have any sort of computer on board,

Sure they had and often still have, it's called wetware.

>so computation power is not the single deciding factor on the performance and success of such an endeavor

The endeavor to charge a phone?

Re: Apollo 11 vs. USB-C Chargers (2020)

#144

Earlier quoted context omitted.

> Who said women can't do math? Nobody

A quick search will show you many many examples that say otherwise. https://www.dailymail.co.uk/news/article-524390/The-women-ad... Granted, that same search will show you many examples of content accusing unnamed other people of having this attitude. https://www.science.org/content/article/both-genders-think-w... It’s an antiquated notion in my mind, but I don’t think it is a thing of the past.

“women can't do basic math" being an antiquated notion is even weirder. As GP pointed out, companies used to employ lots of predominantly female computers. As a consequence, the first programmers and operators of digital computers were also predominantly women, even if the engineers building them were mostly men.

Women being bad at advanced math would make sense as an antiquated notion, but those in charge of hiring decisions until about 50 years ago evidently thought women were great at basic math.

The study you linked showing that women lag behind men in math to a degree proportional to some gender disparity metric is also interesting, but doesn't really tell us how we got here.

Re: Apollo 11 vs. USB-C Chargers (2020)

#145
post #123

Earlier quoted context omitted.

let me preface this with the disclaimer that i am far from an expert on the topic probably numerous eddies in natural turbulent fluid flows have been digital turing-complete computers, given what we know now about the complexity of turbulence and the potential simplicity of turing-complete behavior. but is there an objective, rather than subjective, way to define this? how complicated are our input-preparation and ou…

> is the game? Sure. One of the "Surprisingly Turing-Complete" examples is that "Magic: the Gathering: not just TC, but above arithmetic in the hierarchy ". See https://arxiv.org/abs/1904.09828 for the preprint "Magic: The Gathering is Turing Complete", https://arstechnica.com/science/2019/06/its-possible-to-buil... for an Ars Technica article, and https://hn.algolia.com/?q=magic+turing for the many HN submissions on…

Could you explain "above arithmetic in the hierarchy" in a few words, TIA, never heard of this

Re: Apollo 11 vs. USB-C Chargers (2020)

#146
post #121
post #118

Earlier quoted context omitted.

It can? How?

as i understand it, with infinite precision; the real numbers within some range, say -15 volts to +15 volts, have a bijection to infinite strings of bits (some infinitesimally small fraction of which are all zeroes after a finite count). with things like the logistic map you can amplify arbitrarily small differences into totally different system trajectories; usually when we plot bifurcation diagrams from the logisti…

Except that infinite precision requires infinite settling time. (Which I guess is the analogue computing version of arithmetic not being O(1) even though it is usually modelled that way.)

Re: Apollo 11 vs. USB-C Chargers (2020)

#147
post #21

Earlier quoted context omitted.

That sounds way too low. Modern fly-by-wire planes are said to have 12-way voting.

> Modern fly-by-wire planes are said to have 12-way voting Do you have a source for that? Everything I've ever read about Airbus says the various flight control systems are doubly redundant (three units). Twelve sounds like it would be far beyond diminishing returns...

This shallow dismissal sounds "sus". It's just off.

Re: Apollo 11 vs. USB-C Chargers (2020)

#148

I'm a bit tired of all the sensationalist "look what landed on the moon vs. today's hardware" comparisons. The first airplanes didn't have any sort of computer on board, so computation power is not the single deciding factor on the performance and success of such an endeavor. The software (and hardware) of the Apollo missions was very well-engineered. We all know computation became ridiculously more powerful in the m…

I don’t think you’re reading these articles in the right spirit if that’s your take away from them.

What I find more interesting is to compare how complicated the tech we don’t think about has become. It’s amazing that a cable, not a smart device or even 80s digital watch, but a literal cable, has as much technology packed into it as Apollo 11 and we don’t even notice.

Playing devils advocate for your comment, one of the (admittedly many) reasons going to the moon is harder than charging a USB device is because there are not off-the-shelf parts for space travel. If you had to build your USB charger from scratch (including defining the USB specification for the first time) each time you needed to charge your phone, I bet people would quickly talk about USB cables as a “hard problem” too.

That is the biggest takeaway we should get from articles like this. Not that Apollo 11 wasn’t a hugely impressive feat of engineering. But that there is an enormous amount of engineering in our every day lives that is mass produced and we don’t even notice.

Re: Apollo 11 vs. USB-C Chargers (2020)

#150

I'm a bit tired of all the sensationalist "look what landed on the moon vs. today's hardware" comparisons. The first airplanes didn't have any sort of computer on board, so computation power is not the single deciding factor on the performance and success of such an endeavor. The software (and hardware) of the Apollo missions was very well-engineered. We all know computation became ridiculously more powerful in the m…

> The software (and hardware) of the Apollo missions was very well-engineered.

I think this is the whole point of articles like this. I don’t think it’s sensationalist at all to compare older tech with newer and discuss how engineers did more with less.

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