jakub_h

27 ms·

241.
by jakub_h 11y ago
Yes, what is called "gravity turn" turns the velocity vector, but if the rocket didn't actively reorient itself (so as to keep in line with the velocity vector), gravity itself wouldn't rotate the rocket (change its atti
242.
by jakub_h 11y ago
It's not the case with a rocket, unless you're flying forward with a liquid propellant rocket and the fuel tanks are almost empty so that the center of mass is significantly behind the center of drag (and the atmosphere is appre
243.
by jakub_h 11y ago
No, it won't, because neither the thrust vector nor the gravity causes a moment in this situation. The key insight to the pendulum fallacy is actually that this situation doesn't create orientation-dependent momentum. That wou
244.
by jakub_h 11y ago
Easily. The yardstick is unstable in inclination if it isn't vertical. The rocket is unstable in horizontal position if it isn't vertical. But it doesn't start to rotate as long as the thrust vector goes through the CG. The t
245.
by jakub_h 11y ago
They already figured out how to land on a moving barge, and they just did it.
246.
by jakub_h 11y ago
How is even the landing an inverted pendulum problem? There's no instability of an inclined rocket during the landing; there's an instability of a "gimbaled-away" rocket. That's not the same thing.
247.
by jakub_h 11y ago
However, since the US military recently labeled climate change as the #1 national security threat to the US or something like that, maybe we could hope for some climate science on the side? ;-)
248.
by jakub_h 11y ago
And by "codes", you mean specific legacy software artifacts written in FORTRAN (note that I'm not even spelling it as Fortran)? Of course that's a problem.
249.
by jakub_h 11y ago
No, it wouldn't (most likely): https://en.wikipedia.org/wiki/Jevons_paradox
250.
by jakub_h 11y ago
In late 1980s, it was expected that by 2000, you'd have a GaAs computer on every desktop (powered by Occam or Prolog, of course ;-)). In the end, it turned out that silicon had more life in it than was expected, while being much cheape
251.
by jakub_h 11y ago
If by "why not", you mean physical possibility, maybe because the UK is not going to become tropical again any time soon?
252.
by jakub_h 11y ago
> It’s based on an ideological belief that one “race” is somehow better than another “race”. I would actually think that the belief is, or at least used to be, scientific. Note that this is not a statement about the truth value of the cl
253.
by jakub_h 11y ago
Well, of course it is a Common Lisp product. I haven't seen its internals but I would be surprised if it didn't use the features of CLOS+MOP to that effect, or, vice versa, if these features of CL weren't the very inspiration
254.
by jakub_h 11y ago
It seems to me that least in a part of you argument, you seem to be confusing the deficiencies of particular implementations or server-run code with the idea itself. Stored procedures are bad because your RDBMS has a crappy compiler? Hmm...
255.
by jakub_h 11y ago
> Probably going to get downvoted to oblivion but redefining classes at runtime seems like a really bad idea - surely this just leads to undefined behaviour within your type system. Technically, databases are doing that all the time - at
256.
by jakub_h 11y ago
I guess it apparently depends on what definition of the word "word" (which is quite overloaded) one uses, though. I'm not quite familiar with English linguistic terminology but I believe it's more about sharing a radix t
257.
by jakub_h 11y ago
That "mini-ice-age" claim has been very quickly questioned by many. But the Gulf Stream reportedly exhibits strong signs of slowing down, which to me sounds like a much more important factor for the UK.
258.
by jakub_h 11y ago
If I'm not mistaken, it's not "similar". It's literally the same word, just like the English "hound" and the German "hund". Meanings sometimes split, but the origin is the same.
259.
by jakub_h 11y ago
On a near-noise level, virtually all conversation or interaction can and mostly does contain shades of meaning expressing things that when verbalized explicitly would be considered rude or inappropriate. From that POV, the term appears mean
260.
by jakub_h 11y ago
Aren't people entitled to start a conversation with anyone they want? (Outside of some very traditional pre-modern societies where certain people are not even allowed at all to talk to certain other people, mostly by kinship.)
261.
by jakub_h 11y ago
Micro-what?
262.
by jakub_h 11y ago
Go uses runes... ;-p
263.
by jakub_h 11y ago
I was talking about the root cause, not about the symptoms. The article claims that the alarms were caused by a "checklist error", when in reality, it was an analog interface mismatch caused by incomplete specification which two d
264.
by jakub_h 11y ago
I'm actually quite pleasantly surprised that we've already reached this level of functionality. Imagine aliens coming to our planet and starting classifying stuff on Earth. The idea that alien intelligence without some seeded know
265.
by jakub_h 11y ago
That's exactly why I'm partial to Common Lisp. People can badmouth it as much as they want, but I'm still running Maxima on it, AND the application's language still isn't set in stone by design. (You've also re
266.
by jakub_h 11y ago
What about the claim about the actual cause of the Apollo 11 program alarms? What about the involvement of Hal Laning in the actual design and implementation of the real-time executive casually attributed to Hamilton in this article and som
267.
by jakub_h 11y ago
Have you read Digital Apollo by Dave Mindell? If not, do so. It is a much better researched text on the story of Apollo guidance, by a professor of aerospace history who works at the institution (MIT) formerly involved with AGC. In the me
268.
by jakub_h 11y ago
Uh. There's so much wrong in that article that it hurts. Can't people actually research history more seriously?
269.
by jakub_h 11y ago
What people mean when they say native depends on what people you're talking about.
270.
by jakub_h 11y ago
What about crowdsourcing the job? I'm sure people would be willing to help.

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