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Does anyone know how to get gcc to output the actual numerical value it's evaluating for a "duplicate case value" error? I've got a whole bunch of #defines establishing compile time constants that are being bitwise logicked around into other compile time constants, and somehow a bit is being...

I'm mulling over the idea of coding up a reader for QR-style pixel-grid barcodes. This would be a retrocomputing project with the idea of printing out barcodes where the pixel arrangement of the central part of the barcode would resemble legacy punch card / punch tape hole layouts, with...

The description for the website support sub-forum reads: "Support section for the Orbiter-Forum.con website"

I think the title of the paper speaks for itself: https://arxiv.org/abs/1904.07224 !!!

Where is stuff from users' legacy OF galleries stored? Nothing shows up in the "your media" section (which seems to be where one would store such things with the new software). My sig pic still appears, so it's still stored somewhere, but if I try clicking on it (which would have taken me to it...

Does anybody know of a catalogue of what sorts of orbital resonances are self-stabilizing? For example, a 1:2:4 resonance with the phase relationships of the Galilean moons is self stabilizing, as is a 1:1 resonance with a 60-degree phase difference between the bodies (within certain relative...

The Mandelbrot set is the set of points c on the complex plane such that when you start with z=0 and perform repeated iterations of z=z^2+c, z remains bounded. Most color visualizations of the set color the exterior (the points not in the set) according to the escape time (the number of...

Minimalistic statement of problem to be solved: Given a straight line (geodesic) A in hyperbolic space, a hypercycle H with A as its axis, and a second straight line B tangent to H, what is the separation between B and H as a function of distance from their point of tangency? Actual problem...

I have a 1995-vintage PC that I use for retrogaming / general retrocomputing. The current configuration has Dos 6.22 / Win3.11, Win95, and Debian 4 squeezed onto an 4 GiB IDE spinning-rust disk. I have ambitions to move it all to a larger disk to give Win95 and Linux some more room (DOS, as I...

In trying to do speculative biology for a sci-fi setting, I've run across the problem that nobody seems to have done a lot of previous well-thought-out speculation on alternatives to oxygen as a biological oxidizer (you'll occasionally see suggestions of fluorine or chlorine, but there seem to...

Given a central body A, and two bodies B and C on Keplerian orbits around A, how easy is it to calculate the time-averaged distance between B and C? For circular orbits it appears to be dead simple: the average position of both B and C is exactly the position of A, and the minimum possible...

I've got a bit of a weird question. I'm thinking up an FTL system for a Sci-Fi campaign in which a large number of FTL access points exist, but they barely interact with normal matter (or each other), so you have to survey for them (barely interact, that is, except that they are affected by...

I recently looked over https://en.wikipedia.org/wiki/German_nationality_law , in particular, the "Descent from a German Parent" section, and have come to the ridiculous conclusion that I may, on a technicality, actually carry German citizenship: My great^2 grandfather emigrated to the US in the...

My dad and I are looking for a laptop for my mom, who is a non-techie, with low performance requirements. In shopping for family systems (or, for myself, for personal systems), where we have somewhat higher performance requirements, we've generally gone with buying professional-grade systems...

I'm surprised nothing has shown up about this on OF yet: https://arstechnica.com/information-technology/2019/08/russian-nuclear-powered-cruise-missile-blows-up-creating-mini-chernobyl/ The article is a bit sensationally titled, but the upshot is that the Russian government had prevously...

I know that several people on OF have in the past developed projects that have involved, as part of their scope, randomly generating planetary systems (OrbiterGalaxy and Spaceway jump immediately to mind, both are defunct, as I recall). I know that a lot of hobbyist code has used some variation...

I encountered a 502 when posting to a thread, and am trying to see if I can get it to happen again. The mods can delete this when they see it, I'll know if I need to file a bug or if it was a one-off as soon as I've posted.

In diesem Thread gibt es ein Youtube Link, und das Video hat ein Vorschaubild mit die Wörter "Chilliges Abhängen im Erdorbit. Es ist unvermeidlich, dass Sprachen voneinander Lehnwörter wie "chill" nehmen, aber ich muss das deutschsprachige Welt (witzelnd) warnen, ganz vorsichtig zu sein. Man...

I've been wondering lately what would happen if we took the double slit experiment and, instead of trying to measure *which* path the particle takes, rather measuring whether it takes one path or both. For example, we set up a pair of detectors at either slit, and wire them to an XOR gate. We...

I've thought of a few modified turbojet/fan engines, and I just wanted to get an idea of how feasible they might be for various uses: 1) Put an electric motor on the shaft of a normal turbine engine, and plaster the wings with solar panels. Advantage: during daylight, the solar panels take up...