Recent submissions

Comment · 2 years ago
Starship cans are pathetically inadequate to support even a Mars base, never mind a Mars colony.
Comment · 2 years ago
Translating it back to C or C++ afterward, it would be equally as safe, and easier to deploy.
Comment · 2 years ago
Curiously, though, we don't really know it is coded in DNA.

Michael Levin has been discovering lately that biology is more complicated than we thought. His YT videos are mind-boggling. Flatworm genetics are a dog's breakfast that the cells work around by means nobody understands.

Comment · 2 years ago
Strontium-90 has advantages. At density 2.6 vs 12, you can afford to loft more of it to compensate for its 28y half-life, and still come out ahead provided you can dispose of the extra heat at first. Few missions need to run decades.
Comment · 2 years ago
Arrayed as a thin film on a substrate, you can use the kinetic energy of the alpha particles directly for thrust. The substrate will need to dissipate some heat from nuclei emitted in the wrong direction.
Comment · 2 years ago
Those use strontium-90, which decays much faster than americium-241. That makes it hotter, at first, but its useful life is less. Being more than 4x less dense, you might carry enough more to make up the difference (and discard the extra heat, at first) if you have the room.

Strontium-90 decays by beta emission, ending up as stable zirconium, meaning you don't have to vent helium.

Comment · 2 years ago
Which C compiler doesn't pack bitfields? Anything on x86 or ARM is bound by the ABI to pack in a standard and link-compatible way.

Seems there would only be a problem on some proprietary compiler for an embedded, bespoke target.

Comment · 2 years ago
It is much worse than just the three extra test-and-branch operations, because they will be serialized through one ALU.
Comment · 2 years ago
The doesn't say whether the C-145As built in Poland for the US Air Force still had the fault, or the SkyTrucks built until 2019. We might guess that since the fault wasn't in the plans, they would not get it, but that might depend on whether they were built in the same factory as HA-LAJ, with the same practices.

It seems as if were both engines to fail, either one prop would be feathered and the lift spoiler on that side extended, or neither prop would be feathered. Presumably the pilot could feather the props himself. It is not apparent whether this would extend both lift spoilers too, or if those were controlled separately.

Comment · 2 years ago
After scrutiny this seems to be "Coroutines and Effects" in, particularly, Rust.
Comment · 2 years ago
Not if dengue is an urban phenomenon.
Comment · 2 years ago
I always wonder which of these smaller sauropods are really just juveniles. Why don't we find any juveniles of the big ones?
Comment · 2 years ago
Doesn't say what it is or how it is imagined to work. Is there an assumption the dust is all negatively-charged? Or positively? Or mixed?

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