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Cake day: June 24th, 2023

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  • rtxn@lemmy.worldMtolinuxmemes@lemmy.worldHow diffrent OSes evolve
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    3 hours ago

    The Linux, GNU/Linux, and BSD ecosystem in general. Since most applications are portable between distributions, an improvement made by one vendor will eventually propagate through everything. A new feature in KDE Plasma will appear both in EndeavourOS and Kubuntu. A security fix in OpenSSH (which is maintained by OpenBSD) will appear in literally all distributions and even Windows.

    (edit) This obviously doesn’t include technically Linux/BSD systems like MacOS and Android. Their existence is sacrilege, and while they are on the council, we do not grant them the rank of Linux or BSD distribution.















  • If something is Nuclear enough it can generate heat

    That’s an extreme oversimplification. RTGs don’t use nuclear waste. Spent reactor fuel still emits a large amount of gamma and neutron radiation, but not with enough intensity to be useful in a reactor. The amount of shielding required makes any kind of non-terrestrial application impossible.

    The most common RTG fuel is plutonium (238Pu, usually as PuO2), which emits mostly alpha and beta particles, and can be used with minimal shielding. It can’t be produced by reprocessing spent reactor fuel. In 2024, only Russia is manufacturing it. Polonium (210Po) is also an excellent fuel with a very high energy density, but it has a prohibitively short half-life of just over a hundred days. It also has to be manufactured and can’t be extracted.

    90Sr (strontium) can be extracted from nuclear fuel, and was used by early Soviet RTGs, but only terrestrially because the gamma emission requires heavy shielding. Strontium is also a very reactive alkaline metal. It isn’t used as RTG fuel today.