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Cake day: October 4th, 2023

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  • justJanne@startrek.websitetoTechnology@lemmy.world*Permanently Deleted*
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    11 months ago

    It’s not just office, SH and many other parts of the German government have been slowly replacing the entire O365 suite with OpenDesk, which is an open source product based on Matrix, Jitsi, LibreOffice, and a few other tools.

    The goal is to have a fully integrated solution for calender, chat, calls, documents, cloud storage, etc.

    My employer is developing parts of that solution and we recently switched our internal communication over to it, and tbh, it’s working really well.

    Now is the perfect point in time to do it, with the GDPR ruling regarding O365 and Microsoft fumbling the migration between old teams and new teams.


  • justJanne@startrek.websitetoScience Memes@mander.xyztemperature
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    1 year ago

    In timekeeping, there are so called stratums to describe how correct a clock is.

    Stratum 0 is a physical process, an inherent property of the universe. An atomic clock would be stratum 0.

    Stratum 1 is a clock defined based on a stratum 0 clock. For example, GPS clocks are usually stratum 1, so are timeservers at universities with atomic clocks.

    Stratum 2 is a clock defined based on a stratum 1 clock, for example, your router’s ntp server if it syncs its time based on gps or a university’s timeserver.

    So if we adopt this jargon for units:

    Meter is a stratum 1 unit, defined based on the stratum 0 properties of lightspeed and cesium resonance.

    Inch is a stratum 2 unit, defined based on the stratum 1 meter.












  • Considering that reading source code can take a long time

    You’ll get faster over time, until reading code is faster than reading documentation, as code will always represent what’s truly happening, while docs are frequently outdated.

    In a language the user isn’t familiar with

    If you’re not that familiar with the language, it’s likely you won’t be contributing to the project. Open source projects usually to have quite limited resources, so they tend to optimize docs and dev UX for people who are likely to contribute.




  • Most fusion attempts try to keep a continuous reaction ongoing.

    Tokamak reactors, like JET or ITER do this through a changing magnetic field, which would allow a reaction to keep going for minutes, the goal is somewhere around 10-30min.

    Stellerator reactors try to do the same through a closed loop, basically a Möbius band of plasma encircled by magnets. The stellerator topology of Wendelstein 7-X was used as VFX for the closed time loop in Endgame. This complex topology allows the reaction to continue forever. Wendelstein 7-X has managed to keep its reaction for half an hour already.

    The NIF is different. It doesn’t try to create a long, ongoing, controlled reaction. It tries to create a nuclear chain reaction for a tiny fraction of a millisecond. Basically a fusion bomb the size of a grain of rice.

    The “promise” is that if one were to just repeat this explosion again and again and again, you’d also have something that would almost continually produce energy.

    But so far, the NIF has primarily focused on getting as much data as possible about how the first millisecond of a fusion reaction proceeds. The different ways to trigger it, and how it affects the reaction.

    The US hasn’t done large scale nuclear testing in decades. Almost everything is now happening in simulations. But the first few milliseconds of the ignition are still impossible to accurately model in a computer. To build a more reliable and stronger bomb, one would need to test the initial part of a fusion reaction in the real world repeatedly.

    And that’s where the NIF comes in.


  • If you actually calculate the maximum speed at which information can travel before causing paradoxes, in some situations it could safely exceed c.

    For two observers who are not in motion relative to each other, information could be transmitted instantly, regardless of the distance, without causing a paradox.

    The faster the observers are traveling relatively to each other, the slower information would have to travel to avoid causing paradoxes.

    More interestingly, this maximum paradox-free speed correlates with the time and space dilation caused by the observers’ motion.

    From your own reference frame, another person is moving at a speed of v*c. The maximum speed at which you could send a message to that observer, without causing a paradox, looks something like c/sqrt(v) (very simplified).



  • Sure, it’d be a solution for five minutes until someone delids the secure enclave on the gaming card, extracts the keys, and builds their own open source hw alternative.

    High-performance FPGAs are actually relatively cheap if you take apart broken elgato/bmd capture cards, just a pain in the butt to reball and solder them. But possibly the cheapest way to be able to emulate any chip you could want.