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qjkxbmwvz

@ qjkxbmwvz @startrek.website

Posts
1
Comments
888
Joined
2 yr. ago

  • Why is mercury a liquid?

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  • At this point, they no longer obey the laws of classical physics, and the resulting quantum phenomena — known as relativistic effects...

    This is...not how I would word things. Atomic physics is usually not in a classical (Newtonian) regime, and a quantum treatment is standard.

    Adding relativistic effects to the quantum treatment is also standard, but many aspects of e.g. the hydrogen atom are reasonably well described without relativistic effects, though of course relativistic effects do matter.

    Nitpicking aside, neat stuff!

  • the invisible touch

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  • I'm really really glad that I get root on my work computer.

  • Colpocephalum californici - species of louse which became extinct when all surviving 22 individuals of its host species, the California condor, were deloused in the 1980s

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  • Well, smallpox was definitely harmful to humans, and it's a virus which is different from an animal.

    (...and yes, I know that "harmful to humans" often means "good for the planet.")

  • Colpocephalum californici - species of louse which became extinct when all surviving 22 individuals of its host species, the California condor, were deloused in the 1980s

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  • This louse was reportedly not harmful to its hosts.

    Kinda interested to hear an ethics of science type argument for/against this human-made extinction.

  • mrrp rule

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  • I have heard, but have trouble finding references to it, that you can build a simple arbitrary waveform generator circuit by using an analog scope, a photodiode, and a cardboard cutout.

    You make a photodiode circuit that rails high with no light, but light on the photodiode pushes the signal low. Then you aim this at the phosphor screen with a cardboard cutout of the desired waveform: signal goes up until the phosphor trace is above the screen, and then it gets pushed low (i.e., feedback keeps the trace right on the edge of the cardboard).

    Never seen it in action, but I choose to believe it works beautifully :)

  • Shit, I turn 18 tomorrow

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  • Will anything concrete change in your life --- will you get kicked out of your home, will you suddenly be financially responsible for things you previously weren't, etc.?

    If it's any consolation, a lot of us don't feel like adults, and that's ok! My kids seem to think I'm a grown up, so I managed to fool them at least.

    Just keep learning as you go, and ask questions. We all love talking about things we know/have experience with (just ask the average Lemmy user what Linux distro you should install...), and there's basically no such thing as "cheating" when it comes to figuring out how to be an adult.

    One day at a time!

  • Liquid Swords

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  • I know I could use a fresh start

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  • Fare from Mars back to Earth should always be free.

  • Could the United States lose the war in Iran? Why one professor thinks it will happen

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  • "Can the US lose in a way that allows the crazies in office to save face in their eyes?" seems an important question to me. Because if the options are the US clearly losing vs. the US clearly losing but nuking Iran so everyone loses...

  • US judge orders refunds for more than $130bn in illegal Trump tariffs

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  • I wonder if there's a legal difference between companies adding a tariff line item to the invoice vs. just raising prices (not that there's a moral difference IMHO).

  • The three archetypes

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  • Convincing

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  • "...I really don't want to have to wipe the thing because it's running a headless OS"

    I feel like logging in as root on a headless system and hoping you type the command(s) to restore functionality is a rite of passage.

  • Facebook accounts unavailable in worldwide outage

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  • AWS was recently "having issues" due to the Iran situation --- same thing I wonder?

  • Dear Faith VI

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  • After reading a few of these I feel like I was either a very boring grad student, or my professors were all very chill. (Or maybe just subject to male privilege.)

    A few run-ins with IT, but I don't think I ever got nasty letters from professors...

  • Because apparently JPEG-XL is still unsupported nearly everywhere

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  • B.C. to end time changes, adopt year-round daylight time

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  • ...or is it about an hour from damn time? I can never remember.

  • Simple inexpensive cloud backup?

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  • I've been pleased with it. Family is very relaxed about projects like this, but yeah it's low power draw. I don't think I have anything special set up but the right thing to do for power would be to spin down drive when not in use, as power is dominated by the spinning rust.

    Uptime is great. Only hiccups are that it can choke when compiling the ZFS kernel modules, triggered on kernel updates. It's an rpi 3/1GB RAM (I keep failing at forcing dkms to use only 1 thread, which would probably fix these hiccups 🤷).

    That said, it is managed by me, so sometimes errors go unnoticed. I had recent issues where I missed a week of rsync because I switched from pihole to technitium on my home server and forgot to point the remote rpi there. This would all have been fixed with proper cron email setup...I'm clearly not a professional :)

  • Simple inexpensive cloud backup?

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  • Not the same, but for my Immich backup I have a raspberry pi and an HDD with family (remote).

    Backup is rsync, and a simple script to make ZFS snapshots (retaining X daily, Y weekly). Connected via "raw" WireGuard.

    Setup works well, although it's never been needed.

  • San Francisco Muni Railyard, 2020

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  • Trams, Trolleys and Streetcars @lemmy.blahaj.zone
    qjkxbmwvz @startrek.website

    San Francisco's historical fleet