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Joined 10 months ago
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Cake day: November 19th, 2023

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  • I ran out of crtcs, but I wanted another monitor. I widened a virtual display, and drew the left portion of it on one monitor, like regular. Then I had a crown job that would copy chunks of it into the frame buffer of a USB to DVI-d adapter. It could do 5 fps redrawing the whole screen, but I chose things to put there where it wouldn’t matter too much. The only painful thing was arranging the windows on that monitor, with the mouse updating very infrequently, and routinely being drawn 2 or more places in the frame buffer.



  • Modern operating systems have made it take very little knowledge to connect to WiFi and browse the internet. If you want to use your computer for more than that, it can still take a longer learning process. I download 3D models for printing, and wanted an image for each model so I could find things more easily. In Linux, I can make such images with only about a hundred characters in the terminal. In Windows, I would either need to learn powershell, or make an image from each file by hand.

    The way I understand “learning Linux” these days is reimagining what a computer can do for you to include the rich powers of open source software, so that when you have a problem that computers are very good at, you recognize that there’s an obvious solution on Linux that Windows doesn’t have.


  • Real everyone-eats-ice-cream-and-dances-all-day hasn’t been tried either. Just because you describe a set of circumstances doesn’t mean those circumstances can exist, and it especially doesn’t mean they can be stable long term.

    Scarcity is a fact of nature. You cannot rationally distribute scarce things without knowing people’s preferences, so you either need to continuously solve the economic knowledge problem (which requires a huge state apparatus, which will be taken over by a dictator), or a means of exchanging goods between people to better suit their preferences (at which point you have invented capitalism).



  • There’s a lot of answers here, but I don’t think anyone said the magic words. To reseason cast iron, you need an oil high in poly-unsaturated fatty acids. Those are the kind that can chain together, and form a good polymer coating.

    The thing that trips me up most about this subject is that 140 years ago, pork fat was very good for seasoning cast iron. Today, it isn’t, because the composition of the fat has changed significantly.

    The best seasoning coats will be thin, not appear or feel oily, give the pan a dark color slightly more glossy than an eggshell, and resist mild detergents, metal spatulas, and heat high enough to sear a steak on. If you have a layer of loose stuff in the pan, that’s just a layer of gunk, and is probably adding some weird flavors to anything you cook.







  • I’m ignoring many factors for the sake of being able to answer. There are some kinds of heating, especially using burning fuels that are nearly 100% efficient, but we don’t know why it needs to get to that temperature, or how long it needs to stay that hot - so even if the transfer of heat is 100% efficient, this computation may underestimate the actual needs.


  • prime_number_314159@lemmy.worldtoMemes@lemmy.mlCheckmate
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    8 months ago

    You have 3 liters of water heating up by 50 degrees celsius. It takes 4184 joules to heat 1 liter of liquid water by one degree Celsius, so it takes 627600 joules to heat 3 liters by 50 degrees. Dividing by 40000 joules per gram of fuel, it will take 15.69 grams of fuel per minute. Finally, for significant digits, we have to round to 16. grams of fuel per minute.

    Edit: for most sciency uses, 1.6 times 10^1 grams of fuel per minute is likely the preferred way to write that.




  • I had to read Shakespeare, then read another book about how witty and clever it was to the people of the time, then write a report about how witty and clever it was, once I understood the historical context. My conclusion that having to explain jokes is the death of humor got me a C-.


  • prime_number_314159@lemmy.worldtoMemes@lemmy.mlTrig
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    9 months ago

    1209 is 3 times 13 times 31, and cats are better at typing than they are at math.

    In base 10, the sum of the digits of any number that is divisible by 3 is also divisible by 3, so 1+2+0+9=12, implies 1209 is divisible by 3.

    Likewise, 1001 is divisible by 13, so if you split a number in base 10 every 3 digits, and subtract/add alternating sets of numbers, if the result is divisible by 13, the original number is, too. 209-1 is 208, which is obviously divisible by 13, so 1209 is, too.

    Divisibility by 31 in base 10 is harder to check, but 999998 is divisible by 31, as is 999999999999999, so you can just split the number every 15 digits, and add those together, and if the sum is divisible by 31… I’m talking about math to a cat.




  • In order to collectively own everything, you must have a mechanism to decide the use of the means of production. Some things can be produced, but should not be, and leaving it up to local decision making will produce imbalances, as things that are easier or more fun to produce are produced more often than required.

    You need a central nexus of control, and a person or group of people to be the final arbiter of decisions. Every time it’s been done in history, either the leaders of the revolution, or the people violent and powerful enough to stab them in the back and take control have landed in this position. Mysteriously, a small group of people controlling all production has only ever lead to tyranny.

    Any communism that begins in revolution will devolve into tyranny, and there’s no words a dictionary can string together that will change that. Voluntary communes also seem to have problems, but it’s more often splintering, which is significantly less harmful.