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Cake day: June 22nd, 2023

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  • Blue light gets scattered more by the atmosphere. So less blue light is received directly in a straight line from the sun and more is reflected from other parts of the sky. That’s also why the sky looks blue in the day and why the evening sky looks red (if the sun is very low during the evening, the blue light can’t reach you because it scattered so much due to the very long shallow way through the atmosphere)




  • morhp@lemmy.wtftoMemes@sopuli.xyz🐬🐬🐬
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    10 months ago

    “most” would be an exaggeration, but many are. Other animals commonly used in placeholder names are also horse, chicken and lion.

    Pig was just the most common meat animal, so any unknown animal that you’d eat would he called an xyz pig. Apple was also used like this for all kinds of fruits and vegetables:

    orange = Chinese apple

    tomato = golden apple (?)

    pomegranate = granate apple

    potato = earth apple

    jimsonweed = thorn apple

    And so on




  • For modeling I like Freecad and Blender. Blender is more for general modelling and sculpting, Freecad is more for cad/constraint based creation of precise 3d models. So use blender if you want to create little soldiers or elephants or other more organic stuff, and use Freecad if you want to print a replica of a plastic part or an enclosure or something like that.

    There should be tons of slicers available on Linux.


  • Yes, it’s very efficient and the core of what complession formats like .zip do.

    The main difference to your idea is that computers count in binary like 0, 1, 10, 11, 100, 101 and so on and that you don’t want to assign these very low codes words directly. Say you’d have assigned 1 the most common word, then that will would be encoded very short, but you’d sort of take the one away from all the other codes, as you don’t know if 11 is twice the most common word or once the 11th (3rd in decimal) common word.

    Huffman essentially computes the most optimal word assignments mathematically.

    The main other difference between your suggestion and most compression algorithms is that you wouldn’t use a huge dictionary in real time and loading it and looking into it would be very slow. Most compression algorithms have a rather small dictionary buildin and/or they build one on the fly looking at the data that they want to compress.


  • morhp@lemmy.wtftoLinux@lemmy.mlOLED on Linux?
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    11 months ago

    I always thought hdr was more of a preprocessing step to prevent clipping unrelated to display tech.

    That’s tone mapping, HDR is actually having more than 8 bits and often also more colorful colours than normal. I think 10 bits are common.




  • I’m not saying that support is lacking, all I’m saying is that you have to have complete trust in a company on the other side of the globe, because all the warranties and promises they give you are completely based on their good will. If they decide to stop supporting you for whatever reason, you pretty much have no leverage.

    I live in Germany near the Netherlands border. Moving between countries is very common here because of different living costs and job opportunities and losing support because you move a few km west or east is not acceptable in my opinion.


  • morhp@lemmy.wtftoLinux@lemmy.mlSystem76 or Framework laptop?
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    1 year ago

    However with Framework you still need to be careful in Europe. It’s an US based company and if you have a defect or problem that Framework for some reason doesn’t resolve, good luck trying to enforce your EU customer protection or suing them in the US.

    Framework is also very strict regarding unsupported countries. If you move within the EU to a country that isn’t supported by Framework, you’ll have big problems with support in case you need help or parts or whatever.




  • In most cases it will work fine as the first thing a good power supply does to the incoming electricity is converting the AC to DC using a full bridge rectifier. If you already supply DC, the current will just flow through it without a problem and the power supply simply continues to do its stuff.

    However note that the DC input voltage needs to be relatively high. About sqrt(2)~=1.4 times as high as the rated AC voltage should be fine. So if you have a power adapter that’s rated for 120 to 240 VAC, you should give it something between 170 and 340 VDC. This is obviously very high (and dangerous). Plugging in a normal car battery or the output of a usb charger or something like that will likely do nothing.