• 0 Posts
  • 72 Comments
Joined 2 years ago
cake
Cake day: August 20th, 2023

help-circle






  • Brain blackout is kind of a dramatic word. I’m pretty sure the article is trying to refer to cortical spreading depression.

    https://www.nature.com/articles/nrneurol.2013.192

    This is a wave of decreased activity going across the brain. It’s not the whole brain though, just a portion, and it tends to happen more often in the posterior brain than anterior. That’s why visual and other sensory auras (posterior brain) auras are more common than motor/weakness auras (anterior brain). The visual aura itself is the spreading wave of decreased activity going across the brain. It happens in primary visual cortex, primarily dealing with lines and colors. Visual space is represented radially on the brain, so it can often be circular. The “fortifications” or lines on the edges some people see come from the fact that it’s neurons that deal with line detection. Pain usually follows shortly after, but we aren’t exactly sure how that works, and this article was posing a possible mechanism to help link these. The main bulk of the visual aura where it’s grey, blurry, and indistinct is the decreased activity itself in the visual cortex. The area can get larger as the wave spreads.

    Deja vu or jamais vu have been reported with migraines, though that’s a very rare aura in comparison. It’s all depending on what parts of the brain are involved with the cortical spreading depression for that migraine aura for that person in terms of what symptom will happen. Deja vu would be more temporal lobe. Temporal lobe is the most common localization for focal epilepsies. So deja vu as a symptom of a neurologic disease would more commonly be seen with seizures (focal seizures are sometimes called auras too, which gets confusing but are inherently different from what is happening in a migraine). But don’t worry, most deja vu is nothing to worry about.






  • That the eye can only perceive 24 fps is a myth. Plus vision perception is very complicated with many different processes, and your eyes and brain don’t strictly perceive things in frames per second. 24 fps is a relatively arbitrary number picked by the early movie industry, to make sure it would stay a good amount above 16 fps (below this you lose the persistence of motion illusion) without wasting too much more film, and is just a nice easily divisible number. The difference between higher frame rates is quite obvious. Just go grab any older pc game to make sure you can get a high frame rate, then cap it to not go higher to 24 after that, and the difference is night and day. Tons of people complaining about how much they hated the look of Hobbit movie with its 48 fps film can attest to this as well. You certainly do start to get some diminishing returns the higher fps you get though. Movies can be shot to deliberately avoid quick camera movements and other things that wouldn’t do well at 24 fps, but video games don’t always have that luxury. For an rpg or something sure 30 fps is probably fine. But fighting, action, racing, anything with a lot of movement or especially quick movements of the camera starts to feel pretty bad at 30 compared to 60.





  • I wouldn’t have wanted to buy anything either. It’s actually slightly more progressive than most ipo’s in that sense though since it offered a chance to buy shares directly, but that’s not really saying much. A true public offering would allow anyone to place orders as a part of the initial sale. Usually just large financial institutions have the chance and then the price is very inflated by the time most retail traders would be allowed to buy. If we really want to help the rampant wealth inequality in the economy too, there should me some mandated equity that goes to employees whose labor built the company so everyone, and not just the board and a few venture capitalists, can profit from the stock sales. Which I guess is a roundabout way of saying workers should own the means of production. It doesn’t make sense to reward only so few for the work and ideas of so many individuals. And I think it’s a huge inefficiency in the economy that is detrimental no matter your view point (unless you’re a billionaire company founder who doesn’t care about the country, economy, or world as a whole I guess).


  • There’s a lot of confused people in these threads. Steve Huffman sold 500,000 shares as part of the ipo, so they were some of the shares sold immediately before they opened on the market (at the about $30/share price). He still holds 4.1 million shares. Other insiders sold some shares as well. Some shares were created to raise money for the company. Once the ipo actually happens and the price for all those shares is negotiated with the bank assisting and all initial buyers, then it begins trading on the open market. At that point they are in a lockup period, and they can’t sell anything for about 180 days. All of this is in sec filings, where you can see the source of all the shares that were part ot the ipo.

    Look I hate Steve Huffman too, I’m here on lemmy after all. But this is a grossly over valued tech stock and there hasn’t been many tech ipos in a while. It’s very not surprising it would start sinking after an initial explosion of buying activity. It’s not dropping from insiders unloading stock right now though. They’re in lockup.



  • Ranvier@sopuli.xyztoComic Strips@lemmy.worldXXX
    link
    fedilink
    arrow-up
    11
    arrow-down
    3
    ·
    edit-2
    1 year ago

    Depends on language and culture and context. In the United States we use America to refer to the country and North America and South America to refer to the continents. Many Latin American countries use a six continent system though, where North America and South America are just one continent called America. This can lead to some tension and confusion when people from the United States call themselves American, since that would imply everyone in the western hemisphere to them basically. While sometimes “Americano” is used to refer to people from the United States, you’ll also you get descriptors like “estadounidense” in Spanish for this reason. Though this also has ambiguity, since technically Mexico is also a “united states.”

    Anyways, point is, a seven continent system with the western hemisphere separated into north and south America isn’t used everywhere, for some people America is a continent. In some places Europe and Asia are combined, and there’s other variations too. None of them line up with plate tectonics or anything perfectly, so they’re all a little arbitrary in the end.

    https://en.m.wikipedia.org/wiki/Continent