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Cake day: October 18th, 2023

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  • birbs@lemmy.worldtoScience Memes@mander.xyzCAW
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    7 days ago

    I doubt this is AI. This looks right for a micro-CT angiograph.

    The blood vessels will have X-ray opaque dye injected, so they stand out on the CT. You can then set a threshold in the visualization software to filter out other tissue. The software then uses an algorithm to apply some shading to the surfaces of the unfiltered tissue to create a 3D effect.

    The red colouring is a choice of the user, it just colours darker parts red and fades out to transparency.








  • Human terminal velocity is roughly 56 m/s. Let’s say our superhero wants to decelerate the person at 10G, which should be survivable for a short period. That would be 0.6 seconds of deceleration over 48 m. That’s a short time but quite a long distance, let’s slow down faster:

    20G -> 0.28 seconds, 24 m.

    30G -> 0.19 seconds, 16 m.

    50G -> 0.11 seconds, 9.6 m.

    100G -> 0.057 seconds, 4.79 m.

    200G -> 0.029 seconds, 2.45 m.

    5000G -> 0.0011 seconds, 3.6 inches.

    A 40 mph car crash in a modern car into a solid wall gives around 15G.

    F1 driver David Purley survived a 180G crash in 1977.

    In short, I don’t recommend catching someone with 3 inches to spare.



  • As a software developer I promise you that software development is very much not an exact science.

    Programs are complex and there are so many different ways of achieving the same thing that all code has problems and gets a bit messy in places. You can test, but it’s not easy to ensure that everything works the way it should.

    The best code you’re going to get will probably be in the space industry, but even that will have bugs. The best you can do is make the code robust even when bugs make things go wrong.

    In many cases copilot will do just as well as a junior developer. It’s very good at repetitive tasks and filling gaps in your existing code.




  • This headline is sensationalized. Only the blood flow to the brain was isolated from the rest of the body, and the brain was not removed during the procedure (it was removed post-mortem to study how the procedure affected the brain).

    The main purpose of the study was to separate blood flow to the brain from the rest of the body to make it easier to test the effect of drugs on the brain, without having the rest of the body’s response to the drugs interfere with the results.

    Since the process is similar to the heart lung bypass which is already used on humans during heart surgery, this research may eventually lead to better heart lung bypass methods. The current methods can cause problems in the brain for a few reasons including differing blood flow, air and particles getting into the blood, and the body’s inflammation response.

    Source: PhD in this area.