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Cake day: March 3rd, 2024

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  • I don’t always care about the specific thing very much, but I have learned to recognize when someone wants to share their life experience. And they’ve chosen to share their life experience with me. It takes a bit of extra effort, in an “Okay, what about any of this interests me, so I can ask questions from that perspective,” but I’ll always try to find something to say that makes the other person feel appreciated for sharing. Because it’s probably not that they want me to “see what they’ve done” and more that they want to engage on a personal level with another human being.

    It’s a lot easier for me to support that engagement when I look at the interaction through that lens. I don’t always get opportunities to engage like that with other people, and it’s probably healthy for me to accept those opportunities when they come.













  • Nougat@fedia.iotoScience Memes@mander.xyzWhere does the music go?
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    4 days ago

    Don’t forget the inverse square law. Even without a change in medium or any obstacles, the strength of the signal decrease over distance until it is undetectable.

    This is also why there are no extraterrestrial civilizations hearing any radio broadcasts from Earth. Our transmitters are so weak that any signals we send out fade into the CMB before they get any real distance.




  • The millions of simulations were spread across the various possible combinations within this framework. As a whole, the results form a rough map of all conceivable outcomes, like a vast tapestry woven from the threads of initial configurations. This is where the isles of regularity appear.

    The colors represent the object that is eventually ejected from the system after the encounter. In most cases, this is the object with the lowest mass.

    “If the three-body problem were purely chaotic, we would see only a chaotic mix of indistinguishable dots, with all three outcomes blending together without any discernible order. Instead, regular ‘isles’ emerge from this chaotic sea, where the system behaves predictably, leading to uniform outcomes—and therefore, uniform colors,” Trani explains.

    The full paper is here: https://www.aanda.org/articles/aa/full_html/2024/09/aa49862-24/aa49862-24.html

    From what I gather, they’re looking at the trajectories of the first object ejected from the system over all of the simulations, and they’re finding that:

    If the 3BP was fully ergodic, we should see a mix of colours everywhere, but instead we observe four large regions of uniform colours, two large ones at ι ~ 80° and 260°, and two small ones at ι ~ 175° and ι ~ 355°, that we term regular islands.

    https://www.aanda.org/articles/aa/full_html/2024/09/aa49862-24/F3.html

    All of those colors on those images are dots, each one representing the outcome of a simulation. The large single-colored areas shouldn’t exist if 3BP were truly chaotic and unpredictable. Furthermore, you can see some “finer structures that look like narrow stripes.”