I waddled onto the beach and stole found a computer to use.

🍁⚕️ 💽

Note: I’m moderating a handful of communities in more of a caretaker role. If you want to take one on, send me a message and I’ll share more info :)

  • 70 Posts
Joined 1 year ago
Cake day: June 5th, 2023

  • Do you have a link to the survival PDFs? I’m curious

    I have a few apps like that installed, such as first aid for example. Might as well get some useful guides on my USB in case my phone is dead.

    Also my recommendation

    • portable programs. Pick some that might be useful and add those. I have never had to use one, but I keep them anyways

    • Some media to pass the time. This has come in handy once or twice

    • extra space for large file transfers

  • Otter@lemmy.caOPtoProgramming@programming.devThe Illustrated AlphaFold
    7 days ago

    Who should read this

    Do you want to understand exactly how AlphaFold3 works? The architecture is quite complicated and the description in the paper can be overwhelming, so we made a much more friendly (but just as detailed!) visual walkthrough.

    This is mostly written for an ML audience and multiple points assume familiarity with the steps of attention. If you’re rusty, see Jay Alammar’s The Illustrated Transformer for a thorough visual explanation. That post is one of the best explanations of a model architecture at the level of individual matrix operations and also the inspiration for the diagrams and naming.

    There are already many great explanations of the motivation for protein structure prediction, the CASP competition, model failure modes, debates about evaluations, implications for biotech, etc. so we don’t focus on any of that. Instead we explore the how.

    How are these molecules represented in the model and what are all of the operations that convert them into a predicted structure?

  • As humanity aspires to explore the solar system and investigate distant worlds such as the Moon, Mars, and beyond, there is a growing need to establish and broaden coordinate time references that depend on the rate of standard clocks. According to Einstein’s theory of relativity, the rate of a standard clock is influenced by the gravitational potential at the location of the clock and the relative motion of the clock. A coordinate time reference is established by a grid of synchronized clocks traceable to an ideal clock at a predetermined point in space. This allows for the comparison of local time variations of clocks due to gravitational and kinematic effects. We present a relativistic framework to introduce a coordinate time for the Moon. This framework also establishes a relationship between the coordinate times for the Moon and the Earth as determined by standard clocks located on the Earth’s geoid and the Moon’s equator. A clock near the Moon’s equator ticks faster than one near the Earth’s equator, accumulating an extra 56.02 microseconds per day over the duration of a lunar orbit. This formalism is then used to compute the clock rates at Earth-Moon Lagrange points. Accurate estimation of the rate differences of coordinate times across celestial bodies and their inter-comparisons using clocks onboard orbiters at relatively stable Lagrange points as time transfer links is crucial for establishing reliable communications infrastructure. This understanding also underpins precise navigation in cislunar space and on celestial bodies’ surfaces, thus playing a pivotal role in ensuring the interoperability of various position, navigation, and timing (PNT) systems spanning from Earth to the Moon and to the farthest regions of the inner solar system.

  • At some point I think I’m going to write a post about nice behaviour here. I have to think about it some more… And this is a diverse place anyways, other people might like different things.

    I’d read something like that :)

    Sometimes we also don’t think about how we could be doing something better. Another thing that comes to mind, which I sometimes forget, is upvoting the post that you are commenting on. Usually if I’m commenting, I want more people to see and join the discussion, but I forget to upvote before leaving the tab

  • Didn’t notice this was already posted, here’s another link / quoted content


    Russian satellite breakup sends ISS astronauts to shelter

    On Wednesday, June 26, 2024, shortly after 9 p.m. EDT, NASA instructed the nine astronauts aboard the International Space Station to head to their shelters. This precautionary measure was in response to the breakup of a Russian satellite, RESURS-P1. The astronauts spent about an hour in their shelters before it became clear the space station was not in the path of the debris.

    More on RESURS-P1

    According to Leo Labs, a California company that provides collision avoidance service and real-time conjunction alerts for satellite operators:

    The approximately 6,000 kg [13,000 lb] satellite was in a nearly circular orbit at about 355 km [220 miles up] at the time of the event.

    While it is not yet clear what caused the breakup of the Russian satellite, the satellite ended its service back in 2021. So what was previously one defunct space object is now more than 100 pieces. With the increasing amounts of satellites, both operational and past their useful lives, accumulating in orbit, the crowded space around Earth is becoming more and more of a concern. According to the Orbiting Now website, there are currently more than 10,000 active satellites in orbit around Earth, with nearly 3,000 inactive satellites still in orbit.