Professional industrial and jewelry designer (here’s my Bēhance portfolio), hard-sci-fi enjoyer, cat lover and procrastinator. Started a few communities on kbin: Urban Details, Industrial Design and Jewelry Design, feel free to join if you find those interesting.
You can tip me if you like or use something I made.

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Joined 1 year ago
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Cake day: July 1st, 2023

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  • Reposting my comment from another thread to add a bit of context in case anyone’s curious.

    So I read the paper, and here’s a tldr about how their material apparently gains its properties.

    It is hypothesized that superconductivity properties emerge from very specific strains induced in the material. Hence why most of the discovered superconductors require either to be cooled down to very low temperatures, or to be under high pressures. Both shrink the material.

    What this paper claims is that they have achieved a similar effect chemically by replacing some lead ions with copper ions, which are a bit smaller (87 pm for Cu vs 133 pm for Pb). This shrinks the material by 0.48%, and that added strain induces superconductivity. This is why it apparently works at room temperature — you no longer need high pressures or extreme cold to create the needed deformation.

    Can’t really comment on how actually feasible or long-lasting this effect is, but it looks surprisingly promising. At least as a starting point for future experiments. Can’t wait for other labs’ reproduction attempts. If it turns out to be true, this is an extremely important and world-changing discovery.

    Fingers crossed :)



  • As was mentioned in another comment, it’s a statistical term that measures the standard deviation. It basically tells you how “far” from the center of the bell curve you are with your data points. The higher the sigma, the less likely it is that an observed event was a fluke.

    For example, 1-sigma event has a ~37% chance of being a “coincidence”, and 2-sigma has a chance of about 4.5%.

    In science, 3-sigma (0.135%) is the first publishable certainty, it’s when something becomes significant enough to start a discussion.

    And 5-sigma is the most common threshold for claiming discovery. 5-sigma events have a 0.0000287% chance of being a coincidence or some random happenstance. Or one in 3.5 million.

    Higgs boson discovery was announced after 5-sigma certainty was reached. It means that if that particle didn’t actually exist, the chance of the experiments producing observed results would be 1 in 3.5 mln.