The challenge of HEPA filters in the classrooms.
h/t @…
source: https://xcancel.com/kadamssl/status/1938267359233429683#m
Very-wide-orbit #planets from dynamical instabilities during the stellar birth cluster phase: https://www.nature.com/articles/s41550-025-02556-0.epdf?sharing_token=07nttbmFtVszXJ9WE08RxtRgN0jAjWel9jnR3ZoTv0MyXOZR8fWrHBDqi9KSRr7ViBNJi6GFT53TUVgvJ1B3VveocLbxO4ZozqBf6LZNW3K_f7aYzkdGgIFmB0m4-2aBxfXFa9fDKzzVH0FfTaxXSUdFS9nXub04UznBKzlaZAE= -> long thread: https://bsky.app/profile/sethajacobson.bsky.social/post/3lq6bvygkfs2f
some chinese folk religion planchette writings say new hells (like with punishments for sins involving reckless driving) or existing hells (such as the "hand-searing hell" (烙手指小地獄) initially used clothes irons to sear sinners' hands, but now modernized their punishment by searing the sinners' hands on iron rails tied with springs) are created as the world changes
Physics Will Cause the Economy to Shrink; a Look at the Next Ten Years
Our Finite World https://ourfiniteworld.com/2025/05/27/economic-contraction-coming-right-up/
College Board Keeps Apologizing for Screwing Up Digital SAT and AP Tests (Ars Technica, 24 May 2025)
https://arstechnica.com/culture/2025/05/college-board-keeps-apologizing-for-screwing-up-digital-sat-and-ap-tests/
I did some experiments measuring propagation delay in a simple chain of 3 digital inverters (NOT gates) (74LS04).
I'm honestly not sure my entry-level scope is fast enough to accurately measure this, but it's fun to try.
It's also interesting to watch the signals completely freak out when you change the input voltage too slowly, but I didn't make a screenshot of that.
#electronics
A couple of folks said I should replace the pop-over email signup form on my blog with a much more subtle inline signup form at the top of the page. So! If you'd like to reward the more user-friendly design with your patronage and support (it's free, I only ask for your attention), you can sign up to get my new posts in your inbox just by sharing your email address. I won't spam you or sell your email, and don't post too often.
Sources: Instagram and TikTok are working on versions of their apps customized to run on TV screens, following YouTube's success in attracting a TV audience (The Information)
https://www.theinformation.com/articles/tiktok-instag…