Shae is doing another Hamming reading group.
Henrici’s harmonic analyzer, the one Tatjana van Vark’s is based on.
“Suppose I wanted to argue that mice were larger than grizzly bears. I note that both mice and elephants are “eargreyish”, meaning grey animals with large ears. We note that eargreyish animals such as elephants are known to be extremely large. Therefore, eargreyish animals are larger than noneargreyish animals and mice are larger than grizzly bears.
As long as we can group two unlike things together using a made-up word that traps non-essential characteristics of each, we can prove any old thing.” #epistemology
#Israel #drones destroy two F-14 airplanes in #Iran. #weaponry #politics
Copilot stops working on gender related subjects. #neural-networks #humor
#video of an hour of instrumental rock #music on piano, starting with “Nothing Else Matters”, then “Listen to Your Heart”, “Du Hast”, “Zombie”, “The Unforgiven”, “Over the Hills and Far Away”, “Smoke on the Water”, “In the End”, “Eye of the Tiger”, etc.
#video of #bootstrapping a #CNC mill under AU$500 with a focus on rigidity and a small footprint with #3D-printing, using a non-gantry design to improve rigidity. A steel Allthread skeleton is wrapped in 3-D printed forms for the concrete, PLA with seams sealed with superglue. I don’t really understand how the threaded inserts in the concrete work; maybe the screw presses the 3-D printed plastic out against the concrete walls? He uses a vibrating sander as his vibrator for the concrete pour; after initial one-hour set, scraping with a spatula removes excess concrete. He says “non-gantry” but he’s using two sets of two parallel linear rails for the X and Y axes; it’s just that he’s moving the workpiece with anti-backlash-spring-loaded leadscrews rather than the toolhead. He’s also just using NEMA 17 steppers instead of real servos. #manufacturing
#manufacturing #3D-printing #video by #Sanladerer on including formable ribs or ridges running the length of 3-D printed plastic holes as “self-forming threads” to allow M3 machine screws to reliably form threads in them, contrasting with other options like heat-set inserts, “prong nuts”, and inserted hex or square nuts.