Life & fun · September 22, 2017
pop.in
The chat room, reinvented – topical, never empty and live
What it does
A pop.in is a spontaneous real-time gathering of people around topics they care about. It opens once multiple people want in on a conversation and when everyone leaves, the pop.in is over. You can start your own pop.in or find pop.ins where people are talking about the things that matter to you.
Does the same job
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
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