Posts in category #demo
When you can’t say it with words, say it with a moving image. That’s bound to impress people. Posts in this category include some kind of interactive demonstration to mindlessly play with while you should be doing something else.
If you have a server that’s accessible from the internet, chances are you’ll be dealing with unwanted hacking attempts. Sometimes they’ll be security researchers trying to warn you about the existence of some vulnerability. Sometimes, they want to check if you’re accidentally running an open relay. Sometimes they’re actually nefarious people. And sometimes they just want you to subscribe to PewDiePie. Where do all these people come from?
A recent video by 3Blue1Brown (previously seen generating Pi from bouncing blocks) introduced me to an interesting problem from the 2011 International Mathematical Olympiad. The problem (described below) describes a windmill process where a line rotates through a cloud of points, switching pivots whenever it hits a new point.
The YouTube channel 3Blue1Brown recently uploaded a video where they give the following situation: we have two sliding blocks and a wall on the left. The first block starts out motionless, and the second block comes in sliding from the right.