December 13, 2013

Advent Chemistry: Magnetic balances

One of the more curious devices in a chemistry lab is the magnetic balance. This is an extremely precise balance – as in, accurate to the nearest hundred thousandth of a gram or closer – with an electromagnet underneath. The balance lives in a nearly...

A green steam train

Advent Computing: Threads, trains and tortured analogies

Imagine you’re running the train network. You have a whole bunch of train tracks, a whole bunch of people to get from one place to another, and just one train to do it with. Simple, right? Move your train from place to place, and let...