Category Archives: Computer

Bitcoin and the blockchain

Two interesting articles from this week’s Economist:

The promise of the blockchain: The trust machine. “The technology behind bitcoin could transform how the economy works”.

Blockchains: The great chain of being sure about things. “The technology behind bitcoin lets people who do not know or trust each other build a dependable ledger. This has implications far beyond the cryptocurrency”.

Per Anhalter durch Deutschland

HitchBOT – A robot exploring the world

“I am hitchBOT – a robot from Port Credit, Ontario. From July 27, 2014 to August 21, 2014, I hitchhiked over 6,000 km from Halifax, Nova Scotia to Victoria, British Columbia. In just 26 days I hitched a total of 19 rides to reach my final destination – Victoria, British Columbia. […] This February, my adventure continues as I explore Germany. My journey will begin in Munich on February 13, 2015 and conclude in Munich on February 22, 2015. […] Join me as I learn more about Germany, including the people, language, and culture.”

I’d love to give HitchBOT a ride if he visits Palatinate!

Tool Unlocked: Equilateral Triangles

Euclid is a game of geometry played in your browser.”

Link via MetaFilter.

If you’re a math teacher, you don’t just waste time playing math games online, you test it thoroughly for using in a lesson. By that definition, I’ve been working for the past 30 minutes or so, completing all the levels (20 so far) of Euclid: The Game.

I think I’m going to have my students play this game in one of the final lessons before the summer holidays start, when motivation usually is at an all-time low. It’s in English, but the vocabulary shouldn’t be too hard to pick up.

Good old times…

Back in the late 1980s my father bought his first computer, a Commodore PC20-III. I remember playing “Reflections” on it, a game in which you had to direct a laser beam using mirrors, splitters etc. to hit several light bulbs. I just found a flash version of the game: Laser Reflections. Of course, back then there was no cheating by looking up the passwords and solutions for each level on the internet because there was no internet, but at least it was one of the games where it didn’t matter much that the monitor was just black and white. ;-)