When I was in school I used to spend a lot of my time making games in Blitz Basic (and later BlitzMax). Eventually, as I got older and more boring, I ran out of ideas and started doing other things. …

## Archives for videos

### Using a zero-knowledge protocol to prove you can solve a sudoku

I’ve just uploaded to youtube a video I made with Katie Steckles to demonstrate why zero-knowledge protocols exist and how one works.

[youtube http://www.youtube.com/watch?v=i0sffXfDCUI]

Katie is a habitual liar, so we followed the zero-knowledge protocol described in the paper, “Cryptographic …

### The Ace of Base(-three numbers) trick

This trick was shown to me by one of the excellent MathsBusking people. They didn’t explain why it works or how to generalise it to other numbers of cards, so I did a bit of thinking and then I made …

### Resources for first-year engineers

Maths-Aid, the drop-in maths help service at Newcastle University where I do a bit of work, commissioned some worksheets and accompanying videos for engineers, to be completed over the Summer. The idea was that they would cover the most …

### A gimmicky Normal PDF visual aid

Quite a lot of people have trouble visualising what’s going on when you look up p-values in a table of the normal CDF. I had an idea about how to explain a bit more dynamically using a bit of Craft …

### How to make a Slinky look like a Klein bottle

Edmund Harris mentioned on Twitter that a Slinky can make a very good model of a Klein bottle. Elin Roberts asked for an explanation, and I was curious too, so I did a bit of rummaging and found my old …