To add to this excellent xkcd comic, the following site also exists : Password Haystacks. Which is a stronger password? T@+t0O or dudewhatdoesmytattoosay (Click to find out, I’ll wait). Pretty sweet indeed. What a difference. Anyways, the reason I’m linking this stuff is that this would make a great lesson in exponents. While the […]

## Hurricane Irene – Logarithmic Spiral?

Does Hurricane Irene fit a logarithmic spiral? I made a Geogebra applet to see if it does. Enjoy. Parametric equation:

## Python Challenge

Python Challenge is a “programming riddle” on the internet. What is the Python Challenge? The Python Challenge is a set of riddles that require a little bit of Python programming to be solved. The solutions are entered by changing the address of the page (URL). You get used to the idea pretty fast after […]

## Transport \$12 billion of gold #anyqs

From Bloomberg: Venezuelan President Hugo Chavez ordered the central bank to repatriate \$11 billion of gold reserves held in developed nations’ institutions such as the Bank of England as prices for the metal rise to a record. Venezuela, which holds 211 tons of its 365 tons of gold reserves in U.S., European, Canadian and Swiss banks, will progressively return the bars […]

## Changes to Intro to Computer Programming

This will be my third year teaching Introduction to Computer Programming. The first year I had 15 students which was a good showing, but last year I only had 5 students. It turned out to be a scheduling issue, but I was still worried about the health of the course, and whether or not it […]

## Why Hello…

I’m updating the hosting of the blog (among other things), so please stay tuned. Cheers. Dan.

## Teachers and Jobs Outside the Classroom Poll

@fnoschese retweeted the following stat on twitter: It seemed a bit low to me, so naturally I started a totally unscientific poll. Please go here and fill out at least one of the questions. The results will be posted back here in a couple of days. Thanks much. Dan https://spreadsheets.google.com/spreadsheet/viewform?formkey=dFVUTl9HXzNTaDRvUTN5RGxjOE5BVWc6MQ#gid=0

## One Zipper Unfoldings of Polyhedra

From Make. Just discovered this fascinating little geometrical recreation at the 2011 Bridges Math Art Conference galleries. The idea is simple, and the field still fairly unexplored, from what I can tell. What interesting 3D shapes can be made by zipping up the edges of a planar shape using a single zipper? A bit of Googling […]