πfs – the data-free filesystem!
πfs is a revolutionary new file system that, instead of wasting space storing your data on your hard drive, stores your data in π! You’ll never run out of space again – π holds every file that could possibly exist! They said 100% compression was impossible? You’re looking at it!
2048 has to be one of the most addictive games ever! It’s like a mix of tetris, 15 and sudoku – all in one. There is also the adult edition (NSFW).
Here is an excellent visualization of 2 to the power of 100. If you take a piece of paper which is 0.1 mm thick, cut it in half and place one half on top of the other, then cut the stack in half and place half over the other half, and then repeat it 98 more times … how high is your stack of paper going to be? Think. BOOM! 13.7 billion light years. Here is a breakdown of how fast it gets there.
Drilling Square Holes
A bit that drills square holes … it defies common sense. How can a revolving edge cut anything but a circular hole? Not only do such bits exist (as well as bits for pentagonal, hexagonal and octagonal holes), but they derive their shape from a simple geometric construction known as a Reuleaux triangle (after Franz Reuleaux, 1829-1905).
Wikipedia has some more info on Reuleaux triangle.
Vector space model
I used the vector space model about a decade ago when I worked on the simple search engine for the company documents. Today the subject came up in the conversation and I was surprised as to how quickly I remembered this. I still think that this is rather elegant.
If you are a beer fan, you’ve probably heard about the famous Guinness bubbles problem. While bubbles in most other beers rise up, in Guinness they go down. A lot of people were puzzled by that fact, and now, it seems, the puzzle is solved.
According to the article in Technology Reviews, Irish mathematicians came up with an answer:
Today, a dedicated team of Irish mathematicians reveal the answer. Eugene Benilov, Cathal Cummins and William Lee at the University of Limerick say the final piece in this puzzle is the shape of the glass, which has a crucial influence over the circulatory patterns in the liquid.
To understand how, first remember that the motion of every bubble exerts a drag on the liquid around it. Now imagine what would happen if there were a region of liquid containing fewer bubbles near the wall of a pint glass and consequently a region of higher bubble density near the middle of the glass.
Benilov and co say that the drag will be higher in the region where the bubble density is higher, in other words near the centre of the glass. This creates an imbalance that sets up a circulation pattern in which the liquid flows upwards in the centre of the glass and downwards near the walls.
That’s exactly as observed in a pint of Guinness.
There are more details and image of an anti-pint in the article. Read it.
Also, while reading up on the subject, I’ve learned something else about Guinness – the widget.