A Recursive Process | A Recursive Process

Light Limaçons and Cardioids

February 24, 2012, 12:00 am

While putting away the bowls, I noticed some nice limaçons and cardioids made from the refraction of light.

Video of the changing shape – Limaçons

For more info:

25 Billion (From Dan Meyer) #anyqs

February 24, 2012, 12:00 am

Well? Live link: http://www.apple.com/itunes/25-billion-app-countdown/

For those (geeks) looking for more detail on how the rate is determined, you might be able to find the rate in the somewhat obfusticated javascript file found here: http://images.apple.com/global/scripts/downloadcounter.j...

Obsessions #anyqs

January 29, 2012, 12:00 am

Some more information can be found here (look in the description of the video). A second spoiler video can be found here.

Pole to Pole Run

January 24, 2012, 12:00 am

Pat Farmer, an endurance runner, set out to run from the North Pole to the South Pole to raise money for the Red Cross.

Utterly awesome.

So if he sets off on April 2nd, 2011 and he runs 16 miles a day on the snow, and 50 miles a day on roads and trails, then when will he reach the South Po...

Skallops – Geometry Heaven

January 12, 2012, 12:00 am

Skallops are a construction toy that uses laser (no sharks) cut wood clips to put together playing cards. They are up on kickstarter now and they can make some incredible shapes. I just ordered a set myself.

Paper #wcydwt

January 6, 2012, 12:00 am

Neat video:

Note: All photos were printed on recycled paper. Wasn’t that nice of them.

So how many photos? Answer found here.

IB Thoughts?

November 29, 2011, 12:00 am

So our school is looking into implementing the International Baccalaureate program at our school in addition (?) to our AP programs. I know little about IB, and I’m interested in your knowledge and opinions on the IB program. Lemme have it. Good stuff? Things to watch out for?

Fibonacci and Recursion

November 18, 2011, 12:00 am

To introduce the fibonacci sequence using the recursive series to my Pre-Calc H class (although most of them know it), I came up with something on the fly that worked nicely. To set up the fibonacci sequence, I showed them a recursive program that calcuates the sequence in a very clear (but ineffici...

Dr. Square

November 11, 2011, 12:00 am

Much like the Collatz conjecture, the Dr. Square Puzzle (from the blog mathforlove) is an intriguing problem.

With some playing around, we came up with what I think is an excellent (and solvable) puzzle. He dubbed it the Dr Square puzzle, because it involves one of the steps in taking the ...

Puzzler : 20,000 Lights

November 2, 2011, 12:00 am

From Car Talk.

RAY: This puzzler is from my “ceiling light” series. Imagine, if you will, that you have a long, long corridor that stretches out as far as the eye can see. In that corridor, attached to the ceiling are lights that are operated with a pull cord.

There are gazillions of them,...