# Archive for February, 2008

## Water from the air using windmills

## Sine wave in the sky over Singapore

## Friday Math movie - Powerup Game

A new game from IBM has a good environmental outcome as players need to save a virtual planet from near ecological doom.

## Yahoo and Google - who has the youngest audience?

A comparison of Google and Yahoo search results refutes the claim that Yahoo draws more younger searchers.

## The IntMath Newsletter - Feb 2008

In this Newsletter

1. Changes to the IntMath Newsletter

2. Real life math example - CO2 levels in the atmosphere

3. This month’s math tips - Divisibility

4. Poll Results

5. More from the math blog

## Friday math movie - string theory

String theory suggests that the building blocks of the universe are one-dimensional vibrating strings, rather then zero-dimensional points.

## Earth killer - composite trigonometry CO2 graph

Here's a satisfactory attempt to model the Earth's increase in CO2 concentration, using Excel and Scientific Notebook.

## Friday math movie - The Amazing Abacus

The abacus is still widely used in Japan. It's one method of making math more kinesthetic - and it's often faster than a calculator.

## Full archive

See the blog sitemap for all previous articles.