Bits and Pieces: Secrets of a Digital World
The presentation is a look at the maths behind how we send messages on the internet.
We will look at how photos, videos and messages are turned into 1s and 0s, using binary numbers, and then transmitted.
We will introduce Hedy Lemarr, the woman who invented frequency hopping, an idea we still use in WiFi today.
We will look at how secret messages were sent in World War II, using a machine even more secure than Enigma - and how that code was finally broken.
And we will look at error correction, which allows you to fix mistakes in your messages.
There are several demos of the ideas presented, with opportunties for volunteers to come up and help.
In the final demo I will drill a hole in a CD, live on stage, and show how error correction means the CD will still play.
Our aim is to inspire and motivate students in mathematics. We will show the application of mathematical ideas such as binary numbers, error correction, codes and code breaking, and mathematical thinking. And hear the inspiring stories of the men and women who invented them.
The presentation is 45-60 minutes.
The talk is suitable for UK and non-UK schools, as well as maths clubs, maths societies, colleges, universities and online.
Dr James Grime is a mathematician and public speaker. James travels the world giving public talks on the history and mathematics of codes and code breaking. James is also a presenter of the YouTube channel numberphile.
The fee for a half day (one or two presentations) is £465.
Travel and accommodation in the UK is typically £140.
The talk is also available online (via Zoom, Teams etc) for £325.
The STEM Directory is provided as a service to support you in finding enrichment opportunities. The activities are offered by external providers and are not endorsed by STEM Learning. We are not responsible for their content or delivery.
|Published||13 September 2021|
|Last modified||14 September 2021|
|Nature of scheme||In-school visit|
|Category||Lecture / Talk|
|Age||11-14, 14-16, 16-19, FE/HE|
|Running times||Less than 1 hour|
Fee is for a half day (one presentation). Travel and accommodation is typically £140. Online talks are £325.
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