You can quickly view these using the first links below. To use them interactively - allowing you to edit and run the code - there are two options. The easiest option is to click on the “Launch Binder” link, which will open up an interactive version in the browser without having to install Brian locally. This uses the mybinder.org service. Occasionally, this service will be down or running slowly. The other option is to download the notebook file and run it locally, which requires you to have Brian installed.
For more information about how to use Jupyter Notebooks, see the Jupyter Notebook documentation.