If you are outside of the UVa system and do not have a Netbadge account, you will need to contact SHANTI to set up a Mediabase account.
If you have a Netbadge account:
Go to http://mediabase.drupal-dev.shanti.virginia.edu/
Click on the Menu icon
A drop-down menu will unfold
Click on Log In
Enter Your Netbadge information
Your account will be automatically created