You can find research papers on ArXiv.org. Insteresting sections for this course would be:
An easy way to get updated on what is new is to subscribe to the arXiv RSS feed of these sections. To get the rss feed for a specific section you just replace 'list' by 'rss' in the URL.
To get a 'feel' for a field that you don't know, you can subscribe to the corresponding arXiv section using Feedly where you can see what other people like and look at the most liked recent articles.