Green Open Access, sometimes called self archiving, is achieved by depositing a copy of an output, either the preprint or post print into an institutional or subject repository, usually after an embargo period. The output will be published via the traditional route via a subscription journal and then a copy will be uploaded to a repository. Book chapters can also be deposited into a repository although embargo periods may be longer than those applicable for journal articles. The route to achieve Green Open Access is completely free.
That said, most publishers have conditions about which version of a journal article (pre-print, post print or publisher's version) you are able to deposit in a repository. SHERPA/RoMEO can be used to check which version your publisher will allow to be deposited in an institutional repository. For book chapters, the publisher's website should have this information available. Alternatively, there is a community hosted spreadsheet which has been put together by information professionals from across the sector. This is available here.
If you want to upload an article to Derby's institutional repository (UDORA) please contact UDORA@derby.ac.uk and you will be registered with an account. You will also be given guidance on how to submit. For more information on how Derby is committed to Green Open Access and about UDORA, please see the UDORA tab.