You can access ScienceDirect through the A-Z Databases list on the HS/HSL website: https://www2.hshsl.umaryland.edu/hshsl/resources/databases/index.cfm.  Please note that the library does not have full-text subscriptions for all of the journals indexed by ScienceDirect.

If you access the database from offsite, you will need to log in with your myUM username and password.