BrowZine makes accessing the library's journal subscriptions on your tablet device easy. You can add journals to your bookshelf and then get notified when a new issue is published. From that issue's table of contents, you can read and save a PDF of an article. You can also open that PDF in an app that allows annotating it, or you can save the article to a bibliographic manager like Zotero or Mendeley.
Configuration instructions for BrowZine.