Using the library's main search, the same as you did for books in the box above, is also a great way to find articles. Once you've hit the "Search" button, you can find journal articles in the "Scholarly Articles" section by clicking on "See all results" beneath it, where as popular articles will be under "News & Magazine Articles."
Sometimes, it can also be helpful to use subject-specific databases. The subject librarians at Randall have created subject guides that list the best and most relevant databases for each subject. To find them, click on the "Databases" dropdown beneath the main search, then on "Choose a subject" under "By Subject:"