While Mirlyn (the library catalog) is useful for finding books and journals, it will not tell you what articles are inside a journal. In order to find articles, you need to use a database that indexes articles in journals.
You can browse a list of databases by subject area by using the browse function at the library web page. Using the drop-down menu, select the area that most closely matches your area of research. Women's Studies, for example, is classified as a social science, whereas U.S. History is classified under Humanties. Once you select your area of research, click "go," and you will see a list of recommended databases in that subject area.
Note: JStor provides broad coverage of scholarly journals and full-text access; however, in many cases, the most recent 2-4 years of a journal are not covered.