ScienceDirect Off-Campus Access Method: While you can access the ScienceDirect database by clicking directly on the website, you should go to the sciencedirect.com website, click on the link on the right, enter the "Sign in via organization" section, and then proceed by finding your institution name.
You can access the authentication page directed by entering the username of your institutional e-mail account (without @bogazici.edu.tr) and your e-mail password.