You can't focus on studying if you're chatting with someone else, too. So the cell phone is off limits. Turn off the home phone, too, along with the computer (unless you're prepping on it) and any music with vocals. Study music should be lyric-free! Post a sign on your door for people to stay away.
cuirass (plural cuirasses) 1  A piece of defensive armor, covering the body from the neck to the girdle. 2  The breastplate taken by itself.
The lamellar cuirass was especially popular with the Rus, as well as Mongols, Turks, Avars, and other steppe peoples, as it was simple to create and maintain. Lamellar is pictured in many historical sources on Byzantine warriors, especially heavy cavalry.