1 An actor is a person, organization, or external system that plays a role in one or more interactions with your system. 2  Actors are drawn as stick figures. 3  Associations. 4  Associations between actors and use cases are indicated in use case diagrams by solid lines.
Beauty benefits of walnut oil (Thinkstock photos/Getty Images) High in vitamins and proteins, walnut oil works wonders for your skin. Apart from eating walnuts, the use of it in the form of oil also helps your skin. They are known to be rich in fibre, Omega-3, protein and other vital minerals. Fights wrinkles.
Choosing 1/4 cup of walnuts for a snack can give you nearly 95 percent of your daily omega-3 requirements. These brain-friendly nuts are also full of B vitamins, which are particularly great for your skin. B vitamins help with stress management and mood, and and prevent skin disorders, says Mancuso.