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.
1. Black walnuts support healthy skin. It might seem a little strange to be rubbing the dried powder of a nut on your skin, but thatâs exactly what studies suggest you should do. Most of the skin-promoting benefits of the black walnut derive from its nutrient-rich hull (also known as husk), the outer covering of the nut.