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) Lower Cholesterol Levels: Walnuts are one of the richest food sources of of alpha-linolenic acid (ALA), an essential omega-3 fatty acid, which may help lower cholesterol levels. Researchers have compared the effects of walnut and fatty fish consumption on the risk of developing coronary heart disease.