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.
Walnuts, one of the best nuts for arthritis, are rich in omega-3 fatty acids, a type of fat that helps reduce inflammation and can help lower the risk of developing arthritis. A quarter of a cup of walnuts contains 94.6 percent of the daily recommended intake of omega-3 fatty acids.