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.
Scientists at Tufts University in Boston found that a diet rich in walnuts may improve mental performance. A synergy between the specific type of antioxidants and omega-3 fatty acids in this nut might be at work here to boost brain power. See four other nuts that made our list of the five healthiest nuts for women.