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 do not only provide healthy fatty acids, they are also rich in vitamins and minerals that help us to stay healthy. Health benefits. The list of nutrients provided by walnuts is long. It includes potassium, magnesium, phosphorus, iron, calcium, zinc, copper, vitamin B9, B6, E, A... Walnuts also contribute substantial amounts of dietary fiber which makes them useful in case of constipation.