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.
Walnut oil is edible oil pressed from the Persian walnuts or English walnuts (Juglans regia). The smoking point of walnut oil is 204 Â°C (400 Â°F). This oil is a great source of Omega-3 fatty acids. It has high content of phytonutrients and a source of phosphorus, selenium, zinc, magnesium, calcium and iron.