1 Associations. 2  Associations between actors and use cases are indicated in use case diagrams by solid lines. 3  An association exists whenever an actor is involved with an interaction described by a use case.
Benefits of Volunteering. Volunteering supports the Exploratorium and promotes hands-on science, artistic expression, and educational innovation. Volunteers contribute to the community while gaining additional experience and new skills. They get to know each other at gatherings and special events and by sharing their ideas and experiences via an e-mail list.
Here are fifteen proven benefits of volunteering. Maybe one of them will convince you to get off the couch and out the door to engage with your community. Community, Loneliness, and Bonding. Many journals and reports have studied the benefits to volunteering in recent years. They find that volunteering is one of the best things you can do for yourself and the world.