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.
With the busy lives we lead, just the thought of volunteering might seem overwhelming, but in reality it could be very beneficial. It's easy to think about the positive impact that volunteers have on others, but we don't often consider how rewarding it can be for a volunteer to reach out and make a difference in someone's life.