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.
Volunteering can be far more than simply doing a good deed. In fact, volunteering can be a great way to develop skills, learn more about career options, make friends, garner new professional contacts, get exercise, spend time outdoors/with animals/with kids, or even just shake up your routine.