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.
Beyond being good for the Red Cross, volunteering offers a surprising array of health, community, social and even career benefits to the individual volunteers. 1  By volunteering for the Red Cross, you will be connected with a worldwide community of like-minded people focused on helping others in need.eyond being good for the Red Cross, volunteering offers a surprising array of health, community, social and even career benefits to the individual volunteers. 1  By volunteering for the Red Cross, you will be connected with a worldwide community of like-minded people focused on helping others in need.