The battery terminals are represented as electron-source and electron-sink in the user interface of the models. The function of this variable is to stop the model once a certain number of electrons reach the battery positive, and a monitor displays the time taken to fill the electron-sink.
Australia faced the threat of communism after WWII ended in 1945. The threat was known as the Red Menace which was caused by all the conflicts in Asia and also things that were going on in Australia at the time. The Australian government responded to the Red Menace in many ways.
Four American presidents predicted that Vietnam's fall to communism would lead to the communization of all of Southeast Asia. Such presidential predictions proved to be false, as only a few countries in Southeast Asia became Communist.