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.
The fact that so many Western nations were members of SEATO demonstrates how important peace in Southeast Asia was to the West. the fact that communism was accepted by many of the nations involved. the level of fear that existed because of attacks by the Viet Minh.