Simulation vs. real beetle invasions (IMAGE) Tokyo Metropolitan University Caption The cellular automata model is based on rules showing how likely it is for beetles to spread in different directions from each “cell.” The simulated occurrences broadly agree with actual occurrences in the north of Saitama Prefecture. Credit Tokyo Metropolitan University Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.