Cascade and Sensors (IMAGE) Universidad Carlos III de Madrid Caption On Left is a cascade of the "viral" spread of hashtag #openwebawards. On Right is how sensors are chosen: using a set of randomly selected users (C) some followers are framed in the sensor-friends group (S). These occupy a more central position in the web and, therefore, find out about information and spread it before others. Credit UC3M Usage Restrictions None License Licensed 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.