books.google.fr - The approach to human-robot social interaction taken in this thesis focuses on creating more accurate models of social tasks for planning. Because the human participants are modeled as a part of the environment, the world state in these problems is dynamic and partially observable. Human intention is...http://books.google.fr/books/about/Planning_for_Human_robot_Interaction_Rep.html?hl=fr&id=tSR6yP8QSLMC&q=aggregation+threshold&utm_source=gb-gplus-sharePlanning for Human-robot Interaction: Representing Time and Human Intention