Being aware of others activities plays a vital role in the success of online collaboration. As a result, many groupware systems nowadays provide information about collaboration activities in various forms. However, all of them tend to overburden the user with large amounts of unnecessary information. This happens because most of the time users are only interested in certain pieces of information for limited duration, while presently there exist no efficient mechanism for automatically following a users focus and adjusting the information flow directed at him. In this book the author presents...