Abstract: Method for enhancing the performance of a medical search engine, including the procedures of generating an inverted index of medical related documents, receiving a medical search query from a user, expanding and augmenting the received medical search query thereby generating an enhanced medical search query, retrieving all the medical related documents in the inverted index which are relevant to the enhanced medical search query, ranking the retrieved medical related documents according to a master expression, presenting the ranked retrieved medical related documents to the user, receiving at least one user feedback response from the user to a respective one of the ranked retrieved medical related documents, for each received user feedback response evaluating and storing at least one feature of the respective one of the ranked retrieved medical related documents and modifying the master expression based on the received user feedback response using at least one machine learning algorithm.

Abstract: Apparatus for interactive broadcasting comprises: an in step device for determining predetermined times in a broadcast relevant to user interaction; a content insertion device for inserting interactivity content for sending over a network to users for interaction at the predetermined times; and an embedding unit for embedding timing control into the interactive content to ensure that the interactive content is displayed to the users at the predetermined times. The apparatus is useful for providing timely user interaction even via the cellular network. Further refinements include traffic spreading at the application layer, and the use of SMS to provide a user with the URL for initial logging on.