Abstract: A system for monitoring Internet usage, in accordance with the present invention, includes an Internet access unit for accessing the Internet, the Internet access unit including a browser for navigating on the Internet. A transmission device is included for transmitting browser activity and providing browser activity information to be transmitted to a monitoring unit. The monitoring unit is remotely disposed from the Internet access unit and coupled to the transmission device, the monitoring unit including a display for viewing and recording Internet activity of the Internet access unit.

Abstract: In accordance with the present invention, a detection device capable of being coupled to a person for remotely monitoring heart and respiratory functions includes a processor, a photo cell coupled to the processor for determining blood oxygen content of the person and a temperature sensor coupled to the processor for determining a temperature of the person. The processor compares the determined blood oxygen content and the temperature to desired values. A transmitter is included for transmitting a warning signal if one of the determined blood oxygen content and the temperature are other than the desired values.

Abstract: Digitally encoded presentations are provided at the request and convenience of receivers associated with a data distribution system. The problem of reliably satisfying large numbers of randomly occurring receiver demands for digitally encoded presentations, particularly from a single storage copy of the presentation, and particularly for linear presentations, is addressed. The invention may be embodied in a system which includes a repository of digitally encoded presentations, cache memory for holding presentations which are being supplied to receivers, and a multicasting network for connecting the system to receivers. By grouping receivers into receiving groups for receiving multicasts of presentation segments, the system can satisfy the requests of any number of individual receivers, irrespective of other receivers receiving the presentation.