Abstract: A method and apparatus for extending the range and effectiveness of scents is disclosed. The apparatus includes a container which contains a scented substance and a controllable heat source which is used to heat the scented substance to a vaporized state. A controllable air supply is then used to blow the vaporized scent into the environment. The apparatus is controlled by an electronic control unit.

Abstract: A demand assignment process for a packet switching communications system in which a terminal requests capacity from a scheduler for the transmission of bursts of packets, and in which the scheduler determines whether the burst is complete by identifying gaps in the traffic stream and preferentially allocates capacity to those terminals currently in the middle of transmitting a burst, allowing transmission of further packets of the burst.

Abstract: A demand assignment process for a packet switching communications system in which a terminal requests capacity from a scheduler for the transmission of bursts of packets, and in which the terminal transmits position signals to the scheduler with at least some of the packets indicative of those packets' position in a burst The position signals are used by the scheduler to determine the length of the burst and preferentially allocate capacity to those terminals currently in the middle of transmitting a burst, allowing transmission of further packets of the burst.