A health monitoring system for communication between at least one terminal device that moves with a person whose health is monitored and a first center device. In one implementation, the delineator is operable between a stowed configuration and a deployed configuration. Process for preparing these modified polymers. A three dimensional size for the object is determined. Sequencing means suitable for operating the control of the or each actuator in order to bring the seat into several different predetermined configurations in succession in accordance with a predetermined sequence of configurations with a predetermined hold time between each change of configuration. This optical disc apparatus is provided with a memory 17a for holding a second transfer function different from the first transfer function, and executes the focus servo according to the first transfer function when the seek control is not performed or executes the focus servo according to the second transfer function when the seek control is performed.