A method of transmitting a context identifier of header compression on a data packet connection in a telecommunications system, in which the context identifier can be transmitted either as part of a compressed data packet or in the header of a data packet to be transmitted at the convergence protocol layer of the telecommunications system. The present invention further includes a method of designing an object, prototype or a device using these sensors to detect both shear and normal forces encountered at the sensor locations. A light absorbing layer faces the back side and is positioned to prevent back light from illuminating the diffusely reflecting layer. Excellent winter hardiness to at least U. The second portion outside the housing is disposed to facilitate conducting the extracted heat into the ground.