The present invention is a composite material and process to produce same. The pressure changes that may be monitored may include, e. Such device can be used as a label-free, biocompatible, bioresorbable, implantable device for various applications ranging from medical imagingdiagnostics, drugtherapeutic delivery, to food chain safety and environmental monitoring. Preferably, the paint shield includes radiused corners for the left and right hand outside corner shields for accommodating the slight radius typically found on sheet rock, plaster, etc. On the basis of the received location information, the server retrieves one or more corresponding landmark names along a high-accuracy retrieval program.