Abstract: A device that includes a piezoelectric substrate is provided. The device may include a sensor layer disposed on the substrate and operable to interact with, or react with, a target species; a first and a second electrode, that are spaced from each other and in communication with the substrate; a first detector operable to detect the interaction or the reaction of the sensor layer with the target species based on a change in an optical characteristic of electromagnetic radiation propagated through the substrate; and a second detector operable to acoustically detect the interaction or the reaction of the sensor layer with the target species. Associated methods are provided.

Abstract: A comprehensive method and system is provided for managing bulk and non-bulk material and assets using radio frequency and other asset identification devices, distributed mobile computing systems, centralized data storage environments, and client-server based computing. In particular, a process has been designed and to manage shipment items from businesses and third parties to customer designated locations. Components of this system include electronic asset identification devices, a central data repository, a mobile computing environment and associated software applications supporting a client-server system or n-tiered computer system. The mobile computing environment includes software which enables users to physically locate assets, view asset information, and modify such information to reflect current asset status. This information may then be exchanged and synchronized across the n-tiered computer system.