In a secure computing environment, a method, system and device are provided for loading stored encryption key data from a protected non-volatile memory of a portable device. For example, a device includes a first NAND gate with an input for receiving a serial mode enable signal. As a foodstuff having a foreign ferromagnetic or electrically conductive object therein passes through the receiver coils, a voltage is induced in them. This compositional grading mitigates the barrier between the respective bandgaps. A closing system can be coupled to each refrigerated compartment constituting the refrigerating cabinet, to close, in reversible, access to the products contained within the compartment and to minimise its thermal dispersion to the environment. Systems and methods of acquiring image data of an object may comprise: selectively inducing photoactivation of material at a site on the object; performing an optical axis integration scan; simultaneously executing a time delay integration scan sequence; and processing acquired image data in accordance with one or more desired analyses.