Abstract: A method for conducting a retail transaction comprises: monitoring weight measurement data corresponding to a shelf and a plurality of non-homogeneous products arranged thereupon, said weight measurement data measured by the plurality of weighing assemblies and transmitted therefrom as respective streams of weight measurement data-points comprising at least one of weights and voltage inputs thereto; responsively to a change over time in the values of said weight measurement data-points and contingent upon said values reaching respective steady states according to a stability-tracking rule, determining a set of weight-event parameters of a weight event, the determined set of weight-event parameters comprising one or more products and a product-action respective of each one of the one or more products; and performing at least one of: recording information about the results of the determining in a non-transient, computer-readable medium, and displaying information about the results of the determining on a displa

Abstract: In a method for identifying an explosive in a sample, an explosive fingerprint defined by a set of kinetic parameters is received. The kinetic parameters describe a plurality of interactions between the explosive and each of a respective plurality of functional moieties. A data processor is used for accessing a database of explosive fingerprints, and searching the database for a database fingerprint matching the received fingerprint.

Abstract: A method and a system for identifying an explosive in a sample are disclosed. The method comprises receiving an explosive fingerprint defined by a set of kinetic parameters, describing a plurality of interactions between the explosive and each of a respective plurality of functional moieties. The method further comprises using a data processor for accessing a database of explosive fingerprints, and searching the database for a database fingerprint matching the received fingerprint. The system comprises a plurality of sensing devices, each comprising semiconductor nanostructures (e.g. Si nanowires) having attached thereto a functional moiety selected to interact with a nitro-containing and/or peroxide-containing explosive sample.