Methods for fabricating sub-lithographic, nanoscale microchannels utilizing an aqueous emulsion of an amphiphilic agent and a water-soluble, hydrogel-forming polymer, and films and devices formed from these methods are provided. If the mobile device is a new device to the area, the contact information of the mobile device is passed to a reverse 911 database in order for a user of the mobile device to receive local alert messages transmitted by a reverse 911 system. Advantageously, the self-organizing techniques can be used without a special starting point for the thresholds. Preferably, the upper drive retention portion is positioned further forward relative to the lower belt retention portion such that the upper portion is moved more forward relative to an axis of rotation of the pulley. The present apparatus can qualitatively and quantitatively monitor a content of a specific component of a tested solution. The invention utilizes a method of case-base-reasoning for the task of sensor value prediction.