A method is described for segmenting a data stream comprising variable-size packets, a data stream being defined by its source node, sink node, assigned network route, and other attributes. Detection of various types of devices and equipment in a localized area is by way of short-range wireless signals over which data about the devices is transmitted to one or more subscriber units. The exhaust gas stream may be supplied to an exhaust passage and cooled to a predetermined temperature range, and at least a portion of the NOx within the exhaust gas stream may be converted into ammonia. In some embodiments, the screen structure includes a plurality of screen members adhesively mounted together during assembly. The guide parts interact with guide rails which are provide in a cassette which accommodates the storage film or on a film-clamping slide of a reader. The hair care compositions optionally further comprise a non-volatile silicone with a molecular weight greater than about 40,000 daltons.