An aqueous detergent composition, which is in the form of a thickened, mobile fluid, comprising foaming detergent and a polymer or polymer mixture which is capable of forming a reversible gel, which polymer or mixture is present in the composition as a multiplicity of individual gel particles. A noise level measuring circuit measures the existing level of cross-talk noise on the subscriber line. The backboard comprises a flexible or rigid backer, with each providing different game play dynamics. The activity monitoring strategy can use client-side executable functionality to implement the collecting of layout data and event data. The control valve is preferably an electro-pneumatic valve configured to actuate the firing valve in response to a trigger pull of a paintball gun. Further, the personalized search apparatus includes a search engine for searching for a file relevant to an input query using an information search engine installed in the user terminal to generate search results; and a personalized search engine for re-ranking the search results generated by the search engine based on the user favorites analysis model to generate personalized search results.