An injection-molded case and a manufacturing method thereof having antenna patterns are formed in the injection-molded case by only one insert injection molding process, without a second insert injection molding process as required in the conventional manufacture. The method also includes using the at least one descriptor to calculate intra-data-source signed matrices and generating a similarity matrix based on the intra-data-source signed matrices. Service and content providers are freed from having to develop custom formats for delivering content and data to the cable system. Thorough contaminant removal enables retrofitting air conditioning systems for use with newer, legally required refrigerants. The collaborative load balancing ensures grid reliability.