This disclosure provides compositions containing solid forms of tazobactam arginine, and methods of manufacturing and using these compositions. A domain-independent sentiment lexicon is established and a classifier uses the lexicon to score sentiment of domain-specific documents. The assembled heater core is placed into an adapted enclosure, and heated, for example, by induction or laser heating, to a temperature above the melting temperature of the brazing material to mechanically fix the ends of the pipes to the holes. The steering controller determines a steering calibration appropriate for the load represented by the feedback signal.