A chimeric transactivator comprises a transcription activation domain, a repressor protein DNA binding domain and the bacterial DNA gyrase B subunit. The methods and systems include one or more enhanced power saving modes. When a gateway, connecting a first communication network and a second communication network, operates in a beacon mode, the gateway determines whether the first communication network is in an allowed period or a forbidden period, and generates a determination result. Each level stores pairs of a key value and a pointer value. Each plate has a plurality of orifices and a plurality of micropockets configured to trap exhaust particulates.