Abstract: A system for reheating a power generation system including a boiler having a waterwall and a steam drum with an input fluidly coupled to the waterwall and an auxiliary heat source to provide heated fluid. The system also includes a first flow control valve connected to the auxiliary heat source and the boiler to control a flow of heated fluid from the auxiliary heat source to the waterwall; a first isolation valve disposed at a waterwall, to isolate circulation of heated fluid from the steam drum to the waterwall; and a sensor to monitor at least one operating characteristic in the boiler. The system also includes a controller to control at least one of the flow control valve, the isolation valve, and the auxiliary heat source to control the amount of heated fluid supplied to the waterwall when the boiler is not generating steam.

Abstract: A system for reheating a power generation system including a boiler having a waterwall and a steam drum with an input fluidly coupled to the waterwall and an auxiliary heat source to provide heated fluid. The system also includes a first flow control valve connected to the auxiliary heat source and the boiler to control a flow of heated fluid from the auxiliary heat source to the waterwall; a first isolation valve disposed at a waterwall, to isolate circulation of heated fluid from the steam drum to the waterwall; and a sensor to monitor at least one operating characteristic in the boiler. The system also includes a controller to control at least one of the flow control valve, the isolation valve, and the auxiliary heat source to control the amount of heated fluid supplied to the waterwall when the boiler is not generating steam.

Abstract: A method and apparatus for per connection queuing of multicast transmissions. The method begins by receiving a cell associated with a multicast transmission. A multicast transmission typically includes a single ingress connection and a plurality of egress connections. The processing then continues by queuing the cell in a next available cell buffer of a root queue that is associated with the multicast transmission. Next, a determination is made as to whether a predetermined number of leaf queues (i.e., queues associated with egress queue identifiers) associated with the multicast transmission are empty when the queuing of the cell commences. Each of a plurality of leaf queues is associated with a corresponding one of the egress connections of the multicast transmission. A leaf queue will be empty when the corresponding egress connection has transported all of the data cells contained within the root queue associated with the multicast transmission.

Abstract: A vaccine for the treatment or prophylaxis of C. difficile associated disease comprises a C. difficile gene or a C. difficile peptide/polypeptide or a derivative or fragment or mutant or variant thereof which is immunogenic in humans. The gene encodes a C. difficile surface layer protein, SlpA or variant or homologue thereof. The peptide/polypeptide is a C. difficile surface layer protein, SlpA or variant or homologue thereof. The vaccine may comprise a chimeric nucleic acid sequence.