Abstract: A segmented computer network topology has a plurality of network hosts, which are coupled in a ring. A method of resetting the segmented computer network topology includes initiating a reset sequence having a flushing phase, a subsequent scrubber selection phase, a next subsequent slot identification phase and a next subsequent ring start-up phase. Selected packets received by the network hosts are flushed from the ring during the flushing phase. A single one of the network hosts is selected as a scrubber host during the scrubber selection phase. A unique slot identifier is assigned to each of the network hosts during the slot identification phase. A ring start-up packet is sent from the scrubber host to each of the other network hosts over the ring during the ring start-up phase.

Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a first signal and a second signal in response to (i) a select signal, (ii) a first difference signal and (iii) a second difference signal. The second circuit may be configured to present a modulated output signal in response to the first signal, the second signal and a control signal. The first circuit may alternately operate on one of either (i) the first difference signal or (ii) the second difference signal. In one example, the present invention may be implemented as a SECAM video encoder.

Abstract: Weighted collagen microsponges having a highly crosslinked collagen matrix are described suitable for use in culturing organisms in motive reactor systems. The microsponges have an open to the surface pore structure, and pore sizes and volumes suitable for immobilizing a variety of bioactive materials. The microsponges also have an average particle size in the range of about 100 to about 1000 microns and a specific gravity above about 1.05.

Abstract: A fluidized bed reactor and reaction process, particularly well-suited for culturing cells, for example, for tissue culture and fermentation processes, are described which involve the treatment of at least a portion of the fluid exiting the fluidized bed reactor in a side loop in a manner to alter its temperature or composition, e.g., oxygenation, with recirculation of this treated fluid to the reactor as a portion of the fluid causing bed fluidization.

Abstract: Weighted collagen microsponges having a highly crosslinked collagen matrix are described suitable for use in culturing organisms in motive reactor systems. The microsponges have an open to the surface pore structure, and pore sizes and volumes suitable for immobilizing a variety of bioactive materials. The microsponges also have an average particle size in the range of about 100 to about 1000 microns and a specific gravity above about 1.05.

Abstract: Weighted collagen microsponges having a highly crosslinked collagen matrix are described suitable for use in culturing organisms in motive reactor systems. The microsponges have an open to the surface pore structure, and pore sizes and volumes suitable for immobilizing a variety of bioactive materials. The microsponges also have an average particle size in the range of about 100 to about 1000 microns and a specific gravity above about 1.05.