Abstract: A therapeutic agent may be dispensed into a biological fluid on an as needed basis. A microelectromechanical system valve may dispense the therapeutic agent as needed. The valve may sense the extent of the need for the therapeutic agent and may controllably open to provide that therapeutic agent in response thereto.

Abstract: A microchannel cooling system used to cool integrated circuits may include a number of microchannels which may be subject to bubble blockage. When bubble formation or nucleation occurs due to heating, the bubbles may become trapped within the microchannels. A valve within the microchannel may automatically operate, at least partially, to close off the microchannel, allowing the bubble to be freed and to be flushed from the channel in some embodiments.

Abstract: A system communicates video information including television content associated with a plurality of channels and ancillary information. Information may be transmitted with the ancillary information that is indicative of the type of content included in the ancillary information. This provides the user, in one embodiment of the present invention, with a visual indication of the type of information that accompanies television content. This helps the user to decide whether the user wishes to view the ancillary information and provides the opportunity to select that enhancement for viewing.