Word: flow
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Dates: during 1960-1969
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...gases of a jet engine, from air forced through nose vents in" missiles or airplanes, or even from a tank of compressed air. In a simple fluidic circuit, the power stream is fed into the base leg of a Ylike arrangement of tubes or channels. As the stream flows through the Y toward outlets at the end of two diverging arms, a fluid-flow phenomenon, called "the Coanda effect," causes the stream to attach itself to one side of the circuit and to flow out through only one of the arms...
...control jet" of air, blown perpendicular to the power stream as it passes through the base leg, can force the stream to attach itself to the opposite side of the circuit. When that happens, the power stream flows out entirely through the other arm of the Y. A puff of the other control jet reverses the process, just as a small voltage change on the grid of a vacuum tube can control a relatively heavy flow of current through the tube's plate circuit. Like a vacuum tube, the fluidic circuit can thus be used as a switch...
...assembly-line conveyor belt, moving parts momentarily interrupt strategically placed jets of air shooting across the belt. The interrupted air jets, connected to the control jets of a fluidic circuit, cause power streams to flow and stop, opening and closing valves. The valves in turn activate automated pneumatic machines that process the passing parts...
...work "that has already been done, many fluidics problems remain. Scientists still do not fully understand some fluid-flow phenomena; fluidic circuits are still relatively cumbersome and are generally more expensive than their electronic counterparts. In addition, the speed of fluidic devices is limited by the maximum velocity of a pressure wave through the fluid-which is the relatively slow speed of sound. This places them at a distinct disadvantage in competition with electronic computers, which are limited in speed only by their size and the velocity of an electrical impulse-the speed of light...
...Banco del Lavoro into a lame-duck administration and hobble its operations. "We can do absolutely nothing about planning even six months from now," complains one bank official. Even some politicians resent the dumping of Lolli, an expert on international monetary matters whose views on the gold flow have been sought by the U.S. Treasury and Congress. The sequence of events that led to the Longo-Lolli resignations, said an editorial in the left-of-center Republican Party newspaper La Voce Republicana last week, could be "an error whose consequences could be irreparable...