Abstract: A pipeline breakage sensing system includes a plurality of pressure sensors installed on pipelines to measure pressure of a fluid. Each of these pressure sensors presumes a breakage location in cooperation with other neighboring sensors on the basis of a pressure change of the fluid and transmits information relating to the presumed breakage location. The pipeline breakage sensing system further includes a pressure sensor for detecting the occurrence of a seismic earthquake event, in addition to a managing center for sensing a breakage location on the basis of information transmitted from respective pressure sensors and by calculating a time correlated comparison between the superimposed pressure readings from neighboring pressure sensors used to detect the occurrence of such a fluid pressure change.

Abstract: A resonant L-C circuit is series-excited from an AC voltage source and intended to be parallel-loaded with a load that, for some reason or another, may be disconnected or otherwise inoperative. For efficiency reasons, the unloaded circuit Q-factor may be about 50 times higher than the loaded Q-factor; which implies that, if the load were to become inoperative, the power drawn by the L-C circuit from the source, and the voltage/current magnitudes developed in the L-C circuit, would be 50 times larger than when the load is operative. To prevent unnecessary power drain and/or to avoid damage to source and/or circuit components, which damage may occur even if the L-C circuit is left unloaded for but a very brief period, a circuit protector is provided.

Abstract: A system and method for treating publisher's textual and graphical data and converting it to device independent digital form for retention in master memory. Once both textual and graphical data have been converted to digital form, the graphical data are inserted in appropriate locations as determined by a formatting routine. Formatted articles then are collected for retention in master memory, and eventual production of local memory. The formatted page files residing in master memory are in a device independent form such that they are outputtable with high quality on a variety of output devices. Additionally, an index is generated for every word retained in master memory enabling the user to peruse as many as 30,000 complex pages for the desired subject matter.