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Vacuum Tubes
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DEFINITION: Also see cathode ray tube ( CRT), the specialized kind of vacuum tube that is in most desktop display monitors. A vacuum tube (also called an electron tube or, inthe UK, a valve) is a device sometimes used to amplify electronic signals. In most applications, the vacuum tube is obsolete, having been replaced decades ago by thebipolar transistor and, more
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Implementing the Lustre File System with Sun Storage: High Performance Storage for High Performance Computing
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WHITE PAPER:
This paper describes an implementation of the Sun Lustre™ file system as a scalable storage cluster using Sun Fire™ servers, high speed/low latency InfiniBand interconnects, and additional networking and storage devices.
Posted: 12 Dec 2008 | Published: 12 Dec 2008
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The MATH, MYTH, & MAGIC: An Introduction to Identity Data Search-and-Match
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BOOK:
This book is of value to both the person who is tackling a "name search" and "name matching" problem for the first time, as well as to the experienced specialist in "identification and search" systems.
Posted: 08 Dec 2008 | Published: 08 Dec 2008
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VACUUM TUBES DEFINITION (continued): … recently, by the field-effect transistor. However, tubesare still used in some high-power amplifiers, especially at microwave radio frequencies and in some hi-fiaudio systems. Tubes operate at higher voltages than transistors. A typical transistorized amplifier needs 6 to 12 volts to function; an equivalent tube type amplifier needs 200 to 400 volts. At the highestpower levels, some tube circuits have power supplies delivering several kilovolts. Vacuum tubes are making a comeback among audiophiles who insist that tubes deliver …
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