Volume 27 Issue 3 • March 1990

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Displaying Results 1 - 5 of 5
  • Thevenin's theorem

    Publication Year: 1990
    Cited by:  Papers (14)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (109 KB)

    The equivalent generator theorem is discussed. It is commonly called Thevenin's theorem, in honor of Leon Charles Thevenin, a French telegraph engineer and educator who proposed it in 1883, but in fact Hermann von Helmholtz proposed it first, in an 1853 paper. Although originally introduced to facilitate the analysis of linear networks of resistances and voltage sources, the theorem subsequently w... View full abstract»

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  • Bracing for the geomagnetic storms

    Publication Year: 1990, Page(s):27 - 33
    Cited by:  Papers (46)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (782 KB)

    As solar activity moves toward an 11 year peak, utility engineers are girding for the effects of massive magnetic disturbances. The nature of the geomagnetic disturbances is examined. The way in which geomagnetically induced current (GIC) affects power systems is explained. Virtually all power equipment, operation, and protection problems due to GIC are traceable to two direct effects: the half-cy... View full abstract»

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  • Multichip modules: next-generation packages

    Publication Year: 1990, Page(s):34 - 36
    Cited by:  Papers (41)  |  Patents (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (574 KB)

    Multichip modules (MCMs), which interconnect multiple bare dice by means of a stack of conductive and dielectric thin films, are discussed. Among their advantages are reduced delays between chips, simplified power distribution, and enhanced dissipation capabilities. Key design demands that should be weighed by IC design engineers planning to use MCMs are examined. They concern transmission delays,... View full abstract»

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  • Computer-aided fighter pilots

    Publication Year: 1990, Page(s):38 - 41
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    It is shown how an interdisciplinary team overcame technical and organizational hurdles to develop an expert system that tailors its real-time responses to a pilot's flying style. The system, called the Pilot's Associate (PA), besides the pilot's inputs, required in its knowledge bases expertise from human-factors specialists to decide how the information should be displayed, from psychologists to... View full abstract»

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  • Reconciling conflicting design-automation standards

    Publication Year: 1990, Page(s):44 - 45
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (217 KB)

    There are four incompatible sets of guidelines for describing and communicating data for products ranging from components to systems. Representatives from the bodies governing the various standards have been trying to decide how to make the standards work together, a process they call harmonization. The standards involved are the Electronic Design Interchange Format (EDIF), the Initial Graphics Ex... View full abstract»

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