Volume 25 Issue 7 • July 1988

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  • Automating software: proceed with caution

    Publication Year: 1988, Page(s):25 - 27
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Two kinds of computer-aided software engineering (CASE) tools are distinguished: front-end tools for planning and design (upper CASE), and back-end tools for implementation and support (lower CASE). The integration of these tools to cover more of the development cycle and improve the consistency of the results is discussed. The availability of CASE software and the effect of CASE on programmer pro... View full abstract»

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  • Phase digitizing sharpens timing measurements

    Publication Year: 1988, Page(s):28 - 32
    Cited by:  Papers (28)  |  Patents (9)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (497 KB)

    Oscilloscopes and other instruments that so precisely measure voltage are ill-suited to handling time-based communications signals, for their preoccupation with amplitude compromises timing accuracy, wastes memory, and complicates timing analysis. A measurement technique is presented, called phase digitizing, that remedies the situation by continuously counting a signal's zero-crossings and record... View full abstract»

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  • Aircraft jolts from lightning bolts (electronic systems protection)

    Publication Year: 1988, Page(s):34 - 38
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1531 KB)

    The trend toward the use of composite materials and digital electronics has renewed the need to quantify the effects of lightning strikes to airplanes, since composite structures do not provide shielding equivalent to that of metal aircraft, and digital systems are potentially more susceptible to upset by electrical transients than are analog electronic systems. A research program, called the Stor... View full abstract»

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