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Volume 25 Issue 6 • June 1988

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Displaying Results 1 - 5 of 5
  • Pinning defense hopes on Aegis

    Publication Year: 1988, Page(s):24 - 27
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The author discusses Aegis, the US Navy's advanced shipborne system for threat and battle management, which uses sophisticated beam-forming and signal-processing techniques to reduce the vulnerability of a massive, floating phased-array radar. He describes the operation of the radar system, SPY 1-A, which is at the heart of Aegis and features low-side-lobe design. He examines Aegis' effectiveness ... View full abstract»

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  • Switched-capacitor filters: precise, compact, inexpensive

    Publication Year: 1988, Page(s):28 - 32
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (693 KB)

    Switched-capacitor filters-silicon ICs that combine features of analog and digital filters-are penetrating markets far beyond the telephone networks for which they were first developed. They are now found in audio equipment, speech analyzers and recognizers, test instruments, and electronic musical instruments. Their precision, compactness, and low cost make them preferable to discrete and hybrid ... View full abstract»

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  • Quantum-tailored solid-state devices

    Publication Year: 1988, Page(s):33 - 37
    Cited by:  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (711 KB)

    Techniques that allow semiconductor crystals to be grown on one layer at a time are described, and the potential they offer for tailoring device characteristics precisely by controlling the band gap is discussed. Three tools used to accomplish this are examined: alloying, which changes a semiconductor's chemical composition; the juxtaposition of heterogeneous materials to form heterojunctions; and... View full abstract»

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  • Telephone wiring: a conduit for networking standards

    Publication Year: 1988, Page(s):38 - 41
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (418 KB)

    The author discusses emerging standards for local area networks (LANs) on unshielded copper wires that are expected to make it cheaper and easier for computers to communicate in offices, factories, and laboratories. He describes two twisted-pair standards developed by the IEEE 802.3 working group, one, already approved, designed for data transmission at 1 Mb/s, the other at 10 Mb/s. The official d... View full abstract»

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  • Garbage in, power out

    Publication Year: 1988, Page(s):42 - 44
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (370 KB)

    The growing use of waste-to-energy conversion as a solution to the US national refuse crisis is discussed. The two main technologies for burning waste, refuse-derived fuel and mass burn of unsorted garbage, are described. The environmental impact of these plants is examined.<<ETX>> View full abstract»

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