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IEE Review

Issue 10 • Date 17 Nov 1988

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Displaying Results 1 - 4 of 4
  • The silicon PCB

    Publication Year: 1988, Page(s):411 - 413
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB)

    In its simplest form, a silicon hybrid is essentially a miniaturised PCB built on a silicon wafer, and like any other PCB it is made up of layers of metal tracks separated by a suitable dielectric. However, unlike a conventional PCB, a silicon hybrid is manufactured using IC fabrication techniques. The author discusses the Research Initiative in Silicon Hybrids (RISH). Developing silicon hybrids a... View full abstract»

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  • The quest for the quantum dot

    Publication Year: 1988, Page(s):395 - 397
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    Semiconductor devices that confine electrons within two-dimensional quantum wells are already in production. The zero-dimensional quantum dot promises super-efficient lasers with the last word in spectral purity. The author briefly discusses the definition of the electron and then goes on to discuss in more detail the quantum well obtained in the case of a GaAlAs-GaAs heterojunction. Further quant... View full abstract»

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  • AC traction in Finland

    Publication Year: 1988, Page(s):381 - 383
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    Both British Rail and London Underground are looking at the potential of AC inverter-driven induction-motor drives for railway traction, as part of their modernisation programmes. Such systems have been used in Finland for many years, and Helsinki Metro is the only metro outside Japan to use only AC drives. The authors discusses the power apparatus of the Helsinki Metro. This includes 125 kW conti... View full abstract»

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  • Talking to machines

    Publication Year: 1988, Page(s):385, 387 - 388
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    Research has been in progress now for over 40 years to develop machines that will recognise natural speech. The author discusses the problems of speech coding, recognition and synthesis. Research aimed at improving the analysis of the original speech and subsequent synthesis, and progress to date are discussed. The use of intelligent conversational dialogue and future developments are also discuss... View full abstract»

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