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IEE Review

Issue 11 • Date 6 Dec. 1990

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Displaying Results 1 - 5 of 5
  • The age of the squirrel cage (motors)

    Publication Year: 1990, Page(s):435 - 438
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB)

    In 1989, British Rail placed an order for 100 four-car electric multiple-unit trains for use on the Network SouthEast Southern Region lines. The trains use an electric-traction drive system with squirrel-cage induction motors and 3-phase invertors, incorporating high-power GTO thyristors and microprocessor control.<> View full abstract»

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  • Engineering endeavour (spacecraft construction)

    Publication Year: 1990, Page(s):425 - 428
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (322 KB)

    One of the most challenging environments an engineer can design for is space. Reliability is vital as unmanned spacecraft are totally unattended and manned spacecraft put human lives at risk. Near Los Angeles Rockwell International builds both the space shuttle and the B1 bomber. The management team work hard in encouraging their workers to be reliable and to admit their mistakes.<> View full abstract»

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  • New frequencies for old-millimetric communications

    Publication Year: 1990, Page(s):421 - 424
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (335 KB)

    As the 1990s are entered, there is severe competition for the lower frequency regions of the electromagnetic spectrum with little, if any, spare capacity below 22 GHz. There is therefore pressure to move to ever higher frequencies. The Radiocommunications Division of the UK Department of Trade and Industry is leading Europe in an attempt to open use of the millimetric part of the spectrum for comm... View full abstract»

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  • Computers before silicon-design decisions on Edsac

    Publication Year: 1990, Page(s):429 - 431
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB)

    Edsac (Electronic Delay Storage Automatic Calculator) was designed in 1946 at Cambridge University. The author recalls design decisions on this, one of the earliest electronic computers. The decisions were on three levels: policy, architecture and implementation. The Edsac was a serial machine with an ultrasonic delay memory which used fixed point arithmetic. The clock frequency was 500 kHz to mak... View full abstract»

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  • Great expectations-the HI transputer

    Publication Year: 1990, Page(s):411 - 413
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (281 KB)

    The first of a new generation of transputers, codenamed the HI and due to be launched in 1991, promises an order of magnitude improvement for both processing power and communications. Four design goals have been achieved for the HI: an increase in performance; upward compatibility with the first generation TX-series transputers; enhanced support for operating systems in embedded applications; and ... View full abstract»

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