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IEE Review

Issue 4 • Date 19 Apr 1990

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Displaying Results 1 - 4 of 4
  • Line management-positive train identification

    Page(s): 155 - 158
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (292 KB)  

    The Northern Line of the London Underground boasts one of the world's longest railway tunnels, upwards of 50 stations, 170 train units and typically carries over 700000 passenger-journeys per day. A major disruption in the service-a suspected fire, or a passenger falling ill-can bring the line to a halt for up to an hour, and it can take many hours thereafter to restore normal timetables. Comprehensive information to the line controllers is vital in recovering from these small disruptions and allows a more efficient use of trains and crews. Here, the authors describe positive train identification (PTI), a method of obtaining, in real time, information about the train, its crew and its destination from the most reliable source: the train driver. If there is then a discrepancy with the timetable-based arrangement held in the memory of the signal control equipment, it can be resolved before any diverging junction View full abstract»

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  • Revolutionary energy-a wind/diesel generator with flywheel storage

    Page(s): 149 - 151
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (232 KB)  

    The author describes how, this year, the Aegean island of Agios Efstratios will begin installing a field demonstration of a combined wind-turbine/diesel generating system. The author outlines this generating system and shows how the problem of energy storage requirements (to cover short-term fluctuations in wind speed) has been overcome by the adoption of a flywheel system View full abstract»

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  • Setting the standards-the European EMC Directive

    Page(s): 143 - 146
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    It is a peculiarity of electrical and electromagnetic equipment that it is capable of interfering with the operation of other such equipment at a distance. This mysterious property of electromagnetic radiation, which underlies radio and all its related technologies, needs to be carefully controlled if radio, telecommunications, electrical and electronic equipment is to coexist safely. Such control can only be imposed by the state, and with the impending single European market is is obviously desirable that all states in the European Community should aim for the same standards. The author describes how, to this end, the member states have agreed on a directive covering electromagnetic compatibility of equipment which is to be known as the EMC Directive 89/336/EEC View full abstract»

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  • FDDI and beyond-a network for the 1990s

    Page(s): 131 - 134
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (232 KB)  

    The availability of cheap optical fibre and associated transceivers has encouraged the development of the next generation of computer networks. Most prominent among these is the fibre distributed-date interface (FDDI), which is expected to become a standard. The authors describe the principal advantages of the FDDI (namely its size and transmission rate) and outline the apparently bright future of FDDI networks and their applications View full abstract»

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