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IEE Proceedings A - Physical Science, Measurement and Instrumentation, Management and Education - Reviews

Issue 1 • Date Jan. 1988

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Displaying Results 1 - 25 of 25
  • Higher education, industry and Government-new rules for a menage a trois

    Publication Year: 1988, Page(s):1 - 12
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1663 KB)

    Discusses the potential strengths and weaknesses of the couplings between industry, higher education and Government and identifies a number of guidelines which should be followed.<> View full abstract»

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  • Managing a business in the public sector

    Publication Year: 1988, Page(s):13 - 21
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1098 KB)

    Describes some of the challenges-opportunities, problems and changes-faced by the management of a public sector electricity Board. Managers in electricity supply operate in a complex organisation and within a framework of financial controls, constraints and social obligations imposed by Government and other statutory bodies. The paper considers how a distribution Board fits into the overall indust... View full abstract»

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  • New lightning flash counter and calibration circuit with improved discrimination of cloud and ground discharges

    Publication Year: 1988, Page(s):22 - 28
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (549 KB)

    A low-power lightning flash counter (LFC) utilising active elements (Micropower ICs) is presented. Better discrimination is achieved by using a narrow frequency band, centred around the 10 kHz according to the CIGRE specification. A simple circuit for producing double exponential pulses of variable rise times, accompanied by a modified in situ testing circuit which gives a more definite state of t... View full abstract»

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  • Electrical drive simulator for teaching purposes

    Publication Year: 1988, Page(s):29 - 32
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    The authors are concerned with the development of a microprocessor-based electrical-drive dynamic-response simulator. The rationale for introducing this form of teaching aid is explained and the necessary software development, to ensure a rapid simulation, discussed. A comprehensive example is given to illustrate the overall capability of the simulator.<> View full abstract»

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  • Design of a portable thermocouple calibrator

    Publication Year: 1988, Page(s):33 - 40
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1016 KB)

    Describes the design of a portable thermocouple calibrator and simulator. This microprocessor-based instrument is capable of calibrating and simulating the characteristics of seven commonly used thermocouples namely B, E, J, K, R, S and T types. Particular attention is focused on the design of the cold-junction compensation system, ease of operation through a 'soft-key' driven liquid-crystal displ... View full abstract»

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  • Ammeter induced perturbations of Argand diagrams for Debye-like dielectrics

    Publication Year: 1988, Page(s):41 - 50
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (973 KB)

    The role of the ammeter in dielectric measurements performed when this device is put in series with the studied sample, is investigated using Argand diagrams. Emphasis is placed on diagram distortions resulting from the ammeter influence, and, on misleading interpretations to which an experimenter can be led when completely neglecting this influence. This study is extended to cases where the ratio... View full abstract»

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  • How the electrical properties of soil affect the surge performance of buried long systems

    Publication Year: 1988, Page(s):51 - 55
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (483 KB)

    The proposed analysis deals with the study of the surge behaviour of buried long conductors, by taking into account the true frequency-dependent electrical properties of soil as a discharge medium of a transient current. As regards the water content, the worst case of soil practically devoid of moisture and, conversely, the case of water-saturated soil are both considered. When the conductor under... View full abstract»

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  • A photon-triggered spark gap

    Publication Year: 1988, Page(s):56 - 58
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (285 KB)

    The results are reported of an investigation into a spark gap triggered by photon action. A device with a remotely situated trigger gap, designed to avoid trigger erosion problems, has been developed and tested. Results are reported for a variety of gas fillings, at a single trigger energy and in nitrogen, at three different trigger energies. A model for the breakdown mechanism at the minimum trig... View full abstract»

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  • Effect of humidity and gas density on switching impulse breakdown of short airgaps

    Publication Year: 1988, Page(s):59 - 68
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (907 KB)

    The dual purpose of the present work was first to examine the effect of humidity and gas density on the breakdown characteristics of short airgaps and secondly to investigate whether charge injection data could provide additional information concerning the probability of breakdown at low probability levels. Impulse tests were, therefore, performed in a sealed test vessel using laboratory air for p... View full abstract»

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  • Arcs in boundary layer flow

    Publication Year: 1988, Page(s):69 - 75
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (638 KB)

    Measurements of the electric field generated in an arc, when it is driven by high-speed flow onto the edge of a plate whose surface lies parallel with the flow, are found to be in good agreement with previous theoretical calculations. Conventional and streak photographs confirm the boundary layer configuration assumed in the theory. The same theoretical and experimental approach has been extended ... View full abstract»

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  • Surface recombination of ions and cratering by ion impact

    Publication Year: 1988, Page(s):76 - 78
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (307 KB)

    A critical resume is given of the present state of knowledge about recombination of ions and electrons, mainly on a glass or quartz surface exposed to a low-pressure plasma, and of the cratering of the surface by the impacting positive ions. Suggestions are made for future work, and the existence of some scaling relations for the recombination coefficient noted.<> View full abstract»

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  • Statistical analysis of flashover data using a generalised likelihood method

    Publication Year: 1988, Page(s):79 - 87
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (598 KB)

    In order to ensure consistency in the treatment of flashover data, it is desirable that a standard method of analysis of test results be established. Previous workers have suggested that the maximum likelihood method would be appropriate for estimating the parameters of the breakdown probability distribution, such as V/sub 50/ and sigma in the normal distribution. The present paper shows how this ... View full abstract»

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  • President's inaugural address. Higher education, industry and Government ¿ new rules for a ménage á trois

    Publication Year: 1988
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2356 KB)

    First Page of the Article
    View full abstract»

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  • IEE Management & Design Division: Chairman's address. Managing a business in the public sector

    Publication Year: 1988, Page(s):13 - 21
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1426 KB)

    The paper describes some of the challenges ¿¿ opportunities, problems and changes ¿¿ faced by the management of a public sector electricity Board. Managers in electricity supply operate in a complex organisation and within a framework of financial controls, constraints and social obligations imposed by Government and other statutory bodies. The paper considers how a distribution Board fits into th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New lightning flash counter and calibration circuit with improved discrimination of cloud and ground discharges

    Publication Year: 1988, Page(s):22 - 28
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (681 KB)

    A new low-power lightning flash counter (LFC) utilising active elements (micropower ICs) is presented. Better discrimination is achieved by using a narrow frequency band, centred around the 10 kHz according to the CIGR¿¿ specification. A simple circuit for producing double exponential pulses of variable rise times, accompanied by a modified in situ testing circuit which gives a more definite state... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electrical drive simulator for teaching purposes

    Publication Year: 1988, Page(s):29 - 32
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (502 KB)

    The paper is concerned with the development of a microprocessor-based electrical-drive dynamic-response simulator. The rationale for introducing this form of teaching aid is explained and the necessary software development, to ensure a rapid simulation, is fully discussed. Finally, a comprehensive example is given to illustrate the overall capability of the simulator. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of a portable thermocouple calibrator

    Publication Year: 1988, Page(s):33 - 40
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1237 KB)

    The paper describes the design of a portable thermocouple calibrator and simulator. This microprocessor-based instrument is capable of calibrating and simulating the characteristics of seven commonly used thermocouples namely B, E, J, K, R, S and T types. Particular attention is focused on the design of the cold-junction compensation system, ease of operation through a `soft-key¿¿ driven liquid-cr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ammeter induced perturbations of Argand diagrams for Debye-like dielectrics

    Publication Year: 1988, Page(s):41 - 50
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1221 KB)

    The role of the ammeter in dielectric measurements performed when this device is put in series with the studied sample, is investigated using Argand diagrams. Emphasis is placed, on the one hand, on diagram distortions resulting from the ammeter influence, and, on the other hand, on misleading interpretations to which an experimenter can be led when completely neglecting this influence. Furthermor... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • How the electrical properties of soil affect the surge performance of buried long systems

    Publication Year: 1988, Page(s):51 - 55
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (603 KB)

    The proposed analysis deals with the study of the surge behaviour of buried long conductors, by taking into account the true frequency-dependent electrical properties of soil as a discharge medium of a transient current. As regards the water content, the worst case of soil practically devoid of moisture and, conversely, the case of water-saturated soil are both considered. Finally, when the conduc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A photon-triggered spark gap

    Publication Year: 1988, Page(s):56 - 58
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (375 KB)

    The results are reported of an investigation into a spark gap triggered by photon action. A device with a remotely situated trigger gap, designed to avoid trigger erosion problems, has been developed and tested. Results are reported for a variety of gas fillings, at a single trigger energy and in nitrogen, at three different trigger energies. A model for the breakdown mechanism at the minimum trig... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of humidity and gas density on switching impulse breakdown of short airgaps

    Publication Year: 1988, Page(s):59 - 68
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1152 KB)

    The dual purpose of the present work was first to examine the effect of humidity and gas density on the breakdown characteristics of short airgaps and secondly to investigate whether charge injection data could provide additional information concerning the probability of breakdown at low probability levels. Impulse tests were, therefore, performed in a sealed test vessel using laboratory air for p... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Arcs in boundary layer flow

    Publication Year: 1988, Page(s):69 - 75
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (819 KB)

    Measurements of the electric field generated in an arc, when it is driven by high-speed flow onto the edge of a plate whose surface lies parallel with the flow, are found to be in good agreement with previous theoretical calculations. Conventional and streak photographs confirm the boundary layer configuration assumed in the theory. The same theoretical and experimental approach has been extended ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface recombination of ions and cratering by ion impact

    Publication Year: 1988, Page(s):76 - 78
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (381 KB)

    A critical resum¿¿ is given of the present state of knowledge about recombination of ions and electrons, mainly on a glass or quartz surface exposed to a low-pressure plasma, and of the cratering of the surface by the impacting positive ions. Suggestions are made for future work, and the existence of some scaling relations for the recombination coefficient noted. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Statistical analysis of flashover data using a generalised likelihood method

    Publication Year: 1988, Page(s):79 - 87
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (945 KB)

    In order to ensure consistency in the treatment of flashover data, it is desirable that a standard method of analysis of test results be established. Previous workers have suggested that the maximum likelihood method would be appropriate for estimating the parameters of the breakdown probability distribution, such as V50 and ¿¿ in the normal distribution. The present paper shows how this method ma... View full abstract»

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  • The St. Andrews 1863 British Association ohm

    Publication Year: 1988
    IEEE is not the copyright holder of this material | PDF file iconPDF (185 KB)
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