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

Issue 2 • Date March 1986

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Displaying Results 1 - 12 of 12
  • Effective 3-dimensional electric field calculation by surface charge simulation method

    Publication Year: 1986 , Page(s): 77 - 83
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (751 KB)  

    Details concerning fast and accurate electrostatic field calculation techniques based on the 3-dimensional surface charge simulation method by means of Fourier-type charges are presented. The techniques range over (a) the direct potential and field coefficient formulas, (b) a computation of Legendre function of the second kind with half integer degree¿¿toroidal function Qm¿¿¿¿(x), (c) a high-speed integral and (d) an introduction of the associated toroidal function Sm¿¿¿¿(x). As an example for application, a tilted hemispherically tipped cylindrical rod electrode with a spherical dielectric is analysed and the results are demonstrated. View full abstract»

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  • On the electrostatics of spherical protrusions

    Publication Year: 1986 , Page(s): 84 - 88
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (577 KB)  

    The electrostatic field associated with a conducting spherical protrusion on a smooth plane can be obtained by utilising a finite number of image charges, if the angle of intersection is restricted to a submultiple of ¿¿. The essential steps in obtaining the solution are presented, and general expressions for the system of image charges are derived. View full abstract»

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  • Book review: Sound and Structural Vibration, Radiation, Transmission and Response

    Publication Year: 1986
    Save to Project icon | PDF file iconPDF (124 KB)  
    Freely Available from IEEE
  • Stability characteristics of the Xi-core

    Publication Year: 1986 , Page(s): 89 - 93
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (548 KB)  

    The stability characteristics of the Xi-core at constant airgap is examined by experimental and theoretical methods. The 2-dimensional field is solved numerically using the finite difference technique. It is shown that the stability characteristics can be deduced from stored field energy variations. View full abstract»

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  • Microprocessor-controlled multichannel STAT analyser

    Publication Year: 1986 , Page(s): 94 - 98
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (415 KB)  

    The design of a multichannel discrete STAT analyser is described. The machine design incorporates a event-driven multitasking microprocessor with the capability of concurrent control of eight analytical modules. The microprocessor controller introduces flexibility and versatility to the system by replacing electro-mechanical and/or discrete logic components, and hence simplifies system modification and future expansion. As an added advantage, other machine functions, such as sequential control, signal acquisition and processing and data management, are performed by the microprocessor. View full abstract»

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  • Automatic determination of tone period and evaluation of dysphony in pathological voices

    Publication Year: 1986
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (643 KB)  

    The hoarseness of 28 subjects with laryngeal complaints of widely differing severity has been automatically evaluated by using the simple Chebychev norm to compare a 3-component vector representing the subject's voice with a normal template. A second procedure used the absolute values of the parameters without comparison with a standard. The three components of the characteristic vectors were extracted from recorded utterances of the Spanish vowel `a¿¿, for which it was necessary to determine the approximate tone period of the signals. Two methods of pitch extraction were used, one based on the autocorrelation function and the other on a SIFT algorithm. View full abstract»

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  • An electronic Doppler signal generator for assessing continuous-wave ultrasonic Doppler flowmeters

    Publication Year: 1986 , Page(s): 104 - 108
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (691 KB)  

    Flowmeters which utilise the Doppler principle at ultrasonic frequencies can be tested by means of a single-sideband generator which adds or subtracts the Doppler frequency and the ultrasound frequency. The design and performance of a generator is described. View full abstract»

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  • Spherical Harmonics and Tensors for Classical Field Theory

    Publication Year: 1986
    Save to Project icon | PDF file iconPDF (158 KB)  
    Freely Available from IEEE
  • Transducers in Measurement and Control

    Publication Year: 1986
    Save to Project icon | PDF file iconPDF (158 KB)  
    Freely Available from IEEE
  • Electromagnetic radiation: megahertz to gigahertz. A tribute to Heinrich Rudolf Hertz and John Turton Randall

    Publication Year: 1986 , Page(s): 109 - 118
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1908 KB)  

    The original background to the discovery of electromagnetic waves is described. It is shown that many of the extremely high-frequency techniques, which have been used in modern times, can be traced back to Heinrich Hertz himself. The influence which Hertz's work had on the invention of the cavity magnetron by Randall and Boot is described in somewhat more detail than has hitherto been published. View full abstract»

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  • The 1985 Lord Nelson of Stafford Lecture. Electricity in the UK

    Publication Year: 1986 , Page(s): 119 - 124
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1551 KB)  

    The paper describes the development of the electricity grid in the United Kingdom from its establishment in 1935. It originally allowed a pooling of the generating capability of many undertakings, and then led quickly to lower overall costs. After the second world war there was vast expansion of demand. In the 1950s and 1960s the 275 kV and 400 kV grids were built, and the present network, with relatively modest extensions and regular refurbishment, appears strong enough to serve beyond the turn of the century. View full abstract»

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  • Industrial electrical measuring instrument makers, 1890¿1960: reminiscent review

    Publication Year: 1986 , Page(s): 125 - 128
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (604 KB)  

    The author, who first joined the IEE 60 years ago, traces how the early craft of instrument making first met the needs of the new telegraph and power industries for control and portable test meters. Several firms were located in the Clerkenwell area, the home of clock and scientific instrument making: histories are briefly sketched of Elliott Brothers (from 1800), Nalder Bros. & Thompson, Evershed & Vignoles, Everett Edgcumbe (who, in 1910, built an aeroplane), Ferranti, and Record Electrical. The subsequent changes in the industry are outlined, as a transition from being instrument makers to instrument manufacturing. The contribution of the annual Conversazione and Exhibition of the Physical Society is mentioned, and the advent of electronics can be traced through the annual catalogues of this exhibition. View full abstract»

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