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Electrical Engineers, Proceedings of the Institution of

Issue 1 • January 1972

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Displaying Results 1 - 19 of 19
  • Inaugural address. Computers and the professional engineer

    Publication Year: 1972
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (4359 KB)

    The rapidly increasing population in most parts of the world is making most countries more and more dependent on technological development. There is, therefore, a most urgent need to find means of making engineering systems more economical in the use of raw materials and natural resources, easier to control and operate, simpler and more reliable. This calls for ingenuity based on a better understa... View full abstract»

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  • IEE Electronics Division: Chairman's address. Computer-aided design in electronics

    Publication Year: 1972, Page(s):17 - 27
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2266 KB)

    The address reviews the development of computer-aided design (c.a.d.) in the last few years. In a historical introduction, the main characteristics of c.a.d. are outlined, particularly the use of interactive computing with time-sharing teletype keyboards or with c.r.t. graphics. The main applications to electronics are then reviewed, including device modelling, circuit analysis, network optimisati... View full abstract»

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  • Filter with periodic phase delay and insertion-loss ripple

    Publication Year: 1972, Page(s):28 - 32
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    An analytical design procedure is presented for the lowpass prototype selective linear phase filter, from which bandpass-channel filters may be deduced, whose insertion-loss and phase-delay-error functions vanish at an optimum number of equidistant points in the passband. Synthesis is performed using an even-and-odd-mode decomposition for a symmetrical filter comprising capacitors and impedance in... View full abstract»

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  • Review of methods for numerical solution of the hollow-waveguide problem

    Publication Year: 1972, Page(s):33 - 37
    Cited by:  Papers (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (923 KB)

    A review is given of current methods for numerically solving the hollow-waveguide problem. Attention is drawn to the relative advantages of the various methods, particularly with regard to their performance with different waveguide shapes. Any requirement for a completely automatic algorithm, or for the computation of fields as well as cutoff values, is also found to put some methods to particular... View full abstract»

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  • Applicability of the Hansen-Woodyard condition

    Publication Year: 1972, Page(s):38 - 40
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (299 KB)

    The Hansen-Woodyard condition is reviewed, and some of its various forms are discussed. For continuous arrays, the directivities for ordinary endfire and Hansen-Woodyard excitation are compared with the maximum obtainable directivity. Similarly, the directivities of discrete arrays, which are optimised with respect to the spacing under the above excitation constraints, are compared with the maximu... View full abstract»

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  • Intermodulation and a.m./p.m. distortion in f.m./f.d.m. radio systems during 2-path propagation

    Publication Year: 1972, Page(s):41 - 47
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (783 KB)

    The total phase distortion on a path of an f.m./f.d.m. radio system under 2-path-propagation conditions consists of two components, intermodulation and amplitude/phase distortion which are not, in general, uncorrelated. It shown in the Appendix that the Taylor-series method of expanding a memoryless nonlinearity is, strictly, never valid in the case of 2-path propagation. The Fourier-series method... View full abstract»

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  • Radiation by a dielectric-loaded cylindrical antenna with a wall airgap

    Publication Year: 1972, Page(s):48 - 54
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (713 KB)

    Previous solutions for the radiation by a cylindrical antenna loaded with a single dielectric layer are extended to the multilayered case. For the sake of convenience, and without any loss of generality, only the 2-layered method of loading is considered by a boundary-value approach. Graphical results are presented to show the effect of the dielectric on the radiation pattern and conductance when ... View full abstract»

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  • Log-periodic transducers for acoustic surface waves

    Publication Year: 1972, Page(s):55 - 60
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (766 KB)

    Nonuniform interdigital transducers, i.e. those in which the periodicity and aperture may vary, can be used to obtain a response not available from uniform transducers. Here, the log-periodic type, which is designed to give a large bandwidth, is investigated, and a bandwidth of 39% is achieved experimentally. Using certain assumptions, a simplified theory for nonuniform transducers is developed. T... View full abstract»

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  • IEE Power Division: Chairman's address. The shape of things to come

    Publication Year: 1972, Page(s):61 - 68
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1970 KB)

    The design of electrical machines is almost entirely a problem concerned with shape. Some of our manufactured articles are the shape they are of necessity. Others may be designed in a variety of shapes within certain rules. For example, a drinking vessel must have at least one concave surface. But many other articles have stayed the same shape for generations purely by tradition. An engineer, who ... View full abstract»

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  • Civil-engineering works for a.c. electrification. Developments since 1960

    Publication Year: 1972, Page(s):69 - 73
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (721 KB)

    An account is given of the change in conditions on British Railways during the period 1960¿1970 which have required developments in methods of achieving clearances for a.c. electrification. Relatively lightweight precast reinforced-concrete arch units have been developed for erection by off-track equipment to replace many existing arch bridges. Different techniques for individual bridges are also... View full abstract»

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  • Calculation of gas pressures in oil-circuit-breaker arc-control pots

    Publication Year: 1972, Page(s):74 - 75
    IEEE is not the copyright holder of this material | PDF file iconPDF (292 KB)
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  • Calculation of system-fault currents due to induction motors

    Publication Year: 1972
    IEEE is not the copyright holder of this material | PDF file iconPDF (152 KB)
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  • Reply: Calculation of system-fault currents due to induction motors

    Publication Year: 1972, Page(s):75 - 76
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | PDF file iconPDF (212 KB)
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  • IEE Control & Automation Division: Chairman's address. Communications in control

    Publication Year: 1972, Page(s):77 - 82
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1213 KB)

    Communications and control can be regarded as complementary components of an overall system, and there should be an adequate match between them at all interfaces. Communications degraded by noise, delays and interruptions can have adverse effects on control performance, but can be mitigated by the proper use of redundancy and by such operations as modelling, statistical filtering and prediction. E... View full abstract»

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  • Combined delay and loss common-control queuing system

    Publication Year: 1972, Page(s):83 - 87
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB)

    The paper presents a detailed study of a combined delay and loss common-control queuing system which has a limited waiting capacity. The common-control queuing system considered is one with a Poisson input, first-come-first-served queue discipline and a negative exponential distribution for both the operating time of the common control and the service time of the server. The stationary-state proba... View full abstract»

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  • Predictive model of an operator in a decision-making task

    Publication Year: 1972, Page(s):88 - 90
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    A model is described in the paper which simulates the behaviour of an operator in a decision-making task where successive decisions must be made at a faster rate as the task proceeds. The model has provided a possible explanation for the discrete-data nature of the human transfer function. View full abstract»

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  • Optimal control of synchronous-machine excitation by quasilinearisation techniques

    Publication Year: 1972, Page(s):91 - 98
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (788 KB)

    This paper describes the application of quasilinearisation techniques in solving nonlinear optimal-control problems in power systems. The computational effectiveness of this method is demonstrated in controlling the excitation to optimise the performance of a synchronous machine simulated as a simple 3rd-order system. The results presented in this paper show that the application of quasilinearisat... View full abstract»

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  • IEE Science, Education & Management Division: Chairman's address. Physics in the service of the engineer

    Publication Year: 1972
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2020 KB)

    The exceptional periods when physics research readily led to innovations of vast consequence in engineering, such as the period of solid-state research which led to the transistor, have tended to obscure the valuable role of physics in providing steady support to technological development. In an attempt to redress the balance, the stress in this review has been placed on the evolutionary role of p... View full abstract»

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  • Square-wave-source gated-detector bridge system for the precise measurement of resistance

    Publication Year: 1972, Page(s):108 - 112
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (645 KB)

    The design and performance of a square-wave system for the precise measurement of resistance are described. A 25 Hz square wave is applied to a conventional resistance bridge, and the output of the bridge is sampled, after the decay of transients owing to reactances, by a gated detector. A single adjustment is sufficient to balance the bridge, and the balance is independent of thermal electromotiv... View full abstract»

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Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

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