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IEE Proceedings E - Computers and Digital Techniques

Issue 4 • Date July 1984

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Displaying Results 1 - 13 of 13
  • Computing & Control Division: Divisional lecture

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (103 KB)
    Freely Available from IEEE
  • Past, present and future of the computer field

    Publication Year: 1984, Page(s):106 - 112
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1299 KB)

    The paper surveys some of the landmarks that have been passed as the computer field has developed from its early inception and comments on some of the issues that are now claiming attention. The paper is based on a lecture given by Prof. Wilkes to the IEE on 16th February 1984. View full abstract»

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  • An algorithm for the partitioning of logic circuits

    Publication Year: 1984, Page(s):113 - 118
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (737 KB)

    The exhaustive testing of today's digital circuits is not possible, owing to the vast test sequences which would have to be applied. Breaking down the circuit into manageable subcircuits (partitioning) makes exhaustive testing practicable. Partitioning has previously been done by the designer of the circuit in rather an ad hoc manner. The paper describes an algorithm which can be used to find the ... View full abstract»

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  • A review of synchronisation and matching in fault-tolerant systems

    Publication Year: 1984, Page(s):119 - 124
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (972 KB)

    The paper reviews the reasons for and the problems of synchronising the processors of a faulttolerant system and of matching the data in them. It is known that exact solutions require at least (3t + 1) channels for t-fault-tolerance, but that more economical solutions with only (2t + 1) channels are feasible when assumptions are made which ensure consistent data in the fault-free processors. The a... View full abstract»

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  • Programmable variable-rate up/down counter for generating binary logarithms

    Publication Year: 1984, Page(s):125 - 131
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (888 KB)

    The design of an algorithm for a programmable variable-rate counter for generating precise binary logarithmic functions is presented. The error in log2(l + x), as defined by Iog2(l + x) ¿¿ x, may be considered as a set of straight lines whose slopes, either positive or negative, are chosen to be integral multiples of a binary fraction. By using a programmable counter whose rate is proportional to ... View full abstract»

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  • Electronic control of small hydroelectric schemes using a microcomputer

    Publication Year: 1984, Page(s):132 - 136
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (747 KB)

    The role of electronic load controllers in reducing the cost of small hydro schemes is explained with particular reference to the situation in Papua New Guinea. A prototype controller based on an AIM 65 microcomputer is described. Program algorithm and input/output circuitry are covered in detail. Conditions necessary for stable load controller operation are discussed and quantified. Laboratory an... View full abstract»

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  • Method of storing route guidance information using quadtrees

    Publication Year: 1984, Page(s):137 - 142
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (777 KB)

    An electronic route guidance system employing roadside processors will benefit from the provision of a compact method of storing directional information, especially when a large network is involved. This may be particularly relevant where roadside units are periodically downloaded from a central installation. A form of quadtree, the partition tree, offers very efficient data storage together with ... View full abstract»

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  • Digital line segment coding: A new efficient contour coding scheme

    Publication Year: 1984, Page(s):143 - 147
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (650 KB)

    A new coding scheme is proposed for two-tone image contours. The basic idea is to detect digital line segments on the contour and code them using fixed- or variable-length codewords; the present work deals mainly with fixed-length codewords. It is demonstrated that the conventional contour run length coding by Freeman's chain code is a special case of this scheme. The data compressibility of the s... View full abstract»

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  • Time-memory tradeoff in exponentiating a fixed element of GF(qn) requiring a short reference to the memory

    Publication Year: 1984, Page(s):148 - 150
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (430 KB)

    Raising ¿¿x to the yth power over GF(qn) can be performed by calculating ¿¿y modulo the minimum polynomial of ¿¿xand then multiplying the result by an n ¿¿ n matrix over GF(q). The elements of the matrix are only a function of x and of the generating polynomial of the field. This principle offers a time-memory trade-off when exponentiating a fixed element of GF(qn), where the multiplications (not ... View full abstract»

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  • Digital encoding by means of new T-codes to provide improved data synchronisation and message integrity

    Publication Year: 1984, Page(s):151 - 153
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    A new class of variable-length synchronisable codes offers improved data integrity in the presence of additive and timing errors. Character synchronisation occurs automatically during normal decoding procedures. The estimated improvements obtainable using these codes in the transmission of ASCII text over a noisy channel are shown in a comparison with conventional serial code systems. View full abstract»

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  • Man-Computer Interaction: Human Factors Aspects of Computers and People

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (192 KB)
    Freely Available from IEEE
  • Computer Controlled Testing and Instrumentation

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (235 KB)
    Freely Available from IEEE
  • Erratum: Shared memories in the CYBA-M multiprocessor

    Publication Year: 1984, Page(s):155 - 156
    IEEE is not the copyright holder of this material | PDF file iconPDF (235 KB)
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