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IBM Journal of Research and Development

Issue 3 • July 1957

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Displaying Results 1 - 12 of 12
  • Table of Contents

    Publication Year: 1957, Page(s): 197
    IEEE is not the copyright holder of this material | PDF file iconPDF (189 KB)
    Freely Available from IEEE
  • Development of the Permissive-Make Relay

    Publication Year: 1957, Page(s):198 - 211
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (737 KB)

    The development of a new relay is described which meets the need for an improved general-purpose relay for use in existing and future business machines. Long life, reliability, higher speed, low power input and manufacturing economy are realized in the Permissive-Make Relay through the following factors: a new contact system; a balanced force system; optimum magnet design; limited tolerance buildu... View full abstract»

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  • Two-Collector Transistor for Binary Full Addition

    Publication Year: 1957, Page(s):212 - 222
    Cited by:  Papers (7)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (662 KB)

    Details are given of the design and operational features of two versions of a new multielectrode transistor which serves as a full adder for binary numbers in computer circuits. This transistor in a simple circuit connection performs the logical operations “and,” “or,” “exclusive or,” “if-and-only-if,” “neither-nor,” “not... View full abstract»

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  • Spatial Variation of Currents and Fields Due to Localized Scatterers in Metallic Conduction

    Publication Year: 1957, Page(s):223 - 231
    Cited by:  Papers (61)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (518 KB)

    Localized scatterers can be expected to give rise to spatial variations in the electric field and in the current distribution. The transport equation allowing for spatial variations is solved by first considering the homogeneous transport equation which omits electric fields. The homogeneous solution gives the purely diffusive motion of current carriers and involves large space charges. The electr... View full abstract»

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  • Microwave Amplification by MASER Techniques

    Publication Year: 1957, Page(s):232 - 238
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (481 KB)

    A new amplification principle, that of Microwave Amplification by Stimulated Emission of Radiation (MASER), has already demonstrated its potentialities for low-noise, narrow-band amplification. The present note presents an elementary analysis of MASER operation, including its potentiality for broadband, short-transit-time amplification. View full abstract»

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  • The Linear Hall Effect

    Publication Year: 1957, Page(s):239 - 248
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    A new method for handling the Boltzmann equation is used to obtain, without approximation, a general formula for the linear Hall effect in a solid electronic conductor. Expressions for the conductivity in no magnetic field and for the quadratic magnetoconductivity are also obtained. These formulas introduce a vector mean free path, not in general parallel to the electron velocity, which is related... View full abstract»

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  • Literary Data Processing

    Publication Year: 1957, Page(s):249 - 256
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (618 KB)

    A method is presented for rapid compilation of analytical indexes and concordances of printed works, using either a conventional punched-card system or an electronic data processing machine. A detailed description of the procedures used in automatically analyzing and indexing the Summa Theologica of St. Thomas Aquinas is given. Reference is also made to the indexing of the Dead Sea Scrolls using a... View full abstract»

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  • An Experimental 50-Megacycle Arithmetic Unit

    Publication Year: 1957, Page(s):257 - 278
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1012 KB)

    An experimental 50-megacycle arithmetic unit has been built which performs a repetitive multiplication program and checks the results for errors. The unit uses pulse circuitry which has been developed to perform digital operations at a 50-megacycle pulse-repetition rate. This paper describes the arithmetic system and the circuits which perform the required functions. These circuits include a full ... View full abstract»

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  • Microsectioning: A Metallographic Technique for Semiconductor Devices

    Publication Year: 1957, Page(s):279 - 288
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (747 KB)

    A microsectioning technique is described that enables metallographic sectioning of fragile semiconductor devices without the difficulties and specimen damage associated with the use of conventional techniques. Major advantages are (a) maintenance of a planar surface on specimens having adjoining areas of widely varying physical characteristics, (b) preservation of boundary details between such are... View full abstract»

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  • IBM Technical Papers Published in Other Journals

    Publication Year: 1957, Page(s):289 - 290
    IEEE is not the copyright holder of this material | PDF file iconPDF (273 KB)
    Freely Available from IEEE
  • Recent IBM Patents

    Publication Year: 1957, Page(s): 291
    IEEE is not the copyright holder of this material | PDF file iconPDF (151 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1957, Page(s): 292
    IEEE is not the copyright holder of this material | PDF file iconPDF (137 KB)
    Freely Available from IEEE

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Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center