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IBM Journal of Research and Development

Issue 2 • Date April 1961

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Displaying Results 1 - 10 of 10
  • Table Look-up Procedures in Language Processing—Part I: The Raw Text

    Publication Year: 1961, Page(s):86 - 92
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (780 KB)

    A method of addressing memories is described which is very powerful in the processing of natural languages, where the arithmetic or logical operations are either nonexistent or do not lend themselves to algorithmic description. The main feature is the guarantee of initiation of an exhaustive search for a linguistic word at a point just beyond the desired address. Sequential search backwards not on... View full abstract»

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  • Phase Reversal Data Transmission System for Switched and Private Telephone Line Applications

    Publication Year: 1961, Page(s):93 - 105
    Cited by:  Papers (5)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (950 KB)

    A phase reversal data transmission system is described, capable of operating at 2000 bauds over private telephone lines and at 1200 bauds over switched networks. The advantages and limitations of the system are discussed from a theoretical and practical standpoint. The clocking problem in data transmission is considered and several approaches are indicated. A summary is given of extensive field te... View full abstract»

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  • A Magnetic Associative Memory

    Publication Year: 1961, Page(s):106 - 121
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1284 KB)

    This paper describes a computer storage system in which data flows in and out of the memory on the basis of content rather than location (address). In addition, a small experimental model of this system is described, using ferrite cores as novel associative memory storage elements. View full abstract»

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  • Acoustic-Mode Scattering of Holes

    Publication Year: 1961, Page(s):122 - 131
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (779 KB)

    Matrix elements are calculated for acoustic-mode scattering of holes in the valence band structure typified by germanium. Whitfield's generalization of the deformation potential theorem is used to calculate the electron-phonon interaction; his method is, however, extended to include the spin-lattice coupling. A general expression for the electron-phonon interaction matrix element is obtained, and ... View full abstract»

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  • Analysis of a Basic Queuing Problem Arising in Computer Systems

    Publication Year: 1961, Page(s):132 - 140
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (705 KB)

    A model which describes a basic junction, or queuing structure, arising in a general computing system is subjected to a mathematical analysis. The results consist of several formulas describing the performance of various parts of the system. The feasibility in analyzing general queuing problems in this manner is stated, together with the results of a Monte Carlo simulation used for comparison purp... View full abstract»

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  • A Direct Digital Method of Power Spectrum Estimation

    Publication Year: 1961, Page(s):141 - 156
    Cited by:  Papers (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1237 KB)

    This paper discusses a method of digital power spectrum estimation involving the direct combination of the sample time function with sines and cosines. This treatment is in contrast to the normal indirect digital method which proceeds through the intermediary of the autocovariance function. All the practical design details necessary for the planning of a spectral estimation program are treated. View full abstract»

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  • The Dynamics of a Subharmonic Oscillator with Linear Dissipation

    Publication Year: 1961, Page(s):157 - 161
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    A mathematical analysis of the dynamic behavior of subharmonic oscillators (parametrons) is made assuming a nonlinear reactance but a linear dissipation or resistance. Simple equations of motion for the subharmonic and pump amplitudes are derived in the quasistatic, or high-Q, approximation. Numerical solutions are obtained for two cases. The first shows the subharmonic amplitude changing from a s... View full abstract»

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  • IBM Technical Papers Published in Other Journals

    Publication Year: 1961, Page(s):162 - 169
    IEEE is not the copyright holder of this material | PDF file iconPDF (954 KB)
    Freely Available from IEEE
  • Recent IBM Patents

    Publication Year: 1961, Page(s):170 - 171
    IEEE is not the copyright holder of this material | PDF file iconPDF (264 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1961, Page(s):172 - 173
    IEEE is not the copyright holder of this material | PDF file iconPDF (253 KB)
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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