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IBM Journal of Research and Development

Issue 6 • Date Nov. 1967

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Displaying Results 1 - 11 of 11
  • Some Computer Aspects of Meteorology

    Publication Year: 1967, Page(s):584 - 600
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (973 KB)

    A long history of large-scale scientific computing is associated with numerical weather prediction. Recently, interest in this field has been renewed as a result of international studies concerning the feasibility of a global observation and analysis experiment preliminary to the World Weather Watch. This paper describes the physical phenomena occurring in the atmosphere and the problems of modeli... View full abstract»

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  • Some Studies in Machine Learning Using the Game of Checkers. II—Recent Progress

    Publication Year: 1967, Page(s):601 - 617
    Cited by:  Papers (54)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (885 KB)

    A new signature table technique is described together with an improved book learning procedure which is thought to be much superior to the linear polynomial method described earlier. Full use is made of the so called “alpha-beta” pruning and several forms of forward pruning to restrict the spread of the move tree and to permit the program to look ahead to a much greater depth than it... View full abstract»

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  • Similar Motion of Two-Degree-of-Freedom Nonlinear Vibrating Systems with Nonsymmetric Springs

    Publication Year: 1967, Page(s):618 - 626
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (656 KB)

    If similar motion occurs, it is demonstrated by a straight line (linear trajectory) in the configuration space whose orthogonal coordinates are the displacements of the masses in the vibrating system. Since the systems considered are conservative, all solutions of the equations of motion must satisfy the Principle of Least Action and its Euler-Lagrange equation. The solution of this equation defin... View full abstract»

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  • SCEPTRE: A Program for Automatic Network Analysis

    Publication Year: 1967, Page(s):627 - 637
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (569 KB)

    This paper describes the mathematical formulation of a computer program for automatic transient analysis of electronic networks. The formulation is based on the “state-variable” approach to network analysis and differs from other such programs primarily in the way that the network equations are manipulated to produce a solution. SCEPTRE includes a number of features aimed at providin... View full abstract»

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  • Synthesis of Transfer Functions in a Prescribed Frequency Band

    Publication Year: 1967, Page(s):638 - 642
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (434 KB)

    A signal-processing system for synthesizing complicated transfer functions in a prescribed frequency band is described. The system consists of a multiplier followed by a closed loop containing a delay line and phase modulator in series. One of the inputs to the multiplier is the signal to be filtered. The second input to the multiplier is periodic, the period being equal to the loop delay. One cyc... View full abstract»

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  • Exposure Control in a Multi-Stage Photographic System

    Publication Year: 1967, Page(s):643 - 647
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (349 KB)

    The use of controlled exposure in microfilming original documents offers a practical method for producing high-contrast images at subsequent printing stages with constant exposure times. This type of control, used for the three-stage generation of images in a developmental photo-image retrieval system, has given excellent results for documents which have uniform line-density contrast. For variable... View full abstract»

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  • Two Remarks on the Reconstruction of Sampled Non-Bandlimited Functions

    Publication Year: 1967, Page(s):648 - 649
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    This communication considers the error in the reconstruction of a deterministic, non-bandlimited real function from its sampled values. We have two objectives in mind. First, we show that in a certain sense, to be made precise in the sequel, the error in the reconstruction of f(t) from its sampled values f(nπ/Ω) by sin x/x interpolation is small provided the portion of the amplitude ... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journals

    Publication Year: 1967, Page(s):650 - 661
    IEEE is not the copyright holder of this material | PDF file iconPDF (796 KB)
    Freely Available from IEEE
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1967, Page(s):662 - 663
    IEEE is not the copyright holder of this material | PDF file iconPDF (271 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1967, Page(s): 664
    IEEE is not the copyright holder of this material | PDF file iconPDF (165 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1967, Page(s):666 - 667
    IEEE is not the copyright holder of this material | PDF file iconPDF (252 KB)
    Freely Available from IEEE

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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