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IBM Journal of Research and Development

Issue 3 • Date July 1959

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Displaying Results 1 - 11 of 11
  • Some Studies in Machine Learning Using the Game of Checkers

    Publication Year: 1959 , Page(s): 210 - 229
    Cited by:  Papers (139)  |  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (895 KB)  

    Two machine-learning procedures have been investigated in some detail using the game of checkers. Enough work has been done to verify the fact that a computer can be programmed so that it will learn to play a better game of checkers than can be played by the person who wrote the program. Furthermore, it can learn to do this in a remarkably short period of time (8 or 10 hours of machine-playing time) when given only the rules of the game, a sense of direction, and a redundant and incomplete list of parameters which are thought to have something to do with the game, but whose correct signs and relative weights are unknown and unspecified. The principles of machine learning verified by these experiments are, of course, applicable to many other situations. View full abstract»

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  • Some Properties of Experimental 1000-Mc Transistors

    Publication Year: 1959 , Page(s): 230 - 236
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (401 KB)  

    Experimental transistors designed to operate above 1000 Mc are described and measurements of their electrical parameters discussed. The design is a diffused-base drift transistor structure with minimized bulk resistances and junction capacitances. Measurements of the short-circuit current gain (−h21p) with both emitter and collector reverse-biased, indicated that the passive circuit comprising extrinsic parameters only could produce a gain greater than unity. Interpretation of measurements using a simplified equivalent circuit shows that reduction of bulk resistances leads to an appreciable passive or feed-through current. An oscillator is described in which the transistors operated up to 1550 Mc. View full abstract»

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  • A Gas Film Lubrication Study—Part I: Some Theoretical Analyses of Slider Bearings

    Publication Year: 1959 , Page(s): 237 - 255
    Cited by:  Papers (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (793 KB)  

    The Reynolds differential equation describing flow in a compressible lubricating film is developed. Important characteristics of such films are determined directly from the Reynolds Equation. Pressure, load, velocity, and geometry characteristics are presented for many compressible slider bearing films based upon computer solutions of a Reynolds difference equation as derived in Part II. Part III cites experimental verification of computer solutions and describes experimental techniques. View full abstract»

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  • A Gas Film Lubrication Study—Part II: Numerical Solution of the Reynolds Equation for Finite Slider Bearings

    Publication Year: 1959 , Page(s): 256 - 259
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (344 KB)  

    This paper presents a finite-difference technique for obtaining approximate numerical solutions to the Reynolds partial differential equation of gas film lubrication theory. A digital computer program is described, and discretization errors and stability of the difference equations are discussed. View full abstract»

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  • A Gas Film Lubrication Study—Part III: Experimental Investigation of Pivoted Slider Bearings

    Publication Year: 1959 , Page(s): 260 - 274
    Cited by:  Papers (6)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (676 KB)  

    The results of experimental measurements on pivoted slider bearings are presented, the experimental methods are described, and the experimental data are compared with data obtained from a numerical solution of the Reynolds differential equation for a compressible fluid. View full abstract»

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  • Experiments on The Relation of the Operator to the Control Loop Of an Airborne Digital Computer

    Publication Year: 1959 , Page(s): 275 - 281
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (623 KB)  

    Some laboratory experiments were performed over a period of three years to provide design information for digital computer systems for error correction in aircraft navigation. In a simulated digital control loop, the operator observed crosshair error and fed control signals to the computer. The studies showed relationships between recovery time and solution rate, transmission delays, hand-control sensitivity, sampling rate, and scanning rate. View full abstract»

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  • A Learning Machine: Part II

    Publication Year: 1959 , Page(s): 282 - 287
    Cited by:  Papers (20)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (759 KB)  

    An effort is made to improve the performance of the learning machine described in Part I, and the over-all effect of various changes is considered. Comparative runs by machines without the scoring mechanism indicate that the grading of individual instructions can aid in the learning process. A related study is made in which automatic debugging of programs is taken as a special case of machine search. The ability to partition problems and to deal with parts in order of difficulty proves helpful. View full abstract»

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  • Indexing and Control-Word Techniques

    Publication Year: 1959 , Page(s): 288 - 301
    Cited by:  Papers (4)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1215 KB)  

    In large-scale computers the details of data handling, such as indexing, transmission and ordering, may be performed either by programming or by built-in machine operations. An analysis of the most frequently performed functions justifies the expansion of single-valued index quantities to three-valued control words and the specification of built-in increment, count and refill operations to be used with these control words. STRETCH, the large-scale computer which is being developed by IBM for the Los Alamos Scientific Laboratory, provides these control-word functions for data-handling operations. View full abstract»

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  • IBM Technical Papers Published in Other Journals

    Publication Year: 1959 , Page(s): 302 - 306
    Save to Project icon | PDF file iconPDF (625 KB)  
    Freely Available from IEEE
  • Recent IBM Patents

    Publication Year: 1959 , Page(s): 307 - 308
    Save to Project icon | PDF file iconPDF (256 KB)  
    Freely Available from IEEE
  • Authors

    Publication Year: 1959 , Page(s): 309 - 310
    Save to Project icon | PDF file iconPDF (233 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