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IBM Journal of Research and Development

Issue 4 • Date Oct. 1961

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Displaying Results 1 - 13 of 13
  • The Electronic Contribution to the Elastic Properties of Germanium

    Publication Year: 1961 , Page(s): 266 - 278
    Cited by:  Papers (6)
    Click to expandAbstract | PDF file iconPDF (1134 KB)  

    Theories of several elastic effects resulting from the contribution of electrons to the strain energy function of germanium are presented. They show that the elastic properties are appreciably changed by doping with donor and acceptor impurities. The properties considered are: (1) volume, (2) elastic constants of degenerate n-type material, (3) third-order elastic constants of degenerate n-type ma... View full abstract»

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  • Dislocations and Plastic Flow in Germanium

    Publication Year: 1961 , Page(s): 279 - 286
    Click to expandAbstract | PDF file iconPDF (827 KB)  

    Single-crystal specimens of germanium have been tested in tension over a range of temperature and strain rate. Dislocation density has been determined as a function of plastic strain, and some direct measurements of dislocation velocity have been made. From these results the plastic behavior of germanium can be explained in terms of dislocation velocity and dislocation multiplication, and is analo... View full abstract»

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  • A High Track-Density Servo-Access System for Magnetic Recording Disk Storage

    Publication Year: 1961 , Page(s): 287 - 296
    Cited by:  Papers (4)  |  Patents (1)
    Click to expandAbstract | PDF file iconPDF (1048 KB)  

    This paper is concerned with an investigation of the feasible track-density potential of random-access magnetic-disk storage where magnetic-head positioning is essential. Primary emphasis is given to a novel, servo-access concept (closed-looped head-positioning control which includes the record member) for track location and registration. This servo concept has been investigated as a means of maki... View full abstract»

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  • Lognormal Distribution Function for Describing Anelastic and Other Relaxation Processes I. Theory and Numerical Computations

    Publication Year: 1961 , Page(s): 297 - 311
    Cited by:  Papers (2)
    Click to expandAbstract | PDF file iconPDF (1280 KB)  

    Such phenomena as dielectric, magnetic, and anelastic relaxation are often described in terms of a distribution of relaxation times. It is shown that a relaxation process which exhibits a Gaussian distribution in the logarithm of the relaxation times (a “lognormal” distribution) can be specified completely by three parameters. These are: the mean relaxation time (τm... View full abstract»

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  • Lognormal Distribution Function for Describing Anelastic and Other Relaxation Processes II. Data Analysis and Applications

    Publication Year: 1961 , Page(s): 312 - 320
    Click to expandAbstract | PDF file iconPDF (933 KB)  

    The present paper deals with the use of the theory and computations given in Part I for a relaxation process governed by a lognormal distribution of relaxation times. The experimental determination of the basic parameters appearing in the theory is shown to require the application of a number of corrections to the usual type of dynamical data. General expressions are derived for these corrections,... View full abstract»

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  • A Study of the Playback Process of a Magnetic Ring Head

    Publication Year: 1961 , Page(s): 321 - 325
    Cited by:  Papers (59)
    Click to expandAbstract | PDF file iconPDF (522 KB)  

    The playback process of a magnetic ring head with finite permeability of head and tape are studied, using the theorem of reciprocity. In order to obtain an accurate result for the playback process, the field around a magnetic gap is studied by a Fourier method. The shift of the gap null for infinite permeability of the head as calculated by Westmijze is confirmed, and the new shift is found when t... View full abstract»

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  • A Note on Hall Probe Resolution [Letter to the Editor]

    Publication Year: 1961 , Page(s): 326 - 327
    PDF file iconPDF (300 KB)  
    Freely Available from IEEE
  • The Chargistor, a New Class of Semiconductor Devices [Letter to the Editor]

    Publication Year: 1961 , Page(s): 328 - 330
    Cited by:  Papers (2)
    PDF file iconPDF (450 KB)  
    Freely Available from IEEE
  • Monte Carlo Analysis of Transistor Diffusion Techniques [Letter to the Editor]

    Publication Year: 1961 , Page(s): 331 - 334
    Cited by:  Papers (2)
    PDF file iconPDF (438 KB)  
    Freely Available from IEEE
  • A Network Minimization Problem [Letter to the Editor]

    Publication Year: 1961 , Page(s): 335 - 337
    PDF file iconPDF (365 KB)  
    Freely Available from IEEE
  • IBM Technical Papers Published in Other Journals

    Publication Year: 1961 , Page(s): 338 - 348
    PDF file iconPDF (1103 KB)  
    Freely Available from IEEE
  • Recent IBM Patents

    Publication Year: 1961 , Page(s): 349 - 350
    PDF file iconPDF (262 KB)  
    Freely Available from IEEE
  • Authors

    Publication Year: 1961 , Page(s): 351 - 352
    PDF file iconPDF (284 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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Meet Our Editors

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