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IBM Journal of Research and Development

Issue 4 • Date Oct. 1963

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Displaying Results 1 - 17 of 17
  • Nonlinear Wave Propagation in a Transmission Line Loaded with Thin Permalloy Films

    Publication Year: 1963, Page(s):278 - 287
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (462 KB)

    This paper considers the propagation of waves in a transmission line loaded with thin permalloy films. Since the films are driven to saturation, the transmission line equations which are derived to describe the wave propagation are nonlinear. The nonlinearity requires the use of shock wave analyses, and a derivation of the appropriate shock relations is included. The problems of a line loaded with... View full abstract»

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  • A Theoretical Model for Separation in the Fluid Jet Amplifier

    Publication Year: 1963, Page(s):288 - 296
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (540 KB)

    A theoretical study, based on the re-entrant jet model, is made of the growth of the separation region in the fluid jet amplifier. The flow is taken to be inviscid but dissipation of momentum is obtained by means of the re-entrant jet. The effect of control port pressure and wall angle on the size of the separation region is calculated. Several other versions of the model are suggested. View full abstract»

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  • Prenucleation of Lead Films with Copper, Gold, and Silver

    Publication Year: 1963, Page(s):297 - 302
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (413 KB)

    Lead films evaporated onto thin nucleating layers of Cu, Ag, and Au were studied by the techniques of electron diffraction and electron microscopy. Electron micrographs indicated that films nucleated with Au become continuous much sooner than films nucleated with Ag or Cu. Examination of the diffraction pattern showed Au to be the only metal of the three to form an intermetallic compound with lead... View full abstract»

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  • Analysis and Numerical Calculations of the Dynamic Behavior of Plane Pivoted Slider Bearings

    Publication Year: 1963, Page(s):303 - 316
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (674 KB)

    The dynamic behavior of plane, self-acting, pivoted slider bearings of infinite length is examined for the case of an incompressible lubricating film. The equations of motion for the slider are derived, with the lubricant force expressed in terms of the motion-coordinates and their derivatives and of the parameters that characterize the system. Equilibrium positions of the system are determined nu... View full abstract»

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  • Automatic Correction of Multiple Errors Originating in a Computer Memory

    Publication Year: 1963, Page(s):317 - 324
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (413 KB)

    An error correction unit has been installed in an IBM RAMAC® 305 to demonstrate automatic correction of burst errors originating in a computer memory. Employing a cyclic code requiring two percent redundancy, the unit has successfully corrected all four-bit and most five-bit error bursts in a 100-character record stored on a defective disk. Details of the error correction unit and test resu... View full abstract»

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  • A Data Display Subsystem

    Publication Year: 1963, Page(s):325 - 333
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (491 KB)

    A cathode ray tube device is described in which up to 4000 flicker-free characters are displayed dynamically. The developmental system is designed to permit monitoring the display while data are inserted, deleted or corrected by means of a keyboard. This system uses a novel positioning method which combines electrostatic and magnetic techniques. View full abstract»

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  • Nonlinear Absorbers of Light

    Publication Year: 1963, Page(s):334 - 336
    Cited by:  Papers (3)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (295 KB)

    A nonlinear absorber of light is a substance having an unique property: its optical absorptivity is altered by light irradiation. The phenomenon is known as photochromism when the changes in optical absorbtivity are in such a wavelength range and on such a time scale as to be visually apparent. Photochromism has long been a plague to dye manufacturers. It has recently been the basis of many curiou... View full abstract»

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  • Tagging Techniques for Incorporating Microglossaries in an Automatic Dictionary

    Publication Year: 1963, Page(s):337 - 339
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    Microglossaries have been frequently suggested as a practical solution to some of the semantic and homonym problems encountered in automatic tran~lation.1–4 This Communication indicates a systematic approach to solving those problems. View full abstract»

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  • Automatic Step-Size Control for Rung-Kutta Integration

    Publication Year: 1963, Page(s):340 - 341
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (253 KB)

    In a recent paper Chase1 investigated the stability of various predictor-corrector methods. He showed among other things that during integration of the initial value problem y′ = −a·y + b, y(0) = 0, a > 0, the modified Hamming method exhibits instability at an integration step h with h·a ≥ 0.85. It can be shown that the well known fourth-order R... View full abstract»

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  • High-Speed Photographs of Laser-Induced Heating

    Publication Year: 1963, Page(s):342 - 344
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (362 KB)

    This Communication presents some high-speed photographs showing the effects of high-energy, focused laser beams striking targets of steel, brass, and aluminum. For the light flux densities used, these photographs seem to support recent speculation1–3 that the absorption of intense laser radiation will heat the material at some depth below the surface to its vaporization temperatu... View full abstract»

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  • Diffraction by a Finite Sinusoidal Phase Grating

    Publication Year: 1963, Page(s):345 - 349
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (326 KB)

    The exact expressions for the diffraction pattern produced by a single sinusoidal groove and for finite gratings have been derived and compared with the expressions commonly used. We have shown that the usual approximations are valid only in the limit of gratings with an infinite number of grooves. Attention is given to the case of color thermoplastic recording, where the number of grooves is expe... View full abstract»

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  • On a Queueing Problem Arising in Recirculating Memories

    Publication Year: 1963, Page(s):350 - 352
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (295 KB)

    This Communication considers a queueing problem that arises in the design and evaluation of circulating types of computer storage devices, such as magnetic drums. This many-line, many-server queueing problem is treated using approximate methods, and the distribution is determined for the number of items waiting in one of the lines. View full abstract»

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  • Further Results in Polynomial Addressing [Letter to the Editor]

    Publication Year: 1963, Page(s):353 - 354
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | PDF file iconPDF (268 KB)
    Freely Available from IEEE
  • An Amendment to “A Theoretical Solution for the Magnetic Field in the Vicinity of a Recording Head Air Gap” [Letter to the Editor]

    Publication Year: 1963, Page(s): 355
    IEEE is not the copyright holder of this material | PDF file iconPDF (186 KB)
    Freely Available from IEEE
  • IBM Technical Papers Published Recently in Other Journals

    Publication Year: 1963, Page(s):356 - 371
    IEEE is not the copyright holder of this material | PDF file iconPDF (942 KB)
    Freely Available from IEEE
  • Recent IBM Patents

    Publication Year: 1963, Page(s):372 - 373
    IEEE is not the copyright holder of this material | PDF file iconPDF (259 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1963, Page(s):374 - 376
    IEEE is not the copyright holder of this material | PDF file iconPDF (215 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