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IBM Journal of Research and Development

Issue 2 • Date March 1968

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Displaying Results 1 - 10 of 10
  • Method for Estimation and Optimization of Printer Speed Based on Character Usage Statistics

    Publication Year: 1968, Page(s):130 - 139
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (555 KB)

    Many high-speed printers now in the field and under development use a constantly moving chain or train containing the characters required in the printing process. Generally they skip to the next line whenever the last character on a given line is printed. Since individual character usage varies widely, it may be possible to increase the printing speed by repeating high-usage characters more freque... View full abstract»

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  • Polymer Dielectric Films

    Publication Year: 1968, Page(s):140 - 162
    Cited by:  Papers (1)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1114 KB)

    Polymer dielectric films, ranging in thickness from less than 100 A to several microns, have become increasingly useful for basic investigations of surface phenomena and thin film electrical conductivity and for thin film electronic device and circuit development. The preparation and characterizing properties of thin polymer films are discussed with particular emphasis on recent developments in su... View full abstract»

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  • Computer Algorithm for Spectral Factorization of Rational Matrices

    Publication Year: 1968, Page(s):163 - 170
    Cited by:  Papers (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    An algorithm is derived for the numerical spectral factorization of matrices arising in optimal filter design. The method uses a bilinear transformation to convert the factorization problem into a stable nonlinear difference equation of the Riccati type. The computer solution of several examples is presented to illustrate the technique. View full abstract»

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  • Automatic Focus Control of Charged-Particle Beams

    Publication Year: 1968, Page(s):171 - 179
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (529 KB)

    The focusing mechanism for charged-particle beams is analyzed and its mathematical model is derived. Two control concepts for focusing electron beams are shown and the details of the feedback system for automatic focus control in the electron-beam recorder of an IBM photo-digital mass storage system are described (Fig. 9). Included are a representation of the mathematical system and the computer s... View full abstract»

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  • Application of Finite Geometry in File Organization for Records with Multiple-Valued Attributes

    Publication Year: 1968, Page(s):180 - 187
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (475 KB)

    The schemes for organizing binary-valued records using finite geometries have been extended to the situation in which the attributes of the records can take multiple values. Some new schemes for organizing records have been proposed which are based on deleted finite geometries. These new schemes permit the organization of records into buckets in such a manner that, by solving certain algebraic lin... View full abstract»

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  • The Study of Laser-induced Absorption of a Secondary Light Beam in Molecular Liquids and Solutions

    Publication Year: 1968, Page(s):188 - 191
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    New techniques are shown for determining the change in absorption spectrum of molecular liquids when a laser beam is passed through the sample. Two-photon absorption measurements are shown for α-chloronaphthalene. The experimental arrangement (Fig. 3) features a high signal-to-noise ratio and permits study of explicit time dependence of the absorption signal. View full abstract»

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  • Reflectivity Thickness Corrections for Silicon Dioxide Films on Silicon for VAMFO [Letter to the Editor]

    Publication Year: 1968, Page(s):192 - 194
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | PDF file iconPDF (369 KB)
    Freely Available from IEEE
  • Recent Papers by IBM Authors

    Publication Year: 1968, Page(s):195 - 197
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (282 KB)

    Reprints of the papers listed here may usually be obtained most efficiently by writing directly to the authors. The authors' IBM divisions and locations are identified as follows: ASDD is the Advanced Systems Development Division; CD, Components Division; DPD, Data Processing Division; FSD, Federal Systems Division; RES, Research Division: and SDD, Systems Development Division. East Fishkill, Endi... View full abstract»

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  • Patents Recently Issued to IBM Inventors

    Publication Year: 1968, Page(s):198 - 199
    IEEE is not the copyright holder of this material | PDF file iconPDF (274 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1968, Page(s):200 - 201
    IEEE is not the copyright holder of this material | PDF file iconPDF (201 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