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IBM Journal of Research and Development

Issue 3 • May 1968

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Displaying Results 1 - 10 of 10
  • Computation of Molecular Properties and Structure

    Publication Year: 1968, Page(s):206 - 233
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1308 KB)

    A discussion of general-purpose computer programs in theoretical chemistry is given, followed by a description of the procedures adopted in one such program written by the authors. Specific details on the use of the program for computing molecular wave functions and properties for closed-shell linear molecules are presented. The details of a method for computing the axial components of the static ... View full abstract»

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  • Redundant Alphabets with Desirable Frequency Spectrum Properties

    Publication Year: 1968, Page(s):234 - 241
    Cited by:  Papers (33)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (486 KB)

    When alphabets of digital symbols are used to represent information for data processing, storage, and transmission, redundancy in the alphabets is traditionally used for the purpose of error compensation. This paper deals with alphabets of redundant codes, both binary and higher level, where the emphasis is on using redundancy to produce code alphabets with unique properties in their frequency spe... View full abstract»

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  • A Two-Dimensional Mathematical Analysis of the Diffused Semiconductor Resistor

    Publication Year: 1968, Page(s):242 - 250
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (536 KB)

    A two-dimensional mathematical analysis is presented of the electrical properties of the diffused semiconductor resistor. An important conclusion is that substantially more electric current crowding exists within this semiconductor device than heretofore suspected, particularly in the vicinity of the ohmic contacts. Considered in this analysis is the influence on the electrical characteristics of ... View full abstract»

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  • High-resolution Positive Resists for Electron-beam Exposure

    Publication Year: 1968, Page(s):251 - 256
    Cited by:  Papers (18)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (453 KB)

    This paper examines the utility of four newly proposed positive resists whose processing combines electron-beam-induced degradation of certain polymers and, subsequently, in situ fractionation according to molecular weight. Positive-resist action in four systems formulated on this concept has been demonstrated. Typical sensitivity in electron-beam exposure is 10−4 coulomb/cm... View full abstract»

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  • Effects of Lasers on the Human Eye

    Publication Year: 1968, Page(s):257 - 271
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (880 KB)

    In dealing with the relationship between human vision and lasers, this largely theoretical paper places particular emphasis upon the use of lasers within the normal operating range of the visual system, and upon the mechanisms by which laser radiation can cause threshold damage to the eye. Parallel but subordinate sections present some fundamentals of laser radiation, of the relevant aspects of th... View full abstract»

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  • Room Temperature Delay Times in Diffused Junction GaAs Injection Lasers

    Publication Year: 1968, Page(s):272 - 274
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (262 KB)

    One nanosecond room temperature delay times at current levels slightly above threshold have been obtained in GaAs injection lasers using a two step diffusion process. Copper contamination is found to leave the delay time unchanged, but increases the rise time. View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1968, Page(s):275 - 277
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (297 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):278 - 279
    IEEE is not the copyright holder of this material | PDF file iconPDF (272 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1968, Page(s):280 - 281
    IEEE is not the copyright holder of this material | PDF file iconPDF (217 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1968, Page(s):284 - 285
    IEEE is not the copyright holder of this material | PDF file iconPDF (245 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