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IBM Journal of Research and Development

Issue 1 • Date Jan. 1973

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Displaying Results 1 - 13 of 13
  • Steady State Mathematical Theory for the Insulated Gate Field Effect Transistor

    Publication Year: 1973, Page(s):2 - 12
    Cited by:  Papers (23)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (612 KB)

    A two-dimensional mathematical analysis is presented of the mechanisms of operation for an insulated gate field effect transistor (IGFET). Included in this analysis are qualitative and quantitative comparisons between conventional one-dimensional theory and a rigorous two-dimensional computer solution for the IGFET. It is shown that many characteristics of device operation deduced from conventiona... View full abstract»

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  • Computer Interference Analysis

    Publication Year: 1973, Page(s):13 - 26
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (721 KB)

    This paper describes a single-server queuing model with Erlang input, which can be used for computer congestion analysis. The model is intended primarily for small computer systems in which the CPU is needed for input/output operations, which aggravates the interference problem. The model provides such information as the queuing time distribution for channel requests and the CPU delay due to chann... View full abstract»

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  • Optimum Storage Allocation for a File in Steady State

    Publication Year: 1973, Page(s):27 - 38
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (585 KB)

    A file of fixed-length records in auxiliary storage using a key-to-address transformation to assign records to addresses is considered. The file is assumed to be in steady state, that is that the rates of additions to and of deletions from the file are equal. The loading factors that minimize file maintenance costs in terms of storage space and additional accesses are computed for different bucket... View full abstract»

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  • Transport Properties of the Semiconductor Superlattice

    Publication Year: 1973, Page(s):39 - 46
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (504 KB)

    Precise calculations have been made, by Monte Carlo methods, of electron transport properties of the Esaki superlattice. The calculations were on a single-particle space-homogeneous basis, with a model of the superlattice which could be reasonably close to reality. Steady-state longitudinal drift-velocity/field characteristics were obtained, for four sets of parameter values; they exhibited the ex... View full abstract»

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  • Age-specific, Deterministic Model of Predator-Prey Populations: Application to Isle Royale

    Publication Year: 1973, Page(s):47 - 53
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (549 KB)

    A deterministic model is proposed for the description of predator-prey systems in which the prey has an age-specific vulnerability to predation. The model is developed on the basis of observations of the moose and wolf populations of Isle Royale, Michigan. The moose are divided into three groups, the very young, the adults, and the very old or sick. The three groups have different vulnerability to... View full abstract»

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  • Digital-to-analog Converter having Common-mode Isolation and Differential Output

    Publication Year: 1973, Page(s):54 - 60
    Cited by:  Papers (3)  |  Patents (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (493 KB)

    A digital-to-analog converter (DAC) is described that has transformer-coupled isolation for both power and data inputs and provides a true differential output. The DAC provides a 10-bit, 10.23-V unipolar output of either polarity, depending on which of the two output lines is used as the load reference potential. The common-mode potential may be as large as 250 V, and below 120 Hz the common-mode ... View full abstract»

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  • An AlN Switchable Memory Resistor Capable of a 20-MHz Cycling Rate and 500-picosecond Switching Time

    Publication Year: 1973, Page(s):61 - 65
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (394 KB)

    We report here the operational characteristics of multistable resistance switching devices made from thin sputtered layers of AlN. These devices exhibit switching between high and low resistance states when proper electrical signals are applied. Repetitive switching at 20-MHz rates has been achieved, and switching times in the best units have been observed to be less than 500 picoseconds. These ar... View full abstract»

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  • Amorphous Metallic Films for Bubble Domain Applications

    Publication Year: 1973, Page(s):66 - 68
    Cited by:  Papers (52)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (670 KB)

    We have found that sputtered amorphous films of Gd-Co and Gd-Fe have perpendicular magnetic anisotropy. The demagnetized domain configuration consists of stripe domains, and bubble domains were nucleated in an applied field. By controlling the sputtering conditions, films with a wide variety of magnetic properties were obtained. View full abstract»

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  • APLGOL, an Experimental Structured Programming Language

    Publication Year: 1973, Page(s):69 - 73
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (427 KB)

    An experimental programming language called APLGOL adds structured programming facilities to the existing framework of APL. The conventional semantics of APL is unaltered and only minor changes are incorporated in the syntax. The advantages of the proposed interstatement structuring and control are outlined. View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1973, Page(s):74 - 76
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (362 KB)

    Reprints of the papers listed here can usually be obtained by writing directly to the authors. The authors' IBM divisions are identified as follows: ASDD is the Advanced Systems Development Division; DPD, Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; GPD, General Products Division; GSD, General Systems Division; OPD, Ofice Products Division; RES, Researc... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1973, Page(s):77 - 79
    IEEE is not the copyright holder of this material | PDF file iconPDF (304 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1973, Page(s):80 - 84
    IEEE is not the copyright holder of this material | PDF file iconPDF (275 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1973, Page(s):84 - 85
    IEEE is not the copyright holder of this material | PDF file iconPDF (230 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