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IBM Journal of Research and Development

Issue 4 • Date July 1977

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Displaying Results 1 - 13 of 13
  • Two-Dimensional Analysis of High-Voltage Power Transistors

    Publication Year: 1977, Page(s):306 - 314
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (723 KB)

    The internal behavior of a typical n-p-n-n+ high-voltage power transistor is presented for several specific steady-state operating conditions obtained from a two-dimensional mathematical model. Internal self-heating and avalanche multiplication effects are taken into account. Poisson's equation, electron and hole continuity equations, and the heat flow equation are so... View full abstract»

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  • Splatter During Ink Jet Printing

    Publication Year: 1977, Page(s):315 - 320
    Cited by:  Papers (1)  |  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (542 KB)

    When an ink drop traveling at relatively high velocity impinges on a flat surface such as paper, part of the drop breaks up into many very small droplets that are deposited at other points. If these droplets are relatively large, then visible splatter results. Various parameters (ink properties, drop velocity, drop volume, space between drops, etc.) are investigated to determine their effect upon ... View full abstract»

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  • AUTOPASS: An Automatic Programming System for Computer Controlled Mechanical Assembly

    Publication Year: 1977, Page(s):321 - 333
    Cited by:  Papers (78)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1110 KB)

    This paper describes an experimental very high level programming system for computer controlled mechanical assembly, AUTOPASS (AUTOmated Parts ASsembly System). The AUTOPASS language is oriented towards objects and assembly operations, rather than motions of mechanical assembly machines. It is intended to enable the user to concentrate on the overall assembly sequence and to program with English-l... View full abstract»

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  • Linear Filtering Technique for Computing Mersenne and Fermat Number Transforms

    Publication Year: 1977, Page(s):334 - 339
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (435 KB)

    In this paper, the implementation of pseudo-Mersenne and Fermat Number Transforms is discussed. It is shown that some pseudo-Mersenne Transforms can be computed efficiently by a linear filtering approach. This approach is extended to cover the case of Fermat and pseudo-Fermat Number Transforms by using a special coding scheme for implementing arithmetic operations in a Fermat number system. View full abstract»

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  • Worst-Case Pattern Evaluation of Baseband Channels

    Publication Year: 1977, Page(s):340 - 349
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (541 KB)

    This paper presents a new method for evaluating the performance of communication systems that use binary-valued signaling formats. This technique permits selection of the best overall code for a particular channel or, alternatively, provides a method for comparing different channels that use the same transmission code. Encoded waveforms at the channel input are presumed to be generated by a constr... View full abstract»

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  • Algorithmic Information Theory

    Publication Year: 1977, Page(s):350 - 359
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    This paper reviews algorithmic information theory, which is an attempt to apply information-theoretic and probabilistic ideas to recursive function theory. Typical concerns in this approach are, for example, the number of bits of information required to specify an algorithm, or the probability that a program whose bits are chosen by coin flipping produces a given output. During the past few years ... View full abstract»

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  • Heuristic Design Algorithm for Computer Communication Networks with Different Classes of Packets

    Publication Year: 1977, Page(s):360 - 369
    Cited by:  Papers (5)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (565 KB)

    A typical operating environment of a packet switching (store-and-forward) computer communication network is that it is shared by many users with different classes of packets. Packets may be classified in a very general fashion by types of users, messages, applications, transactions, response time requirements, packet parameters such as packet rate and length, and by network parameters such as sour... View full abstract»

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  • Queuing Networks with Population Size Constraints

    Publication Year: 1977, Page(s):370 - 378
    Cited by:  Papers (34)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (540 KB)

    The class of queuing networks with multiple routing subchains is extended to include mechanisms of state-dependent lost arrivals and triggered arrivals. A sufficient condition is found, involving the loss and trigger functions, for the equilibrium network state probability distribution to have the product form; the known class of queuing networks with a product form solution is thus enlarged. Such... View full abstract»

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  • Experiments on the Dynamic Response of a Flexible Strip to Moving Loads

    Publication Year: 1977, Page(s):379 - 383
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    Experimental findings are reported on the dynamic response of a flexible strip to moving loads traveling at an oblique angle to its edges. The strip is wrapped under tension around a pair of supporting pressurized cylinder halves. The moving loads are applied to the flexible strip at the gap between the two cylinder halves. A capacitance displacement transducer measures the dynamic response of the... View full abstract»

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  • An Extension of Moore's Result for Closed Queuing Networks

    Publication Year: 1977, Page(s):384 - 387
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (370 KB)

    In this communication, Moore's result for the normalization constant of a closed queuing network of exponential servers is extended to the case of nondistinct traffic intensities. We then show that this result can be applied to various more general closed and semiclosed queuing networks with a product-form solution. View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1977, Page(s):388 - 394
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (389 KB)

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

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  • Recent IBM Patents

    Publication Year: 1977, Page(s):395 - 397
    IEEE is not the copyright holder of this material | PDF file iconPDF (230 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1977, Page(s):398 - 400
    IEEE is not the copyright holder of this material | PDF file iconPDF (266 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