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IBM Journal of Research and Development

Issue 5 • Date Sept. 1978

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Displaying Results 1 - 17 of 17
  • Preface

    Publication Year: 1978, Page(s):442 - 443
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (170 KB)

    IBM has long recognized the importance and usefulness of pursuing advanced technology projects in fields of basic importance to the foundations of our business. Originally this referred mainly to the fields of engineering and the physics of materials from which our machines were built. In 1964 with the initial formation of the IBM Scientific Centers it was formally recognized that systems research... View full abstract»

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  • Principal Components of a Multispectral Image: Application to a Geological Problem

    Publication Year: 1978, Page(s):444 - 454
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1153 KB)

    The principal components of a multispectral image are studied with special emphasis placed on photointerpretation applications. The method used to obtain these components involves a linear radiometric enhancement which avoids artifact creation and does not require extra computational work. The results have been particularized to Landsat multispectral scanner images and applied to the geological st... View full abstract»

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  • Machine Processing of Remotely Sensed Data: Three Applications in Mexico

    Publication Year: 1978, Page(s):455 - 463
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (727 KB)

    In general, ground-data acquisition procedures in developing countries are not very efficient, and the resulting lack of reliable data produces significant delays in important management-planning decisions. This paper describes three studies involving different applications of machine processing of remotely sensed data, a recent technology that appears to have potential use for timely ground-infor... View full abstract»

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  • Using a Desk-Top Computer for an On-Line Flood Warning System

    Publication Year: 1978, Page(s):464 - 471
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (640 KB)

    The paper deals with the development of an adaptive model that is applicable to real-time forecasting of hydrologic processes. The rainfall-runoff process is considered here. In this model the discharge was modeled as autoregressive with past discharges and a moving average representation on the precipitation. The model makes use of the Constrained Linear Systems (CLS) technique to split the preci... View full abstract»

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  • Hydrodynamic Numeric Modeling of the Lagoon of Venice

    Publication Year: 1978, Page(s):472 - 480
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (742 KB)

    This paper describes two hydrodynamic numeric models and their application to the Lagoon of Venice, Italy. The models are based on the same mesh, bottom topography, boundary conditions, and spatial distribution of the bottom friction coefficient (Chézy coefficient). Although quite different in structure, both models ultimately provide sea level fluctuation and current speed at each meshpoin... View full abstract»

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  • Extrapolation of Seismic Waveforms by Fourier Methods

    Publication Year: 1978, Page(s):481 - 486
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (543 KB)

    The problem of constructing a cross section of reflectivity from the wave field recorded at the surface of the medium is discussed with particular reference to migration of seismic records. The numerical procedures are formulated in the frequency and wavenumber domain. The operations are defined in a fixed coordinate system, whereas finite difference methods require a downward-moving reference fra... View full abstract»

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  • A Directed Weather Data Filter

    Publication Year: 1978, Page(s):487 - 497
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (843 KB)

    It is important to reduce the computational burden of energy-analysis computer programs (such as those that compute expected heating and cooling loads and the energy required to meet these loads) since the input may include, for example, hourly measurements of several weather variables over periods of time of up to ten years. It is possible to generate a small set of weather data to represent a la... View full abstract»

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  • An Analytic Model of the VM/370 System

    Publication Year: 1978, Page(s):498 - 508
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (790 KB)

    This paper describes an analytic model of an interactive multiprogrammed computer system. The model accepts a multiple-user-class, transaction-oriented workload description and a system configuration description, and it produces predictions of resource utilizations, transaction rates, and average transaction response times. The solution method involves nearly complete decomposition, with a closed ... View full abstract»

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  • Algorithm and Hardware for a Merge Sort Using Multiple Processors

    Publication Year: 1978, Page(s):509 - 517
    Cited by:  Papers (8)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (654 KB)

    An algorithm is described that allows log(n) processors to sort n records in just over 2n write cycles, together with suitable hardware to support the algorithm. The algorithm is a parallel version of the straight merge sort. The passes of the merge sort are run overlapped, with each pass supported by a separate processor. The intermediate files of a serial merge sort are replaced by first-in firs... View full abstract»

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  • Computer-Aided Diagnosis with an Application to Endocrinology

    Publication Year: 1978, Page(s):518 - 532
    Cited by:  Patents (37)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1028 KB)

    An interactive system for computer-assisted medical diagnosis is described. Medical experts are provided with a framework in which to translate the knowledge on which their decisions are based. The technique is based on simulating the physician's own diagnostic process. The approach taken allows consistency and completeness checks to be made, thereby achieving a high degree of reliability. Informa... View full abstract»

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  • Noun-Phrase Model and Natural Query Language

    Publication Year: 1978, Page(s):533 - 540
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (657 KB)

    Basic considerations in designing a natural data base query language system are discussed. The notion of the noun-phrase data model is elaborated, and its role in making a query system suitable for general use is stressed. An experimental query system, Yachimata, embodying the concept, is described. View full abstract»

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  • AQL: A Problem-solving Query Language for Relational Data Bases

    Publication Year: 1978, Page(s):541 - 559
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1240 KB)

    AQL is a query language based on a data base management system which uses Codd's relational model of data. It has been designed mainly to be used by the nonspecialist in data processing for interactive problem solving, application building, and simulation. Ease of use is achieved by providing an interface which allows the use of default options, synonyms, and definitions of attributes, inference, ... View full abstract»

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  • Interpretation of Natural Language in an Information System

    Publication Year: 1978, Page(s):560 - 572
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1089 KB)

    This paper discusses some of the linguistic problems encountered during the development of the User Specialty Languages (USL) system, an information system that accepts a subset of German or English as input for query, analysis, and updating of data. The system is regarded as a model for portions of natural language that are relevant to interactions with a data base. The model provides insight int... View full abstract»

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  • IBM Scientific Centers

    Publication Year: 1978, Page(s):573 - 575
    IEEE is not the copyright holder of this material | PDF file iconPDF (240 KB)
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  • Recent Papers by IBM Authors

    Publication Year: 1978, Page(s):576 - 580
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (378 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, Office Products Division; RES, Research Division; SCD, System Communications Divis... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1978, Page(s):581 - 583
    IEEE is not the copyright holder of this material | PDF file iconPDF (217 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1978, Page(s):584 - 586
    IEEE is not the copyright holder of this material | PDF file iconPDF (298 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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Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center