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IBM Journal of Research and Development

Issue 3 • May 1973

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Displaying Results 1 - 13 of 13
  • Comparison of Two Methods of Modeling Stationary EEG Signals

    Publication Year: 1973, Page(s):194 - 205
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (625 KB)

    This paper compares the performances—when applied to stationary EEG signals—of two methods of modeling stochastic time-series; viz, a maximum-likelihood search method for a mixed autoregressive and moving-average time-series, and the well-known method of least-squares identification of a prefiltered autoregressive series. Computing effort per step is derived for different-order searc... View full abstract»

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  • X-ray Image Subtraction by Digital Means

    Publication Year: 1973, Page(s):206 - 218
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (968 KB)

    A conventional method of removing unwanted background information from radiographic images is to use photographic techniques. An alternative approach is the digital processing of x-ray difference images. This approach offers the advantage over photographic methods in that it permits the performance of nonlinear operations, such as compensation for film characteristics, thus offering greater flexib... View full abstract»

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  • Action Potential of the Motorneuron

    Publication Year: 1973, Page(s):219 - 229
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (653 KB)

    The excitability of various regions of the spinal motorneuron can be specified by solving the partial differential equation of a nerve fiber whose diameter and membrane properties vary with distance. For our model geometrical factors for the myelinated axon, initial segment and cell body were derived from anatomical measurements, the dendritic tree was represented by its equivalent cylinder, and t... View full abstract»

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  • Identifying and Understanding Patterns and Processes in Human Shock and Trauma

    Publication Year: 1973, Page(s):230 - 240
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (764 KB)

    The aim of this paper is to provide an overview of an on-going collaborative effort of research physicians, computer scientists, and statisticians to develop a quantitative way of understanding the clinical course of a critically ill and injured patient. The method is based on a multivariable analysis of time series of individual physiologic measurements. The ultimate goal is to reduce a large bod... View full abstract»

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  • Performance of Very High Density Charge Coupled Devices

    Publication Year: 1973, Page(s):241 - 248
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (566 KB)

    The results of an experimental study of the performance of very high density 8, 128, and 256 bit CCD shift register structures are presented. The primary topics discussed include transfer efficiency, frequency response, impact of “fat zero” operation, and observed temperature dependency. View full abstract»

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  • Theory and Computer-aided Analysis of Lossless Transmission Lines

    Publication Year: 1973, Page(s):249 - 255
    Cited by:  Papers (40)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (463 KB)

    A theoretical analysis of coupled and uncoupled lossless transmission lines is presented. A new method for deriving the conductance matrix G is described. Networks containing such lines have been simulated in the time domain and some results obtained from simulation of two example networks are given. View full abstract»

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  • Refractive Index Dispersion in Semiconductor-related Thin Films

    Publication Year: 1973, Page(s):256 - 262
    Cited by:  Papers (2)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB)

    A technique is described for determining refractive index dispersion throughout the uv-visible spectrum in semiconductor-related transparent thin films. The dispersion constants that have been measured can be used in the design of optical systems and in photolithography. Measurements were made with the LASER-VAMFO interferometer. Calculations and analyses are also described which show the accuracy... View full abstract»

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  • Experimental Study of Deadline Scheduling for Interactive Systems

    Publication Year: 1973, Page(s):263 - 269
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (406 KB)

    This paper outlines a resource allocation strategy called deadline scheduling, which is intended for use in interactive systems. Experiments are reported in which simplified versions of deadline scheduling and two time slicing strategies are modeled and compared under identical conditions. Results suggest that deadline scheduling, primarily by reducing paging overhead, provides faster response and... View full abstract»

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  • Asymptotic Expansion for Small Magnetic Fields of Acoustoelectric Attenuation in Nondegenerate Semiconductors

    Publication Year: 1973, Page(s):270 - 272
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    The semiclassical analysis of acoustoelectric effects involves an infinite sum S(c,x) = ic exp (−x) ∑n=−∞=∞ (n + ic)−1In(x), in which both arguments c and x depend on the magnetic field B. Recently Lebwohl, Carlson, and Mosekilde have found an integral representation for this sum, through which now we identify S(... View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1973, Page(s):273 - 277
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (382 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: 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):278 - 279
    IEEE is not the copyright holder of this material | PDF file iconPDF (260 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1973, Page(s):280 - 282
    IEEE is not the copyright holder of this material | PDF file iconPDF (281 KB)
    Freely Available from IEEE
  • Contents of previous issues

    Publication Year: 1973, Page(s):283 - 285
    IEEE is not the copyright holder of this material | PDF file iconPDF (236 KB)
    Freely Available from IEEE

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Clifford A. Pickover
IBM T. J. Watson Research Center