By Topic

IBM Journal of Research and Development

Issue 4 • Date July 1984

Filter Results

Displaying Results 1 - 15 of 15
  • Statistical failure analysis of system timing

    Publication Year: 1984 , Page(s): 340 - 355
    Cited by:  Papers (13)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2242 KB)  

    Techniques are developed that quantify the probability that large computer systems will meet their cycle time objectives. Both approximation techniques and rigorous multivariate statistical techniques are described. A method is developed that enumerates the cycle-limiting paths so that these approaches can be utilized. The results of these techniques enable system designers to ensure that performa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measures of ideal execution architectures

    Publication Year: 1984 , Page(s): 356 - 369
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1335 KB)  

    This paper is a study in ideal computer architectures or program representations. We define measures of “ideal” architectures that are related to the higher-level representation used to describe a program at the source language level. Traditional machine architectures name operations and objects which are presumed to be present in the host machine: a memory space of certain size, ALU... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design considerations of a static LSSD polarity hold latch pair

    Publication Year: 1984 , Page(s): 370 - 378
    Cited by:  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (772 KB)  

    There are many considerations relating to the design of a static LSSD polarity hold latch pair. High performance, low power dissipation, small size, and stability are some of the major requirements for a good design. The engineering trade-offs needed to ensure that all goals are met are discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • All points addressable raster display memory

    Publication Year: 1984 , Page(s): 379 - 392
    Cited by:  Papers (1)  |  Patents (13)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1319 KB)  

    This paper discusses display designs which store the image point by point in random access memory, so that independent update of every pixel is possible. A frequent bottleneck in the design of high performance displays of this type is the available bandwidth of the memory subsystem. In this paper, we focus on this issue and present features of a customized dynamic RAM chip which can readily provid... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A mapping and memory chip hardware which provides symmetric reading/writing of horizontal and vertical lines

    Publication Year: 1984 , Page(s): 393 - 398
    Cited by:  Papers (1)  |  Patents (6)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (496 KB)  

    This paper describes a mapping and memory chip hardware for enhancing the performance of an APA display. The approach describes a modification to the primary port of a quasi-two-ported memory. This modification allows several contiguous horizontal or vertical bits to be read or written in one cycle. The number of bits that can be stored is given by the number of memory chips. The hardware modifica... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reduction of random noise from multiband image data using phase relationships among their Fourier coefficients

    Publication Year: 1984 , Page(s): 399 - 411
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1426 KB)  

    The problem of reducing the random noise from multiband image data is examined, taking a nine-band image data set of a terrestrial scene and adding a significant amount of noise to the original pixel value of each band. For each of these data sets, data of three nearby bands generally exhibit a high correlation among them. Selected data for several sets of three nearby bands are transformed from t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Empty arrays in extended APL

    Publication Year: 1984 , Page(s): 412 - 427
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1274 KB)  

    During the past several years considerable work has been done on extending APL in three areas: operators, heterogeneous data, and nested data. In each area a proposed extension must treat empty arrays consistently. In this paper various possibilities for providing consistent behavior are presented. The new proposals possess at least one of two important qualities in which older proposals tend to b... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Software reliability analysis models

    Publication Year: 1984 , Page(s): 428 - 443
    Cited by:  Papers (123)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1535 KB)  

    This paper discusses improvements to conventional software reliability analysis models by making the assumptions on which they are based more realistic. In an actual project environment, sometimes no more information is available than reliability data obtained from a test report. The models described here are designed to resolve the problems caused by this constraint on the availability of reliabi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The digital data exchange—A space-division switching system

    Publication Year: 1984 , Page(s): 444 - 453
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1011 KB)  

    The user requirements for an automated switch for computer terminals in a large establishment or laboratory environment are discussed. This is followed by an explanation of the design requirements, and finally by a description of the significant features of the digital data exchange (DDEX), a microprocessor-controlled user-transparent space-division digital data switch of modular design which is c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Resist profile control in E-beam lithography

    Publication Year: 1984 , Page(s): 454 - 460
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (735 KB)  

    Imaging studies have confirmed that a desired resist profile can be obtained by selecting the appropriate combination of process parameters: dose, interrupted development, pattern bias, and resist thickness. Bias sensitivity of the resist image to process parameters was measured using a positive diazo resist with nonlinear development characteristics on an IBM EL-3 E-beam tool. Because of superior... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modeling of defects in integrated circuit photolithographic patterns

    Publication Year: 1984 , Page(s): 461 - 475
    Cited by:  Papers (135)  |  Patents (58)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1571 KB)  

    In a previous paper by the same author the foundation was laid for the theory of photolithographic defects in integrated circuits. This paper expands on the earlier one and shows how to calculate the critical areas and probability of failure for dense arrays of wiring. The results are used to determine the nature of the defect size distribution with electronic defect monitors. Several statistical ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Aspects of the traveling salesman problem

    Publication Year: 1984 , Page(s): 476 - 486
    Cited by:  Papers (15)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1040 KB)  

    For fifty years the traveling salesman problem has fascinated mathematicians, computer scientists, and laymen. It is easily stated, but hard to solve; it has become the prototypical hard problem in theoretical computer science. A large part of the extensive research conducted by IBM in the broad area of optimization, or mathematical programming, contributed to or was inspired by aspects of this ch... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent papers by IBM authors

    Publication Year: 1984 , Page(s): 487 - 493
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (606 KB)  

    Reprints of the papers listed here may usually be obtained by writing directly to the authors. The authors' IBM divisions or groups are identified as follows: CHQ is Corporate Headquarters; CPD, Communication Products Division; DSD, Data Systems Division; FED, Field Engineering Division; FSD, Federal Systems Division; GPD, General Products Division; GSD, General Systems Division; GTD, General Tech... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent IBM patents

    Publication Year: 1984 , Page(s): 494 - 497
    Save to Project icon | PDF file iconPDF (292 KB)  
    Freely Available from IEEE
  • Errata [Erratum]

    Publication Year: 1984 , Page(s): 498
    Save to Project icon | PDF file iconPDF (97 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.

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.

Full Aims & Scope

Meet Our Editors

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