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Date 19-22 March 1990

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Displaying Results 1 - 25 of 67
  • Using reservation-virtual-time-CSMA with split-channel reservation for packet voice and data

    Publication Year: 1990, Page(s):209 - 212
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (171 KB)

    The carrier sense multiple access with collision detection (CSMA/CD) protocol, originally developed for data transmission is not very effective for the transmission of voice packets due to excessive packet delays at moderate to high loads. It has been shown by C.T. Lea, J.S. Heditch (1987), that the problem of delays can be greatly reduced by using a variation of CSMA called reservation-virtual-ti... View full abstract»

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  • A shared-memory execution model for parallel functional programming

    Publication Year: 1990, Page(s):247 - 250
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (227 KB)

    Functional languages have received more interest recently and particularly for programming parallel computers. Traditionally, functional languages were developed simultaneously with the design of new architectures such as data flow and reduction machine. The authors present a general execution model to support a parallel functional language called SISAL (stream and iteration in a single assignment... View full abstract»

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  • Non-destructive layer thickness measurements of multi-layer silicon-on-insulator structures

    Publication Year: 1990, Page(s):403 - 406
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    Layer thickness information on gate and field oxides, buried insulators and epitaxial layers is becoming more critical as device dimensions are reduced and structure complexity increases. Spectroscopic ellipsometry (SE) has been used to measure oxide, epi- and poly-Si thicknesses at stages during processing on structures comprising poly-Si/oxide/SOS and oxide/poly-Si/oxide/bulk Si. The structures ... View full abstract»

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  • Performance improvements to the Hough transform

    Publication Year: 1990, Page(s):98 - 103
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    The paper describes a new algorithm for the Hough transform, the combinatorial Hough transform, an improvement to the Hough space accumulator which gives greater resolution for a fixed size, and a new method for detecting line end points using the transform. These are described separately and implemented together to give a new algorithm with improved resolution. Also a method for the performance a... View full abstract»

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  • Topsy: an extensible Unix multicomputer

    Publication Year: 1990, Page(s):164 - 176
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (940 KB)

    Topsy is a message passing multicomputer architecture. It comprises a distributed Unix-compatible kernel resting on a message software system which in turn relies on a new, high speed, communications hardware. The authors present an overview of the goals of the architecture and the main design decisions, a description of the structure and major components of the operating system and the communicat... View full abstract»

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  • An environment for specification, design, operation, maintenance, and revision of manufacturing control systems

    Publication Year: 1990, Page(s):104 - 110
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    The Engineering Design Research Centre has been set up by SERC at Glasgow University (in collaboration with Heriot-Watt and Strathclyde universities, Napier College and Paisley College) to conduct fundamental and strategic research into engineering design in all its aspects. As one aspect of this, a project sponsored jointly by the Engineering Design Research Centre and Eurotherm Ltd has been set ... View full abstract»

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  • The new programming model for parallel machines

    Publication Year: 1990, Page(s):177 - 183
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB)

    A new model to help write programs which run concurrently in parallel machines, is discussed. This model takes the well known model of inter-communicating processes and refines it by: identifying processes with the evaluation of a function and eliminating many of the difficulties resulting from identifying processes with procedural programs; invoking process execution in two phases, ie., in the fi... View full abstract»

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  • Four adaptive strategies for knowledge-based front-ends

    Publication Year: 1990, Page(s):371 - 378
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (512 KB)

    The paper presents four adaptive strategies for knowledge-based front-ends (KBFEs). These strategies aim to contour the behaviour of a front-end system by acquiring information about the user's abilities and knowledge. The prototype program incorporating these strategies, Telos, is an adaptive front-end for the NAg FORTRAN Library. This library is contain over 740 numerical and statistical subrout... View full abstract»

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  • A systolic parameter estimator for real-time adaptive control

    Publication Year: 1990, Page(s):111 - 116
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    Describes a new systolic parameter (or constant state) estimator based upon the square root covariance Kalman filter algorithm. Parameter estimation is a fundamental component of adaptive controllers and explicit self-tuning regulators. The new architecture is compared with one proposed by Shepherd, McWhirter, and Hudson (1988), and it is shown to be potentially more attractive for parallel contro... View full abstract»

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  • Initial experience in implementing multicast facilities in computer supported cooperative work

    Publication Year: 1990, Page(s):196 - 203
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    A description is given of a performance evaluation of multicast communication facilities designed earlier to support computer supported cooperative work (CSCW), (I. Greifetal., 1988). CSCW systems allow a group of individuals working together on a common pool of data as well as making common decisions. These systems often involve dynamic group communications amongst the users in a combination of s... View full abstract»

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  • Recognition of handwritten Arabic mathematical formulas

    Publication Year: 1990, Page(s):344 - 351
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    The author develops a hierarchical system for the recognition of on-line Arabic mathematical symbols. A precedence grammar has been also developed for the recognition of one-dimensional Arabic mathematical formulas. The segmentation of a mathematical formula is relatively simple since all characters are isolated and each consists of one stroke only, with the exception of three symbols where each c... View full abstract»

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  • Applying coupled resolution engines to knowledge bases

    Publication Year: 1990, Page(s):379 - 386
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    A software architecture has been developed that couples a concurrent logic programming or CLP engine with a multi-threaded Prolog engine. Concurrency among mutually invoking Prolog and CLP computations is sustained partly through and-parallel execution of CLP computations on the CLP engine, partly by executing multiple Prolog processes and a CLP engine under Unix on a multi-processor or a uni-proc... View full abstract»

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  • An approach to knowledge elicitation of manufacturing skills and production behaviour in an industrial environment

    Publication Year: 1990, Page(s):15 - 23
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    The application of expert systems (ES) in industry is an area in which achievements have not lived up to initial expectations. The authors' research at Sunderland Polytechnic is to address this situation and evaluate the relevance of recent ES developments and their approaches to an industrial domain. To this end they carried out the stages of building an expert system in a manufacturing domain. I... View full abstract»

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  • Real-time image analysis for vision guided vehicle control

    Publication Year: 1990, Page(s):66 - 70
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    Presents an overview of a three year investigation into vision guided road vehicle control conducted by a team at the University of Bristol. The goal was to develop a parallel computer architecture, based on the Inmos transputer, which is capable of real-time analysis of video images obtained from a camera mounted on the front of a vehicle. Much of the algorithm development is based on analysis of... View full abstract»

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  • Flexible parallel control

    Publication Year: 1990, Page(s):117 - 124
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (408 KB)

    The concept of a flexible parallel structure for feedback control is described and two implementation studies are investigated. The fundamental arrangement for such controllers is a novel way in which feedback control can be arranged, further it is seen to be modern in that it ties in with present-day technology, and exciting in terms of the potential application areas which can now be investigate... View full abstract»

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  • Acousto-optic correlation techniques

    Publication Year: 1990, Page(s):251 - 258
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    A description is given of the theory of operation of acousto-optic (AO) devices and correlators in general. Two different applications of twin Bragg cell space-integrating correlator/convolvers are then discussed. In the first a heterodyning technique is employed in which light at different optical frequencies is mixed to give the convolution of the signals applied to the two AO cells. The system ... View full abstract»

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  • Transputer-based networks for parallel distributed sensor systems

    Publication Year: 1990, Page(s):204 - 208
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    Two developing technologies that have become prominent in applied systems architectures are parallel processing and distributed networks. However, the integration of parallel computing devices within commercial and industrial networks is an emerging field with opportunities that have not been sufficiently exploited. One of the reasons for this lag can be found in the conventional thinking about th... View full abstract»

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  • Some applications of formal methods to the design of distributed knowledge base systems

    Publication Year: 1990, Page(s):133 - 138
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The paper describes a technique for formally defining the semantics of a knowledge base language-the Vienna development method (VDM). The technique is shown to have applications in query optimisation and in the maintenance of consistency of the knowledge. The paper suggests that the same approach can help in the development of translators between different knowledge models. It is also anticipated ... View full abstract»

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  • A self learning algorithm applied to object recognition

    Publication Year: 1990, Page(s):91 - 97
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    Describes the design of a low cost, binary image, vision system which fits into the slots of a standard personal computer (PC). Associated software for image processing and object recognition is also presented. Various techniques for object recognition are compared and contrasted with that of a self learning method View full abstract»

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  • WASP: a demonstrated wafer scale technology

    Publication Year: 1990, Page(s):184 - 189
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (320 KB)

    The authors review WASP 1 and discuss the WASP 2a and WASP 2b wafer scale integration (WSI) massively parallel processor technology demonstrators, implemented in standard CMOS technology. These latter devices are defect-tolerant arrays of 864 and 6480 processing elements and integrate 1.26 M transistors (4 cm×4 cm) and 8.43 M transistors (10 cm×10 cm). The two variants (WASP 2a and WAS... View full abstract»

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  • UK IT 1990 Conference (Conf. Publ. No.316)

    Publication Year: 1990
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (80 KB)

    The following topics were dealt with: software engineering; knowledge acquisition and development; security and fault tolerance; concurrency; computer vision; control systems and environments; formal modelling methods; system quality and metrics; parallel and distributed architecture; VLSI; experimental systems; formal aspects; system design; software tools; instrumentation and intelligence; IKBS;... View full abstract»

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  • Computational hyphenation

    Publication Year: 1990, Page(s):352 - 357
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    The paper presents an overview of the role of hyphenation in computational environment. The work is a summary of an existing application. An overview of the language independent system is presented and possible extensions suggested. The system is a multilingual hyphenation package which has been researched and developed at Linotype Limited for use in the graphical art/desktop publishing industry View full abstract»

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  • Aspects of knowledge base management system research at ECRC

    Publication Year: 1990, Page(s):271 - 278
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    The main objective of the knowledge bases group at ECRC, is to develop a fully comprehensive knowledge base management system. The authors concentrate on aspects of this work in which they are actively involved and essentially provide an overview of theoretical studies and software development which have recently been reported in detail in the literature. They give a brief assessment of the state-... View full abstract»

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  • Computer vision based automatic construction of 3-D geometry scene models

    Publication Year: 1990, Page(s):71 - 78
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    Describes an approach towards the automatic construction of 3-D object models using images of the scene. The method makes use of a visible surface scene representation called the 21/2 -D sketch. The implementation utilises multiple simulated 21 /2-D sketches to construct a 3-D voxel based geometric model. The depth information from each 21/... View full abstract»

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  • Implementation and evaluation of pattern classification architectures using transputer arrays

    Publication Year: 1990, Page(s):87 - 90
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    The paper focusses on the problem of transputer-based implementation of algorithms for pattern classification. Specifically, it shows that a very close relationship can be established between the conceptual level at which a classifier architecture is conceived and the physical level at which implementation is achieved, to the extent that novel conceptual structures can be evolved directly from a c... View full abstract»

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