UK IT 1990 Conference

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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  • A knowledge based approach to FMS scheduling

    Publication Year: 1990, Page(s):24 - 31
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    Describes work done within the Software Technology Department of British Aerospace (Military Aircraft) Ltd. to investigate the application of IKBS to scheduling and planning problems. The basis of the work performed at UMIST was the automated acquisition of knowledge. The creation of a prototype FMS scheduler was selected as a basis for the study. The paper comments on the suitability of the probl... View full abstract»

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  • Definitive specification of concurrent systems

    Publication Year: 1990, Page(s):52 - 57
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    A new approach to the modelling and simulation of concurrent systems, characterised by the use of sets of definitions to represent states and transitions, is described. The simulation of system behaviour is derived from a specification of possible agent actions by taking account of relative speeds of response and operation. A distinctive feature of the approach is that the perceptions and capabili... 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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  • 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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  • The use of abstraction in automatic inference

    Publication Year: 1990, Page(s):365 - 370
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    Informally, abstraction can be described as the process of mapping a representation of a problem onto a new representation. Unfortunately, work on abstraction has on the whole remained at this informal level. The paper describes the beginnings of a theory of abstraction View full abstract»

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  • REPAIR: a model-based diagnosis system

    Publication Year: 1990, Page(s):266 - 270
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The work of the REPAIR project is described with particular emphasis on research into model-based diagnosis. The aim of the project was to investigate diagnostic reasoning processes in the context of physical mechanisms drawn from industry and engineering. This goal was pursued by building experimental software simulators that facilitate the modular construction of device models and allow the simu... 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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  • Fault diagnosis in embedded software

    Publication Year: 1990, Page(s):46 - 51
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    Examines and categorises the various failure mechanisms (e.g. queue overflow and resource lock-up) that are commonly experienced in typical embedded real-time systems. These failure mechanisms are listed together with the type of information that must be recorded in order to assist fault detection and rectification. The impact of this approach on the initial design of software is discussed, with a... 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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  • 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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  • 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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  • Integration of multi-layer perceptron and Markov models for automatic speech recognition

    Publication Year: 1990, Page(s):413 - 420
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    The paper presents the implementation of a new speech recognition system based on the integration of three semi-independent blocks: the acoustic processor (AP), which converts the speech signal into a set of robust acoustic features: the multi-layer perceptron (MLP) that maps the acoustic feature sequences to phonemes, discriminating the spectral variation from the real phonetic information; and t... View full abstract»

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  • A notation for real-time system specification

    Publication Year: 1990, Page(s):358 - 364
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    A new notation is required to cater for the specification of real-time systems. The familiarity of DFDs and their wide use in industry provides an incentive to extend the DFD notation rather than invent a completely new one for real-time system specification. The authors propose a notation based on data flow diagrams. The purpose of the diagram notation is to show clearly: all stored-data; all dat... View full abstract»

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  • The cognitive role of an engineer in a diagnostic task

    Publication Year: 1990, Page(s):259 - 263
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    A discussion is given on the provision of intelligent front ends to a suite of turbine vibration programs which are used by highly skilled engineers at CEGB. There is a brief account of the domain and the numerical simulations which model it. The authors then overview the expert system interface which was written to do a simple matching task and discuss some of its limitations when used by non-exp... View full abstract»

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  • The software death cycle

    Publication Year: 1990, Page(s):8 - 14
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (272 KB)

    Some aspects of software quality have been fairly well explored-particularly those that pertain to the development phase. Other aspects, notably the measurement of the cost of keeping operational software in line with customer requirements, have received considerably less attention. The paper explores this area by proposing a means of assessing the ownership cost of such software. It shows how thi... View full abstract»

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  • Design of a network security policy model

    Publication Year: 1990, Page(s):38 - 45
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    The paper considers the development of multilevel network security policy models by drawing as many parallels as possible from computer security models. It first considers how access control and information flow security issues arise in the design of multilevel secure network systems. It discusses these issues using typical scenarios, then develops an outline of a simple abstract network security ... View full abstract»

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  • The Ten15 project [software development]

    Publication Year: 1990, Page(s):306 - 310
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (408 KB)

    Describes the background and progress of the Ten15 project at RSRE. The emphasis centres on the potential advantages to the software engineering community of the widespread adoption of Ten15 as a kernel for software engineering applications. Ten15 provides an algebraic basis for software development. It has three important aspects: first, it provides an interface that makes different computers com... 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
    Cited by:  Papers (1)
    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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  • A control strategy for dry etch processing

    Publication Year: 1990, Page(s):387 - 389
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    The article describes a control strategy for a dry etching process. The basis for this control methodology is that a dry etching stage may be described by one or more response surfaces or parametric models in a multidimensional space. The process trajectory is defined in relation to response functions (parametric models) and is maintained by the use of adaptive control algorithms. The control fact... View full abstract»

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  • Knowledge representations and interfaces in financial expert systems

    Publication Year: 1990, Page(s):434 - 441
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The paper concerns itself with two related themes: explanation and knowledge reuse. They are treated in the context of the two ideas in the title, essential components of any knowledge-based system: interfaces and knowledge representation. The themes are related because they both require explicitness of knowledge; implicit knowledge makes for poor explanations, and restricts the potential for reus... View full abstract»

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  • A knowledge-based support environment for dynamic systems modelling

    Publication Year: 1990, Page(s):325 - 332
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB)

    The Knowledge-based Environment for Modelling and Simulation (KEMS) was developed as a result of a study done at the Control Engineering Department to find an ideal simulation language for simulating large systems. The paper describes the design and implementation of a prototype KEMS. Progress is also reported on current attempts to design simulation and database interfaces which will provide addi... View full abstract»

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  • High-speed bipolar technology

    Publication Year: 1990, Page(s):190 - 195
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    Developments in silicon bipolar and GaAlAs/GaAs heterojunction bipolar technologies are reviewed and the performance of the two technologies for high-speed ECL circuits are compared. The gate delays for state-of-the-art circuits are estimated using an analytical equation, which expresses the gate delay as a linear weighted sum of all the time constants in the circuit. A common idealised transistor... View full abstract»

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  • Speech synthesis in a computer aided learning environment

    Publication Year: 1990, Page(s):294 - 298
    Cited by:  Patents (37)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    CAL is not realising its true potential in spite of the powerful facilities that can be provided with microcomputers. One way of greatly improving the appeal of CAL is to incorporate speech into the human-computer interface. This would enable a CAL workstation to emulate the teacher-pupil relationship much more closely. The logical way to provide speech is by means of text-to-speech synthesis in v... View full abstract»

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