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[1993] Proceedings of the IEEE Workshop on Real-Time Applications

13-14 May 1993

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Displaying Results 1 - 25 of 44
  • Proceedings of the IEEE Workshop on Real-Time Applications (Cat.No.93TH0559-5)

    Publication Year: 1993
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    Freely Available from IEEE
  • Research issues for executing real-time C3 applications on parallel processing systems

    Publication Year: 1993, Page(s):81 - 86
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Current trends indicate that future C3 (command, control, and communications) systems will likely contain suites of heterogeneous computing facilities composed of both parallel and sequential computing components. Also, `commercial-off-the-shelf' components are being heavily considered for use in these future systems. In the context of these trends, brief overviews of related work within the areas... View full abstract»

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  • Resource sharing of real-time applications with other applications

    Publication Year: 1993, Page(s):87 - 91
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Most real-time applications run on dedicated system, to eliminate the uncertainty that may arise if other applications are running on the system. The resource requirement for the real-time application is determined on the basis of the system's ability to provide fault tolerance under the worst case execution time assumption. Costs of such systems will be better justified, if the real-time applicat... View full abstract»

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  • Software reengineering in a C3I domain

    Publication Year: 1993, Page(s):148 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The authors present a strategy for software reengineering of applications in the Command, Control, Communications, and Intelligence (C3I) domain with focus on the inherent real-time response requirements. The reengineering strategy is presented within the context of a typical DoD-STD-2167A software development life cycle. They define a methodology for software reuse, language translatio... View full abstract»

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  • Rate-monotonic analysis of an advanced field artillery data system

    Publication Year: 1993, Page(s):92 - 96
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The Advanced Field Artillery Tactical Data System (AFATDS) is a multiserver automated command and control system for fire support operations. The authors applied rate-monotonic analysis to Version 1 of the software. They developed two models. The first model focuses exclusively on application-level tasks; the second model considers effects of the UNIX run-time system. Analysis of these models give... View full abstract»

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  • Design of embedded hard real-time applications with predictable behaviour

    Publication Year: 1993, Page(s):193 - 197
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    In contrast to most of the other studies which only consider selected topic(s) and typically deal with issues of higher levels of design, the research project outlined uses a holistic approach to real-time application design issues. It is set up in layers starting with a predictably behaving computer hardware architecture, followed by an appropriate programming language and, finally, a tool for au... View full abstract»

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  • A real-time image filtration system

    Publication Year: 1993, Page(s):153 - 154
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    A system for performing highly parallel, predictable real-time image filtration is described. The application software was developed using a special class of abstract data types (ADT) constructed in the RT-X language which has predictable execution times. The filtration algorithm is based on a Universal Image Algebra. Additional image processing applications such as feature extraction via edge det... View full abstract»

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  • Towards a multilevel secure database management system for real-time applications

    Publication Year: 1993, Page(s):131 - 135
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Database systems for real-time applications must satisfy timing constraints associated with transactions, in addition to maintaining data consistency. In addition to real-time requirements, security is usually required in many applications, because sensitive information must be safeguarded. Multilevel security requirements introduce a new dimension to transaction processing in real-time database s... View full abstract»

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  • The design of real-time applications

    Publication Year: 1993, Page(s):178 - 182
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Complex real-time applications require a disciplined approach at the design stage. Unfortunately, existing design methods are not wholly appropriate for use with real-time applications. Even methods that have been developed specifically for this purpose fail to result in provably correct designs that are easily understood. Seven essential criteria of a suitable design method are given, and one pot... View full abstract»

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  • Probabilistic job scheduling for distributed real-time applications

    Publication Year: 1993, Page(s):97 - 101
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The authors describe a heuristic for dynamically scheduling time-constrained tasks in a distributed environment. When a task is submitted to a node, the scheduling software tries to schedule the task locally so as to meet its deadline. If that is not feasible, it tries to locate another node where this could be done with a high probability of success. Nodes in the system inform each other about th... View full abstract»

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  • Software architecture in realtime systems

    Publication Year: 1993, Page(s):198 - 203
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Software architecture is receiving attention as engineers search for high leverage representations and tools for system design and analysis. The author's approach to software architecture addresses both system structure and communication behavior from four different views: conceptual, module, code and execution. A system is described within a view using domain-specific components and connectors. C... View full abstract»

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  • Real-time data acquisition in high-energy physics experiments

    Publication Year: 1993, Page(s):112 - 115
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Gives an overview of the field of real-time data acquisition in high-energy physics experiments. It presents the problems encountered in real-time data acquisition and describes current solutions to some of them. It is intended as a tutorial introduction, having the main purpose to educate non-physicists about the challenges met by the designers of computer systems for supercolliders, the largest ... View full abstract»

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  • Ada dynamic load control mechanisms for distributed embedded battle management systems

    Publication Year: 1993, Page(s):156 - 160
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The paper presents dynamic load control constructs that provide Ada with overload detection and load reconfiguration mechanisms. This approach to dynamic resource control allows adaptation of application parameters based on the current load conditions. This capability allows for more complex resource control policies that utilize information about the actual application being performed. A set of e... View full abstract»

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  • Temporal properties of the timed d-graphs of distributed processes

    Publication Year: 1993, Page(s):136 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Some concepts and tools used to verify the time boundaries of sequential software for hard-real-time applications are based on program control flow and the execution time of instructions or blocks. The paper extends a structural approach from sequential to distributed software. It is conceptually and practically based on timed Concurrent Graphs, TCGs, which extend the concept of sequential program... View full abstract»

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  • Network Services Database-a distributed active real-time database (DARTDB) application

    Publication Year: 1993, Page(s):184 - 187
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A methodical study of real-time database applications can help identify the important research issues in real-time databases. The authors discuss the data and transaction characteristics of a telephone network services database in an attempt to study real-time database issues in the context of an application and to identify new research issues. Network services databases are soft/firm real-time sy... View full abstract»

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  • An adaptive noise cancelling system used for beam control at the Stanford Linear Accelerator Center

    Publication Year: 1993, Page(s):212 - 215
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The SLAC Linear Collider now has a total of twenty-four beam-steering feedback loops used to keep the electron and positron beams on their desired trajectories. Seven of these loops measure and control the same beam as it proceeds down the linac through the arcs to the final focus. Ideally each loop should correct only for disturbances that occur between it and the immediate upstream loop. In fact... View full abstract»

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  • Resource scheduling for adaptive systems

    Publication Year: 1993, Page(s):102 - 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    The author discusses the characteristics of the real-time scheduling technology for adaptive applications that have shared physical resources View full abstract»

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  • A look at the current automated capabilities of traceability

    Publication Year: 1993, Page(s):204 - 206
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The development of large scale, real-time military systems requires the tracing of requirements as mandated by DOD-STD-2167A. In order to comply with this requirement it is necessary to use an automated traceability tool. The paper examines the process and criteria for evaluating traceability tools for use with real-time system developments View full abstract»

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  • Reusable component retrieval for real-time applications

    Publication Year: 1993, Page(s):116 - 120
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The growth of reuse and the advent of software repositories has led to the design of mechanisms to retrieve reusable assets. The most popular retrieval mechanisms, namely browsers, keyword searches, and multi-attribute searches offer limited precision in large domains or across domains. The use of formal algebraic specifications as search keys for reusable components leads to increased precision a... View full abstract»

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  • Real-time issues in the design of the Data Management System for the Space Station Freedom

    Publication Year: 1993, Page(s):161 - 165
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Space Station Freedom (SSF) faces several challenges which are unique in the NASA history of manned and unmanned spacecraft systems. The challenges include a 30 year life, and evolution in capability of the station as a science platform and potentially a transportation node for manned missions to the solar system. The Data Management System (DMS) is a key element of SSF. DMS is the computational i... View full abstract»

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  • The design of a real-time system for simulators and trainers

    Publication Year: 1993, Page(s):18 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The author describes the design of a host/target multiprocessor system with distributed memory, which addresses a class of real-time problems that operate in a synchronized environment with rapid response to external events, such as real-time simulators and trainers. The unique needs of trainers and simulators are addressed through the implementation of a mirror memory and a distributed database s... View full abstract»

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  • Implications of fault management and replica determinism on the real-time execution scheme of VOTRICS

    Publication Year: 1993, Page(s):39 - 43
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The fault tolerant architecture VOTRICS focuses on the use of n-modular active replication of hardware. Hardware and link failures are detected by voting mechanisms realized in software. The use of active replication and the mechanisms for activities such as fault management, recovery, or keeping correct replicas synchronized (even in the presence of faults) have influences on the chosen system mo... View full abstract»

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  • An extended imprecise computation model for time-constrained speech processing and generation

    Publication Year: 1993, Page(s):76 - 80
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors describe a real-time speech application which simulates the human production of natural-language utterances in a two-person conversation. Since generating such utterances is a complex and often time-consuming task, they examine the timing constraints and result-quality requirements of this application, as well as the dependencies between the timing constraints and result qualities of t... View full abstract»

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  • Real-time environment modeling

    Publication Year: 1993, Page(s):142 - 146
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Much has been made of recent advances in software development regarding software reusability as a means of making systems easier to develop and maintain and making (as the name implies) it possible to reuse significant portions in other related systems development, further reducing development and maintenance efforts. Real-time systems pose both unusual problems and unique opportunities in this ar... View full abstract»

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  • MX: a real-time fault and change-tolerant distributed system

    Publication Year: 1993, Page(s):188 - 192
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The paper describes the Media Exchange (MX) system, a generic distributed platform that supports specialized mission-critical applications for multi-media communications (voice, data, video, and telemetry). It describes the goals and strategies used to implement the platform and initial application set in the financial market domain, and discusses several areas for improvement. It concludes that t... View full abstract»

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