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  • Articles: DFG German National Licenses  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    BIT 19 (1979), S. 135-137 
    ISSN: 1572-9125
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The visual computer 9 (1993), S. 356-370 
    ISSN: 1432-2315
    Keywords: Parallel programming ; Distributed-memory multicomputers ; Solid modelling ; Ray tracing ; Spatial subdivision ; Incremental updates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper describes the design and implementation of Mistral-3, a parallel solid odeller for distributed-memory multicomputers implementing algorithms for creating, ray tracing and incrementally updating octree-based spatial data structures. The system has been designed to be scalable and portable. Scalability is addressed by distributing the control of task and data management between all available processors and portability's solved by building software for the abstraction of a distributed-memory multicomputer. An object-oriented approach to the design is adopted to help produce a structured system. Results are presented showing Mistral-3 has made good use of up to 128 T800 transputers. It has been ported to transputer-and non-transputer-based multicomputers.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    BT technology journal 17 (1999), S. 78-90 
    ISSN: 1573-1995
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The principal asset of an enterprise is its workforce, and a key factor distinguishing the successful enterprise of the forthcoming millennium is the empowerment of its staff in pursuit of corporate goals. While the more routine tasks will become totally automated, there will also be an increased use of IT to amplify the abilities of knowledge workers as individuals and members of collaborative teams. These teams are likely to be much more volatile than at present, being convened for specific purposes and disbanding once the purpose is achieved. Individuals may simultaneously belong to several teams, and may play different roles in each of these. This view of the future poses challenging requirements of the supporting software infrastructure. Many support applications for virtual teams share similar fundamental requirements for core services, such as information management, co-ordination and collaborative working. This paper proposes an approach to construction of collaborative systems in which a model is used to describe user interaction with core services within an application context. This model then drives a run-time enactment service which provides integrated access to required services through appropriate user interfaces. This development approach enables flexible integration and customisation of core services for team members, and enhances the ability of the software to evolve over time as requirements change. An experimental model-based collaborative system was built according to this approach, and applied to a virtual team scenario based on a BT business process for provision of quotations for network services. Evaluation trials were encouraging and demonstrated both the feasibility and usability of the approach, particularly for participatory design of collaborative systems with end users.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 20 (1984), S. 1797-1813 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The simulation of a large-scale gas transmission network involves the numerical solution of a large system of initial valued, stiff algebraic/differential equations. Rapid changes in the solution are present due to the disturbances generated by the varying consumer demand and the operation of network controlling devices such as compressors. This paper discusses the design of an efficient variable-step integrator for the solution of the problem. Two sets of strategies are presented for implementing the variable-step integrator; one for the implicit numerical method such as the diagonally implicit Runge-Kutta methods, and the other for the linearly implicit Rosenbrock-type method. The performance of the numerical methods implemented are compared with the British Gas simulation program PAN on a number of large, realistic transmission networks.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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