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  • 1
    Electronic Resource
    Electronic Resource
    Transparent data access in a multivendor, distributed data-acquisition and data processing system (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1774-1776 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Location-independent data access methods are being developed at Lawrence Livermore National Laboratory to manage and use data acquired by a multivendor distributed laboratory computer network. An interprocess communication system (IPCS) is used to connect tasks which produce, manage, or use experimental data. These tasks may run on any of the computers in the network. A central database and database server maintain supervisory records of experimental activity and locations of data produced by the experiment. Data may be located in several subsidiary local databases, file systems, or tape archives. Data access requests, if they cannot be satisfied locally, are routed via the IPCS to database servers, which locate and retrieve (or store) the requested data. We describe the design details and give examples of the current implementation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140108
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Integrated, multivendor distributed data-acquisition system (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1786-1788 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A distributed data-acquisition system that used various computer hardware and software is being developed to support magnetic fusion experiments at Lawrence Livermore National Laboratory (LLNL). The experimental sequence of operations is controlled by a supervisory program, which coordinates software running on Digital Equipment Corporation (DEC) VAX computers, Hewlett–Packard (HP) UNIX-based workstations, and HP basic desktop computers. An interprocess communication system (IPCS) allows programs to communicate with one another in a standard manner regardless of program location in the network or of operating system and hardware differences. We discuss the design and implementation of this data-acquisition system with particular emphasis on the coordination model and the IPCS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140112
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  • 3
    Electronic Resource
    Electronic Resource
    A fiber-optic probe for particle sizing in concentrated suspensions (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2963-2968 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A fiber-optic probe employing two monomode optical fibers, one for transmitting a Gaussian laser beam to the scattering volume and the second, positioned at some backscatter angle, for receiving the scattered light is described. Performance and suitability of the system for a process control environment is assessed by studying a suspension of polystyrene latex particles over a wide range of sizes and concentrations. The results show that the probe is ideal for a process control environment in industrial and laboratory applications. Particle size is recovered, without any additional corrections for multiple light scattering, in concentrations containing up to 10% solids of 39-nm polystyrene latex spheres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142190
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