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  • 1
    Electronic Resource
    Electronic Resource
    Soft x-ray pinhole imaging diagnostics for compact toroid plasmas : Eighth topical conference on high—temperature plasma diagnostics (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 2795-2797 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Soft x-ray pinhole imaging has recently become established as a valuable diagnostic for visualization of field reversed configuration (FRC) plasmas in the TRX-2, FRX-C/LSM devices. Gated MCP image converter devices with CsI cathodes and Be filters with a peak response around 11 nm wavelength are used for exposure durations ranging from a few tenths up to several microseconds. Results of experiments with single and Chevron channel plates are discussed along with estimates of linear exposure limitations with both film and CCD cameras as recording media. Plans for multiframe devices on the FRX-C/LSM and the LSX devices are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141834
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Poincaré maps define topography of Vlasov distribution functions consistent with stochastic dynamics (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 2963-2969 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In a recent paper [A. D. Bailey et al., Phys. Rev. Lett. 34, 3124 (1993)], the authors presented direct planar laser induced fluorescence measurements of the oscillatory ion fluid velocity field in the presence of a large amplitude drift-Alfven wave. Surprisingly, the measured speeds were an order of magnitude lower than predicted by standard fluid theory, yet the flow pattern was consistent with the fluid theory. A new model, based on the connection between stochasticity and bulk behavior, is presented which gives insights into the cause of this behavior. It is shown that when particle motion is stochastic, invariant sets of a ‘Poincaré map' define a flat-topped particle distribution function consistent with both the electromagnetic field driving the Vlasov equation and the fine-scale single particle dynamics. The approach is described for the general case and explored for a slab model of the observed drift wave. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871194
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Emissive probe current bias method of measuring dc vacuum potential (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 270-275 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: It is experimentally demonstrated that, with proper current bias, emissive probes can accurately measure dc electric potential in a vacuum. A comparison is made of the accuracy and time response of this "vacuum current bias'' method with two other emissive probe techniques, the inflection point in the limit of zero emission, and the floating potential of a strongly heated probe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140239
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    Paper (German National Licenses)
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  • 4
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    Discriminant Analysis as an Aid to Employee Selection: A Comment (1975)
    Menasha, Wis. : Periodicals Archive Online (PAO)
    The Accounting Review. 50:3 (1975:July) 588 
    Details
    ISSN: 0001-4826
    Topics: Economics
    Description / Table of Contents: CORRESPONDENCE
    Notes: Departments
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5030-1975-050-03-000017
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of removal of unattached cells on the bio-oxidation rate of pyrite in a fluidised bed reactor (1993)
    Springer
    Biotechnology letters 15 (1993), S. 543-548 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The relative significance of attached and unattached bacteria in bio-oxidation was assessed using a fluidised bed reactor. The unattached bacteria were removed from the system after different times in batch culture. Following wasout, the concentration of unattached bacteria recovered rapidly. This was ascribed to desorption of attached bacteria rather than growth of free, unattached bacteria. Throughout the cell depletion and repopulation phase, the rate of pyrite oxidation remained fairly constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00129334
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Factors affecting bio-oxidation of sulfide minerals at high concentrations of solids: A review (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 42 (1993), S. 1164-1174 
    Details
    ISSN: 0006-3592
    Keywords: bio-oxidation ; high solids concentration ; rate limitation ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Bio-oxidation has proved to be a viable process for the oxidative pretreatment of refractory gold-bearing sulfides. Generally, the oxidation rate is maximal at 20% solids for high sulfide content materials [ca. 30% sulfur]. Low grade ores [1% sulfur] have been successfully oxidized at 55% solids, indicating a link between the sulfide grade of the material and the optimal solids concentration for operation. Concentrations of high solids have been reported to lower oxidation rates, increase lag times, and decrease the ultimate extent of oxidation. This review discusses the various factors that have been proposed as causes of these phenomena. The factors include oxygen and carbon dioxide availability, low bacteria-solids ratio; mechanical damage or inhibition of the bacteria, inhibition of bacterial attachment, and the buildup of toxic leach products or other detrimental substances such as some flotation reagents. © 1993 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260421006
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    Paper (German National Licenses)
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