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  • 1
    Electronic Resource
    Electronic Resource
    Thermal behavior and strength of continuous filament Cu-Nb composites (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 2212-2217 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Microfilamentary composites of continuous Nb fibers in Cu matrices prepared by the stack-and-draw method were tested for normal-state electrical conductivity, residual stress state, and tensile properties. Composite wires having nominal filament diameters of about 0.1 μm were characterized by elevated matrix annealing temperatures, large Nb residual strains, and high tensile strengths. In the fine-filament regime, finer wire sizes result in larger matrix resistivities, higher residual fiber strains, and higher tensile strengths with little effect on matrix annealing temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338928
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of strain on the critical-current density of Cu-Nb composites (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 2979-2982 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Microfilamentary superconducting composites of Nb fibers in Cu matrices prepared by the stack and draw method were tested for tensile critical-current performance at 4.2 K. The superconducting critical-current densities increased exponentially under the influence of an applied mechanical strain until the onset of Nb fiber plastic deformation. In the elastic range, the critical-current densities conformed to log10 Jc =m (strain)+b. In several tests the critical current was increased by more than an order of magnitude by the applied strain. This behavior is consistent with an increase in the upper critical field of the Nb fibers by the applied stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337847
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of heat treatment on the superconducting properties of Cu-Nb composites (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 930-934 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Microfilamentary composites of continuous Nb fibers in Cu matrices were tested for superconducting transport properties after heat treatments at 200–900 °C. The critical current density at applied magnetic field was reduced dramatically as the heat treatment temperature was increased. The scaling relations describing the critical current as a function of applied field shifted from conventional (1−h)2 scaling to higher-order relations as the heat treatment history was varied. Critical temperature transitions were abnormally broad in the fine-filament composites examined. The upper critical fields and transition temperatures approached bulk values after severe heat treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345727
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  • 4
    Electronic Resource
    Electronic Resource
    BVP models of nerve membrane (reply) (1982)
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 375-375 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] HINDMARSH AND ROSE REPLY - The novel feature we wished to draw attention to was not the positive gradient of the isocline y = 0 in the region x 〈 0, but rather the close proximity of the isoclines x = 0 and y = 0. This proximity is determined by zxp(00)" which is small according to both the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/299375b0
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative Structure–Activity Relationships and Volume Fraction Analysis for Nonpolar Narcotic Chemicals to the Australian Cladoceran Ceriodaphnia cf. dubia (1998)
    Springer
    Archives of environmental contamination and toxicology 34 (1998), S. 248-252 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. The toxicity of eleven nonpolar narcotic chemicals to the cladoceran Ceriodaphnia cf. dubia was determined. C. cf. dubia was found to be approximately four times more sensitive to these narcotic chemicals than Daphnia magna tested under virtually identical conditions. The toxicity data were also used to develop and validate quantitative structure–activity relationships (QSARs) using a range of physicochemical properties of the chemicals. The three best QSARs, based on octanol–water partition coefficients and two lipid–water partition coefficients, were able to explain 98% of the variation in toxicity. The mean absolute percentage errors between the predicted and experimental EC50 values for these three QSARs were 17.3%, 20.6%, 24.6%. Neither the critical concentration (CC) nor the critical volume (CV) hypotheses validly modeled the toxicity data when octanol–water and triolein–water partition coefficients were used although the CV hypothesis was the better of the two. When a phospholipid–water partition coefficient was used the CV hypothesis was valid. The mean toxic membrane volume fraction of 0.48 × 10−2 m3/m3 derived in this study agreed with published values for nonpolar narcotics and supports the use of this property to determine the mode of action of chemicals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449900313
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  • 6
    Electronic Resource
    Electronic Resource
    Uptake of Pneumocystis carinii mediated by the macrophage mannose receptor (1991)
    [s.l.] : Nature Publishing Group
    Nature 351 (1991), S. 155-158 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 a, An electron micrograph of rat alveolar macrophage that has ingested a typical thick-walled cyst form of P. carinii, b, f, Reduction of nitroblue tetrazolium, a histochemical dye that measures superoxide release, is triggered around label-led (b) and unlabelled (f) P. carinii after ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/351155a0
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  • 7
    Electronic Resource
    Electronic Resource
    A model of the nerve impulse using two first-order differential equations (1982)
    [s.l.] : Nature Publishing Group
    Nature 296 (1982), S. 162-164 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although our model may be seen as a generalization of the Fitzhugh equations2, it can be developed from first principles if it is assumed that the rate of change of membrane potential depends linearly on z (the current passed through the electrode), and y (an intrinsic current), and depends ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/296162a0
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  • 8
    Electronic Resource
    Electronic Resource
    Diffusion in the CuSn binary system: application to Nb3Sn composites (1984)
    Springer
    Journal of materials science 19 (1984), S. 497-500 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Non-parabolic growth of intermediate phases in CuSn binary diffusion couples has been observed at 220° C. The deviation from parabolic behaviour may be attributed to grain boundary diffusion. Diffusion coefficients for both the∈-(Cu3Sn) andη-(Cu6Sn5) phases are typically of the order of 2×10−11 cm2 sec−1, and are in general agreement with other published values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403236
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  • 9
    Electronic Resource
    Electronic Resource
    Crack detection in conducting materials using SQUID magnetometry (1993)
    Springer
    Journal of nondestructive evaluation 12 (1993), S. 199-207 
    Details
    ISSN: 1573-4862
    Keywords: Crack detection ; NDE ; SQUID magnetometry ; magnetic methods ; current perturbation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract A highly sensitive multichannel SQUID gradiometer, optimized uniquely for spatial resolution, was used to map in two dimensions the magnetic field perturbations from circular holes and thin slots in conducting plates and strips, respectively. Holes as small as 0.75 mm radius in electrically conducting plates were measured directly using a single channel. Edge slots as short as 0.5 mm long in conducting strips were detected, using a multiple-channel measurement method which eliminated the effects from the edge of the strip and the current leads. Clear magnetic signatures from these simulated cracks were measured using low current densities. Numerical computations of the theoretical field distributions are presented which confirm the experimental results. Calculations indicate that much smaller defects should be detectable with an optimization of test parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568105
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  • 10
    Electronic Resource
    Electronic Resource
    Resonant phonon modes in doped granular aluminum films (1971)
    Springer
    Journal of low temperature physics 5 (1971), S. 107-111 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Very dilute doping of granular Al films with Ag, Cu, or Au alters the superconducting tunneling behavior of such films in a manner consistent with the appearance of resonant phonon modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00628233
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