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  • 1
    Electronic Resource
    Electronic Resource
    A new approach to GPS ambiguity decorrelation (1999)
    Springer
    Journal of geodesy 73 (1999), S. 478-490 
    Details
    ISSN: 1432-1394
    Keywords: Key words. Lambda method ; United ambiguity ; decorrelation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract. Ambiguity decorrelation is a useful technique for rapid integer ambiguity fixing. It plays an important role in the least-squares ambiguity decorrelation adjustment (Lambda) method. An approach to multi-dimension ambiguity decorrelation is proposed by the introduction of a new concept: united ambiguity decorrelation. It is found that united ambiguity decorrelation can provide a rapid and effective route to ambiguity decorrelation. An approach to united ambiguity decorrelation, the HL process, is described in detail. The HL process performs very well in high-dimension ambiguity decorrelation tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00004003
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  • 2
    Electronic Resource
    Electronic Resource
    Novel virulence properties of the Salmonella typhimurium virulence-associated plasmid: Immune suppression and stimulation of splenomegaly
    Amsterdam : Elsevier
    Plasmid 21 (1989), S. 48-58 
    Details
    ISSN: 0147-619X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0147-619X(89)90086-3
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal stability study of Ni/Ta n-GaN Schottky contacts (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 595-597 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Schottky behavior of Ni/Ta and Ni contacts on n-GaN was investigated under various annealing conditions by current–voltage measurements. It is found that with the addition of Ta between the Ni layer and the GaN substrate the thermal stability properties of devices can be significantly improved. Experimental results indicate that a high quality Ni/Ta n-GaN Schottky diode with an ideality factor and barrier height of 1.16 and 1.24 eV, respectively, can be obtained under 1 h annealing, at 700 °C. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1425455
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  • 4
    Electronic Resource
    Electronic Resource
    Isoelectronic In-doping effect in GaN films grown by metalorganic chemical vapor deposition (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 641-643 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The isoelectronic In-doping effect in GaN films grown by metalorganic chemical vapor deposition was investigated by using Raman scattering, scanning electron microscopy (SEM), and x-ray and photoluminescence (PL) measurements. In our study, the phonon spectra of films remain sharp without alloy formation after incorporation of small amounts of In atoms. The SEM pictures of the sample surface reveal greatly reduced nanopits indicating better surface flatness that is also supported by the multiple interference effect in the PL signals. More importantly, isoelectronic doping has caused the linewidth at 15 K of the near-band-edge emission of GaN to decrease sharply to 10 meV or less, reflecting improved optical property. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121933
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  • 5
    Electronic Resource
    Electronic Resource
    Negative differential resistance in InGaAs/AlAsSb/InGaAs single-barrier heterostructure (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 1373-1375 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have observed negative differential resistance in InP lattice-matched InGaAs/AlAsSb/InGaAs single-barrier tunneling heterostructure. With a 10-nm-thick barrier, the diode exhibits a peak-to-valley current ratio of 4.2 (1.2) and peak current density of 54 (158) A/cm2 at 100 K (300 K). © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119898
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  • 6
    Electronic Resource
    Electronic Resource
    Successful treatment of severe streptococcal toxic shock syndrome with a combination of intravenous immunoglobulin, dexamethasone and antibiotics (1997)
    Springer
    Infection 25 (1997), S. 47-48 
    Details
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02113510
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  • 7
    Electronic Resource
    Electronic Resource
    Optimal design of controlled structures (1996)
    Springer
    Structural and multidisciplinary optimization 11 (1996), S. 19-28 
    Details
    ISSN: 1615-1488
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A formulation that finds the optimal design of a controlled structure is proposed. To achieve this goal, a composite objective composed of structural and control objectives is introduced to be optimized, and the effect of the control weighting is examined. A feedback control law is defined before the structural optimization and then the composite objective will only become a function of structural design variables. As a result, optimal structural design and control forces in steady state are obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279651
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  • 8
    Electronic Resource
    Electronic Resource
    A comparison of planned unbalanced designs for estimating heritability in perennial tree crops (1985)
    Springer
    Theoretical and applied genetics 71 (1985), S. 536-544 
    Details
    ISSN: 1432-2242
    Keywords: Minimum Variance Quadratic Unbiased ; Estimates ; Design efficiency ; Plot size ; Variable family size ; Number of families
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary One hundred families of average size 10 are allocated in single-tree plots to 20 blocks in several planned unbalanced designs. Based on the variance of the estimate of heritability from the Minimum Variance Quadratic Unbiased Estimates and 100% survival, the three partially balanced designs are equally efficient. A design with variable family size is more efficient for heritabilities (h2) generally less than 0.25; an equal family size design is more efficient for h2 generally greater than 0.25. A design with a large number of small families is more efficient at high h2 than that with a small number of large families; a design with fewer families of larger size is more efficient at low h2. Two-tree plot designs are never more efficient than single-tree plot designs and are also shown to be sensitive to the magnitude of the variance components that generate a given h2, whereas the single-tree plot designs are not.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00251202
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  • 9
    Electronic Resource
    Electronic Resource
    Characterization of nuclear localization of a hepatitis B virus precore protein derivative P22 (1996)
    Springer
    Archives of virology 141 (1996), S. 425-438 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Both of hepatitis B virus core protein and a precore protein derivative, named P22, have been shown to localize in the nucleus. Although P22 has ten additional amino acid residues at its amino-terminus, both proteins contain the same nuclear localization signal. In order to understand the mechanism that regulates the activity of this signal, we have studied the nuclear localization of P22 and compared it with that of core protein. It was found that both cytosolic and nuclear fractions of P22 were phosphorylated but to a lesser extent when compared with cytosolic core protein. This distinction was likely attributed to different conformations between these two proteins since the density gradient analysis revealed a different particle formation for P22 in the cytosol. When expressed in Vero cells synchronized by serum deprivation, P22 remained in the cytosol during G0 and G1 phases, accumulated gradually in the nucleus during S phase, and largely localized in the nucleus when cells were confluent. On the other hand, the core protein was transported into the nucleus during mid-G1 phase, shuttled back to the cytosol in S phase and again accumulated in the nucleus when cells were confluent. Interestingly, when aphidicolin was used to arrest the cells in late G1 phase, both proteins were found to accumulate in the nuclei. These results indicated that although both P22 and core proteins possessed the same nuclear localization signal, the cellular regulation of their nuclear transport was not identical and might involve different molecular mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01718307
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  • 10
    Electronic Resource
    Electronic Resource
    Viscous dissipation effects on thermal entrance region heat transfer in pipes with uniform wall heat flux (1973)
    Springer
    Flow, turbulence and combustion 28 (1973), S. 289-301 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The analytical solution to Graetz problem with uniform wall heat flux is extended by including the viscous dissipation effect in the analysis. The analytical solution obtained reduces to that of Siegel, Sparrow and Hallman neglecting viscous dissipation as a limiting case. The sample developing temperature profiles, wall and bulk temperature distributions and the local Nusselt number variations are presented to illustrate the viscous dissipation effects. It is found that the role of viscous dissipation on thermal entrance region heat transfer is completely different for heating and cooling at wall. In the case of cooling at wall, a critical value of Brinkman number, Br c=−11/24, exists beyond which (−11/24〈Br〈0) the fluid bulk temperature will always be less than the uniform entrance temperature indicating the predominance of cooling effect over the viscous heating effect. On the other hand, with Br 〈 Br c the bulk temperature T b will approach the wall temperature T w at some downstream position and from there onward the bulk temperature T b becomes less than the wall temperature T w with T w 〉 B b 〉 T 0 indicating overall heating effect for the fluid. The numerical results for the case of cooling at wall Br 〈 0 are believed to be of some interest in the design of the proposed artctic oil pipeline.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413074
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