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  • 1
    Electronic Resource
    Electronic Resource
    Truncated-gene reporter system for studying the regulation of manganese peroxidase expression (1997)
    Springer
    Current genetics 31 (1997), S. 519-524 
    Details
    ISSN: 1432-0983
    Keywords: Key words Manganese peroxidase ; Lignin degradation ; Phanerochaete chrysosporium ; Gene regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The expression of manganese peroxidase (MnP) in nitrogen-limited cultures of Phanerochaete chrysosporium is regulated by Mn, heat shock (HS), and H2O2 at the level of gene transcription. We have constructed a homologous gene reporter system to further examine the regulation of two mnp genes, mnp1 and mnp2, encoding individual MnP isozymes. Internal deletions of 234 and 359 bp were made within the coding regions of the mnp1 and mnp2 genes, respectively. The truncated mnp genes were subcloned into the shuttle vector pOGI18, which includes the Schizophylum commune ade5 gene as a selectable marker, and transformed into a P. chrysosporium Ade1 auxotrophic mutant. Northern-blot analysis of purified Ade+ transformants demonstrated that both of the truncated mnp genes were regulated in a manner similar to the endogenous mnp genes with respect to nitrogen limitation and induction by Mn, HS, and H2O2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940050239
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  • 2
    Electronic Resource
    Electronic Resource
    Applications of artificial neural networks to the nonlinear combination of forecasts (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Expert systems 13 (1996), S. 0 
    Details
    ISSN: 1468-0394
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: Abstract: This paper proposes artificial neural networks (ANN) as a tool for nonlinear combination of forecasts. In this study, three forecasting models are used for individual forecasts, and then two linear combining methods are used to compare with the ANN combining method. The comparative experiment using real-world data shows that the prediction by the ANN method outperforms those by linear combining methods. The paper suggests that the ANN method can be used as an alternative to conventional linear combining methods to achieve greater forecasting accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0394.1996.tb00119.x
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  • 3
    Electronic Resource
    Electronic Resource
    Transport properties of stoichiometric and nonstoichiometric GdAs single crystals (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 264-270 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A systematic investigation of the transport properties of GdAs single crystals is presented. We report on measurements of the electric resistivity, magnetoresistance and Hall effect performed on a stoichiometric and a nonstoichiometric sample at temperatures between 1.6 and 300 K in fields up to 10 T. The stoichiometric sample behaved as a well compensated semimetal that orders antiferromagnetically, while the nonstoichiometric sample showed some anomalies that could be explained qualitatively by the model of trapped magnetic polarons. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362814
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  • 4
    Electronic Resource
    Electronic Resource
    Improvement of Highway Safety I: Identification of Causal Factors Through Fault-Tree Modeling (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Risk analysis 15 (1995), S. 0 
    Details
    ISSN: 1539-6924
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: As the first article of a two-part series, the purpose of this paper is to examine the functional factors that contribute to automobile accident occurrence and to model the causation structure in the form of a fault-tree. The fault-tree model provides an intuitive framework for qualitatively decomposing possible pathways to accident occurrence. Fault-tree analysis also provides a statistical representation of how interacting driver, vehicle, and environmental factors contribute to the likelihood of automobile accident occurrence. The application of this model facilitates pinpointing those factors that most contribute to accident causation and subsequently enables the identification and comparison of potential crash avoidance technologies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1539-6924.1995.tb00323.x
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  • 5
    Electronic Resource
    Electronic Resource
    Scaling of the thermoremanent relaxation in FeNiCr : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 6618-6620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present measurements of the relaxation of the low field thermoremanent magnetization of Fe0.65Ni0.24Cr0.11 over four decades of observation time 1 s〈t≤104 s, as a function of temperature T and system age tw. The system orders ferromagnetically at Tc(approximately-equal-to)110 K and then, near TR(approximately-equal-to)50 K collapses into a much less responsive low-temperature phase, with glassy, age-dependent dynamics appearing below Tg(approximately-equal-to)22 K. We have analyzed the data using a model of random traps developed by Bouchaud, according to which the relaxation curves for different tw at a given temperature T will scale onto a universal curve when plotted as a function of t/tw, provided that proper account is taken of the distribution of ergodic times terg possessed by a real system. With the assumption of a log-normal distribution P(terg), we have calculated the nonuniversal correction-to-scaling factor explicitly, and we have shown that the data do indeed collapse remarkably well onto a universal curve, with a suitable choice of values for the two distribution parameters, and for the two relaxation function parameters. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361902
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  • 6
    Electronic Resource
    Electronic Resource
    Competition between two resonance frequency branches in a waveguide free-electron laser (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 426-428 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: One of the problems encountered in designing a waveguide free-electron laser (FEL) is to suppress the lower-frequency branch, which may have a higher gain than the more useful higher-frequency branch. It is shown that the electron pulse length and energy spread strongly influence the competition between the gains at high and low frequency for a waveguide FEL. It is also found that the negative slippage that may take place at the lower-frequency branch results in larger reduction in gain than the positive slippage. The maximum allowable electron energy spread for both resonance frequencies is derived. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359347
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  • 7
    Electronic Resource
    Electronic Resource
    Simple device and reproducible approach for producing high efficiency optical fiber tips for a scanning near-field optical microscope (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 3439-3440 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A heating–pulling device is established for producing the optical fiber probe used in scanning near-field optical microscopy. A CO2 laser, the power of which can be adjusted continuously between 0 and 10 W, is used as the heating source. Pulling is done by two identical motors. On the basis of the device, a novel approach different from the conventional heating–pulling method is developed, which eliminates the need for a computer, reflective mirror, and varied force during tip formation. Thus it is simple and easy to use. The cost is reduced greatly. Tips with parabolic taper, short taper region, and a diameter of 65 nm, which are optimal conditions for high transmission efficiency, are obtained. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149112
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  • 8
    Electronic Resource
    Electronic Resource
    Compact electron-accelerator system using laser-induced photoelectrons and DISKTRON electrostatic accelerator (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1010-1014 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new type of relativistic electron acceleration facility is being developed by the Laser Science Research Group at The Institute of Physical and Chemical Research. It utilizes laser-induced photoelectrons accelerated by a compact DISKTRON electrostatic accelerator, which makes it possible to generate a controllable bright short-pulsed electron beam up to the energy of 1 MeV with a low emittance (〈2×10−5 mrad) and high current density (∼500 A/cm2) without any guiding field. The characteristics of the entire facility and some of the key components are described in detail. The experimental results which confirm the possibilities of increasing quantum efficiency of metal photocathodes by geometric alteration are reported. Observation of laser undulator effects in the visible wavelength was demonstrated in the facility. The coming use of the system includes a far-infrared/submillimeter free-electron laser using a microwiggler and generation of extreme ultraviolet radiation by the laser undulator. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146037
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  • 9
    Electronic Resource
    Electronic Resource
    Liquid coated melt-spun Nd–Fe–B powders for bonded magnets (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4871-4873 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The liquid coating (LC) has been employed to apply epoxy and lubricant over the surface of rapidly solidified Nd–Fe–B powder particles. The LC led to an improvement of physical and magnetic properties for the powders and magnets compared to the dry blending and the encapsulation methods. The LC powders have excellent flowability and can be used for bonded magnets requiring very close tolerances; further bonded magnets made using this powder posses higher strength.© 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370049
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  • 10
    Electronic Resource
    Electronic Resource
    The role of potential fluctuations in continuous-wave donor–acceptor pair luminescence of heavily doped materials (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 1243-1245 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It has recently become apparent that "standard" (low-concentration and low-compensation) theory for donor–acceptor pair (DAP) photoluminescence (PL) is totally incapable of explaining results in highly doped and compensated material. It can be noted that such material is often of high technological interest. It has been argued, mainly qualitatively, that the discrepancies result from potential fluctuations due to random ionic charges. We here present a quantitative theory for cw DAP PL, using an approximate model. We also present data for the concentration and intensity dependence of DAP PL in heavily doped ZnSe:N, and show that the results are explained very satisfactorily by our fluctuation model. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124655
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