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  • 1
    Electronic Resource
    Electronic Resource
    Thermophysical properties of the lanthanide sesquisulfides. IV. Schottky contributions, magnetic, and electronic properties of ε-phase Yb2S3 and Lu2S3 (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 1458-1463 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The heat capacities of ε-phase Yb2S3 and Lu2S3 have been determined from 6 to 350 K and their thermodynamic properties evaluated. The resolution of the Schottky and magnetic properties by evaluation of the lattice heat capacity is shown to be in accord with spectroscopically determined energy levels. The lattice heat capacity of Yb2S3 was determined by means of the Komada–Westrum phonon distribution model. Excess heat-capacity contributions were thus evaluated and analyzed as Schottky and magnetic heat capacities. A phase transition associated with magnetic ordering was detected in the heat capacity of Yb2S3 near 7 K with an entropy content of 0.68R. The entropies at 298.15 K are 22.77R and 19.74R for Yb2S3 and for Lu2S3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465080
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  • 2
    Electronic Resource
    Electronic Resource
    Strongly nonlinear evolution of low-frequency wave packets in a dispersive plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 2021-2035 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The evolution of strongly nonlinear, strongly modulated wave packets is investigated in a dispersive plasma using a hybrid numerical code. These wave packets have amplitudes exceeding the strength of the external magnetic field, along which they propagate. Alfvén (left helicity) wave packets show strong steepening for β〈1, while fast (right helicity) wave packets hardly steepen for any β. Substantial regions of opposite helicity form on the leading side of steepened Alfvén wave packets. This behavior differs qualitatively from that exhibited by the solutions to the derivative nonlinear Schrödinger (DNLS) equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860789
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High-resolution spectroscopy of organic molecules in solids: from fluorescence line narrowing and hole burning to single molecule spectroscopy (1993)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 97 (1993), S. 10256-10268 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100142a003
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Associations of Dyslexia with Epilepsy, Handedness, and Gender (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 682 (1993), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1993.tb23006.x
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  • 5
    Electronic Resource
    Electronic Resource
    Photon bunching in the fluorescence from single molecules: A probe for intersystem crossing (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 850-859 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Fluorescence photons emitted by a single molecule trapped in a solid at low temperature are correlated in time. A simple theory of the correlation pattern is presented, including in the same formalism photon antibunching from coherent Rabi oscillations and photon bunching due to incoherent quantum transitions between electronic levels. The correlation method is applied to single pentacene molecules in a para-terphenyl crystal. A clear photon bunching allows us to determine the ISC rates for each molecule. We attribute the scatter of our results for the transition rate between excited singlet and triplet states, and the difference with the average value taken from the literature, to molecular distortions induced by crystal defects in our small sample. We conclude that the correlation method associated to single molecule spectroscopy has a great potential to study dynamical processes on intermediate time scales in condensed matter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.464249
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  • 6
    Electronic Resource
    Electronic Resource
    The evolution of strongly modulated, low-frequency, moderate-amplitude wave packets in a dispersive plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 42-54 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The evolution of strongly modulated wave packets in a dispersive plasma that propagate parallel to the magnetic field is studied. Modulation effects are shown to reduce significantly (≈30%) the rate of spreading from that due to dispersion alone. For fluidlike behavior, nonlinearity has its greatest impact on evolution when the linear sound speed and initial wave packet speeds are well matched, resulting in a strong coupling between the wave magnetic and sonic components. Ion kinetic processes reduce the impact of nonlinearity and cause the rate of spreading to approach that expected from dispersion alone as the ratio of ion and electron temperatures, Ti/Te→4. For β(approximately-greater-than)1 and Ti/Te∼1, the coupled waveforms correspond qualitatively to kinetic treatments of the derivative nonlinear Schrödinger (DNLS) equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860866
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  • 7
    Electronic Resource
    Electronic Resource
    Disintegration and Re-Integration: Logistics of the Twenty-First Century (1993)
    Bradford : Emerald
    The @international journal of logistics management 4 (1993), S. 1-12 
    Details
    ISSN: 0957-4093
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: The traditional hierarchical model of command and control that served through the U.S. Industrial Revolution has undergone significant change in the past decade. Part of the changes have been prompted by global alliances of business partners. Other changes are the result of new enabling information technology that dramatically alters the role of information in the corporation. Still other changes are the result of new cycle-time-to-market metrics on the part of buyer and seller. The re-integration of the channel will present significant, new challenges and opportunities to the corporate logistics function. The logistics function of the firm will provide the ideal "boundary spanning" role to re-integrate and position the firm for global competitiveness in the 21st century. However, new skill, new knowledge bases, new technology and new performance metrics will be required to meet the objective.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/09574099310804948
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  • 8
    Electronic Resource
    Electronic Resource
    Moment integrals of powers of airy functions (1993)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 44 (1993), S. 891-908 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract Difference equations for moment integrals which contain powers of the Airy functionAi(z) and its derivativeAi'(z) i.e. $$\int_0^\infty {z^n [Ai(z)]^\alpha dz,} \int_0^\infty {z^n [Ai'(z)]^\alpha dz,} $$ are obtained. These equations are easily solved for the special case of integer α. The moments occur in recent analytical attempts at solving certain nonlinear problems in Physics and Chemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00942815
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  • 9
    Electronic Resource
    Electronic Resource
    Optical detection of magnetic resonance in a single molecule (1993)
    [s.l.] : Nature Publishing Group
    Nature 363 (1993), S. 244-245 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Single-molecule spectroscopy is usually done by observing fluorescence from a molecule driven several million times per second through the excitation-emission cycle. Occasionally, the molecule crosses over to the triplet manifold, and stays there for the average triplet lifetime. Consequently, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/363244a0
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  • 10
    Electronic Resource
    Electronic Resource
    A new finite difference scheme adapted to the one-dimensional Schrödinger equation (1993)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 44 (1993), S. 654-672 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We present a new discretisation scheme for the Schrödinger equation based on analytic solutions to local linearisations. The scheme generates the normalised eigenfunctions and eigenvalues simultaneously and is exact for piecewise constant potentials and effective masses. Highly accurate results can be obtained with a small number of mesh points and a robust and flexible algorithm using continuation techniques is derived. An application to the Hartree approximation for SiGe heterojunctions is discussed in which we solve the coupled Schrödinger-Poisson model problem selfconsistently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00948481
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