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  • 1
    Electronic Resource
    Electronic Resource
    Yield of Solvated Electrons in the Aliphatic Alcohols at Picosecond Times (1974)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 78 (1974), S. 2414-2416 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150671a022
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  • 2
    Electronic Resource
    Electronic Resource
    Centerline velocity decay of a circular jet in a counterflowing stream (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 10 (1998), S. 637-644 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We use an advection hypothesis to analyze the decay of centerline velocity of a circular jet issuing into a counterflowing stream. Working in the Lagrangian frame, we follow the locations and velocity gradients of jet fluid particles along the jet central axis while the particles are being advected backwards by the counterflow. The spatial velocity gradient along the jet centerline is thus obtained and subsequently integrated to describe the spatial decay of axial velocities. Laser-doppler velocity measurements are performed in the laboratory and the data are well predicted by our analytical expression of centerline velocity decay. Looking from another view, our treatment supports that the effect of an external axial flow stream on the jet flow field can be represented by a certain degree of stretching or contracting of the jet in the axial direction. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.869589
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  • 3
    Electronic Resource
    Electronic Resource
    Evolution of microcracks in brittle solids under intense dynamic loading (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 3479-3483 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An evolution equation of microcracks for brittle cracked materials subjected to an applied dynamic tensile pressure is presented. The influence of inertial effects (or kinetics) on the dynamic growth of microcracks, which is a major characteristic of intense dynamic loading, is taken into account. Numerical analysis of the evolution equation clearly indicates that microcrack growth at high strain rate (ε(overdot)≥103 s−1) is unstable. The critical condition for microcrack dynamic growth is obtained. It is predicted that the threshold stress for dynamic growth of microcracks is dependent on the average strain rate at super-high strain rate (ε(overdot)≥106 s−1); however, numerical result is also shown that when the average strain rate ≤105 s−1, the threshold stress can be, approximately, taken to be a constant. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359564
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  • 4
    Electronic Resource
    Electronic Resource
    Activation of boron implanted in Hg0.7Cd0.3Te by high-temperature annealing (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4983-4988 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Boron was implanted into the p-type Hg0.7Cd0.3Te epitaxial crystals. The implantation was carried out using a fluence of 1.45×1015 cm−2 and an energy of 100 keV. The implanted specimens, as well as unimplanted ones, were annealed without encapsulation by one-zone annealing in an atmosphere of mercury vapor supplied from liquid mercury at temperatures from 250–500 °C. From the annealing of unimplanted specimens, a p-n transition at 350 °C is observed. On the other hand, from the annealing of implanted specimens, it is found that the n-type conductivity induced by implantation damage is gradually reduced with the increase of annealing temperature until a minimum appears around 350 °C, and then increases again. An enhancement of n-type conductivity can be further observed from annealing under a reduced pressure of mercury. A similar result is also obtained from the annealing of implanted specimens using a HgTe compound as the mercury reservoir instead of liquid mercury. The results suggest that the implanted borons become activated dopants after annealing at high temperature. A mechanism on the activation of boron in HgCdTe is thus proposed, and the experimental results can be satisfactorily explained by the mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340444
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  • 5
    Electronic Resource
    Electronic Resource
    On the condition of streak formation in a bounded turbulent flow (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 306-320 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Flow between two surfaces at which no-slip and free-slip conditions can be imposed has been investigated numerically with a Fourier–Chebyshev pseudospectral method. Different mean shear rates have been applied to each boundary to study the effect of shear and boundary condition on the streaky structures that have been observed near walls in many previous investigations. In addition to the streaks found near the no-slip wall, the computations also reveal streaky structures when the free-slip surface is under a sufficiently high shear. The low-speed streaks observed near the free-slip surface, although appearing somewhat more pronounced, have much the same characteristics as the wall-layer streaks—e.g., the average spanwise spacing between the streaks both near the wall and the free surface is about 100 when normalized by the kinematic viscosity and the appropriate shear velocity (at the wall or at the free-slip surface). The results show that shear is much more important than the nature of the boundary in determining the dominant flow structure, rather unexpected since vortex lines can attach at a free-slip boundary whereas they cannot at a no-slip one. The formation of streaks appears to be governed by a local nondimensional shear parameter defined as S˜≡S||〈u'w'〉||/ε, where S is the mean shear rate, and 〈u'w'〉 and ε are the kinematic turbulent shear stress and rate of dissipation of turbulent kinetic energy, respectively. It is found that S˜(approximately-equal-to)1.0 is the condition at which the elongated low-speed streaky regions first appear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.858306
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  • 6
    Electronic Resource
    Electronic Resource
    Mirror ratio scaling of axial confinement of a mirror-trapped collisional plasma (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 3433-3438 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The axial confinement time of a single cell mirror is found to be proportional to the mirror ratio over the range of 12–74 when the mean free path for Coulomb collisions is less than one-third of the length of the device. The reduction in total end-loss current is shown to correspond to the reduction of the cross-sectional area of the plasma at the mirror throat as the mirror ratio is increased. The end-loss current density is independent of the mirror ratio and is proportional to the product of the plasma density and the acoustic speed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865859
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  • 7
    Electronic Resource
    Electronic Resource
    Phase-locked eduction of vortex shedding in flow past an inclined flat plate (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 1159-1168 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Flow past an inclined flat plate at an angle of attack of 30° and a Reynolds number of 30 000 is investigated experimentally. The velocity field in the wake is measured with a laser doppler anemometer (LDA) in the region from one plate breadth downstream to three and a half-plate breadths downstream. Controlled forcing is applied to the wake by vibrating the plate in the across-wind direction at a frequency in the middle of the lock-in range. The forcing serves to enhance the regularity and two-dimensionality of vortex shedding from the plate. It also facilitates phase-locked averaging of the LDA data. The LDA bursts are sorted according to their arrival instants relative to a particular phase of the vortex shedding cycles. The phase-averaged velocity results reveal large-scale vortical structures in the wake. Dynamical properties of these structures such as coherent vorticity and Reynolds stress production are discussed. The wake is found to be strongly asymmetric. The flow dynamics in the wake are dominated by a train of counterclockwise vortices shed from the trailing edge of the plate. The development, shedding and subsequent convection of these vortices are studied by following the consecutive phases of the shedding cycle. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868907
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  • 8
    Electronic Resource
    Electronic Resource
    Oxidative phosphorylation. XX. Stoichiometric aspects of uncoupling of oxidative phosphorylation by a salicylanilide derivative (1970)
    s.l. : American Chemical Society
    Biochemistry 9 (1970), S. 3599-3604 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00820a015
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  • 9
    Electronic Resource
    Electronic Resource
    Observation of radio-frequency field induced plasma loss in a simple mirror (1988)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 31 (1988), S. 1787-1789 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-frequency parallel electric fields applied to plasmas confined in a simple magnetic mirror cause enhanced plasma loss. The plasma potential rises because of a population of electrons in the magnetic loss cone that are accelerated to parallel energies significantly higher than the bulk electron temperature. The radio-frequency induced plasma loss has a nonambipolar component, with ions lost predominantly in the radial direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866667
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  • 10
    Electronic Resource
    Electronic Resource
    Wake and wake-induced shear-layer excitation in an annular jet (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 3121-3134 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The wake and wake-induced structures in the initial region of an annular jet (with a center body truncated at the jet exit plane) are studied from the measurements of velocity correlation and conditional sampling. Both sets of structures are found to play an important role in momentum transports and Reynolds stress production. They are also found to be oriented in a quasi-two-dimensional orderly pattern. In the initial outer shear layer, a large-scale instability is induced by the shedding of the vortex-street-like wake structures from the center body. This wake-induced instability is associated with the formation of the induced coherent structures and the subsequent zigzag staggered pattern occupied by them and the inner wake structures on the quasi-two-dimensional orderly plane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865963
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