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  • 1
    Electronic Resource
    Electronic Resource
    The effects of pressure on the nucleation rate of an undercooled liquid (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 5721-5723 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of pressure change on the homogeneous nucleation process are considered, including modeling of the dependence of the melt-crystal interfacial energy on the applied pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350510
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Noncontact charge measurement (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 2040-2043 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel method and system for measuring a static charge field in a noncontact manner has been developed. This system is based on the principle of reciprocal motion of a grounded conductor near a point charge. Experiments were done to characterize this new system and are in good agreement with the theoretical prediction. This system exhibits extremely good linearity with respect to the input electric field and has a resolution of better than 10 V/m, which is about two to three orders of magnitude in sensitivity higher than the one being used. The high sensitivity of this apparatus makes the system feasible for use at a safe distance in various applications where static charge must be monitored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143162
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Atomic force microscopy used for the surface characterization of microcapsule immunoisolation devices (1998)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 41 (1998), S. 461-467 
    Details
    ISSN: 0021-9304
    Keywords: microencapsulation ; diabetes ; atomic force microscopy ; surface characterization ; immunoisolation device ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The surface morphology of the microcapsule used as a bioartificial pancreas was examined by atomic force microscopy (AFM) under ambient conditions in a liquid environment. The standard contact mode was used for imaging. The capsules exhibited different morphologies and surface roughness depending on the composition of the cation solution: namely, the mole ratio of antigelling and gelling cations [Na+]/[Ca2+]. Surface roughness parameters obtained by AFM measurements provide quantitative information on the surface properties of the capsular membrane. In this respect, AFM can be considered a valuable technique complementary to optical microscopy in providing feedback for capsule optimization. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 41, 461-467, 1998.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
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    Noncontact charge measurement (1992)
    American Institute of Physics
    Details
    Publication Date: 1992-03-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics
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    PAPER CURRENT
  • 5
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    The effects of pressure on the nucleation rate of an undercooled liquid (1992)
    American Institute of Physics
    Details
    Publication Date: 1992-06-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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  • 6
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    The centring dynamics of a thin liquid shell in capillary oscillations (1988)
    Cambridge University Press
    Details
    Publication Date: 1988-03-01
    Description: The physical mechanism governing the centring of a hollow liquid shell in capillary oscillations, which has been observed in experiments, is investigated theoretically. First, the shell is assumed to be inviscid and to have a thickness that is much less than its spherical radius. A system of one-dimensional nonlinear equations of motion is derived using a thin-sheet model. From a numerical study the nonlinear effects of the wave are found to cause the core to oscillate slowly relative to the shell while the centre of mass of the whole system remains stationary. The effects of small viscosity are then considered in an approximation. Finally the strength of the centring mechanism is compared with that of the decentring effect due to buoyancy. The findings are consistent with the limited experimental information available. © 1988, Cambridge University Press. All rights reserved.
    Print ISSN: 0022-1120
    Electronic ISSN: 1469-7645
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Cambridge University Press
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  • 7
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    The centring dynamics of a thin liquid shell in capillary oscillations (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The physical mechanism governing the centring of a hollow liquid shell in capillary oscillations, which has been observed in experiments, is investigated theoretically. First, the shell is assumed to be inviscid and to have a thickness that is much less than its spherical radius. A system of one-dimensional nonlinear equations of motion is derived using a thin-sheet model. From a numerical study the nonlinear effects of the wave are found to cause the core to oscillate slowly relative to the shell while the centre of mass of the whole system remains stationary. The effects of small viscosity are then considered in an approximation. Finally the strength of the centring mechanism is compared with that of the decentring effect due to buoyancy. The findings are consistent with the limited experimental information available.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Journal of Fluid Mechanics (ISSN 0022-1120); 188; 411-435
    Format: text
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  • 8
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    Equilibrium shapes of rotating spheroids and drop shape oscillations (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Recent work on the equilibrium shapes of a rotating spheroid and drop shape oscillations is reviewed. The related theoretical aspects of the equilibrium shapes of a rotating drop, the stability, shape oscillations, gravitational forces, and drop fission are examined. Experimental findings on figures of a rotating drop in an immiscible system, drop oscillations in an immiscible system, oscillations of a rotating drop, compound drop oscillations, and drop dynamics in space are addressed.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Acoustic radiation force on a heated sphere including effects of heat transfer and acoustic streaming (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A previous theoretical result on the subject of the acoustic radiation force on a heated sphere (Lee and Wang, 1984) is reexamined. For a more complete understanding, effects of heat transfer and acoustic streaming are taken into consideration. Essentially, it was found that, at high sound-pressure levels in a steady situation, the force is not affected significantly by the temperature profile, consistent with the result of an experimental work (Leung and Wang, 1985). This resolves the earlier apparent contradiction between the theory and the experiment. If excessive hot air is accumulated around the sphere, which can happen in transient situations, the force can be weakened or reversed in sign. A heat transfer model due to acoustic streaming was also found.
    Keywords: ACOUSTICS
    Type: Acoustical Society of America, Journal (ISSN 0001-4966); 83; 1324-133
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Acoustic force measurement in a dual-temperature resonant chamber (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The acoustic radiation force was measured for a dual-temperature resonant chamber. This rectangular chamber has its long dimension approximately 8.5 times the square cross-sectional dimension, and the opposite ends are at widely different temperatures. Force profiles were obtained for two hot end temperatures of 520 C and 760 C, while the cool end remained at approximately room temperature. Force magnitudes as high as 17 dyn for a sample 1.2 cm in diameter at 760 C and at 162-dB input level were measured.
    Keywords: ACOUSTICS
    Type: Acoustical Society of America, Journal (ISSN 0001-4966); 82; 1039-104
    Format: text
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    NASA TECHNICAL REPORTS
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