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  • 1
    Electronic Resource
    Electronic Resource
    Gas flow in vertical slots with large horizontal temperature differences (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 2365-2374 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Perfect gas exact solutions to the steady Navier–Stokes equations are given for laminar convective motion in open and closed vertical slots with large temperature differences using Sutherland law transport properties. The solutions are valid a few slot widths away from the ends in the asymptotic region where the opposite hot and cold wall boundary layers are fully merged. It is found that the static pressure (in the closed slot) and temperature and velocity distributions (in all cases) are very sensitive to property variations, even though the heat flux may not be. We observe the net horizontal and vertical heat fluxes to be the same as those obtained from the Boussinesq equations. Comparisons with constant property solutions and the well-known Boussinesq limiting solution for small temperature differences are given for examples using air.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865295
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  • 2
    Electronic Resource
    Electronic Resource
    Gas flow in open vertical slots with large horizontal temperature differences and arbitrary external temperature (1986)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 29 (1986), S. 3187-3198 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Exact solutions to the steady Navier–Stokes equations are given for laminar convective motion in open vertical slots immersed in a perfect gas. The solutions are for large temperature differences using Sutherland law transport properties and an arbitrary external temperature. The solutions are valid in the fully developed region where the opposite hot and cold vertical wall boundary layers are fully merged. It is found that the temperature, velocity, mass flow rate, and vertical heat flux are very sensitive to property variations, even though the horizontal heat flux is not. Furthermore, it is found that if only one end of the slot is open, the velocity and vertical heat flux are independent of the external temperature. Comparisons with constant transport property solutions and the well-known Boussinesq limiting solution for small temperature differences are given for examples using air or hydrogen; these show that important but significantly different effects exist as a result of density and transport property variations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865837
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Departures from the Boussinesq approximation in laminar Bénard convection (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 1561-1564 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A two-dimensional computer program has been used to obtain stability and heat transfer results for flow in an air layer heated from below. The gas is contained in a cavity of aspect ratio 20, with rigid conducting top and bottom walls, and rigid insulating side walls. Steady-state results are presented for a temperature difference parameter ε=β¯ΔT/2 as large as 0.6. Consistent with Busse's analysis [J. Fluid Mech. 30, 625 (1967)], it is found that the critical Rayleigh number and the Nusselt number correlation depend on ε2; furthermore the coefficients for the corrections are given here. For small but non-Boussinesq values of ε, the results are in agreement with the linear theory of Busse and the experimental results of Ahlers [J. Fluid Mech. 98, 137 (1980)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866218
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  • 4
    Electronic Resource
    Electronic Resource
    Stability of the explicit finite differenced transport equation
    Amsterdam : Elsevier
    Journal of Computational Physics 47 (1982), S. 489-496 
    Details
    ISSN: 0021-9991
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Computer Science , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0021-9991(82)90098-5
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  • 5
    Electronic Resource
    Electronic Resource
    Proximity focussed hybrid photo diode characteristics evaluations
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 342 (1994), S. 558-570 
    Details
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0168-9002(94)90287-9
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Circulating platelet aggregates: a chronic platelet activation in patients with transient ischaemic attacks (1979)
    Springer
    Neurological sciences 1 (1979), S. 163-169 
    Details
    ISSN: 1590-3478
    Keywords: Circulating Platelet Aggregates ; Chronic Platelet Activation ; Tias ; Antiplatelet Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario L'iperaggregabilità piastrinica è stata valutata in 62 pazienti affetti TIA mediante il metodo di Wu ed Hoak. Il confronto con controlli di pari età ha evidenziato un significativo aumento degli aggregati piastrinici circolanti indipendentemente all'epoca dell'ultimo attacco. I valori di PAR (paltelet aggregates ratio) sono risultati più ridotti nei pazienti con quadri angiografici patologici e più elevati nei malati con precedente terapia con ASA.
    Notes: Abstract Platelet hyperaggregability was tested in 62 TIA patients by means of the formalin fixing principle of Wu and Hoak. Compared to age-matched controls, the platelet aggregates ratio (PAR) was reduced from 0.99±0.04 SD to 0.807±0.14 SD. This means a highly significant increase of circulating platelet aggregates (CPA) in untreated TIA patients, regardless of the interval sinche the last attack (from 2 days to 1 year). PAR was especially reduced in patients with abnormal angiography (expressing pronounced cerebral or diffuse ATS) and it was possibly affected by previous antiplatelet treatment with ASA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02335846
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  • 7
    Electronic Resource
    Electronic Resource
    Naudicelle and platelet reactivity in TIA patients (1982)
    Springer
    Neurological sciences 3 (1982), S. 373-373 
    Details
    ISSN: 1590-3478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02043589
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  • 8
    Electronic Resource
    Electronic Resource
    Stability of unstably stratified shear flow in a channel under non-Boussinesq conditions (1995)
    Springer
    Acta mechanica 112 (1995), S. 37-58 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary We investigate the linear stability of unstably stratified Poiseuille flow between two horizontal parallel plates under non-Boussinesq conditions. It is shown that Squire's transformation can be used to reduce the three-dimensional stability problem to an equivalent two-dimensional one. The eigenvalue problem, consisting of the generalized Orr-Sommerfeld equations, is solved numerically using an integral Chebyshev pseudo-spectral method. The influence of the non-Boussinesq effects on stability is studied. The dependence of the critical Rayleigh number on the Reynolds number and temperature difference parameter is obtained. As in the Boussinesq case, results show that the most unstable mode is that of longitudinal rolls. However, in contrast to the Boussinesq case, the rolls are highly distorted for large temperature differences. In addition, the critical Rayleigh number increases with the increase of the temperature difference and is independent of the Reynolds number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01177477
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  • 9
    Electronic Resource
    Electronic Resource
    Higher Short-Term Virologic Efficacy of Three-Class Versus Two-Class Highly Active Antiretroviral Salvage Therapy in HIV-Infected Patients (2000)
    Springer
    European journal of clinical microbiology & infectious diseases 19 (2000), S. 380-384 
    Details
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The efficacy of two-class versus three-class antiretroviral salvage treatment was analyzed retrospectively in 63 HIV-infected patients in whom highly active antiretroviral therapy failed. Twenty-eight patients (group A) received two-class therapy, and 35 patients (group B) received three-class therapy. After 3 months of treatment, a significantly greater proportion of patients in group B (23/35, 65.7%) than in group A (8/28, 28.5%) showed a ≥1 log10 decrease in the plasma HIV RNA level (P=0.0034). However, after 9–12 months, 12 of 23 (52.1%) group B responders showed viral load rebound. The results were partially explained by the finding that, at baseline, the great majority (21/27, 77.7%) of group A patients showed mutations conferring resistance to all drugs administered, whereas in group B patients' susceptibility to at least two drug classes was retained. However, after 9–12 months of therapy, most (18/20, 90%) of the short-term responders in group B showed emergence of additional mutations that hampered long-term response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100960050499
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  • 10
    Electronic Resource
    Electronic Resource
    Post-stroke seizures (1998)
    Springer
    Neurological sciences 19 (1998), S. S26 
    Details
    ISSN: 1590-3478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713877
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