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  • 1
    Electronic Resource
    Electronic Resource
    Capillary-gravity waves generated in a viscous fluid (1985)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 46-51 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The linearized initial-value problem of capillary-gravity waves generated by a moving oscillatory surface pressure distribution in a viscous incompressible fluid of infinite depth is solved. It is found that viscosity apart from introducing a damping factor into the amplitude of each wave plays an important role in the critical case. While the solution in the inviscid fluid becomes singular for certain values of the parameters of the problem, the solution in viscous fluid remains valid for all values of the parameters, though the amplitudes are relatively large in the critical case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.865124
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Controlled trial of interventions to increase testing and treatment for Helicobacter pylori and reduce medication use in patients with chronic acid-related symptoms (2005)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Many symptomatic patients take proton pump inhibitors or histamine-2 blockers for years and those without gastro-oesophageal reflux disease might benefit from Helicobacter pylori eradication.Aim : To increase testing and treatment of H. pylori and reduce chronic use of proton pump inhibitors and histamine-2 blockers.Methods : We conducted a three-armed controlled trial in 14 managed care practices. We included adults who used proton pump inhibitors or histamine-2 blockers for 〉1 year and excluded those with gastro-oesophageal reflux disease or previous endoscopy. We compared usual care (n = 312 patients from 6 practices) to low-intensity (n = 147 from 3 practices) and high-intensity (n = 122 from 5 practices) interventions. Low-intensity intervention consisted of guidelines, patient-lists, and a ‘toolkit’; high-intensity intervention added academic group detailing by a gastroenterologist with reinforcement by pharmacists.Results : Compared with usual care, the high-intensity intervention increased H. pylori test-ordering (29% versus 9% at 12 months, P = 0.02). About half (23 of 58) of patients tested positive and 22 received eradication treatments. The high-intensity intervention decreased proton pump inhibitor use by 9% per year (P = 0.028), but did not alter histamine-2 blocker use. The low intensity intervention was ineffective.Conclusions : Providing guidelines, patient-lists, and toolkits was no better than usual care. Adding group detailing and pharmacist reinforcements led to improvements in H. pylori management and decreases in proton pump inhibitor use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02431.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Asymmetric stokes flows generated by the motion of a closed torus (1979)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 30 (1979), S. 967-982 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Exakte Lösungen der Stokes'schen Gleichungen werden für eine asymmetrische Strömung angegeben, die von einem geschlossenen Torus in einer ruhenden zähen Flüssigkeit erzeugt wird. Dieser Torus bewegt sich entweder entlang einer Achse oder rotiert um eine Achse, wobei diese Achse jedesmal senkrecht zur Symmetrieaches des Torus steht. Die Kraft und das Moment die am Körper angreifen werden berechnet, und die allgemeine Bewegung eines geschlossenen Torus wird untersucht.
    Notes: Abstract Exact solutions of the Stokes equations are given for asymmetric flows produced by a closed torus which steadily translates along or rotates about a direction perpendicular to its axis of rotational symmetry in a quiescent viscous fluid. The force and couple acting on the body are calculated and the general motion of a closed torus is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01590494
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Flow due to the longitudinal and torsional oscillation of a cylinder (1990)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 41 (1990), S. 598-603 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary An exact solution is obtained for the motion of a fluid contained in an infinité circular cylinder which is undergoing both torsional and longitudinal oscillations. An analytical expression is obtained for the viscous drag on the cylinder and the velocity is depicted graphically. Where possible, comparisons are made with corresponding results for the external problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00945958
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  • 5
    Electronic Resource
    Electronic Resource
    On axisymmetric stokes flow past a torus (1977)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 28 (1977), S. 541-550 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung In dieser Arbeit wird eine Methode entwickelt um die exakte Lösung der Stokes' schen Gleichung für einen axisymmetrischen Fluss um einen Torus zu erhalten. Indem man direkt Geschwindgkeits- und Druckverteilung ausrechnet (statt eine Stromfunktion einzuführen) wird das Problem auf die Lösung einer Differenzengleichung zweiter Ordnung für eine Folge von Koeffizienten reduziert. Die am Torus wirksame Kraft wird dann für mehrere Parameterwerte der Torusgeometrie bestimmt.
    Notes: Abstract A method is presented for determining the exact solution of the Stokes equation for axisymmetric streaming flow past a torus. By solving directly for the velocity and pressure fields rather than introducing a stream function, the problem is reduced to the solution of a second order difference equation for a coefficient sequence. The force acting on the torus is evaluated for a number of values of the parameter defining the torus geometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01601334
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Flat plate drag in a micropolar fluid (1986)
    Springer
    Acta mechanica 58 (1986), S. 99-112 
    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 The drag experienced in a micropolar fluid is investigated by considering uniform streaming past a flat plate. Some recent results on the fundamental solution of the Oseenlinearization of the micropolar flow equations are used to reduce the problem to that of solving a scalar integral equation. The integral equation is analyzed by the application of both asymptotic and variational methods. Results indicate that the drag experienced in a micropolar fluid always exceeds that found in the absence of any micropolarity; however one of the parameters which characterizes a micropolar fluid can be used to minimize the drag.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01177110
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A uniqueness theorem for compressible micropolar flows (1987)
    Springer
    Acta mechanica 68 (1987), S. 185-191 
    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 Using an energy integral method it is proved that the motion of a non-heat conducting compressible micropolar fluid in a bounded regionV=V(t) is uniquely determined by the initial distributions of velocity, microrotation, density and temperature, together with certain boundary conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01190882
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    Paper (German National Licenses)
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