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  • 1
    Electronic Resource
    Electronic Resource
    Anatomical basis of the surgical approach to the medial wall of the orbit (1985)
    Springer
    Surgical and radiologic anatomy 7 (1985), S. 15-21 
    Details
    ISSN: 1279-8517
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs, à partir des résultats de 70 dissections orbitaires réalisées après injection du système artériel par du latex, étudient les principaux éléments vasculonerveux en rapport avec la paroi médiale de l'orbite: artère ophtalmique, artères ethmoïdales, nerfs trochléaire et nasal. Ils décrivent notamment leur situation, leurs rapports et les différentes variations rencontrées. Par rapport aux descriptions classiques, les auteurs ont noté quelques différences, notamment en ce qui concerne la situation de l'artère ophtalmique qui est habituellement placée en dedans du muscle oblique supérieur, après l'avoir croisé par au-dessous. Un repère chirurgical important, l'orifice latéral du canal ethmoïdo-frontal antérieur, site d'abord de l'artère ethmoïdale antérieure, a été noté et sa situation précisée.
    Notes: Summary The main neurovascular structures related to the medial wall of the orbit were studied in 70 orbits after injection of the orbital arterial bed with latex dye. The position, anatomical relations and variations of the ophthalmic and ethmoidal arteries and trochlear and nasociliary nerves are described. Some differences were noted in comparison to classical anatomical descriptions, notably regarding the position of the ophthalmic artery which was commonly found to lie medial to the obliquus superior muscle distal to the point where it crosses under the muscle. An important surgical landmark, the lateral orifice of the anterior ethmoidal canal which lodges the anterior ethmoidal artery, was noted and its position described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01654625
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  • 2
    Electronic Resource
    Electronic Resource
    Genotypic Composition and Mildew Resistance in a Natural Population of Wild Barley, Hordeum spontaneum (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 99 (1987), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Two sets of accessions were sampled, tram a natural population of Hordeum spontaneum at Shelomi, Israel, viz.: 100 ears along a transect at intervals of 1—1.5 m and 10 ring clusters of 10 ears each, circling each 10th plant of the transect. Single ear progenies were tested for banding patterns of 5 allozyme loci; in addition, hordein sanding; and field reaction against powdery mildew has been determined. 56 allozyme genotypes and 13 hordein patterns were determined. Most of the progenies showed susceptible to moderately susceptible infection types and high frequencies of low infection grade (slow mildewing). For all characters spatial grouping was found in plants derived from neighbouring transect parents. This was even more pronounced in the ring clusters. Reactions to mildew infection appeared to be closely correlated with hordein banding. In addition, accessions showing hypersensitive reactions carried excessive frequencies of a certain allele of the Est-1 locus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1987.tb01160.x
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrodynamic stability of the spherical front of a reaction accompanied by a strong increase in viscosity (1988)
    Springer
    Fluid dynamics 23 (1988), S. 361-367 
    Details
    ISSN: 1573-8507
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The hydrodynamic stability of the steady spherical front of a reaction accompanied by a strong increase in viscosity taking place in a radial, centrally symmetric flow of condensed reaction medium is considered. The flow is assumed to be bounded by two permeable concentric spherical surfaces. The stability is investigated in the linear approximation with respect to small perturbations. A relation is obtained for the dependence of the perturbation growth rate on the parameters of the problem: the viscosity ratio of the medium at the front, the ratio of the boundary surface radii to the radius of the front, and the dimensionless hydrodynamic resistances of the boundary surfaces. It is shown that the front is stable over almost the entire physical region of variation of the parameters and that instability occurs only in the case of a low hydrodynamic resistance of the outer boundary surface as the front approaches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054741
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  • 4
    Electronic Resource
    Electronic Resource
    Finite element method solution of simultaneous two-dimensional heat and mass transfer in laminar film flow (1988)
    Springer
    Heat and mass transfer 22 (1988), S. 347-354 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Mit Hilfe der Methode der finiten Elemente wird eine Lösung der gekoppelten Wärmeund Stoffübertragung für die Absorption eines Dampfes, mit hoher Absorptionswärme, in einer laminaren Filmströmung beschrieben. Konvektion und Diffusion parallel und senkrecht zur Strömungsrichtung werden beobachtet. Temperaturund Massenfraktionsprofile werden gezeigt. Der Vergleich mit einer Lösung für eine ein-dimensionale Strömung und dazu senkrechter Diffusion zeigt, daß mit abnehmender Peclet-Zahl die Abweichungen zu unserem zwei-dimensionalen Modell steigen.
    Notes: Abstract A finite element solution is given for the coupled heat and mass transfer taking place when a vapour with considerable heat of absorption is absorbed into a laminar film flow. Convection and diffusion parallel and perpendicular to the direction of flow are taken into account. Temperature and mass fraction profiles across the film are given as well as results in film flow direction for several values of the Peclet number. Comparison with a solution based on one-dimensional flow and diffusion perpendicular to the flow, shows that deviations from this case by our two-dimensional solution increase for decreasing Peclet number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387891
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  • 5
    Electronic Resource
    Electronic Resource
    Numerical experiments and theoretical analysis of the flow of an elastic liquid of the upper-convected Maxwell type in the presence of geometrical discontinuities (1985)
    Springer
    Flow, turbulence and combustion 42 (1985), S. 303-318 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The upper-convected Maxwell model of an elastic liquid is solved by means of the finite element method, using a penalty function approach. It is shown that the algorithm produces oscillations in the stresses in the presence of geometrical discontinuities, for increasing Deborah number De. The cause of this problem is explored and an indication of how to solve this problem is given. The complete set of equations appears to be of the mixed hyperbolic-elliptic type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384209
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Stationary flows in channels during similarity wave propagation of a chemical reaction with an abrupt change in viscosity (1986)
    Springer
    Journal of applied mechanics and technical physics 27 (1986), S. 54-60 
    Details
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00911121
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  • 7
    Electronic Resource
    Electronic Resource
    Hydrodynamic stability of a cylindrical reaction front associated with a strong increase of viscosity (1988)
    Springer
    Journal of applied mechanics and technical physics 29 (1988), S. 216-224 
    Details
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00908585
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  • 8
    Electronic Resource
    Electronic Resource
    A finite element analysis of the steady laminar entrance flow in a 90° curved tube (1989)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 9 (1989), S. 275-287 
    Details
    ISSN: 0271-2091
    Keywords: Curved pipe flow ; Entrance flow ; Finite element method ; Penalty function method ; Experimental validation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A standard Galerkin finite element penalty function method is used to approximate the solution of the three-dimensional Navier-Stokes equations for steady incompressible Newtonian entrance flow in a 90° curved tube (curvature ratio δ = 1/6) for a triple of Dean numbers (κ = 41, 122 and 204). The computational results for the intermediate Dean number (κ = 122) are compared with the results of laser-Doppler velocity measurements in an equivalent experimental model. For both the axial and secondary velocity components, fair agreement between the computational and experimental results is found.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650090304
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  • 9
    Electronic Resource
    Electronic Resource
    A finite element approximation of the unsteady two-dimensional Navier-Stokes equations (1986)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 6 (1986), S. 427-443 
    Details
    ISSN: 0271-2091
    Keywords: Navier-Stokes ; Equations ; Time Integration ; Penalty Function Approach ; Oscillating Flow ; Vortex Shedding ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper a penalty finite element solution method for the unsteady Navier-Stokes equations for two-dimensional incompressible flow is described. The performances of the Euler implicit (EI) and the Crank-Nicolson (CN) time integration methods are analysed. Special attention is payed to the undamped pressure oscillations which can occur when the Crank-Nicolson integration rule is used in combination with the penalty function method. Stability and convergence properties are illustrated by means of the computation of fully developed oscillating flow between two flat plates. Furthermore, the von Karman vortex street past a circular cylinder is computed to demonstrate the behaviour of the time integration schemes for a more complicated flow. It is concluded that the EI method has its advantages over the CN method with respect to the damping of numerical oscillations. However, for flows with an important convective contribution, where physically originated oscillations may be present, the CN method is preferable.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650060703
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  • 10
    Electronic Resource
    Electronic Resource
    A review of some finite element methods to solve the stationary Navier-Stokes equations (1985)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 5 (1985), S. 269-280 
    Details
    ISSN: 0271-2091
    Keywords: Navier-Stokes Equations ; Finite Element Method ; Solenoidal Approach ; Penalty Function Approach ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper the integrated solution approach, the penalty function approach and the solenoidal approach for the finite element solution of the stationary Navier-Stokes equations are compared. It is shown that both the penalty function approach and the solenoidal approach compare favourably to the integrated solution method. For fine meshes the solenoidal approach appears to be the cheapest method.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650050306
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    Paper (German National Licenses)
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